| > It seems to me that, if the prop is properly balanced, it wouldn't | > induce any vibration no matter how it was oriented. However, I know | > that on a glow engine the power is not smoothly applied and has some | > "bumps" in it so I'm open to discussion on the topic. | >
| > Any idea? Preferences? Explanations? | >
| > Thanks, | > Steve | >
| | | I began flying models via control line. When flying control line, the good | thing to do is to align the prop horizontally when the engine is up against | compression. That keeps the prop up and out of the way when landing. Old | habits die hard. | | Many years ago, I did used to know a trick about where to put the heavy | blade in order to help balance out the heavy piston and connecting rod. But | now I forget what it is. Back then, no one balanced props that I knew. | | Ed Cregger | |
Hope I don't have this backward. A lot of engines are made where the counterbalance on the crankshaft does not completely balance out the piston and connecting rod. So, the prop should be installed with the heavy end down when the piston is top dead center. Does this jog your memory?
In practice, I also balance the prop and install it so that it is horizontal when bumping against compression. Control line flying and some years of experience of running Fox engines on R/C planes has saved a lot of props.