We're talking Speed here. At a line length of 17.69 meters 9 laps equal 1 Kilometer. Speed is checked by 3 timekeepers.
The airplanes have high aspect ratio inboard wings and outboard tailplanes only to minimize drag. One blade propellers are popular because they are more efficient. Models are launched from a dolly.
|High performance engines with 2,5 ccm capacity for the International class. If they don't turn at least 40000 RPM they are considered trash.. Top speeds are around 300 km/h !!!|
|Tuned pipes raise engine power quite drastically - if they are perfectly tuned to resonance. Flyers would like to add some hot but prohibited incredients, so official standard fuel is provided by the contest organizer.|
|For the pilots aerodynamics is measured in RPM only. During the flight the pilot is forced to put his hand into a fork of the pylon to prevent unlawful whipping. To circle the pylon 9 times within less than 12 seconds is frightening - that's real sport !|