History Takes Flight

With a collection of more than 200 historic aircraft, the EAA Aviation Museum is a year-round destination, combining aviation's past with the promise of its exciting future.

Helisoar/du Pont HP-10 - N319Y

Location: Pioneer Airport

The HP-10 was designed by Richard Schreder and made its first flight in 1961. Richard designed the sailplane to give a low sink rate and still allow high speed travel. The HP-10 was supplied as a kit to be built by the customer.

Extremely clean, the HP-10’s long wing was constructed of eight aluminum honeycomb-sandwich panels and presented an aspect ratio of 20.6. The 32 foot flap span gave reduced sink while permitting high speed and acting as a dive brake. The fuselage was all metal, and the craft landed and took off on its single wheel.

The HP-10 was usually towed aloft by another airplane to about 2000 feet, where the sailplane was released. By seeking out rising columns of air, a pilot could stay aloft in the sailplane all day, travel hundreds of miles, and attain nearly 35,000 feet of altitude.

Stephen du Pont built his own HP-10 sailplane, which he donated to the EAA AirVenture Museum in 1968.

Wing Span

48 ft.


21 ft. 11 in.

Wing Area

114 sq. ft.


28.5 in.

Maximum Speed

150 mph

Stall Speed

38 mph

Empty Weight

475 lbs.

Gross Weight

875 lbs.

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