HPK SP-1

HPK SP-1
Role Homebuilt aircraft
National origin United States of America
Manufacturer HPK Aircraft Associates, a division of Engle Flying Service, Inc.
Designer Harold Hayden, Art Payne, Robert Kinney, Norman R. Benner
First flight 23 August 1957
Introduction 1957
Number built 1


The HPK SP-1 aka "Some Pisser-1" is a single seat homebuilt aircraft.[1]

Design and development

Engle Flying Service members, Harold Hayden, Art Payne, Robert Kinney, and Norman R. Benner developed the HPK SP-1 over the course of five years. Plans for a two seat side by side, and four seat variants were not completed.[2]

The SP-1 is a single-place, all-metal, low-wing aircraft with conventional landing gear and partial span split trailing edge flaps. The cowling is from a Piper Tri-Pacer.[3]

Operational history

The aircraft was built and tested at Three-M airfield in Pennsylvania, home of Kaiser-Fleetwings Company.[4] The prototype has been registered for over 50 years.[5]

Specifications (HPK SP-1)

Data from sport aviation

General characteristics

Performance


References

  1. "Abandoned & Little-Known Airfields: Pennsylvania - Northeastern Philadelphia area". Retrieved 17 June 2011.
  2. Sport Aviation. February 1959. Missing or empty |title= (help)
  3. Frederick Thomas Jane. Jane's all the world's aircraft.
  4. "Abandoned and little know airfileds". Retrieved 17 June 2011.
  5. "N65X". Retrieved 17 June 2011.