Hi All,
In theory, yes, in practice, no.
You can weigh the blades on two scales, one at each end, to get matching end
weights,
as you would do when balancing a con rod [ and thus matching total weight]
but trimming off a few grams in the same place on all three blades,it isn't
going to be that far out anyway.
On my F2A control line speed model, I have a ONE BLADE prop, with a lead
counter
balance held captive in a steel housing, on a good day that runs at 39,000
RPM.............
Cheers,
Nev.
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Graham
Singleton
Subject: Europa-List: Warp Drive blades
>Use a digital scale to check individual blade weights, Warp Drive supply
>them within
>0.5 gram, no reason not to get to 0.2 if your scales read that small ?
Remember though, the position of the CG of the blade is just as important.
If it is not identical on each blade the prop won't balance,even if the
blade weights are identical.
There is a way to check but it needs a special jig which pivots the blade
at a position relative to the axis of the prop, then weigh and record the
weight at a position roughly (it isn't critical) 60% diameter. That is what
must be identical for a dynamically balanced prop.
If you have an Arplast, there is hole down the middle of the blade for
adding lead to adjust dynamic balance.
Flying behind a well balanced prop, and spinner! is a revelation. If you
ever get offered a ride in our Chairman's Europa you will be amazed..
Graham
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