Operation manual
3W Modellmotoren GmbH, Hasswiesenstrasse 22, 63322 Rödermark
www.3w-modellmotoren.de
© Copyright Qualitätsmanagement 3W, Revision 2, Page 9 from 19, valid from 22.02.2013
Important:
This exit area needs to be four times (4x) as large as the intake area.
Propellers
•
Only use propeller brands and sizes that are approved for your engine
•
The propeller blades must be of the same length
•
The propeller must be flat (You can check for flatness by putting the propeller on a level
surface. The maximum difference of the blade heights should be no more than 1/64".)
•
The propeller tips must have an identical shape. This is especially important when using
3 or 4 blade propellers.
•
You must use a drill press to drill your propeller.
•
You must drill the propeller from the rear.
•
A drill guide is recommended, but the propeller washer can be used as a drill template. (Fix
the propeller washer onto the propeller in the center-bore using a bolt and nut. Drill one
hole; put one of the propeller bolts into the hole. Continue until the last bolt is used.)
•
If you cannot hand tighten all of your prop bolts easily then you have not drilled the propeller
correctly. This can lead to sheared propeller bolts.
•
Balancing your propeller is absolutely critical to the health of your engine. You must keep
your propeller balanced. (Propeller balancers are available from DUBRO, and others.)
•
Always remember that when the engine is running every person must stay behind the line
of the rotating propeller; never to the side or the front!
Carburetor settings
Before each engine is shipped it has to pass QC and is then test run. We do a basic adjustment
of the carburetor needles at that point.
highspeed needle H:
1
low speed needle L:
1
