X-21 v-tail - Introduction

X-21 F3B sailplane

Model made for flying in the F3B, F3F and F3J categories. The model is made in fullcarbon version, which can withstand more stress. The F3J version of the model is lighter. The flying performance suits beginner F3x pilots also.

end production Eagle F3B sailplane

X-21 v-tail - Details

X-21 F3B sailplane
Category: F3B,F3F,F3J
Conception: Two part wing, two part elevator, V-tail
Wing span: 3200 mm
Length: 1540 mm
Wing area: 60,4 dm2
Elevator area: 6,2 dm2
Wing airfoil: MH 32 mod
Elevator airfoil: SD8025
Weight: from 2100 g as F3J
Ballast: 1600g
Maximum servo width: wingr: 13 mm ,fuselage: 15 mm
Construction:
Wing glass-balsa-glass, carbon-herex-glass or carbon-herex-carbon
Spar UMS Carbon
Tailplane glass-balsa-glass
Fuselage carbon-glass

Drawing

X-21 v-tail - Settings

X-21 F3B sailplane

Settings table for Eagle

Trim positions Flaps Ailreons Elevator Rudder
Normal 0 0 1 0
Termik 2 in line with flap 0,5 0
Speed 2 in line with flap 1 0
Start 12 3 0 0
Butterfly max down 5 3 0
Deflections Flaps Ailreons Elevator Rudder
Normal 0 9/4,5
(on tip)
5/6 7/8
(on tip)
Termic 0 6/4 5/6 7/8
(on tip)
Speed 50%/50%
(% of ailreon)
13/5
(on tip)
5/6 0/0
Start 0 8/4
(on tip)
7/8 8/9
Butterfly 0 9/4,5
(on tip)
5/6 7/8
Towhook: 128 mm from end of cabin.
Center of gravity: from the leading edge 101-103 mm
up deflection/down deflection

X-21 v-tail - Pictures

X-21 F3B sailplane

Model and details

X-21 x-tail - Prices

X-21 F3B sailplane

Pricelist, model versions and order

Model version
X-21 v-tail Price Note
GFK 820,- GFK- glass version
CFK 930,- CFK- carbon version
double-carbon 1060,- Carbon - most robust carbon version (carbon-herex-carbon).
X-21 x-tail    
GFK 840,- GFK- glass version
CFK 950,- CFK- carbon version
double-carbon 1070,- Carbon - most robust carbon version (carbon-herex-carbon).
X-21 GFK model parts    
fuselage 160,-  
wing 570,-  
v-tail 95,-  
CFK joiner 35,-  
X-21 CFK model parts    
fuselage 170,-  
wing 670,-  
v-tail 95,-  
CFK joiner 35,-  
All prices are in Euro and valid for 2009, excluding transport and tax. To order, using e-mail adress: jitom@jitom.com
Desing and Programing: Michal Michna - 2009
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