Seagull Aircraft Seagull ![]() Seagull 3
![]() Seagull 3
![]() Seagull 3
The Seagull IIIZ has adjustable trim to adjust the control bar pressure in varying positions. It is fitted with split crossbars and padded control bar. The airframe is made from 6061-T6 1.75in x .058 anodised aluminium tubing. Rigging cable is 7 x 19 stainless seel with white vinyl coatin, and all hardware is aircraft quality stainless steel.
![]() Seagull IIIZ
The sail is made from 3.8oz stabilised dacron and was available in 12 colour combinations. The options for pilot support were seated, supine or prone harness.
The Seagull 4 was almost identical to the Seagull 3. The most conspicuous difference was a cambered, S-shaped keel instead of a straight tube. It also had a two-piece swept-back cross-brace rather than a single tube.
The Seagull IV is a high performance glider designed for Hang Three pilots and for open competition. It is a direct descendent of the Seagull III, using the same truncated conical shape, but with much higher performance characyeristics. The Seagull IV has the same nose angle and curved leading edges, but a much shorted, curved keel. The sail is very flat and its trailing edge is roached outward, instead of the normal hollow cut. This was the first glider designed with a shaped, cambered keel and a roached, battened sail.
![]() Seagull IV
The Seagull IV has adjustable trim allowing pilots to adjust the control bar pressure for ideal comfort in varying conditions. Split cross bars for convienence, and padded control bar. The airframe is made from 6061-T6 1.75in x .058 anodised aluminium tubuing. Rigging cable is 7 x 19 stainless steel with white vinyl coating. All hardware is aircraft quality stainless steel.
The Seagull IV sail is made from 3.8oz stabilised dacron, in a choice of 12 colours. The Seagull IV was supplied with options of seated, supine or prone harness.
The Seagull VII has adjustable trim allowing pilots to adjust the control bar pressure for ideal comfort in varying conditions. Split cross bars for convienence, and padded control bar. The airframe is made from 6061-T6 1.75in x .058 anodised aluminium tubuing. Rigging cable is 7 x 19 stainless steel with white vinyl coating. All hardware is aircraft quality stainless steel.
The Seagull VII sail is sewn with no billow, the stability being derived from the curved tubing and diffused wingtips. The low sail billow cuts resists prolonged sail inversions in thermal turbulence. The anhedral tips combined with the radial, tapered, foam sandwich battens provide for the lowest tip vortex possible. The Hang Four rated Seagull VII exhibits a smooth, positive pitching moment at any angle of attack.
![]() Seagull 5 - Pilot Jack Schroeder
The cambered keel was not on the Seagull III but on the Seahawk and the Seagull V (Verticle Stabilizer) model.
![]() Seagull 7
![]() Seagull VII
The Seagull VII has adjustable trim alloing pilots to adjust the control bar pressure for ideal comfort in varying conditions. Split cross bars for convienence, and padded control bar. The airframe is made from 6061-T6 1.75in x .058 anodised aluminium tubuing. Rigging cable is 7 x 19 stainless steel with white vinyl coating. All hardware is aircraft quality stainless steel.
I knew Jack. I was one of the factory pilots from Telluride in those days. Part of the TAF (Telluride Air Force). It was tragic when Jack became a paraplegic from a mishap trying to land on the shore. He was one of the best.
Don Dusatko
Seagull 3
Wing area: 240 sq. ft
Single surface
Nose angle: 90 deg
Glide ratio: 23 - 24:1
Seagull IIIZ
Leading edge: 17 ft
Keel length: 15 ft
Wing span: 26.6 ft
Wing area: 178 sq,ft
Aspect ratio: 3.98
Nose angle: 102˚
Sail billow: 2.5˚
Weight: 36 lb
Pilot weight: 80-145 lb
Takeoff speed: 12 mph
Stall speed: 14 mph
Max speed: 35 mph
Best glide ratio (L/D): 5.5-1
Best L/D speed: 20 mph
Min sink: 320 fpm
Seagull IIIZ
Leading edge: 19 ft
Keel length: 17 ft
Wing span: 29.5 ft
Wing area: 223 sq,ft
Aspect ratio: 3.89
Nose angle: 102˚
Sail billow: 2.5˚
Weight: 40 lb
Pilot weight: 135-200 lb
Takeoff speed: 12 mph
Stall speed: 14 mph
Max speed: 35 mph
Best glide ratio (L/D): 5.5-1
Best L/D speed: 20 mph
Min sink: 320 fpm
Seagull IV 19x17
Leading edge: 19 ft
Keel length: 17 ft
Wing span: 29.5 ft
Wing area: 174 sq,ft
Aspect ratio: 5.0
Nose angle: 102˚
Sail billow: 2˚
Weight: 42 lb
Pilot weight: 130-175 lb
Takeoff speed: 14 mph
Stall speed: 17 mph
Max speed: 45 mph
Best glide ratio (L/D): 6.5-1
Best L/D speed: 22 mph
Min sink: 270 fpm
Seagull VII
Leading edge: 19 ft
Keel length: 11 ft
Wing span: 31.4 ft
Wing area: 161.1 sq,ft
Aspect ratio: 6.13
Nose angle: 110˚
Sail billow: 0˚
Weight: 46 lb
Pilot weight: 130-165 lb
Takeoff speed: 12 mph
Stall speed: 16 mph
Max speed: 50 mph
Best glide ratio (L/D): 8.5-1
Best L/D speed: 24 mph
Min sink: 237 fpm
Seagull VII
Leading edge: 20 ft
Keel length: 12 ft
Wing span: 33 ft
Wing area: 184.9 sq,ft
Aspect ratio: 5.89
Nose angle: 110˚
Sail billow: 0˚
Weight: 48 lb
Pilot weight: 155-220 lb
Takeoff speed: 12 mph
Stall speed: 16 mph
Max speed: 50 mph
Best glide ratio (L/D): 8.5-1
Best L/D speed: 24 mph
Min sink: 234 fpm
![]() Seagull IIIZ
![]() Seagull IV
![]() Seagull VII
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