CARF-Models Sukhoi SU-31
16
Engine
The Sukhoi has been set up for a
DA-200 4 cylinder engine. If you
choose to use a twin you will need to
install the optional firewall included
with your kit, or use standoffs. We
will show you the DA-200 installation.
Start by covering the plywood firewall
with masking tape. Use the fuselage
molding lines as a guide and mark
the center line on the firewall. The
Sukhoi requires 3 degrees of right
thrust so you will need to offset the
center line 5 mm to the right as
shown. Next you need to locate the
horizontal center line. Tape a
straight edge to the top of the fuse, in
the area right in front of the canopy
frame. Make sure it stays flat
against the fuse. Use a ruler to
measure down from bottom of the
straight edge 8 1/4” (21cm). This is
the horizontal center line location.
Use a square and mark the
horizontal center line on the firewall.
Next you need to mark the location
for the engine bolts. Use a square
on the center lines to ensure the
lines are parallel. Measure from the
offset center line. Use the photo as
a guide for the hole locations. We
used a 3 degree offset mount from
SWB on our SU-31. You can use
washers if a mount is not available.
After you fly your Sukhoi you may
find a slight thrust adjustment is
necessary, this can be done with
shims under the engine mounting
plate.