The Murphy Builders Site

Keith

I dug up a MAM diagram for the 0-235 and I believe it is the same mount
for the 0-320. It shows one degree of right offset and zero down thrust.

However you might check to see if I put anything in the archives (as I
often do) about 8 years ago. Reason is because I measured a conical
mount and my less than perfect memory recalls 1 or 2 degrees of right
offset and 1 or 2 degrees of downthrust. I can't find anything
definitive in my notes. For low power cruise with the soob and wing
cuff, the down thrust and offset was a good thing to put in my mount
from what I've seen. However I would not hesitate to use 1 or 2 offset
and zero downthrust if I was building an 0-320 mount.

If guys are cruising your configuration with the top of the door opening
level then I think that would confirm zero downthrust is perfect. I
would aim for the thrust line level when cruising with whatever reflex
flaperon you expect to use. So that may be a question to ask the list if
you still need the info.

Ken

kpierson@dcsol.com wrote:

I have started to build a mount for my 160 hp Lyc. engine,
I have all other dimensions that I need except the down thrust angle
that MAM uses? Does anyone have that information, or know were
I can find it?

Thank you Keith P.

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Ken: Thanks for that information, I'll try to look in the archives

Keith P.


On 8/24/2010 1:56 PM, klehman@albedo.net wrote to rebel-builders:

-> Keith
->
-> I dug up a MAM diagram for the 0-235 and I believe it is the same mount
-> for the 0-320. It shows one degree of right offset and zero down thrust.
->
-> However you might check to see if I put anything in the archives (as I
-> often do) about 8 years ago. Reason is because I measured a conical
-> mount and my less than perfect memory recalls 1 or 2 degrees of right
-> offset and 1 or 2 degrees of downthrust. I can't find anything
-> definitive in my notes. For low power cruise with the soob and wing
-> cuff, the down thrust and offset was a good thing to put in my mount
-> from what I've seen. However I would not hesitate to use 1 or 2 offset
-> and zero downthrust if I was building an 0-320 mount.
->
-> If guys are cruising your configuration with the top of the door opening
-> level then I think that would confirm zero downthrust is perfect. I
-> would aim for the thrust line level when cruising with whatever reflex
-> flaperon you expect to use. So that may be a question to ask the list if
-> you still need the info.
->
-> Ken
->
-> kpierson@dcsol.com wrote:
-> > I have started to build a mount for my 160 hp Lyc. engine,
-> > I have all other dimensions that I need except the down thrust angle
-> > that MAM uses? Does anyone have that information, or know were
-> > I can find it?
-> >
-> > Thank you Keith P.
-> >




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