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Mainair Puma

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Puma Sprint MS

The Mainair/ Southdown Sailwings Puma MS is a tandem two-seat single-engined flex-wing aircraft with weight-shift control. Rogallo wing with fin. Pilot suspended below wing in trike unit, using bar to control pitch and yaw/roll by altering relative positions of trike unit and wing. Wing braced from above by kingpost and cables, from below by cables; floating cross-tube construction with >75% double-surface enclosing cross-tube; pre-formed ribs. Undercarriage has three wheels in tricycle formation; no suspension on any wheels. Push-right go-left nosewheel steering independent from yaw control. Brake on nosewheel. Aluminium-tube trike unit, with optional pod. Engine mounted below wing driving pusher propeller. All airframe tubing is bright anodised drawn seamless aluminium to British HT30TF specification. All bolts are aircraft quality AN series.
The Puma MS uses an identical trike unit to the Tri Flyer Two-Seater/Dual Striker, but instead of the Flex-iform wing a Southdown Sailwings Lightning DS is used.
The Puma Sprint MS is the same as the Puma MS except a 70% double-surface wing.

Puma MS

Engine: Robin EC44, 50 hp at 6800 rpm.
Propeller diameter and pitch 62 x 27 inch, 1.58 x 0.70 m.
Toothed-belt reduction, ratio 2.3/1.
Max static thrust 275 lb, 125 kg.
Power per unit area 0.26 hp/sq.ft, 2.8 hp/sq.m.
Fuel capacity 2.6 US gal, 2.2 Imp gal, 10.0 litre.
Length overall 11.2ft, 3.41m.
Height overall 10.0ft, 3.05m.
Wing span 34.5ft, 10.52m.
Chord at root 8.0ft, 2.44 m.
Chord at tip 3.5 ft, 1.07 m.
Anhedral 1.5 deg.
Nose angle 130 deg.
Fin height 3.3ft, 1.01m.
Total wing area 195 sq.ft, 18.1 sq.m.
Wing aspect ratio 6.3/1.
Wheel track 6.0 ft, 1.83 m.
Wheelbase 6.0 ft, 1.83m.
Nosewheel diameter overall 16 inch, 406mm.
Main wheels diameter overall 16 inch, 406mm.
Empty weight 310 lb, 141kg.
Max take-off weight 560 lb, 254kg.
Payload 250 lb, 113kg.
Max wing loading 2.87 lb/sq.ft, 14.0 kg/sq.m.
Max power loading 11.2 lb/hp, 5.0kg/hp.
Load factors +4, -2 design; +6, -3 ultimate.
Max level speed 50mph, 80kph.
Never exceed speed 60mph, 97kph.
Max cruising speed 50mph, 80kph.
Economic cruising speed 43mph, 69kph.
Stalling speed 25 mph, 40 kph.
Max climb rate at sea level 600 ft/min, 3.0 m/s.

Puma Sprint MS
Engine: Robin EC44, 50 hp at 6800 rpm.
Propeller diameter and pitch 62 x 27 inch, 1.58 x 0.70 m.
Toothed-belt reduction, ratio 2.3/1.
Max static thrust 275 lb, 125 kg.
Power per unit area 0.28 hp/sq.ft, 3.1 hp/sq.m.
Fuel capacity 2.6 US gal, 2.2 Imp gal, 10.0 litre.
Length overall 11.2ft, 3.41m.
Wing span 34.5ft, 10.52m.
Chord at root 8.0ft, 2.44 m.
Chord at tip 3.5 ft, 1.07 m.
Anhedral 1.5 deg.
Nose angle 130 deg.
Fin height 3.3ft, 1.01m.
Total wing area 195 sq.ft, 18.1 sq.m.
Wing aspect ratio 6.3/1.
Wheel track 6.0 ft, 1.83 m.
Wheelbase 6.0 ft, 1.83m.
Nosewheel diameter overall 16 inch, 406mm.
Main wheels diameter overall 16 inch, 406mm.
Empty weight 310 lb, 141 kg.
Max wing loading 1.72 lb/sq.ft, 8.4 kg/sq.m.
Max power loading 11.2 lb/hp, 5.0kg/hp.
Load factors: >+6.0, -3.0 ultimate.

 

 


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