Chapter 5 - Lancair Documents

•8 MS24694-S7 (or S5) countersunk m achine screws •8 Kl000-08 (8-32) nut plates vets •16 AN426AD-3-6 countersunk (3/32") n • 3/8" x .058 aluminum tubing • · 1}4" aluminum rod •4 M34-14 rod end bearings with check nuts (316-4) • 2 3/8" x .085 Aluminum tubing approx . 1.5" long •4 3/32" roll pins • Main gear door cutout pattern • 14" extruded aluminum hinge stock • 3/8" x 8" steel rod - • I REV. lo< Chapter5 1110-11-94 LANDING GEAR INSTALLATION 'P-✓CA/A® 320FB r~~~ ·1 ::--~-;-:•···,.·.,·.;-,.;.,,,-.,,.- B. Tools • Electric drill motor, 3/8" • 3/32" drill bit • 1/8" drill bit • 3/16" drill bit • 1/4" drill bit • 3/8" drill bit • #12 drill bit • .#19 drill bit • #32 drill bit • • • • • • • • • • 100° countersink 1/4" transfer punch or similar Saber saw with fine tooth blade C-clamp, small C-clamp, large (6") carpenter's square Drill press (optional, but very handy with a drill press vise) hack saw Band saw, metal cutting (optional) Dremel™ type routing tool with 1/8" dia. cutter 1/4-28 thread tap tap handle tape measure gear door template (blueprint) carpenter's level . tire pump or air compressor (for inflating tires) C. Materials & supplies • duct tape or similar release material • instant glue • flox • micro • BID materials • sandpaper, assorted grit • #10 wire, electrical • #18 wire, electrical Ic.)(CvCA/A® 320FB l:EJ·f-__:ccc;~;_ca,c_p.:_;tecc~__;:5_G_G..cEAR_RE_V_._IN_S_T_'.ALLA:_l/_l_0_-~~1--~-~--H~ Lllncair International Inc. Copyright C 1991, Radmcmd, OR 9775& Main Gear Assembly Drawing Figure 5-2 BOLT LIST FOR FIGURE 5-2: PART# 1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 QTY Description 8 AN4-13A 4 MS24694-S106 8 AN4-22A 4 AN5-42 2 AN3-7A 2 AN5-15 2 .AN4-34A 2 AN4-10 2 · AN6-30A 2 AN6-32A 4 AN4-14A 4 AN3-7A, 2 HM6M rod end bearing 2 AN316-6R check nut 2 AN3-7a 1 1441L & R Spring 4 WS-6 washers 1-1/4" Shrink tubing sleeve ' ~A® 320FB r;~;""'l·:·-,;·.;.·c v·c· ~ - ' ' Chapter5 . jREV. 2/1-6-95 >o< LANDING GEAR INSTALLATION M . 4. PROCEDURE \. Setting the main gear compression assemblies Our latest style of compression assemblies use a donut similar to that used on the Mooney aircraft. In fact, they are made by the same manufacturer. These units provide superior dampening properties. They also have the metal plates vulca- nized onto the synthetic rubber-like material. This simplifies the assembly as well. 1. This assembly requires the GM33A (black compression donuts with attached metal plates). Also required are the GM6 compression cap casting andAN4-34A bolts with AN365-428 stop nuts. 2. Note that all the biscuitshaveoneplatewitha 1/4"holeandonewitha 11/4"hole. The large diameter hole will accept the GM6 castings at top and bottom. The middle two biscuits will be orientated such that the thicker plates (with the large diameter holes) are AWAY from the center. See figure 5-3. 3.. Slip the AN4-34 bolt through and align the pieces. Use a pair oflarge C-clamps or cabinet clamps to squeeze the biscuits until the AN365-428 nut can be screwed on. Set the "ears" of upper and lower GM6 casting parallel by twisting and making a visual inspection until a close parallel condition is established. Set the amount of compression such that the holes in the GM6 castings measures 6" from center to center. Locate the nut to the bottom of this assembly. Mark that bottom end for later reference. NOTE: When assembling the compression assembly, use two washers under the AN4-35A bolt head and one washer under the nut. Otherwise you will run out of threads. ICAJVA® 320FB r5~~' I1---=c:.::~:.::R,:.Pt:..:e:::.~..:::5G_G..1.~_REV_._IN_S_T_'.ALLA:_1/_1...c.0_-~_1---'-~-~--l+~lE-J-I "•''""C"Yw.····,··· ~--------------~~ n Compression assembly Figure 5-3 6" * max. I I I I ~ I I I I *NOTE: This 6" dimension is ideal ~ since it places the least amount of ~ preload on the compression assembly. It also makes for a closer fit into the fwd GM6 , 1 -GM9 I I II II portion of the gear well. If necessary, reduce this.dimension to 5 7/8". This will have the effect of pulling the tire aft. I c..,{1:vCA/A® 320FBr~~9-"''i.•1-.....::~=ap~te~~:!..5G_GL:==-..:·_IN_S_T_:ALLA=-l/-=1:.::0..:·~..:.l•..:.~4.:.N_-+BiE+I ~-~~~~~L, <,, .-~=-=--==-=-=.,;...