stupid prop question
 

Is there a propper way to put on a prop to minimize vibration, I mean with it at 1 oclock with the engine at the compresion stroke...or can you just screw it on anyway lol

RE: stupid prop question
 

There's a slim chance that it will run smoother in a certain position

I always just make them horizontal when coming up on the compression stroke

RE: stupid prop question
 

I make them horizontal on the compression stroke. I figure they stay out of the way during a possible dead stick landing that way.

RE: stupid prop question
 

On one gasser, I noticed that vibrations were reduced GREATLY when the cylinder was at TDC with the prop horizontal to the motor.

The prop I used was fully balanced too.

As a result of the above I've taken to doing the same with my other engines.

I've also seen this suggested on other threads... but your results may vary.

RE: stupid prop question
 

On glow engines you may find that the engine runs smoother when the heavy blade of the prop is aligned with the crankshaft counter balance.

RE: stupid prop question
 

Interesting... for my own edification, what is the logic behind this?

That the cylinder side is effectively heavier without the prop?

RE: stupid prop question
 

Most engines (2C glow) could use additional counter balance weight. I seldom balance small props, but just determine if one blade is heavier with a very simple balance.

RE: stupid prop question
 

Dittos to what high plains said.[8D]

I can confirm possibly not exactly the same but with the small general aviation engine the Continental C-85 typical of Cubs, airnockers and Ercoupes etc. that there are six possible propellor/crankshaft orientations possible due to the bolt pattern. When the McCauley metal prop is used one of those positions there will be a very noticible vibration in flight and it can be eliminated simply by rotating the prop to any of the other five positions.

John