SCOTTISH AVIATION Bulldog MDL 120/121 Model Guide
SCOTTISH AVIATION Bulldog MDL 120/121 · Model Guide
Overview
The SCOTTISH AVIATION Bulldog MDL 120/121 is a two-seat, side-by-side single-engine piston trainer. Beagle designed it and Scottish Aviation built it at Prestwick. The RAF bought 130 as the Bulldog T Mk 1 and sold them to civilian operators after withdrawing the fleet in 2001. For a buyer, the main questions are wing-spar fatigue life and how the aircraft has been used.
- Wing-spar fatigue life is the key issue: the as-built safe life is 114 FI, and many airframes are nearing it.
- Mod BH.193 raises the spar-joint safe life from 114 FI to 200 FI; de Havilland Support Ltd makes the kits.
- Max takeoff weight is 1066 kg. Above 1015 kg the g limits are +4.4 to -1.8g; at 1015 kg or below they are +6 to -3g.
- Check the g meter and aerobatic history: the checklist says do not fly if the g meter shows the aircraft was outside its limits.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at sprinkle.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Model Guide
- Year ·
- 2026
- File size ·
- 49 KB
- Copy found at ·
- sprinkle.com
Specifications & performance
Extracted from this document.
Specifications
- Seats ·
- 2
- Max takeoff weight kg ·
- 1,066
Performance
- Climb speed (kt) ·
- 80
- Crosswind limit (kt) ·
- 35
- Climb fuel flow (gph) ·
- 15
- Takeoff min fuel flow (gph) ·
- 16
- Spin min abandon height (ft) ·
- 3,000
- Climb speed above 5000ft (kt) ·
- 75
- Spin height loss per turn (ft) ·
- 350
V-speeds
- VNE_KT ·
- 185
- VNO_KT ·
- 135
- ROTATE_SPEED_KT ·
- 55
- MAX_CANOPY_OPEN_KT ·
- 120
- BEST_GLIDE_SPEED_KT ·
- 75
- STALL_CLEAN_1066KG_KT ·
- 53
- STALL_45_FLAP_900KG_KT ·
- 48
- FINAL_APPROACH_FULL_FLAP_KT ·
- 70
What is the SCOTTISH AVIATION Bulldog MDL 120/121?
The SCOTTISH AVIATION Bulldog MDL 120/121 is a two-seat, side-by-side single-engine piston trainer. Beagle designed it and Scottish Aviation built it. The RAF used it as a basic trainer until 2001, after which civilian operators bought the fleet.
What is the main age concern?
Wing-spar fatigue. The SCOTTISH AVIATION Bulldog MDL 120/121 has a stated as-built safe life of 114 FI, and cracking was found in the spar joint. Mod BH.193 raises the life to 200 FI, so ask whether it is fitted.
What is the maximum weight and g limit?
The checklist for the SCOTTISH AVIATION Bulldog MDL 120/121 gives a max takeoff weight of 1066 kg, with +4.4 to -1.8g. At 1015 kg or below the limits are +6 to -3g.
Is the aircraft approved for aerobatics?
Yes, per the G-BULL checklist for the SCOTTISH AVIATION Bulldog MDL 120/121: flaps up, with maximum speeds per manoeuvre (for example loops at 130kt). Inverted flight is momentary only. Check the airframe's fatigue record first.
What is the SCOTTISH AVIATION Bulldog MDL 120/121 Model Guide?
The SCOTTISH AVIATION Bulldog MDL 120/121 Model Guide is a model guide for the SCOTTISH AVIATION Bulldog MDL 120/121, dated 2026.
What year was the SCOTTISH AVIATION Bulldog MDL 120/121 Model Guide published?
The SCOTTISH AVIATION Bulldog MDL 120/121 Model Guide — the SCOTTISH AVIATION Bulldog MDL 120/121 model guide on file — is dated 2026.