=___ __,,___,Lani::ai.r International Inc. Copyriaht Cl 1991, Redmond, OR 97766 B. Mounting the main gear brake assembly This is also straight forward. Main gear brake assembly Figure 5-4 GM30 ~\ GM32 GM34 1. Assemble the brake/axle assembly onto the gear leg casting as shown in figure 5- 4. The small 1/8" boss on the back of the axle will center into the brake alignment disk for mounting. Place the bolt heads outside of the gear leg casting for maximum gear door clearance. I c.:.,{1:vCA/A® 320FB II:: ~o 11-..:::CLAND::::h=ap,:::t::::e~~=5G_G.L~_v_.IN_S_T_'.ALLA:.::.1/...;;1:.:0...;;·~.::.1·...::~...::~--++¥-+l Laru:air International Inc. Copyri(ht C 1991,Redmcnd, OR 97756 C. Main gear primary and secondary attach points 1. Select the GM4 main gear alignment brackets. These aluminum machined parts will establish the porper alignment of the main gear pivot point with the overcenter link pivot point. They will be mounted to the GM12 phenolic which has been bonded into the center main spar. 0 GM4 alignment bracket Figure 5-4.1 ®oooo0 0 0 0 0 F'J.USJJ rosPA/1. CAP ON SOT'ia/1/1 . PCSITJOJI GM 4 J!!J!ACrET 70 _CUT.ED E,DGI! OJ'" GM IZ 8'/:Jl(,I! , WEJ./U"D ST:J.ND OFF f':ROTRU= AFT · (!l,r • &54/t Lmlt. PIVOT J!O/.T t.a:ATJON.) 2. Position the GM4 bracket per figure 5-4.1. The lower edge ofit will rest on the lower spar cap but the inbd end should be elevated slightly to provide adequate clearance for the 3/8" nut on the fwd face of the phenolic. Also note that the GM4 should have the welded standoff facing aft. 320FB l[EJ1---=-~=a::.,Pc..:t::::e~:...:5::...G_G_JEAR'-REV_._IN __ 8 T_~.=.ll_:l:.::O..:·~.:.l~.:.9~.::_-+f¥+j Lanwr Intemlldonal Inc:. Copyright e 1991,Redmand, OR 97766 3. Drill and mount the GM4 bracket using the four 1/4" bolts. Set them with the nuts ~ on the aft side to provide clearance for the aileron push rod which will operate on the fwd side. Drill for the 3/8" pivot bolt on the inbd side of the GM4. Be careful not to rock the drill bit when drilling through the GM4 because that could wobble out the hole and make for a sloppy fit. The overcenter link will attach to this position later. 320FB 115-12 If--'c=-=~=a:,;:P..:::te=:~:...:5::....G_G_~L.R_E_V_.IN_S_T_~::..:/..:::1...::-2=~-=-:=~-N--++~~ La:111:air Inlemational Inc. Copyright© 1996, Redmond, OR 97756 D. Main gear ~ver center link assembly 1. Per figure 5-6, press the roll pin to trip micro switch into position. BE SURE YOU PUT IT IN THE CORRECT SIDE OF THE LINK. IT MUST BE ON THE FORWARD SIDE (THE SIDE OPPOSITE THE SHOULDER WHERE THE GM4 MOUNTS). 2. Assemble the over center links per figure 5-6. Use care to position the nuts on the appropriate sides of the links, since this is important for clearance purposes. IMPORTANT: It is mandatory that the side of the upper arm with the shoulder be positioned so as to be on the A.EI: side of the assembly when fitted to the airframe. FAILURE TO ACCURATELY ESTABLISH Tms ABOVE CONDI- TION COULD RESULT IN AJAM WHEN CYCLING THE LANDING GEAR. -- Upper arm bearing location determination Figure 5-5 Micro switch pin on fwd side (not shown here) Shoulder on Al.'.:[ side (Dia. on shoulder side is approx. 3/4") (Opposite side Dia. is closer to 13/16'') •I It - iij '~ r II ii r-rn·•'1'' { 01 :.. t t,...& *- t ~ ]1 :~ t,=•-•_c•----'--'--'-'-i ~,2! ~ 0 0 !I~ § ~ ~~ OI ✓ HM-6M 0 r □ or--o \~ AN3-7A Main retract cylinder attach point Secondary attach point, ·fAN3-7A~ @ @ (Left side shown) Roll pin to trip micro switc~l MJ960-616 washers to 1GM4 2 ....Jfitjup to 3 allowed' · All nuts must be~ on the AFT side. ~dermust be on the aft side. ~ s· f? ~ 0 ~ l"%j '1 ~- (j ~ (I) It> l:S 'i" it0, '1 t-1 ~ B:'rn (I) ~-'< E. Main gear door cut outs 1. The main landing gear cut outs must be made before the landing gear itself can be aligned. Select the gear door template which was used during the cockpit closeout rib installation. You will note the alignment indicators from the blueprint which show the aft face of the main spar. The BL 50 position is not critical and may vary from one builder to another. Position the gear door template on the lower wing skin and trace off its contour. The door will be cut out of the skin. It is perhaps easier to perform this task with the plane in the inverted position. Since the plane is quite easy to flip it is recommended that you do so. The traced off contour of the gear door should be made to both the inside and later the -Outside (bottom). The inside tracing will help assure that it's in the proper position, the bottom tracing is the one you will actually cut to. Position the complete landing gear, with wheel, in its proper position which will simulate the retracted position. Sight along the contour to verify that the cut out is in proper position. You can check to be sure that both top and bottom tracing are in alignment with each other by placing a bright light on one side and sighting the mutual alignment of the tracings on each side. 2" Main gear door cut out location Figure 5-7 Approx. inain gear {BL) pivot location I ciP?vCA/A" 320FB IEJ1---=Ch=LAND=a:s:.pte=~-=5-G_G..1.EAR_RE_V_._JN_S_T_'.ALLA-=1/-=l=-=O-=-~=l•...c~..:.