Gnumpf-X (oz12453)


Gnumpf-X (oz12453) by Timo Starkloff 2006 - plan thumbnail

About this Plan

Gnumpf-X. Radio control sport model.

Wingspan 101 cm.

Note plan shows parts at fullsize, and general layout at 50% scale.

Note this plan is freely available online (see datafile), since it was shared by the designer himself.

Quote: "I put two of my plans on Dropbox for free download (for private use, not commercial). In times of Corona the best thing to do is stay at home and build another model.

The first plan is for the Gnumpf-X, a model designed in 2006 for pylon racing but due to perfect flying characteristics also suitable for fun flying or just running in of new ic engines (free motor mount means good cooling). Two airfoils are possible, I would recommend SD6060. Faster than the 8052 but as easy to fly.

In case you don't have thin plywood available for the fuselage, 3 to 5 mm balsa will do the job as well. You just have to change the frames to a bigger cutout.

In Germany there still is a small pylon class where the Gnumpf-X and similar models are flown at speeds from 180 to 250 kmh at low height for four minutes around a tight and short course. The models are powered by up to .32 ic or electric engines. The complete equipment is standard material and therefore very cheap. Only the unlimited class take these stock motors and beef them up a bit. See

Best regards, have fun building and flying and stay healthy, Timo"

Supplementary file notes


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Gnumpf-X (oz12453) by Timo Starkloff 2006 - model pic


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Download File(s):
  • Gnumpf-X (oz12453)
  • Plan File Filesize: 1305KB Filename: Gnumpf-X_oz12453.pdf
  • Supplement Filesize: 629KB Filename: Gnumpf-X_oz12453_instructions.pdf
  • CAD Zip Filesize: 69KB Filename:
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