Yann's Techno Toys Blog
Yann's Planes
Hobby Picture Gallery
Bertrand's Site
E-Flight Links
Planes
PMAV
Engine Sound Synth
Naboo Cruiser
A.D.V.E.R.S.E.
NanoMate
NanoSaucer
X-15
TurboWraith
Horreur 4
Drenalyns/PacMan
Zepron FunFly
PicoSpit
R/C AirHog
Horreur
Delta Depron
Techniques
Depron/Zepron
Minicam
Battery Data
Motor Data
Galleries
Lots of Planes
Failures
Huge Picture Gallery
yann.lecun.com
lecun.org
Download the DjVu Plugin
DjVu
L'Horreur: The All-Depron Fun Fly

L'Horreur is an all Depron/carbon Speed400-powered "FunFly" with a huge wing area and undercambered airfoil for maximum lift. The wing is a single 3mm Depron sheet folded over a few ribs (made of 6mm depron) glued on a 6mm carbon tube spar. The leading edge of the wing is covered with thin and wide tape to prevent breakage when folding the Depron sheet. The fuselage is made of three 6mm depron sheets sandwiching a carbon tube.

This plane can fly incredibly slowly, yet can loop and roll at unreal rates. It can hover, climb vertically and land vertically in 5 knots of head wind.

  • Designers/Construction: Bertrand and Yann Le Cun
  • Design: particularly ugly and unrefined.
  • Wingspan: 1000mm; chord: 360mm (including 60mm full-span ailerons)
  • Length: 900mm
  • Mass: about 600g all included
  • Motor: Speed 400 with 4:1 gear and 11-8 (28-20) Graupner folding prop
  • Battery: 7 cells 500mAh NiCd
  • Radio: standard 3 channels with mini-servos

Yann's brother Bertrand holding the "Horreur".
This wing generates enough lift for the plane to hover in 5 knots of wind.
the clear plastic ring cut from a water bottle prevents the folding prop from getting stuck folded on the flat fuselage

RealVideo Movie
(Modem Quality)
Download (454KB)
Hi Quality MPEG Movie
Download (23MB)

Send comments and questions to Yann: .