~-..,,+')f-H Lancair lntematiomal Inc. Cal'}light C 1991,Red.mond, OR 97766 2. With the plane in the inverted position, cut the full gear door shape out of the bottom skin. (GULP!) NOTE: The main gear door cut lines can be straight (perpendicularly) through the core but the outbd cut mark (the one along the outbd hinge line, fwd to aft) will produce a tighter fit ifit is cut at the angle shown on figure 5-8. This is quite simply done with a fine toothed blade in a sabre saw. Simply angle the sabre saw for the outbd hinge line cut to achieve the above noted angularity. 2BID Gear door cut angles Figure 5-8 . ·:·. ' .. · - BL 50 rib on inbd wing section ... '• . . . . .. . .. .. •, .. . . . . . . ... . . . ; .:: ·... .. -.... : . . . . . ... - . . . - . . ..... . . . .·. :- . ·..... •, .. . : .. --~ ·..?:-: ·:... : 2BID 2 BID Gear door shown \ Gear door outbd hinge 2 BID d l -r~""' . in retract position oor sea/_-<>+..........- / L Lower wing \ Note angle of c:t ------skin LLower wing skin Gear door outbd hinge I... : ;ill.-:.:.:.1..-:r,. jt:i:r.~,? r/:t .t)~ Gear door shown in .....,~.__----"down" position -------- Do not make the two cuts yet which will separate the door area into its three separate pieces. This can be made after the full door piece is removed from the bottom skin. ?IJJCA/A® 320FBI ;:·~~·1•1-~C:::::~:::a~p.::te:::::~.::.5:...G_G.J.EAR.::REV::,_:.:.·_IN_S_T_,\LLA:..=11:...1:.:0:...-~:.::1:..:~:..:~---l-f* I CL ' "~-------~~=~ lAnaair International Inc. Copyright. 01991,Rcdmood, OR 97766 3. With the doors cut out, return the plane to the upright positiori. 4. On the inside of the full gear door cut out piece, mark the location of the two separate cuts and on each side of the mark draw a line 1" away and parallel, see figure 5-9. 5. Scrape away the core material from the inside of the gear door per figure 5-9. 6. Add a _1 ply BID across this area and allow to cure. Gear doors Figure 5-9 LEFT MAIN GEAR DOORS:_-:'.'."'.'.:::::-::-:":'~ MIDDLE OUTED This cross sec. area is shown above I ci?(CvCA/A® 320FB l[~~:~~:::]f-.:::CLAND=ha::ips:.:t::::e~:.,:5::..G_G....!EAR_REV~._IN_S_T_'.ALLA:=1/-=1:.:.0·-=~=-1-0.:..9~=---+~ Lanc:air International In.e. Capyrighl C 1991.Rodmood, OR 9775B 7. . ·Next cut the doors apart on the original cut lines. • 8. Cover the two outbd doors and inbd doors with duct tape along the just cut edge. 9. Add a 2 BID tape 1.5" wide across the area per figure 5-9. These tapes will permanently bond to the middle gear door and form an extending lip onto which the other two doors will seat. 10. When the 2 BID tape has cured, pop the door apart, remove the duct tape and smooth the edges. You now have a custom made lip to seal the three piece door together when the gear is retracted. 11. Now place the outbd door in position and secure with tape or similar. 12. Position the 3/8" tubing per figure 5-11 to form the hinge. This hinge is made of 3/8" x .058 outer tubing with a solid 1/4" inner rod which will extend into similar 3/8" tube sections mounted on the wing skin. 13. To properly align the 3/8" tube, position it so that there is a 1/2" distance from the edge of the gear door to the edge of the tubing (see figure 5-10 for clarity). Positioning gear door hinge tube Figure 5-10 Roll pin 2BID , 3/8" x .058 tube (AL) Location of gear door hinge Figure 5-11 Llmc:air Int.a:rnadonal bu:. Copyright C 1991,Redmcad, OR 97756 14. To check the alignments, use either instant glue or hot glue dabs at each end to temporarily secure the 3/8" tubing in position. Do the same with the small receiving 3/8" tube sections on the wing skin. Insert the 1/4" rod segments and rotate the gear door through a 110° swing check for adequate clearance. 15. When the fit is OK, flox in the area under the 3/8" tubing where the arc of the gear door creates an opening under the tube. Next add a 2 BID layup over the tube contacting the door itself with at least 1/2" of contact per side, where possible. 16. Next cut the slots into the 3/8" tubing with a Dremel or similar small cutter. This slot should extend about 3/4", see figure 5-12. I. Outbd gear door hinge assembly Figure 5-12 This fwd position will determine the outward stop on the 1/4" rod 1/4" rod (Al.) ' Drill 3/32" hole & press roll pins into 1/4" rod 3/8 x .058 tube (Al.) passing through slot cu in 3/8" tube Slot in tubing i-- 3" --J 1/4" rod - approx 5 1/4" long ea. Cut spring to 4" free length Gear door typ. 17. Drill the 1/4" rod pieces with a 3/32" drill bit to receive the 3/32" roll pin. 18. Slip the rod into the tube until the hole appears in the slot of the tubing. Then pound the roll pin into the rod through the slot. o-?t2vCA/A® 320FB.r~:~;-·1J.•-__:Ch:::LAND..::a:!p:.!t:::::e~:....::.5G_GJ...~~v_.:c._IN_S_T_'.ALLA:..