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Slingsby T.49 Capstan

Slingsby T49B Capstan
Intended as a successor to the T42 Eagle the Capstan side-by-side two-seater is designed to be suitable for all stages of dual instruction, and also for club or private owner use; a wide cg range enables it to be flown solo when required.
Design work began in 1960 and the prototype, the T49A first flew on 4 November 1961; this differed slightly from the T49B production version, having a smaller fin and rudder.
Of conventional wooden construction, the Capstan has glassfibre covering for the nose section and other double curvature panels and fairings, with ply and fabric covering elsewhere. The cantilever high-set single-spar wings have a plywood leading edge torsion box and fabric coveirng aft of the spar; there are dive brakes in the upper and lower wing surfaces and the ailerons are plywood-covered. The wings are attached to each side of the fuselage with three pins, making for ease of rigging. The forward fuselage is made up of spruce frames attached to a central keel box and is covered in glassfibre, while the rear fuselage is a braced wooden girder structure, with a bottom skin of plywood and the top and sides fabric-covered. The fixed surfaces of the cantilever tail unit are plycovered and the control surfaces fabric-covered; there is a trim tab in the starboard elevator. There is a nose skid under the forward fuselage mounted on a full-length rubber shock absorber, and a fixed Dunlop monowheel with a band brake, plus a leafspring tailskid. The two pilots sit under a rearward hinged one-piece Perspex canopy, and all controls are duplicated except for the tow release and elevator trimmer.



Production started in the spring of 1963, and altogether 31 T49B Capstans were built, plus two more constructed in New Zealand by Mr Fred Dunn from kits supplied by Slingsby; price of the T49B was £1,750 in October 1963.
The T49C Powered Capstan was a standard Capstan fitted with a 45hp Nelson H-63CP four cylinder two-stroke engine mounted on a pylon behind the cockpit and driving a pusher propeller. Small wing tip wheels and a tail wheel instead of a skid were fitted. The prototype, G-AWDV, first flew on 15 February 1968 at Wombleton, Yorkshire, but was burnt out in the fire that destroyed Slingsby's factory in November that year. It had been intended to make complete 'power eggs' available to convert existing Capstans but this idea was not proceeded with. The T49C had a maximum level speed of 85mph, a sea level rate of climb, when flown solo, of 510ft/min, and a take-off run of 420ft with two pilots.
The Capstan was Slingsby’s last wood two-place design.




T.49 Capstan
Wing span: 16.76 m (55 ft 0 in)
Length: 8.07 m (26 ft 6 in)
Height: 1.58 m (5 ft 2.5 in)
Wing area: 20.43 sq.m (220 sq.ft)
Wing section: NACA 63-620/6412
Aspect ratio: 13.75
Empty weight: 345 kg (761 lb)
Max weight: 567 kg (1,250 lb)
Water ballast: None
Max wing loading: 27.75 kg/sq.m (5.68 lb/sq.ft)
Max speed: 117 kt (217 km/h)
Stalling speed: 32.5 kt (60 km/h)
Min sinking speed: 0.66 m/sec (2.17 ft/sec) at 37.5 kt (70 km/h)
Max rough air speed: 80 kt (148 km/h)
Best glide ratio: 30 at 41 kt (76 km/h)


T.49B Capstan
Wing span: 16.78 m / 55 ft 0 in
Wing area: 20.43 sq.m / 219.9 sq.ft
Length: 26 ft 6 in
Height: 5 ft 2.5 in
Empty Weight: 345 kg / 761 lb
Payload: 222 kg / 489 lb
Gross Weight: 1250 lb /567 kg
Wing Load: 5.68 lb/sq.ft / 27.7 kg/sq.m
Aspect ratio: 13.75
L/DMax: 30 @ 84 kph / 45 kt / 52 mph
No. of Seats: 2
MinSink: 0.79 m/s / 2.17 fps / 1.54 kt at 43.5 mph
Max speed: 135 mph
No. Built: 34
Airfoil: NACA 63-3-620
Structure: all wood, fiberglass nose and fairings
T.49B Capstan
Engine:  Nelson, 45 hp / 34 kW
Wing span: 16.78m / 55ft 
Wing area: 20.43sq.m / 219.9sq.ft
Aspect ratio: 13.78
No. of Seats: 2
Airfoil: NACA 63-3-620
Structure: all wood, fiberglass nose and fairings








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