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John -
We have not had any shimmy yet and a couple of the runways around here are pretty rough. We do not have the strut fairings or the wheel pant installed yet, so the influence of the heat from the engine going down the fairing and heating the strut has not been a problem. And, the influence of the pant itself on the strut dynamics is not there. We'll install the fairings first and fly it. This will give us an idea of the strut heating and also if the oil temps and CHT's are affected by closing up that big gap on the bottom of the lower cowl. If all works there, we'll add the pant.
We used the castle nuts to secure the drag link to the mount and strut, but used the regular stop nuts on the bearing blocks to the mount. Our first set of bearing blocks were thinner than the replacement ones. We had a homemade aluminum shim for each block. We had no room for shims on the second set. Both plates on the mount seemed to be parallel.
John
On Sun, 12 Nov 2006 14:56:21 -0500, John McMahon <blackoaks@gmail.com> wrote:
Hi guys,
I received new bearing blocks from Tim at Lancair to correct the 5.5 deg
forward angle on my nose gear and when I was ready to install them I
realized the mounting pads on the engine mount were not parallel. The
starboard one sits vertically however the port one is canted 5/16" out at
the top. Have any of you had that situation and if so did you make a
tapered shim, use washers or some other fix?
Also I remember someone, I think it was Mike Easley, suggesting getting rid
of the castle nuts and using standard nuts to reduce play in the nose gear
attachment. I like that idea has anybody tried that yet?
John, Any tendancy to shimmy yet?
John McMahon
Lancair Super ES, N9637M
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