=11:_1::.:0:_-::.:~=--~=-~=---l-+¥+1 I ~ t.. ,,__._,"'"~,,-'--------'------~---"---"Lancail' International ID!::. Copyright C 1991,&dmcnd, OR 9'n56 19. Slip the ring into the other end and follow with the rod and roll pin insertion as above. Check that there is adequate spring load on the rods -it doesn't take much, just enough to keep the rods from ever vibrating out. This now forms the spring loaded hinge system which is easily removed from the bottom wing whenever necessary (primarily during wing insertion and removal to provide more working room). 20. Position the inner gear door in preparation for attaching the piano hinge. 21. This door will receive a 7" section of piano hinge as a means of attaching it to the plane. Locate this per figure 5-13. 22. Make the glass-to-glass bond area for the hinge per figure 5-13. 23. Notch the inner gear door and attach the hinge to it using four (4) 8-32 counter sunk machine screws, MS24694-S5, with nut plates. See figure 5-13. NOTE: The hinge halves must be turned around to establish the proper "pin" orientation shown in figure 5-13. 24. Positio:μ the door with the hinge and drill for the attachment to the cockpit closeout rib where the aluminum insert was earlier positioned. · 25. This half of the hinge will be pop riveted in 5 places to the closeout rib, see figure 5-13. 26. , Adjust/trim for any necessary clearances. The inner door should swing 90°. ~VCA/A® 320FBr~~;;'-f1--.::~=api:::t~e:!.~~5G_G.L~=.:v.:...IN_S_T_~::.11.:1.::.0·.:~::.l•.::.094.;_N_-+~Bfi-l I ~ I...·.··••'-"-·--·-·"~:.:.=...===~ Lancair Int.em.dona! Ine. C:ipyright.01991,Redmood, OR 9TI66 Installing gear door hinge Figure 5-13 This irregular shape will accept the door control horn. See blueprint ''L" for dims. and BID ply schedule 7" notch to inset the ctr Closeout rib .090 Al. insert . -----;-oo• hinge (A::= 114") ~ff ii \ ...... I:=¼:: Inbd left gear door p rivet (5 plcs.) - - , ll.. 3BID / / -- - I . :; I " '\ ,I ~ Fill with flox Lower wing/ fslgskin I I l \ 27. Gear door hinge L--~===~~o 1~ I / / Reverse one of the hinge - _ - .-/ pcs. and reassemble like above. Next, place the gear doors in the closed position having first covered their entire edges with duct tape as a release. The doors can be duct taped from the bottom into position or held by any suitable means. They should be in a good flush fitting position. I ~.l.il"!D4 I.D® 320FB 1•.•.r.~.··~·2·"·;..... ".·.1..•l-.::'.C:::::h::iap~te::::r~5::__...1..:.RE=V..:·__.=1/..:l:::O..:•l:::.l•.:.94.::__-+f¥+1 . c.:;;f?:~Allv~~ _• ... ,,,.. - •.. :L---'-LAND_c::..cIN:c...:G'-Gc.EAR __IN_S_T_'.ALLA: __TI_O_N_~___, LD.ncair InLllrnational Inc. Copyright C 1991,Redmand, OR 97756 28. Add a 3 BID tape all around the perimeter of the gear doors creating a permanent · bond to the inner wing skin. The duct tape will allow a full release where contact is made to the gear doors themselves. See figure 5-14. Forming glass lip for gear doors Figure 5-14 3 BID attached to inside wing skin, duct tape gear doors so BID tapes will release. 29. When cured, pop the gear doors out and finish off the glass lip which will now form the custom seal all around. Note: The seal lip will have to be trimmed out for clearance around the over center links - just clearance where necessary. The lip need not extend more than 1/4" to 3/8" onto the gear doors. 30. Finally, finish off the gear door and wing cut out areas by digging out about 1/8" of core material and filling with flox. Sand this smooth after cure. NOTE: The ctr section of the main gear doors will be fit later. It will bolt directly to the gear leg casting. I o?f;vcA/A® 320FB l[~~;;:·]~-=~=ap,:.t:.:e=-~-=5- GG.LEAR_RE_V_c·~ JNS_T_fil.LA:_;cl/__:1:_cO__:-~:.:::l•..c.~-~--1-f-¥-l-l Lancair Int.ernational. Inc. Copyriaht C 1991, Redmond, OR mo6 1. On the outer gear door, mark the position·which is 6" from the hinge point. This is where the aluminum angle bracket will be potted in to receive the gear door push rod, see figure 5-15. Potting angle bracket in main gear door Figure 5-15 Fwd edge of outbd gear door j-- 6" --'"7 6.5" for pre~ I ...._ -,l o tback gear 1"1 Holes are for flox when potting in position (1/4" D.) 70 ,___0_0 _ _1 l" 2. Make sure the push rod and bracket are per figures 5-15 and 5-16. 3. Insert the bracket by slicing the inner gear door skin and pushing the aluminum bracket into the core material area. 4. Pot the aluminum bracket into the gear door per figure 5-15. AJCA/A® 320FB ,EJ1--=Ch==LAND==acs:pc.:cte==~:...:5:..G_GL::-·-·IN_S_T_'.ALLA=.ll...:1:..:0...:·~:..:l...:•~...:~'---+f-'lf-H Outboard main gear door push rods Figure 5-16 --.:--- Tap with 1/4-28 tap NOTE: you will probably need to cut off some of the rod bearing shank for clearances. 