New World Speed Record powered by Scorpion Motor


"Hayabusa", designed and built by Stefan Penz, is one of the fastest Hotliners on the world - and it is powered by a very special scorpion motor.

© Dr. Ralph Okon 03082008

This is the first prototype version, powered by a 4010 with plates and magnets from scorpion systems.
Its speed was about 350-370km/h.

The parts of the improved second version of Hayabusa at the Dauchau 2008 speed event.

Ready for the next flight.

Stefan starts his model.

Hayabusa in flight.

Slow down before landing.

The first 3016 motor. Statorplates and magnets came from scorpion and have been built in into a customized housing.

The complete drive section with the 7x10 cfk-propeller before building in.

Drive section inside the body.

The 3520 motor has a housing made by scorpion, too.
Its weight is 231g and it is able to use about 3,3kW avarage for 20 seconds without burning down.
The peak in speed flight is about 250Amps for 1 second.

Stefan was the winner of Dachau contest with 383,8km/h maximum speed and 365km/h average in both directions.
A small flight video you can find here.

This is Stefans winner cup of Osnabru"ck 2008 speed contest.
The average speed in both directions was 394km/h.

The next contest will be at the end of September: the German Masters F3S in Neumagen.
All conditions are fulfilled to get a new official speed record there.
May be it is Stefan or may be one of his concurrents - but it seems, more than 400km/h will be needed to win this contest!

This is a view on the onboard speed sensor used in training.

And this ist the best speed log, made in training.
Top speed was 423km/h.
Btw. the official FAI world record in the electric class is 361km/h ....

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