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blalmarz(at)embarqmail.co
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 Posted: Thu Apr 03, 2008 12:21 pm Post subject: N789AB Flies Wheel Bearing Problem |
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First Flight. I had the front wheel installed I/A/W the plans. I had
the small SS spacers and the axle was a little longer than the spacer
width. I believe I got some shimmy and the spacers allowed a little
side load on the bearing and it bent the cage on one set of bearings
and locked the wheel up.
Second Flight. I set the front wheel up I/A/W Tim's ideas and the big
AL spacers and cut the axle back 1/16", so the spacers captured the
bearings; and torqued the axle bolt to 190 in/lbs. I also ended up
with the pre-load on the forks at +/- 32 lbs. It handled good and had
no shimmy and I was able to taxi back to the hangar which is always a
plus.
I was going to change out the Al spacers for the SS spacers " down
the road " but I would suggest that you do it before you fly; more
important is cutting the axle back so there's pressure on the spacers
and bearings and not the axle.
FWIW On the second flight all CHT's were under 400'F and oil temp was
220'F with Sam James cowl and plenum. I will post full perf #'s and
temps when I have 5 hrs on the engine.
Barry Marz
18735 Baseleg AVE.
FT. Myers, Fl 33917
239-567-2271
blalmarz(at)embarqmail.com
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planesmith(at)hotmail.com
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| Posted: Thu Apr 03, 2008 1:28 pm Post subject: N789AB Flies Wheel Bearing Problem |
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Barry,
Congratulations on your first flight! Also thank you for the heads up on the spacers and the oil temperatures.
Vern Smith (#324 finishing)
Don not archive
| Quote: | To: rv10-list(at)matronics.com
From: blalmarz(at)embarqmail.com
Subject: N789AB Flies Wheel Bearing Problem
Date: Thu, 3 Apr 2008 16:18:02 -0400
--> RV10-List message posted by: Barry Marz <blalmarz(at)embarqmail.com>
First Flight. I had the front wheel installed I/A/W the plans. I had
the small SS spacers and the axle was a little longer than the spacer
width. I believe I got some shimmy and the spacers allowed a little
side load on the bearing and it bent the cage on one set of bearings
and locked the wheel up.
Second Flight. I set the front wheel up I/A/W Tim's ideas and the big
AL spacers and cut the axle back 1/16", so the spacers captured the
bearings; and torqued the axle bolt to 190 in/lbs. I also ended up
with the pre-load on the forks at +/- 32 lbs. It handled good and had
no shimmy and I was able to taxi back to the hangar which is always a
plus.
I was going to change out the Al spacers for the SS spacers " down
the road " but I would suggest that you do it before you fly; more
important is cutting the axle back so there's pressure on the spacers
and bearings and not the axle.
FWIW On the second flight all CHT's were under 400'F and oil temp was
220'F with Sam James cowl and plenum. I will post full perf #'s and
temps when I have 5 hrs on the engine.
Barry Marz
18735 Baseleg AVE.
FT. Myers, Fl 33917
239-567-2271
blalmarz(at)embarqmail.com
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