Carf-Models Composite-ARF Extra 330L Instruction Manual page 26

Composite-ARF Extra 330L (2 x 2m)
techsupport@composite-arf.com
2mm thick C-ARF carbon motor mount, with the
standard fibreglass circular plate that is supplied
with the motor sandwiched underneath it, using
the four M3 bolts supplied with the motor. The
whole assembly is then fitted to the front face of
the front bulkhead with four M4 bolts, which pass
though the plastic grommets with a 2mm thick
carbon washer either side (included in the Elec-
option pack), into M4 blind nuts.
Note: The front bulkhead must be glued in the
fuselage with approx. correct 3° sidethrust.
The rear of the motor fits tightly into the 3mm Hacker 50
milled plywood plate with the 3 'ears' for thrust- bulkhead assembly
line adjustment, and this is secured onto the
back face of the middle carbon/ply bulkhead
with three M3 bolts and blind nuts. This middle
bulkhead is fitted perpendicular to the centreline
of the fuselage - not at the sidethrust angle.
Adjustment of the position of the holes in the 3
ears of this ply part allows fine tuning of the side-
thrust and up/down thrust, although this is
already set approximately by the position of the
front carbon/ply bulkhead. The back bulkhead is
also fitted perpendicular to the fuselage centre-
line, and it's position is not critical - just set it for
your battery mounting.
Don't forget to add a drop of Loctite on all the
front and rear engine mounting bolts !
The middle and back bulkheads already have
rectangular cut-outs (50mm x 85mm) for typical
sized flight batteries and these can be adjusted
for your battery choice.
Note: All Hacker bulkheads are marked with a
milled 'H'.
The batteries are supported on a pair of 10mmØ
carbon tubes (included), which has a sheet of
composite foam-board CA'd onto it, and retained
with double-sided velcro straps provided. At the
front of the tubes you just slide on the
carbon/plywood part supplied to stop the batter-
ies moving forward in flight, and secure with the
Velcro. The carbon/ply part for the back is glued
onto the carbon tubes permanently. The batter-
ies are inserted from the front, by removing the
cowling. The photo showing the parts assem-
bled outside the model should make construc-
tion clear.
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