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Restriction/Classification Cancelled Restriction/ Classification Cancelled Restriction/Classification Cancelled I 17 A C. Armstroags 14 Do V11w oted amd Is R. VIU MOOs evat 18-41-indh diameter jet mozzle at alAltudes ob .
ecMwarlson of angina Opervolon with zazzlo to operation with the standaN U t that use Mozzle vve a .
The altitude javArtance of the Mona 11 engIns,usinga MASS of jot Mazzler Is to Arestigate the F F F f F
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- FW14 Ca dearOS Of MtOUM Of tAS C to CD the elwactwistics of the variousaltitude is in test farwnce. Mis imestAgation ebasbar at Manaand 10MMUM7 Of ths The paww plant Is rated at 5000 pounds at sUtic,, zzle. Mw pow6r larml conUtions with an 18®75- pimt., test .# ItrumantatAm are described in c Part I of this report, reference 1.
A flov areap squam feet F Set tbrust, Fn not tbrustp a tip. of Smvity.,. 2 ft/0002 PROCEDMM %he test procedtire and the processing of the data for -this described in Part I e=ept for report Vere simllar to the wthods I below. - the addition of two steps described At the high altltu&e comd1tionso ran-prewmm ratio varied as mch as 51 powamt. The effect. of these variations was ellutmted Iw correcting Ike data by a factor obtained from mass plots or the Perfermme parawtwe against ralm-Preamwe ratio. Cross plots of this type are Wasented.
Air-flw masmveants presented in Part I depended on tbinwt any measiweamt, and therefore included the effect of mall discrep- incise in the tbxuat mamwwwnt,. In the prommt paW the air- flov data presented vwe calculated from the averaged 'tail -pipe-rak's readings by use of the following relation: Z__l 7 (?7 y = Pry "g - 1 : Pr in vhIch the static tw*erat=s t7 was calauUted using a recavwy factw of 0.8 d6tw=Ined fi-m caUlwation tests.
000YIDEMMAL RAC. RY, No. EM4 P7 ^) t7.
air f2mv wma then obtained by daduattag the fuel the total gas flow.
= a E () OF DATA Genera l i zed Performance WF ` . AL, CMMMEMAL MCA M-1 No. EM4 W m to -Xi `fie corrected ) Increased slightly with increase In al i e (fig, s).
Mie corrected tail-pipe imdicated tsv4erature(fig 12) a Increases with increasing ram-pressure ratio.
first s and Ahen s.
The variation Ia Smteat at Effect of jet nozzle sizes. - Data a" pmeented for the 18.75 3. €ater "Jef nozzles at a ratio of 1.70 1,9 CON a, ..
FACA AR 1b. NM4 An IUMAdSmUca of the *a Ions Rwive None n tutojet .3 patU127 f for fte sash* 09PINO& with an jwt nozzle. , x .. Mwx4p In e In Vneral w tba rww of variables tastedo on emmocted anew perfmmwe of I Was Possible ommuption and mt.Vwtwt data to s at at least SD t OOO feet laboratory: IMUlom CammiUse nal Advisory for Amrawatics, Mop Ame 14p 1946o Ito to ES;°F D tch
Corrected engine s p e e d , F T / n P ~ p s t
f e 1 W a a - . g ~ ~ s a w % . - 4'-
?t;.ur > 6 , - Corncl;;da\%, * t ' f - t p ' c
613 ' S ~ P c r . 2 ~ d 0s c ~ ~ ~ r r n t e ? c e ' ., :l ~t various r a a - ~ r a s s u r e rat!2z.
$vckt3s * ham-prassura rbn t l o , T,/pC, 6c
F5gur.e 11:', - E f f a c t aP ~arn-prt?2are.n~~4 Y T P B ~ ~ O OR
f u e l consumption, ( C ~ s s a plot from f 2gu C OPG' 'f DE?JflBBftL Restriction/Classification Cancelled Restriction/Classification Cancelled