Newbie Qs 2 replacing propellers from spares

[Grazuncle]

Well it had to happen.. splintered two of the propeller blades

Found out how to replace them watching for A and B signs. However when looking at the ones already on but splintered they were marked A9.. the only A's in the pack were A10. (I put a pair of A10's on)

Also the B's were B12..

This may well be in order but expected identical numbers at least.. (not the A or B obviously) Thoughts?

 

[DoomMeister]

Nothing to worry about! What matters is that A and B are paired A-A on an A motor, and B-B on a B motor. The numbers are a marking for Quality Control and refer to the cavity number on the injection mold die. It is probably advisable to match numbers (two B12’s or two A7’s on a motor) in case the cavities are not quite equal in weight and balance. This helps ensure that you have equal weight on each side of the motor to reduce vibration.

 

[Grazuncle]

Knowledge is king!

That's very reassuring..

Grateful, thanks.. Again..

 

[Peter b]

He definitely has the knowledge!! If you only broke a few props then I want a lesson. let's say I have some extras.