3/8" x .085 Al. AN316-4 L1 3/8"_J 3 1/8" (Approx.) M34-14rod end bearing For 3/16" bolt 5. Mark and drill the main gear leg at the 7" position measured down from it's pivot center. Use a #12 drill bit. This is where the rod end bearing on the push rod will attach to the fwd face of the gear leg. 6. It is best to wait to adjust the gear door push rod until the upper wing skin is positioned since it will establish the actual gear stop in the retracted position and this will in turn establish the proper length adjustment of the outer gear door push rod. Later, when the plane is inverted and the inner top wing skin is mounted, you will have an easy time of adjusting this push rod and also mounting the remaining ctr door to the gear leg casting. ' . Drilling main gear leg for rod end bearing Figure 5-17 f7" ... ~#12 drill bit for outbd 0 gear door push rod &JCAfA® 320FB r~~;~""'1•1•-_c;:.:~::.:a::ep-:::t:'-e~:...5;;.G__GJ.::a-v-._IN_S_T_'.ALLA:_11_1_0_-~_1_;-~--+00 ,,.. ·c "> ✓ o: P•d·'--___;;..;.cc._ __;c....c;.;;:______c;::_c::.:_;--==::.:..:..;;_;__.1£__, G. Main gear aft attach point The final main landing gear alignment will be established by the positioning of this aft attach point. There will be two machine screws which will be permanent installations per aft attach point and also two AN4 bolts which will serve to hold both the aft attach plate and the outbd wing attach plate to the ctr aft spar, see figures 5-21 and 5-22. · 1. First level the fslg in the upright position. Leave room for the landing gear to swing t~ough its 90° arc from full retract to full down. 2. Position the landing gear with brake and tire assembly in place at the fwd primary attach point by inserting the pivot stub on the upper gear strut (black weldment piece) into the GM4 plate. 3. Slip the aft attach plate onto the aft end of the upper gear strut and place this end in approximate position against the ctr aft spar. Positioning landing gear Figure 5-18 Vertical adjustment ,_ of gear leg will esta- ' _blish the fwd-aft pos- ition of the tire _1--,:,,,,..c...... Spanwise adjustment will establish the toe in-toe out of the tire 4. Using a carpenters square (the larger the better), check the alignment of the TIRE by sighting down from above while the gear is in the down position, see figure 5-19. - JCA,l'A® 320FB •.•.!." 5_25 1.·•_1--_C_h_a,,_p_te_r_5_ _,_RE_V_.___ll_l_0_-1_1_-9_4_-t-\-X"-J-i LANDING GEAR INSTALLATION FI""'---------------~~ The carpenters square should have one side in alignment with the ctr main spar and the other (perpendicular) side used to align with the tread of the tires. When this alignment is achieved between the tire tread and the square, the tire will be tracking parallel to the center line of the aircraft. Use a C-clamp to lightly clamp the aft attach plate against the ctr aft spar. Checking TIRE alignment Figure 5-19 Use a C-clamp to hold in pos. for drilling Rotate spanwise until tire tread is parallel to edge ofsquare Large carpenter's square, set parallel to main spar 5. Now swing the gear through its 90° arc to the retract position. Since the top wing , skin is not yet on, this retract position can not be found with absolute precision but it doesn't matter at this point in time. Check that the gear has adequate clearance from the ctr main spar while in the retract position. The upper gear strut should be "relatively" parallel to the spar cap and a couple of inches aft of the spar itself. 6. Next, swing the gear back down. Sighting from the side, the gear strut should be approximately vertical, see figure 5-20. It is acceptable if the gear is swung fwd slightly but it should not be aft of vertical. · I ~l.lf"i!BIO® 301'\ir.nn. 1•.·.1.~.. ;~;.,~.-.·.·.,.•..,.1.•.. 1---=C=h=ap.::t:=e=-r.::.5_LRE_v,___1/;_1_:0_-1_1_-9_4_-l+)E+t , e>=""Ail_._....,l"IIL ~..t' .0 ,_,,,,,-~L----=LAND==IN=ccG=-=G=EAR=;:.;::INcc;S::.T='.ALLA:=='-"TI=-0::..N_ _,,_ _. Lanc:air International Inc. C4pyrlaht C 1991, &dmcnd, OR 97766 Also check this fwd to aft condition (in the down position) between the two gear struts. This can be easily accomplished by standing at the approximate position ofnnder one wingtip spar and sighting across the plane. Note the relative angle between the two gear struts; they should be in a parallel condition. Make any adjustments necessary to achieve these above conditions. 