THE RANGER ST (Microlight / Ultralight aircraft)
The prime difference between the ST (Microlight) and the XP (Cat A) Sherwood Rangers is one of wing span and wing loading
Tandem two-seat taildragger biplane
Wings - constant-chord unstaggered and swept
Tail – conventional
Flight controls - Pitch control by elevator on tail; yaw control by fin-mounted rudder; roll control by four Frise-type ailerons.
Wing bracing - wings braced by I-shaped interplane struts and steel flying and landing wires
Landing gear - Undercarriage has three wheels in taildragger formation bungee suspension on main wheels, bungee suspension on steerable tailwheel
Ground handing via steerable tailwheel, rudder and differential cable-operated brakes.
Construction aluminium tube, wood and fabric
Fuselage mounted engine driving tractor propeller.
External dimensions and areas
Length overall 6.1m, 20ft
Height overall 2.24m, 7.3ft
Wing span 7.92m, 26ft
Constant chord 1.0m, 3.3ft.
Dihedral 3° (lower wing only).
Sweepback 3.8°.
Total wing area 15.6m², 168ft².
Aspect ratio 7.92/1.
Wheel track 1.34m, 4.40ft.
Wheelbase 3.65m, 12ft.
Main wheels dia. Overall 33cm, 13in.
Tailwheel dia. Overall 20cm, 8in.
Power plant
Rotax 582 engine
Jabiru 2200
BMW R100
Rptax 912 (currently being looked at)
Fuel capacity 43lt, 9.5 Imp gal., 11.3 US gal.
Weights and Loadings
Empty weight 182kg, 400lbs. (Builder and engine dependant)
Max. take off weight 450kg, 992lb. Payload 268kg, 590lbs.
Load factors, +6, -4 ultimate.
Performance
Max. level speed 80mph.
Never exceed speed 100mph.
Economic cruise speed 70mph.
Stall speed 38mph.
Max. climb rate at sea level 800ft/min. (engine dependant)
Landing distance to clear 15m obstacle on grass N/A.
Service ceiling N/A.
Range at average cruising speed 200 miles.
Noise level N/A. (engine dependant)