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Leading Edge Air Foils / LEAF World Cup
 
LEAF-WrldCup
 
The World Cup has a flatter glide angle, slower sinking speed, more sensitive pitch control, and quicker turning than a standard Rogallo, yet it is stable. A beginner’s glider for competition in the Standard or World Cup standard class.
The airframe is constructed from 6061 or 6063 aluminium tubing 1.5in x .049 depending upon size of glider. Each spar is drilled, sleeved, bushed, and end capped. The control bar (51in or 58in wide) and kingpost are constructed from 1in x .090 wall 6063-T832 alloy.
 
All wires are 3/32in 7x7 stainless steel clear coated. No weak links on flying wires. All wires are solid swedged with two nico’s. Two aircraft turnbuckles AN 155-16S in the top rigging allow wires to be tightened after assembly. Wingpost wires are 1/16in 7x7 uncoated stainless steel cable with one AN 155-8 turnbuckle (800 lb test) for tuning.
 
All tangs, 3 position bar box, kingpost bracket, wrap around nose plate, and thimbles are stainless steel. Wingnuts, castle nuts, nylocks, and bolts are aircraft quality.
 
The sails were Howe & Bainbridge 3.8 oz stabalised dacron with 11 colours. Prior to sewing, the cloth is overlapped and attached with double sided tape to insure positive sewing edges. All seams double zig-zag reinforced at stress areas. Wingpost and three battens per side give a quieter and smoother sail at different speed ranges.
 
A prone harness with knee hangers were optional.
 
The kingpost and control bars had black powder baked-on epoxy. Saddles for longer tube life.
 
200
Leading edge: 18.5 ft
Keel length: 16.5 ft
Wing span: 26.125 ft
Wing area: 200 sq,ft
Aspect ratio: 3.4
Nose angle: 90˚
Sail billow: 3.6˚
Weight: 42 lb
Pilot weight: 150-176 lb
Takeoff speed: 12 mph
Stall speed: 14 mph
Max speed: 42 mph
Best glide ratio (L/D): 5.5:1
Best L/D speed: 26 mph
Min sink: 380 fpm
 
220
Leading edge: 19 ft
Keel length: 17 ft
Wing span: 27.4 ft
Wing area: 220 sq,ft
Aspect ratio: 3.4
Nose angle: 90˚
Sail billow: 3.6˚
Weight: 44 lb
Pilot weight: 166-195 lb
Takeoff speed: 12 mph
Stall speed: 14 mph
Max speed: 42 mph
Best glide ratio (L/D): 5.5:1
Best L/D speed: 26 mph
Min sink: 380 fpm
 
244
Leading edge: 20 ft
Keel length: 18 ft
Wing span: 28.8 ft
Wing area: 244 sq,ft
Aspect ratio: 3.4
Nose angle: 90˚
Sail billow: 3.6˚
Weight: 49 lb
Pilot weight: 187-219 lb
Takeoff speed: 12 mph
Stall speed: 14 mph
Max speed: 42 mph
Best glide ratio (L/D): 5.5:1
Best L/D speed: 26 mph
Min sink: 380 fpm

 

LEAF-WrldCup-ld

 
 
 
 


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