----- Original Message -----
Sent: Tuesday, January 17, 2006 12:35
AM
Subject: [FlyRotary] Re: shake, rattle
and hum
Why not reduce more, go all the way
to nearly flat pitch, from what I remember that prop is a little on the big
side for the Kolb, isn't it. Even if it doesn't produce any
thrust (flat pitch), it works as a flywheel - At least you eleiminate ANY ( if
there is...) stall issues at the tips....
Hi Thomas,
I thought about reducing it even more, but just don't
believe it could be stalling at 10
degrees.
And why don't
you have that brandnew, easy to work with, etc. ACES on the machine,
yet??
You're absolutely right
about the need to put the ACES analyzer on the engine. The only
problem with that is time. The decision has been made to defer the
single rotor project, and put my full attention on the RV-8. I'm
therefore trying to resist taking the ACES to the hanger. I'm
really looking forward to the whole science project, but I just ain't gonna do
it now.
What I say is:
You HAVE a vibration analysis tool - and an easy to use one! Try it! Props is
just one ofthe many uses!
Trying hard to
resist...
did you consider to run the PSRU without dampers? Even if you
get a buzz or something like that you know that the dampers where the wrong
ones....
I've considered it, but machining
the solid dampeners would take more time than I'm willing to spend at the
moment. As you say, it would make a difference, but good or bad is
anybody's guess. I actually believe I need much softer dampeners, but I
don't think there's enough room to make them give enough. Keep in mind
that this is nothing more than a SWAG.
Thanks for the comments.
Rusty