TECHNICAL DESCRIPTION, OPERATING, MAINTENANCE AND REPAIR MANUAL
The given mixing proportion of components must be observed as exactly as possible.
Mixture of a resin and a hardener must be stirred thoroughly until there are no cloudiness
and no bubbles in a vessel. The thickeners and the resin-fillers are added after stirring.
The hardening of the mixture is 15 hours at a temperature 55 °C. The mixture reaches
final properties after this time.
Reinforcements:
Glass clothes
INTERGLAS
Style
Weave
Weight
g/m
2
Application
91110 Crosstwill 110 Inner skins
92110 Crosstwill 163 Fuselage, wing, control
surfaces
92125 Crosstwill 285 Fuselage, wing
92145 Unidirectional 216 Fuselage, wing
Carbon clothes
98140 CF 200 Cloth 200 Fuselage
CF 140 Unidirectional 140 Fuselage, stabilizer
Rovings
Carbon : TENAX HTA 5131
Glass : EC9-756 K43
Foams : HEREX C.70.55
Resin - Fillers : Aerosil, Chopped cotton wool, Microballoons
white
Lacquer : Acryl
Steel :
L-CM3.6 ( AISI 4130, DIN 1.7214.4 )
Light metals : Duralumin Z 424203.61 ( ASM 2024 )
4.5 Repair preparation
You should first inspect the damaged area to determine exactly the extent of damage,
type of construction and type and density of weave concerning to main dimensions of the
part. The aeroplane WT-9 Dynamic has the first layer of the sandwich outer layers from
the 92110 cloth with 45 ° diagonal weave direction to the fuselage centre line or to the
wing centre line. The first step is removing all damage parts and all portion of the shell
which has become delaminated from a damage area. A repair area should be washed with
a soap and dried up. Then clean a repair area with carbon tetrachloride or acetone.
Prepare clean vessels for stirring the mixtures of a resin and a hardener.
Date: 01.03.2002 WT-9 Dynamic Section 4 Page 4 - 3
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