Questions and answers related to the GP-4

Why not just buy a certified airplane (Cessna, Piper, etc.)?

Building and flying a homebuilt airplane is an extremely rewarding experience, and is a great chance to develop new skills. Depending on your taste, building an experimental airplane can be less expensive to own and operate. However, if you like having a plane just like everyone else at the airport, or don't want to be worried about maintenance and repair then buying a certified plane is probably a better choice.

Why the Osprey GP-4?

Most people recommend that you develop a "mission profile" before buying or building a plane. The idea is to know exactly what you want a plane for, and then find a model that suits your needs. I wanted to homebuild a plane, the primary material had to be wood, I wanted it to cruise at least 200 kts, it had to be IFR and acrobatic capable. After looking at some of the other choices (Falco, Barracuda, Celerity) the GP-4 was my top choice.

What engine are you planning to use?

I have decided to go with the designer's recommendation, the Lycoming IO-360-AIA. I am not an airplane designer, nor an engine expert. Although there are many excellent auto-conversion engines available I want to have a lot of "peace of mind" in this plane. I don't want to be cruising at 240 kts and EVER wonder if I made the right engine choice. The design of the engine cooling airflow is part of what makes this airplane so fast. The cowling is designed to fit this engine and I don't wnat to spend the time necessary playing with ducting and baffles to try and get the cooling straight on my engine.

OK, I'm intrigued, where do I get more information?

Information on the GP-4 is available from the designer's website, or you can email him at George Pereira. If you want information on homebuilding you can visit EAA. There is a "snail-mail" newsletter available from "Spud" Spornitz and an email mailing list available at GP-4 list, and of course you can email me at Ted Fontelieu

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