7. When the positioning is achieved, clamp the aft attach plates securely in preparation for drilling. Positioning gear strut to vertical Figure 5-20 ,,-Levelfslg GM5 attach block will locate at bottom of aft spar --;=:~----- l.5"to3°is1 acceptable 8. Using a 1/4" drill bit, mark off the first two attach locations per figure 5-22 and drill from the aft side of the ctr aft spar. Once the drill has reached the aluminum aft gear attach plate and left a mark, the attach plate may then be removed and the drilling completed in a bench which may prove to be easier. You must obviously be sure that you are drilling" straight" through the assembly or else the holes will not align properly. There is also a 1/4" piece of aluminum inside the ctr.aft spar web at this outbd gear attach position so be patient while drilling and don't allow the drill to lean back and forth while drilling or the holes will become elongated and sloppy. Lanca.ir Int.ernadonal lne.. Copyright C 1991,Rewnond, OR 97756 These first two attach holes will be closest (cin either side) to the gear strut itself. They will receive the 1/4" machine screws. They will require a 100° counter sink from the aft side of the ctr aft spar, see figure 5-22. These machine screws should be positioned as close as possible to the gear strut in order to leave the most possible room for the second set ofAN4 bolts which will follow later as the outbd wing attach bolts for the aft spar. NOTE: Make a spot check now to verify that there will be sufficient room for the two remaining 1/4" attach bolts. They must be solidly through the aluminum web insert and GM5 gear attach plate. AN4wing attach bolt @ Machine screw Main gear aft attach plate Figure 5-21 Side with bearing protruding must : be fwd so it will m. ate with the GMI gear weldment. ◄ OUTED INBD ► © @ fcountersu~ ' machine screw locates inbd., wing attach bolt locates outbd - NOTE: GM5 plate orientation is such that the pivot bearing will mount outbd and to the bottom of the plate. The bearing block shoulder should be to the aft side. NOTE: The four 1/4" bolt attach points are not critical regarding location. 9. With the first attach holes drilled and countersunk, the machine screws may be bolted in position thus locking the gear to the wing. Ctr aft spar Outbd · aft spar attach plate Lower wing skin FWD JOUTED Main gear aft attach (top view, left side) Figure 5-22 GMl BL50rib AN365-428 typ. There should be no free play (fwd/aft) of gear leg. Shim GM5 fwd with BID against spar ifreq'd. GM5 attach late ,=,a, I r-r'Y--, I _... --1-:' L t I I L I - - -r-:.,. -::i_ - - -r:..;-:.:-,-=! - , I : I I I I I I I I -------~~----~~--'--,/ '-.. I I I .Al~se';,.in MS24694-S106 2 plea. sp (attach these machine screws first) I ci1[ev&AJA® 320FB 101•.-~CLAND~ha~p~te~~~5~G-G.1EAR.:::RE::..:•V.:....IN_S_T....::~~10:...:-~::::1-=-~-=-~--+B~ Laneair International Inc. Copyright C 1991, Rodmond, OR 97756 H. 1. 2. 3. Main gear over center links With the gear in position, assemble and attach the over center links using the 3/8" bolts (see figure 5-6 and 5-2. Be absolutely sure that you have the correct link assembly on the correct side (refer back to over center link assembly drawing). The pin must be on the FWD face of the upper link and the shoulder of the bearing hole must be on the AFT face of the link for proper operation. The pin will later be adjusted to trip the micro switch to indicate "down and locked". Check the clearances by cycling the gear up and down several times by hand. Be sure that the slight rocking motion allowed for on the over center link assemblies is within limits by not interfering with the GM4 attach plate, see figure 5-24. Adjust the lower rod end on the links until the tire/wheelis in the vertical position relative to the ground. Tighten the check nut against the rod end bearing. Do not sight vertically against the lower wing as a reference since it has a three degree dihedral in it. Install the overcenter torsion springs. These maintain pressure on the links and assist in a free fall mode. Overcenter link springs Figure 5-22.1 ~~~· tonloa IJPri=a' u..ru NOTE: HF8 beariDC c:ut-&WBJ' (or cl&rity Springs Attach to Gear Weldment Figure 5-22.2 5/32" dia. hole is drilled only through fwd face of the tube. Over-center Linkage Boss L~.650" r -~ .610"!.-. Main Gear Weldment (GMl) .450" Over-center Linkage Boss Spring/Gear Weldment x/c Figure 5-22.3 Short end of the spring is inserted into theGMl WS-6 Washer) ' HF6 Bearingj AN970-6 Washer I 'I 'I I 'I r:., ' : I : I , I I 'I GMl I AN365-624A Loclmut Y!'Afe®3ofir:Ton. ~~~C~h~a~p~t~e~r~5-~R=E_V·~--4~/1~-2~3~-~96~-*~ __,.. --= "'4U.l' .ll L.'.:__j LANDING GEAR INSTALLATION Lnncair Intemntionnl Inc, Copyright© 1996, Redmond, OR 97756 4. Locate and center punch a spot on the gear weldment per Figure 5-22.2 and drill through only the fwd wall of the tube with a 5/32" bit. The hole position is somewhat critical so measure accurately. 