Doc and Jerry. Here is the prelim design.
The tubes from the lower end of the nose gear socket up to
the upper hard points are the breakthrough feature. This
supports the nose gear socket from rotating clockwise on
a hard drop in landing and still provides plenty of room
for a large oil pan and a radiator and oil cooler mounted
under the engine. The tubes from the upper end of the nose
gear socket provide lateral support for the Schertz beam
and prevent the nose gear socket from rotating counter
clockwise (side view) in the event of a pot hole type load.
The engine has two degrees off set to the right and a 2.85:1
gear box must be used with this off set.
Only half the mount is shown.
Any comments.
--
Paul Lamar ...No rotor no motor.
I am glad you designed it for the 2.85 redrive as that is what I was
tentatively planning on. Tracy's.
I think the nose wheel is fully castoring, but I am not sure. Can anybody
say for sure? With a fully castoring nose wheel, is it possible to generate
a torque about the axis of the nose gear socket? I wouldn't think so, but
then I am just a poor ignorant software engineer (retired) . If such a
torque were to be generated how would it be dealt with? I understand the
tubes should be loaded only in tension or compression according to Tony
Bingelis.
The nose wheel retention bolt is a SOB to install; it requires a hole be
drilled in the firewall. I assume this is necessary to get the Lyc engine CG
where it needs to be for proper W&B. Since we have info that the CG with the
rotary was an inch behind where it was designed to be with the Lyc, and we
have agreement that the rotary should be moved forward that inch, does the
foregoing mean that the nose wheel tube also moves forward? If so, would
there will be sufficient clearance to be able to install the bolt and not
have to make a hole in the firewall? The fewer holes in the firewall the
better IMHO. Moving the nose wheel socket forward an inch means that the
nose wheel also moves forward an inch. Is that good, bad or indifferent?
Does moving the nose wheel tube forward cause an interference with some
engine part or accessory? Or do we leave well enough alone and keep the nose
wheel socket where Van put it and simply move the engine further away from
the firewall? Sigh. Why do apparently simple things have to be so
complicated?
No other considerations occur to me at this time.
All in all, I am delighted.
Doc
"poor ignorant software engineer" Some how I doubt that :)
If you drop the wheel down into a pot hole far enough anything is possible.
From reading the drawings there appears to a small bolt that keeps it aligned.
Strange that you should choose that failure mode rather than the
myriad of all other possible failure modes.
The nose gear can stay where it is.
From the side view dwg it appears that bolt has clearance.
Perhaps a capture nut is needed on the back side.
Are you talking about that little hole that says "tri gear only"?
Paul Lamar ...No rotor no motor.
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