Ed Fisher, Raceair Designs, Hirth F33 powered Zipster experimental light sport and ultralight aircraft.

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Raceair Designs F 33 Hirth powered Zipster

Ed Fisher was at Airventure in the Hirth booth with his award winning Grand Champion ultralight bi-plane the Zipster powered by a Hirth F 33 single cylinder engine.

The engine was just installed on the Zipster in the early part of July 2005.

According to Ed the engine runs very smooth even at an idle, and performance matches that of the Rotax 277. Ed redesigned the Zipster at the request of some EAA members who wanted to be able to use a new, warrantied, off the shelf production engine that was readily available.

The Zipster features a lot of the design features of the Micro Mong, Zippy Sport and Skylite including the swept tail and swept back wing tips. When equipped with the Hirth F 33 engine the Zipster is a legal part 103 ultralight in the U.S., weighing in at 249 lbs complete with wheel pants.

For those wanting more performance in the experimental category the Zipster is capable of handling the Rotax 503 or equivalent Hirth engines.

Ed is offering a detailed set of construction drawings and construction manual for building of the plane from raw materials. A video on building the Zipster should be available by the fall of 2005.

Raceair is currently tooling up for production of pre-welded fuselage, tail assemblies, and pre-bent landing gear. Raw materials kits are currently available for wing ribs.

First time builders can expect to spend roughly 1100 man hours to build their Zipster. The fuselage and tail section are 4130 chromoly steel tubing. The wings are standard tube and ladder construction with a 2 1/4 inch front spar and 1 3/4 rear spar. The wing ribs are aluminum angle using the "Raceair Widget rib design."

When up and flying using the Hirth F 33 engine builder can expect their craft to be airborne in about 200 feet, climb out at around 400 feet per minute and cruise along all day at 55 to 60 mph at 5800 rpm burning approximately 2 gallons of fuel per hour. Stall speed comes in at around 26 mph, with plenty of warning prior to it getting to stall.

For more information contact:
Raceair Designs
4387 Sunnybrook Dr.
Warrent Ohio 44484

Raceair Designs Hirth F33 powered Zipster experimental light sport and ultralight aircraft.

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