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UP Ultralight Products Dragonfly
 
UP-Dragon-01
Dragonfly I
 
The 1974 Dragonfly Mark I was the first flx-wing, finite tip glider to be put into production. Designed for advanced and competition, it can be soared in approximately half the wind velocity needed for a standard Rogallo. It has a low sink rate, tight turning ability, broad speed range, and has no tendency to drop a wing even when banked at more than 40 degrees.
 
An exclusive quick set-up design uses a double pivot centre box which eliminates attaching or detaching the cross spar and leadspar assemblies. I has an adjustable centre of gravity control bar mounting bracket.
 
The leading edge spars are made from 6061-T6 1.75in x .049 aluminium tubing. Keel and cross-spar are 1.5in x .049. Ultralite Products saddles are used at all tubing joints. Rigging cable is 304 3/32in 7x7 stainless steel. Cables for deflexers are 1/16in 7x7 stainless steel.
 
All hardware is grade 8 aircraft bolts, washers and nuts. Stainless steel nose plate, tangs, control bar and kingpost bracket are fitted.
 
The sail is Howe and Bainbridge 3.8oz stabilised dacron and there was a choice of colours. Leading edge pockets are fitted for minimum airfoil distortion. Special soaring windows for upward visibility was optional.
 
The control bar was 6061-T6 1in x .083 aluminium with epoxy coating, and a swing seat was included.
 
The Dragonfly II is similar to the Mark I except the sail is fully battened and has less billow. It features doube plane deflexers to tune the wing shape and prevent leading edge distortion at high speeds. The sink rate, glide ratio and speed (increased 30%) are all improved.
 
 UP-Dragon-02
Dragonfly II
 
The leading edge spars are made from 6061-T6 1.75in x .049 aluminium tubing. Keel and crossbar are 1.5in x .049. The entire airframe is fabricated with stainless steel “telebush” units for strength. The Mark II has an adjustable centre of gravity control bar mounting bracket permitting 4in of total adjustment. An additional 5 lb could be saved by ordering the glider with 2024-T3 x .035 tubing.
 
Rigging cable is 304 3/32in 7x7 stainless steel. Cables for the deflexers are 3/32in 7x7 stainless steel. All hardware is grade 8 bolts, washers and nuts. Stainless steel nose plate, tangs, control bar and kingpost bracket are fitted.
 
The sail is Howe and Bainbridge 3.8oz stabilised dacron and there was a choice of colours. Leading edge pockets are fitted for minimum airfoil distortion. Special soaring windows for upward visibility was optional.
 
The 60in control bar is 6061-T6 1in x .083 aluminium with anodised finish. It could be ordered with prone or supine rigging or set up with ‘flip-flop’ wires for quick adjustment to either type of flying.

 

UP-Dragon
 
Dragonfly Mk.1
Wing span: 10 m
Hang glider weight: 21 kg
Packed length: 6.25 m
 
Dragonfly Mk.1
Leading edge: 20 ft
Keel length: 11 ft
Wing span: 32 ft
Wing area: 181 sq,ft
Aspect ratio: 5.47
Nose angle: 102˚
Sail billow: 3.0˚
Weight: 50 lb
Pilot weight: 150-200 lb
Takeoff speed: 15-17 mph
Stall speed: 12 mph
Max speed: 32 mph
Best L/D speed: 17 mph
Min sink: 258 fpm
 
Dragonfly II 140
Leading edge: 17 ft
Keel length: 10 ft
Wing span: 26.8 ft
Wing area: 140 sq,ft
Aspect ratio: 5.13
Nose angle: 104˚
Sail billow: 2.6˚
Pilot weight: 105-130 lb
Takeoff speed: 15 mph
Stall speed: 15 mph
Max speed: 42 mph
Best glide ratio (L/D): 7.25-1
Best L/D speed: 18 mph
Min sink: 226 fpm
 
Dragonfly II 160
Leading edge: 18.75 ft
Keel length: 10 ft
Wing span: 29.5 ft
Wing area: 160 sq,ft
Aspect ratio: 5.45
Nose angle: 104˚
Sail billow: 2.6˚
Weight: 50.5 lb
Pilot weight: 120-170 lb
Takeoff speed: 15 mph
Stall speed: 15 mph
Max speed: 42 mph
Best glide ratio (L/D): 7.25-1
Best L/D speed: 18 mph
Min sink: 226 fpm
 
Dragonfly II 180
Leading edge: 20 ft
Keel length: 11 ft
Wing span: 32.0 ft
Wing area: 181 sq,ft
Aspect ratio: 5.68
Nose angle: 104˚
Sail billow: 2.6˚
Weight: 54 lb
Pilot weight: 165-200 lb
Takeoff speed: 15 mph
Stall speed: 15 mph
Max speed: 42 mph
Best glide ratio (L/D): 7.25-1
Best L/D speed: 18 mph
Min sink: 226 fpm

 

UP-Dragon-ld
Dragonfly I
 
 UP-Dragon-ld2
Dragonfly II

 

 

 
 
 


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