The box which A&C used just tells you where to put the weights (angle relative to the “top” prop blade – the one which had the optical reflector tape on it) and how many grams each should be.
You also first tell it the angles at which there are existing holes (from previous balancing attempts) in the prop flange, so one doesn’t end up with a flange full of holes.
There is no reason to fit stuff different to what the machine says it should be, but for some reason one often needs 1 more iteration.
The big thing I found was that the prop had to have oil in it, as if for going flying. Also the little scale which comes with the balancer kit (for weighing the bolts and washers) must be on an accurately horizontal surface (not on a wing, which is where everybody puts it) 
Using the Dynavibe Classic, I have found the android app “Triangle Calculator” a useful aid instead having to plot accurately on a polar chart.
The day out at Shoreham was a bit of a learning curve, I was asked to Balance both Peter & Rami’s aircraft.
It’s the first time I have worked off site and not had everything set up in the hangar before we started, it became apparent that working on the top of the wing was not a good idea as it set up errors in the weighting of the balance weights and probably resulted in an extra run before we got the optimum balance solution.
The one thing that both Peter & Rami have noticed is a marked reduction in vibration, the next aircraft I am going to look at is a DA42 that is regularly cracking exhaust pipes. If the exhaust cracking is a vibration issue this could save the owner a considerable amount of money.
A_and_C wrote:
The day out at Shoreham was a bit of a learning curve, I was asked to Balance both Peter & Rami’s aircraft.It’s the first time I have worked off site and not had everything set up in the hangar before we started, it became apparent that working on the top of the wing was not a good idea as it set up errors in the weighting of the balance weights and probably resulted in an extra run before we got the optimum balance solution.
The one thing that both Peter & Rami have noticed is a marked reduction in vibration, the next aircraft I am going to look at is a DA42 that is regularly cracking exhaust pipes. If the exhaust cracking is a vibration issue this could save the owner a considerable amount of money.
Thank you very much – there was a significant reduction in vibrations since the dynamic prop balance for N219RT. And thanks as well for coming all the way to EGKA!