5. AB a chafe guard, cut and install a 1/2" length of heat shrink tubing over the boss on the gear. Use a heat gun to shrink the tubing until it's tight on the boss. 6. Slide the torsion spring onto the weldment boss with the short end of the spring in the 5/32" hole. The other end will be spring loaded over the lower end of the overcenter link assembly. The WS-6 and AN970-6 washers, also secure the position on the boss. Spring Attach to Overcenter Links Figure 5-22.4 Over-center linkage apart. (Spring is unloaded.) GM3 (inbdhalf) GM3 (outbd half) Sprin Over-center linkage complete. (Spring is loaded.) Replace the AN4-12 with an AN4-10 bolt. Put an AN960-10 washer under the castle nut. 0 [Spring GM3 (outbd half) GMl GMl "' ,.,,_. "" ,,,,_,® 300r.r.,,,,, B Chapter 5 REV. 4 /1-23-96 vc;;;;x ~..l" il 5-32 ---"--'-"=-=----'-----=-:..=-=-..:::...::_--H-J~ LANDING GEAR INSTALLATION Lnncnir International Inc. Copyright O 1996, Redmond, OR 97756 7. Secure the outbd half of the GM3 to the weldment boss with a WS-6 washer on each side of the bearing. Tighten the AN6-32A bolt. 8. Hook the long end of the torsion spring over the outbd half of the GM3. Connect the halves of the GM3 assembly with the AN4-10 bolt. Be sure that there is a little lube in the swivel area of the GM3 assembly and that there is no binding. Attaching springs to gear leg · Figure 5-23 L------------1:·...:-·:.;·2:::::.....:i;::_=.a~~~r .....-_-:cAdjust to achieve vertical of tire I ~VCA/A® 320FB It ~~3; "J1--.::~!!a~pt:.:te::::~::...:5~G-G_JEAR_:REV=..:..:,-=--IN--ST_:ALLA:.=11_:1::.0---=~:::.1-..:.094-=-N---tf;~ IAncair International Inc. CopyrichL C 1991, Redmond, OR 97765 : MAIN SPAR - Strut clearance and travel Figure 5-24 J -- - __....GM4 ATTACHBRACKE T ,-- IC= -- r - I i - ,... :...., ,r-, .. - - Clearance betwe en and med. 3/8" washer over ctr link will establish degree of swing ' Free swing (sid e to side) of ssembly. arancefrom plate. over ctr link a Check for cle .the GM4 attach Check through full range ofmotio n. Ic;A€vCA/A® 320FB l[~~~~~J••I-__::C:::~:::ap!:.t:.:e=.~.c:5G_G.L.~_•_v_.IN_S_T_~_l_O_-~_l_•~-~--1+-)(:t Laneair Internadanal Inc. Copyria'ht c 1991,Redmond, OR m5G t ij fg. !. "lb,,. ~ ~Ill' f. ,~ ~ ~'j )~ f ® 11 r[!]·"····, , en i t Col I l en 1 ! ) t.-,.•..•.•., ...... A ~f2 ~ 'il "' 'il NOSE GEAR ASSEMBLY BREAKDOWN Figure6-25 @ ""'-~ ""'-~ ~-l;JI- o@ \/lt?'-11 10 ~ ~,i ""'1'@ 4, \ 11· 4> (J),p' ~ ~.@(',,.© @ \\~ \ Ifs"~ ..i.,: "'Ill. Cl~ ~ II> Q)J@) Pt. .,, 2 J 4 5 6 7 8 9 10 11 !I~ § ~iYo· z t 12 13 14 15 16 @p_e e@ Ill A· .. -~ ,,@ I I 7 \ r" atv Description 1 I · 3/8" steel _l)_in 2 I AN970-6 2_1 AN3-12A 1 I AN4-12A 1 I AN4-17 2 I AN3-5A 1 I AN4-11 2 I AN4-11A 1 I AN4-11 1 I Steel sleeve 1 I AN4-45A 1 I AN4-64A 4 I AN365-1 032 5 I AN365-428 3 I AN310-4 4 I AN526-1032R6 1(I) ~ ~ ii... (I) ~a.~O" enq ~ Ill ~-(Ill Nose gear assembly/ engine mount This section will contain assembly information for the model 320 nose gear and engine mount installation. I. Nose gear strut assembly 1. The Lancair 320 nose gear strut is the air/ oleo type and will arrive fully charged with all kits. The internal pressure setting may be adjusted depending on type of prop used (and the resultant airframe weight) etc. but we suggest that no changes be made until the plane has been taxi run for a few hours. The strut will likely remain in its fully extended position during airframe assembly, even after the engine has been installed. This will result in a pronounced nose up ground attitude. With the weight of the constant speed propeller (about 58 lbs.), along with a ''break in" of the internal seals, the strut should end up compressing about 3/4" - 1" when in the static load condition. 2. This strut has no scissors links and is fully internally shimmy dampening. WARNING: This strut assembly must not be taken apart. It is considered to be NON field repairable. Should adjustments other than the air charge be deemed necessary, it should be returned either to Neico Aviation or directly to Esco, its manufacturer. Any disassembly of the shimmy damp- ening chamber at the bottom will ruin its internal integrity and allow the possibility of a s:himmy condition, thus the plane must not be flown until Esco has re-assembled the unit. There should be no reason to disassemble this unit. 3. Select the nose wheel halves and their three bolts along with the two timken bearings. Install the inner tube into the tire by first applying just a small bit of air into the tube. Just add enough to get the wrinkles out of the tube. Too much air will make assembly difficult. 4. Push one side of the wheel through the tire / tube. 5. In order to prevent the chance of getting a pinched tube during assembly of the second wheel half, use a piece of thin cardboard (cereal box type) as a liner. This piece should be about 3" wide and long enough to go around the interior of the wheel, between it and the tube. See figure 5-26. 6. With the cardboard insert in position, the second half of the wheel can be pushed into position with it inside of the cardboard piece that is sticking up. This will prevent a pinched tube. Ici(8JCA/A® 320FB lt~~~:].f---=:Ch:::LAND:::ap,a:.t::;e:::.