HPK SP-1
HPK Aircraft Associates · United States · first flew 1957 · light aircraft
The HPK SP-1, also known as Some Pisser-1, is a single-seat homebuilt aircraft. One was built.
Recognition (WEFT)
| W — Wings | Low-mounted, straight |
|---|---|
| E — Engines | 1 × piston, nose-mounted |
| F — Fuselage | 5.82 m fuselage |
| T — Tail | Conventional |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Single-seat all-metal low-wing aircraft
- Conventional landing gear with partial-span split trailing edge flaps
- Cowling taken from a Piper Tri-Pacer
Look for a small all-metal single-seat low-wing aircraft with a Tri-Pacer cowling and a Lycoming O-235 engine.
Specifications
- The HPK SP-1 has a length of 5.82 m (19 ft).
- It has a wingspan of 7.62 m (25 ft).
- Its maximum speed is 260 km/h (162 mph).
- Typical crew: 1.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
Harold Hayden, Art Payne, Robert Kinney and Norman Benner of the Engle Flying Service developed it over five years. It first flew on 23 August 1957.
Variants
Plans for a two-seat side-by-side version and a four-seat version were not completed.
Where you'll see it
It was built and tested at Three-M airfield in Pennsylvania, home of Kaiser-Fleetwings. The prototype has been registered for over 50 years.
Related aircraft
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