Wood Sky Pup | |
---|---|
Role | Ultralight aircraft |
National origin | United States |
Designer | Stephen K. Wood |
First flight | 1980 |
Introduction | 1982 |
Status | Plans available |
Produced | 1982-present |
Number built | 350 |
The Wood Sky Pup is an American single-seat, high wing, cantilever, single engine, conventional landing gear ultralight aircraft that was designed by Stephen K. Wood [1] of Whitewater, Colorado for amateur construction. [2] [3] [4] [5] [6] [7]
Introduced in 1982, the Sky Pup is a single seater designed as an FAR 103 Ultralight Vehicles compliant aircraft with an empty weight within that category's 254 lb (115 kg) empty weight limit. The aircraft was intended to require the minimum financial investment and the designer intended that the airframe would be able to be completed for US$1000 using locally available materials. Cliche reported in 2001 that Sky Pups had been completed for US$2000, including the engine. [2] [3] Its shape has been described as imitating the 1930s Aeronca C-2 "flying bathtub".
The airframe is constructed from Douglas fir and styrofoam, all covered in Dacron or polyester fabric. The wing is a three-piece design, allowing quick disassembly for transport or storage. The landing gear suspension is made from maple wood. The Sky Pup can be built with an open cockpit or fully enclosed, allowing flying in cooler weather. The Sky Pup is available as plans only. The power range specified is 18 to 28 hp (13 to 21 kW), with the largest engine specified the 28 hp (21 kW) Rotax 277. The 20 hp (15 kW) 2si 215, 28 hp (21 kW) Hirth F-33 and 22 hp (16 kW) Zenoah G-25 have also been used. [2] [3] [4] [8]
The design was professionally engineered and incorporates a very clean cantilever wing that results in a 12:1 glide ratio. The control system is two-axis, using only elevator and rudder controls, roll being introduced by rudder via a generous dihedral angle. The elevator is stick-controlled, while the rudder is controlled via conventional aircraft pedals. The aircraft is stall and spin proof. Reported construction times are 450–600 hours. [2] [3]
Plans were initially sold direct by the designer and, in the early 2000s, by the Vintage Ultra and Lightplane Association. Later the designer's son marketed the plans and this is the current source. [2] [3] [5] [6] [7]
Data from Brochure, Cliche, and Kitplanes [1] [2] [5] [6] [7]
General characteristics
Performance
Related development
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