This way the inertia of the prop changing direction on the shaft will tighten the nut as it swings. When reversing an engine from it's original direction it's not the worst idea to safety wire the prop nut to the prop. Happened to me on an old Cox control line piper Comanche. 049 cox engines with spring starters can tell you once the ignition plate gets a little worn it is an occasional hazard that the prop kicks back and the engine starts running poorly the other way. There are also engines like the Super tiger which you can reverse direction by rotating the output or prop shaft casing (I assume because they are internally gear driven off the crank).Īnybody who has ever had more than a few runs on the old. There used to be kits to reverse direction of old OS engines for use in pusher applications. Real Boats do it all the time with chevy 350s. On a 4 stroke, you have to have a new cam made in mirror image to the original cam and then change the ignition timing. Rotary valve 2 strokes cannot be reversed. Of course you still have the issue of the threads on the prop shaft now spinning the nut loose. Nylock are fine for small stuff but larger stuff should use the correct threading or some other attachment method that is not rotation sensitive like a collet, keyway, or direct mountĬlick to expand.not to be that pedantic wonk but.if you have a piston port 2 stroke with symmetrical ports it's actually as easy as reversing the ignition timing. This is much more important for RC plane gas motors because they cannot be made to run backwards. When a "Reverse" aka "Pusher" prop is used as a pusher the motor turned to face back and the Reverse (aka Pusher) prop is reversed to face forward allowing the use of a normal CW (aka right handed) thread to self tighten. "Reverse" props as used by a counter rotating twin (ie mounted on the front of the plane) would be CW rotation with a CCW (aka left handed) thread to self tighten. This is the standard setup for all single front motor RC planes "Normal" props are CCW rotation requiring a normal CW (aka right handed) thread on the shaft to self tighten. The reason for this is, probably, is that CW (aka right handed) threads are normal so its just easier. RC planes are viewed from the front looking back. Click to expand.That is not the general convention for RC plane.
0 Comments
Leave a Reply. |