Prop (Propeller) Balancing for Gas RC planes - 30cc 25% 3d gas planes

[TOPHAT1966GS]

The other part you did not mention is that there are 3 steps in balancing a prop. 1 balance it laterally. 2 balance the hub. 3 balance the plain in which the blades are traveling on...rarely mentioned this is done by measuring at the tips and rotating the prop which measures wobble at the tips. This is where one blade travels in front and or behind the other and not on the same plain or location which induces vibration. Hope this helps.

[TOPHAT1966GS]

One thing you didn't mention about balancing a prop is the following. You can measure the thickness of the hub from top to bottom and side to side to see if it was drilled off center by the manufacturer and if so you can then correct this by reaming out the prop for your crankshaft to compensate for the deviation at the hub basically re-centering the hole. Depending on how far off it is you may need to glue a dowel filling in the whole in the prop and starting from scratch.

[jkrpec1974]

I need help with my 27*10.the hub got me

[trpastor]

I usually let them touch for that reason. They don't want extra friction from what i understand, but I think if you allow it to BARELY touch, then you have minimal friction and it should still give you a good idea of balance.

[williebuilt72]

Excellent explanation re how and why the need for balancing the prop. It appears from the sound rod holding the prop is wedged between the two magnets. The directions with my Top-Flite balancer says not to allow both ends of the rod to contact the magnets.....only one end.

This allows one end of the rod to "sag or drop". The amount of sag affects the prop's resting position/balance . I modified my fixture to give best possible horizontal postion using the magnet attraction..

Comments?

[robotheater]

Very Nice Job! Thanks, you made it simple to understand and works like a charm!

[BOOSTOMAN]

hi,

I used tape to balance my 18x8 prop and made sure there was no bubble when the tape was stuck, i tested the prop on the engine stand and your right the vibration was reduced alot.

my question is that can i used tape and not use glue, becuase I feel glue would be very messy and a lot more difficult to work with.

[j022749]

is it better to balance before adding the bolt circle or after?

[trpastor]

Hey Gewizz - sorry, I've never worked with Pushers, so I can't give you a solid answer on that

[gewizz2]

ive just purchased a new prop 4 my easystar plane , its a "pusher plane" and am concerned that i have now got a "puller prop" on it?

is there a diference between props that pull and push?

and i assume that the thin sharper part of the prop never goes into the wind?

understand me? ne1