The following procedures is a non-brand specific guide to install your particular engine. This by
no means is the ONLY way NOR does it apply to all engines across the board. This is simply
one user’s general approach, written for you information only.
General Guideline for Installation of Radial-Mount Engine:
Doc. No.# AW70-105-01, Rev. 3 Copy Right 2006, AirWild Hobbies, Inc.
Page 8
1. Determine the full length of your engine, from
base of engine mount to the prop hub. Let’s call
this dimension X. For the purpose of discussion
we use DA50-R’s dimension for illustration.
2. Now refer to the “dimensional reference – engine
installation” in the previous section, take the
Diagonal Distance (170.25 mm) and subtract X
from it.
Y = 170.25mm – X
3. Dimension Y is the thickness of spacer you need to fabricate to position the engine for the
proper clearance. Use a 3/4” ~ 1” wooden dowel which you can easily find at your local
hardware supply, ie. Home Depot, and then cut to length.
STAND-OFF FABRICATION
Cut dowel to the desired length. Make sure they are all of even length. Use a drill press to do the next step.
Drill a center hole of the appropriate diameter for the engine mounting bolt to run through the dowel. Next,
saturate the through hole and two ends of the dowel with thin CA.
Harden with CA Kicker.
This will
prevent the dowel from splitting under pressure. Repeat same steps to fabricate the remaining pieces.
4. Next you need to locate and drill the mounting pattern for your radial-mount engine. A set
of offset center lines has been laser scored onto the front of firewall. Refer to your engine
manual in conjunction with the center line references to locate the bolt pattern. Drill and
mount your engine accordingly.
DA50-R Engine Installation Guide
1. Make sure your DA aluminum stand-offs is the standard-size, 2.5” set.
2. Fabricate four (4) 0.25” (6.35mm) thick spacers out of 5-layer, 0.25” thick plywood.
3. Install spacer between stand-off and fire wall.