Most owners only have the POH. Here's the essential set for the SCOTTISH AVIATION Bulldog MDL 120/121.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More SCOTTISH AVIATION Bulldog MDL 120/121manuals & documents
Related documents
- Scottish Aviation Bulldog Wing Spar ModificationSCOTTISH AVIATION Bulldog MDL 120/121 · Maintenance Manual
- DEHAVILLAND DH-82A TIGER MOTH II Model GuideDEHAVILLAND DH-82A TIGER MOTH II · Model Guide
- AEROPRAKT LTD A-22 LS Model GuideAEROPRAKT LTD A-22 LS · Model Guide
- Bulldog 120 ChecklistSCOTTISH AVIATION Bulldog MDL 120/121 · Checklist
- DEHAVILLAND DHC-1 CHIPMUNK Model GuideDEHAVILLAND DHC-1 CHIPMUNK · Model Guide
In this document
Airframe life and the spar modification
The Full Scale Fatigue Test set the as-built maximum safe life at 114 FI. Cracking in the wing-to-fuselage main spar joint led to Mod BH.193. It fits longer, stronger joint straps, new doublers and stepped bolts, and raises the safe life to 200 FI. The source article says it had been fitted to only one Series 120 and one Series 100 aircraft before the RAF programme ended. Ask for the aircraft's FI total and whether the mod is embodied.
Limits and handling figures to know
Never-exceed speed is 185kt and max normal operating speed is 135kt. Clean stall power-off at 1066kg is 53kt. Final approach with full flap is 70kt and the crosswind limit is 35kt. Aerobatics need flaps up and only momentary inverted flight is allowed. Spinning needs a minimum abandon height of 3000ft AGL, and each turn loses about 350ft. These figures come from one aircraft's checklist (G-BULL).
Pre-purchase inspection points
The checklist walkround covers the items to inspect: oil quantity (min 5.5 ltr, max 7 ltr), oil and fuel leaks, and alternator belt tension. It also covers cowling fasteners, tyre condition, nosewheel oleo extension of at least 8 cm, control-surface hinges and dents on the wing leading edges. In the run-up, magneto drop must not exceed 175 and oil pressure must be in the green band.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- The checklist is not authoritative; fly to the Pilot's Operating Handbook and the aircraft's C of A.
- Fatigue cracks give no warning until they appear, so confirm the airframe's fatigue life used against the 114 FI limit.
- Maximum canopy-open speed is 120kt. Fire drills call for bailing out above 1500 ft AGL if a fire continues.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
SCOTTISH AVIATION Bulldog MDL 120/121 Model Guide The SCOTTISH AVIATION Bulldog MDL 120/121 is a two-seat, side-by-side single-engine piston trainer. Beagle designed it and Scottish Aviation built it at Prestwick. The RAF bought 130 as the Bulldog T Mk 1 and sold them to civilian operators after withdrawing the fleet in 2001. For a buyer, the main questions are wing-spar fatigue life and how the aircraft has been used. • Wing-spar fatigue life is the key issue: the as-built safe life is 114 FI, and many airframes are nearing it. • Mod BH.193 raises the spar-joint safe life from 114 FI to 200 FI; de Havilland Support Ltd makes the kits. • Max takeoff weight is 1066 kg. Above 1015 kg the g limits are +4.4 to -1.8g; at 1015 kg or below they are +6 to -3g. • Check the g meter and aerobatic history: the checklist says do not fly if the g meter shows the aircraft was outside its limits. Airframe life and the spar modification The Full Scale Fatigue Test set the as-built maximum safe life at 114 FI. Cracking in the wing-to-fuselage main spar joint led to Mod BH.193. It fits longer, stronger joint straps, new doublers and stepped bolts, and raises the safe life to 200 FI. The source article says it had been fitted to only one Series 120 and one Series 100 aircraft before the RAF programme ended. Ask for the aircraft's FI total and whether the mod is embodied. Limits and handling figures to know Never-exceed speed is 185kt and max normal operating speed is 135kt. Clean stall power-off at 1066kg is 53kt. Final approach with full flap is 70kt and the crosswind limit is 35kt. Aerobatics need flaps up and only momentary inverted flight is allowed. Spinning needs a minimum abandon height of 3000ft AGL, and each turn loses about 350ft. These figures come from one aircraft's checklist (G-BULL). Pre-purchase inspection points The checklist walkround covers the items to inspect: oil quantity (min 5.5 ltr, max 7 ltr), oil and fuel leaks, and alternator belt tension. It also covers cowling fasteners, tyre condition, nosewheel oleo extension of at least 8 cm, control-surface hinges and dents on the wing leading edges. In the run-up, magneto drop must not exceed 175 and oil pressure must be in the green band. Safety notes: • The checklist is not authoritative; fly to the Pilot's Operating Handbook and the aircraft's C of A. • Fatigue cracks give no warning until they appear, so confirm the airframe's fatigue life used against the 114 FI limit. • Maximum canopy-open speed is 120kt. Fire drills call for bailing out above 1500 ft AGL if a fire continues.