Various Variantes.
"Variantes" are a large family. These Horten
wings, developed by Gérard Jumelin and Jean-Yves Martin,
JMP-Team members, in fact exist under many versions (and this is not
the end yet...). Today we have :
- Variante 50 : 50 cm wingspan, 27 gram solid wing for outdoor
flying (Yes, you read right),
- Variante 60 : 60 cm wingspan, 33 gram solid or hollow wing for
indoor or outdoor flying,
- Variante 90 : 90 cm wingspan, 150 gram solid or hollow wing
for outdoor flying,
- Variante 90 with GWS EDF 50 jet engine : 170 gram hollow wing
or 180 gram solid wing,
- Variante 100 : 100 cm wingspan, 160 grams.
All these versions are described with details and
a pull-out full size plan in the Aérotech magazine (Issue
N°1 - July / August 2003). Unfortunately, this magazine is no
longer published. However the Variante 50 has been also described in
the September 2005 issue of Model Airplane News (US) and the
Variante 50 plan is available for free download on the MAN site (
http://www.modelairplanenews.com/click_trips/sep05/variante.asp
).
Only Variantes 50 and 60 are within the "less
than 50 gram" range. Variante 50 flies outdoor very well (even with
some wind) and Variante 60 flies indoor as well as outdoor.
Variante 50
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Variante 60
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Name:
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Variante 50
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Author :
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G.Jumelin - J.Y. Martin
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Type:
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Horten wing
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Wing span (mm):
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500
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Length (mm):
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175
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Wing area (dm2):
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3,2
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Mass (g):
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27
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Wing loading (g/dm2):
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8.4
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Motor:
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KP-00
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Gearbox:
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1 / 2.7
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Prop.:
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GWS EP3030
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Servos:
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Actuators JMP
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RX/ESC:
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RxCombo
JMP-France
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Battery:
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1x145 mAh Li-Poly
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Plan :
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Reduction of Variante 60
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First public performance :
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Inter-Ex
2003 (Holland)
13th September 2003
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Name:
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Variante 60
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Author :
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G.Jumelin - J.Y. Martin
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Type:
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Horten wing
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Wing span (mm):
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600
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Length (mm):
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210
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Wing area (dm2):
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4,6
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Mass (g):
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33
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Wing loading (g/dm2):
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7.1
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Motor:
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KP-00
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Gearbox:
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1 / 2.7
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Prop.:
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GWS EP3030
|
Servos:
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Actuators JMP
|
RX/ESC:
|
RxCombo
JMP-France
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Battery:
|
1x145 mAh Li-Poly
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Magazine issue:
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Aerotech
N°1- July 2003
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First public performance :
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Indoor
Meeting (Wissous)
5th January 2003
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Some few details ...
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At left, the JMP Rx-Combo with
its standard plug-in crystal, the Li-Poly cell and, under
the epoxy sheet, the KP00 motor.
At right, compensated elevons
improve the flight performances.
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Enjoy the videos of Variante 50
or of the Variante 90 with jet engine
on the Video Page !
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A variant of Variante.
During spring 2004, it was hatched a whole family
of ...swifts (a bird almost like a swallow but with narrower wings
and shorter tail) ! You have the black swift (Apus Apus) and the
Alpine swift (Apus Melba) with a white belly. The first one, in its 6
mm Depron version, weighs 22,5 grams and has a wingspan of 42 cm
(photo below). The other one weighs 30 grams, has a 52 cm wingspan
and is powered by a geared KP00 motor (as Variante) and a GWS 3''x3''
propeller (1 Li-po 145 mAh cell). See them in flight (cf. videos
below) !
Based on the same principle as the
Variantes (Horten wing), it is the latest delirium of the JMP team
!
|
The "Martinets" (French word for swift) left
their nest for the first time on June, 19th 2004 at the
ElecTrophy meeting (Boissy-sous-St Yon - 91 - France). Next
they showed up at Ostracht (Interex meeting on September,
4th & 5th 2004 in Germany) and then, leaving the good
old Europe, they made a big transatlantic migration towards
the NEAT 2004 meeting (USA).
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NEAT 2004 : Jean-Marie (Mister JMP) releases a
Martinet just before the flooding ... A swallow does not
make a summer !
(Picture taken by Kenneth Spencer on Sept., Thursday 16th
afternoon).
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INTER-EX 2004 : This bird is delicious, isn't it
Gerard ?
To see the video of the Martinet in flight at
Inter-Ex,
Click HERE !
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Good news !
The Martinets are described with all details and
a pull-out full size plan in the French magazine
"Passion'Ailes", issue #7 (December 2004).
Update : Bad news ! Unfortunately,
this magazine is no longer published
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Back to Indoor
page.
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