~-=5G-G..LEAR_REV_•_.IN_S_T_:ALLA:c.:.l/_1..:.0·..:.~cc.1·..:.~-~---l+'lH-l Lancair!ntematioQIUine., Copyright.Cl991,Rodmond,ORm66 Cardboard Tube Wheel & tire Assembly Figure 5-26 7. Install the three nose wheel connecting bolts and tighten them securely. Then inflate the tire to 35 lbs. 8. Slip the timken bearings into position on the wheel and insert the steel tubular nose gear axle, GM25. The bearing must have axle grease packing prior to assembly. 9. Position the above assembly into the fork and insert the two axle plugs, GM38. These plugs will slip over the axle. 10. Insert the AN4 bolt and tighten it up until the wheel drag becomes such that with a good spin on the tire, not more than one free revolution results. (However, you · should first install the tire strap before tightening the through bolt, see step 11 since it will align the two axle plugs and prevent them from spinning.) 11. Place a small dab of paint or equiv. over the nut and end ofbolt. This provides a visual check to verify that the nut is not loosening during flight operations. WARNING: The nose gearwheel must have sufficient friction (as described above in step 10) to prevent possible shimmy. Failure to keep the wheel properly snugged could result in ~bimmy. This must be checked on a regular basis by having someone push the tail down momentarily while you check \. the rotational resistance on the wheel. - I c.,{1:vCA/A® 320FB IBf--=CLAND=ha::,P;:.:tc=e~=-5=-G-GL=-·-IN-ST_i\LLA:..::ll....:1:..:0-=-~=1-..::~..:.~--tfBI Lancair International Inc. C4pyria:ht C 1991,Rcdmcnd. on 97756 ack of the nose gear tire and attaches· 12. Install the tire strap that fits around the b to the fork on each side. Note that this fork plug is prevented from rotating. Align the is the means by which the GM38 axle flat spot on the side of the GM38 axle plug with the tire strap. This strap will help guide the wheel into event of a turned wheel after lift off. the nose gear tunnel in the unlikely ' . Chapters I~- JJ 10-11-94 LANDING GEAR INSTALLATION ~ l'>v< I?< J, Engine mount/ nose gear attach & align 1. The firewall has been marked for engine mount primary attach points (tbe 4 perimeter points). Note that there are two additional attach points (one on each side of the tunnel), see figure 5-27. 2. It is best to first drill only 1/8" pilot holes for tbe primary mount attach holes in the firewall. Use the mount itself as a final hole position check. The holes could easily be_offjust a little since, even with stress relieving, some "pull" will result in the erigine mounts. Do not force tbe mount to attempt to align witb tbe markings, simply average the differences and drill accordingly. The holes should not be off by more than 1/4" in any plane or direction tbough. The mount may be bolted into temporary position. The final installation will require tbe fiberfrax and stainless over the firewall before the mount is attached permanently. The fwd deck should be clecoed into position and the 2 BID attach tapes applied such that they are bonded to the firewall and "released" from the fwd deck lip. Use duct tape or plastic tape as a release. You will thus have a mating flange bonded to the firewall which will allow you to proceed ahead and add the fiberfrax, stainless and mount. Later the fwd deck can be permanently attached using structural adhesive along tbe flange on tbe firewall. The fwd deck should not be bonded on until tbe wiring is completed, etc. Also, you may wish to make te fwd deck removable as is outlined in chapter 11. 3. Trim and fit the fiberfrax and stainless steel. These materials can be mounted using high temp. silicone squeegeed on between layers. NOTE: Save tbe left over pieces, you11 need tbem in chapter 21 for shielding in the nose gear tunnel. 4. Position tbe nose gear assembly on tbe mount using tbe GM5 attach plates. Clamp into temporary position with small C-clamps to make ready for final adjustments. ~---------,. ,,------,--------+'x-1.---1 320FB E].1-__::Ch::::LAND:::a:!:p.:::te::::~..::5:....G_G-1.~.:...REV::..:....._IN_S_T_'.ALLA:..=1/_:l::O_:·~::l....:•~....::---++~¥+1 Lancair Inten:mtional Inc. Copyria:M C 1991,Rodmmul., OR 97766 • -Firewall layout Figure 5-27 Ref.* level lin FIREWALL DETAIL CROSS SECTIONAL VIE ,,...-,FWD L 16 112" -....i-- 16 13" .023" stainless steel lB • • 1/4" A. C. plywoodl---!t-1-+-!H.. *NOTE: Level line is for reference purposes only. It does not aligh with longerons, etc. Steel Sleeve Nose gear/ engine mount Figure 5-28 GM14 lB FWD NOTE: There are two directions which affect the positioning of the nose gear-for proper alignment on the engine mount. Laneair ln~tional Inc:. Copyrla"bt C 1991,Redmond, OR 97766