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Noble Hardman Snowbird

noblesnow


Tandem two-seat single-engined high-wing monoplane with conventional three-axis control. Wing has swept back leading edge, unswept trailing edge and tapering chord; cruciform tail. Pitch control by elevator on tail; yaw control by fin-mounted rudder; roll control by half-span ailerons; control inputs through stick for pitch/roll and pedals for yaw. Wing braced from below by struts; wing profile NACA 4412 with 2.5 deg washout; 100% double-surface. Undercarriage has three wheels in tricycle formation; steel-spring suspension on all wheels. Push-right go-right nosewheel steering connected to yaw control. Brake on nosewheel. Aluminium-tube framework partially enclosed. Engine mounted below wing driving tractor propeller.

The Snowbird was a conventional three-axis machine with dual controls (including a dual throttle) and tube and Dacron construction. Its wing design uses a quarter-chord twin-tube main spar with resilient-foam D-sections and tube aft sections. The ribs are capped with aluminium and all fabric is removable for inspection and maintenance.

A feature of the float kit is that the floats will not be attached rigidly to the aircraft but will be fitted with a suspension system consisting of a front rocker-bar and air dampers.

Engine: Robin EC44, 50hp at 6500rpm
Propeller diameter and pitch 62 x 27 inch, 1.57 x 0.69 m
Toothed-belt reduction, ratio 2.8/1
Max static thrust 320 lb, 145 kg
Power per unit area 0.28 h p/sq.ft, 3.0hp/sq.m
Fuel capacity main tank 4.8 US gal, 4.0 Imp gal, 18.2 litre
Fuel capacity reserve 1.2 US gal, 1.0 Imp gal, 4.5 litre
Length overall 20.0 ft, 6.10 m
Height overall 7.6ft, 2.32m
Wing span 36.0ft, 10.97m
Chord at root 5.6ft, 1.70m
Chord at tip 4.4ft, 1.35m
Dihedral 2 degrees
Sweepback 3 degrees
Tailplane span 6.6 ft, 2.00 m
Fin height 4.1 ft, 1.25 m
Total wing area 180 sq.ft, 16.7 sq.m
Total aileron area 16.5 sq.ft, 1.53 sq.m
Fin area 12.5 sq.ft, 1.16 sq.m
Rudder area 7.5 sq.ft, 0.70 sq.m
Tailplane area 22.4 sq.ft, 2.08 sq.m
Total elevator area 7.5 sq.ft, 0.70 sq.m
Wing aspect ratio 7.2/1
Wheel track 6.3ft, 1.92 m
Wheelbase 5.2ft, 1.58 m
Nosewheel diameter overall 14 inch, 36 cm
Main wheels diameter overall 16 inch, 41 cm
Optional floats: length 12.0ft, 3.66m, buoyancy 1200 lb, 544kg
Empty weight 300 lb, 136 kg
Max take-off weight 696 lb, 316kg
Payload 396 lb, 180 kg
Max wing loading 3.87 lb/sq.ft, 18.9 kg/sq.m
Max power loading 13.9 lb/hp, 6.3 kg/hp
Load factors +6.0, -4.0 design
Max level speed 65 mph, 105 kph
Never exceed speed 80 mph, 129 kph
Stalling speed 28-33 mph, 45-53 kph
Max climb rate at sea level 750 ft/min, 3.8 m/s

 

 


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