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Message
but the talk
of adding weight to the flywheel triggered
memory of earlier talk of
'rocking couple' on the 2 rotor engines, which if I
read correctly, is
the reason for the counterweights.
All correct as I understand it. When I
mention adding weight to the flex plate, I'm very careful to keep the balance
the same. I went so far as to weight the groups of washers and bolts that
I was adding, then mixed and matched them until I got 4 equally weighted
sets. The point of the test was to add mass, not change the
balance.
Is all of your counterweight on one end of the eshaft? If so,
could the
engine be rocking, causing the prop blades to not run
true?
On a single rotor, the
counterweights (one on each end of the shaft) have to be heavier than normal,
and they have to both be opposite of the rotor to counterbalance the weight of
the rotor.
I'm pretty confident
that there's nothing wrong with the balance of the rotating assembly.
I've run one test without the prop, which completely eliminated the prop
oscillation. That thing was steady as a rock sitting on the trailer
:-) I also got none of the 2500-3100 vibration, nor the drive
rattle at 2000. I'm going to test this one more time without a prop, then
try the IVO prop (two blade, less weight) to see if it changes
anything.
I'm starting to believe
that the dampener system on the RD-1C drive just isn't going to work
for the single rotor. Don't take this as a knock against the drive,
because it works fine for what it was designed to do (2 and 3 rotors).
Tracy was very up front about the fact that he had not considered anyone using
it on a single, therefore no reason to believe that it would be
suitable. I knew full well that it might have these problems,
but I figured that some lucky list member may just end up with a discount on an
RD-1C and flex plate combo :-)
Does anyone know if Atkins ever got his
single rotor belt drive built, and if it works? Anyone got a suggestion
for a ducted fan that might work for the Kolb (Bernie, Perry?)
Off to Panama
City...
Rusty
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