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Thanks, Ed, that does
help.
I am going to run a dry
sump oil pump so I won't have the pan volume problem. I just need a pan design
that will allow oil recovery in aerobatic flight. Also, I think if I prohibit
left wing down knife-edge flight, where the engine would be upside down, I will
have no oil pickup problems associated with oil against the rotors.
I plan to use Tracy's
products and think a custom engine mount will be little extra trouble. I was
hoping to use Jerry's beam, though.
Thanks, again Ed. I'm sure
I will have more questions later that you have answers.
Ben
----- Original Message -----
Sent: 09/05/2006 1:42 PM
Subject: [FlyRotary] Re: Engine
alignment
Hi Ben,
Not Dale, but can provide you my
perspective on "Plugs Up". There are only two down-sides if you wish,
one is that most vendor products such as engine mounts are designed for the
automobile orientation - this may or may not have an impact. I have used
the Ross redrive as well as the RWS redrive - both using different
mounting approaches and had no problem with either. The
second is that you need to design a sump so that the oil sump hangs below the
engine line and extend a line from the oil intake to that sump, provide a
means for the oil to drain back from the engine to the
sump.
My first one did not extend below
the engine and I could put no more that 3 1/2 quarts into the system before
the oil would cover the drain back tube, this in turn would cause oil mist to
be blown out the oil fill tube. I had not problem flying with 3.5 quarts
because the engine used no engine oil. However, my recommendation is to
design it so the oil sump is below the engine thus assuring no covering of oil
return and being able to hold a couple more quarts of oil.
Here is a photo of one I had made
and a drawing of another design for "Plugs Up" oil pan by Jim Mosur. I
used a 4"x4" section of 1/8" wall aluminum tubing to make the sump and 3/16"
plate to cover the engine bottom. You must provide for the protrusion of
the oil pressure control device near the oil pick position.
Hope this gives you some
ideas
Ed
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