gear brackets
Posted: Sun Feb 19, 2012 10:35 am
It is very difficult to say whether changing to the new 'B" brackets is
worth it on a completed gear box area. The aircraft has never suffered a
failure of the brackets, only the front bolt and the end tabs of the
carrythroughs on the 2500, which attach to the sill.
If you upgrade to a 3500, you have to change the 309's to accomodate the
larger leg. I would also strongly advise anybody staying on wheels with a
2500 to upgrade the gear box area to 3500 status.
It stands to reason that if you capture the whole gear leg in the bracket,
it must reduce the tension load on the front bolt during twisting of the
leg.
The landing phase and braking action twisting the leg introduces this
tension load on the front bolt. Jamming a big piece of steel like that in a
block of aluminum has got to help. How much I don't know.
So, I guess if it is built, leave it alone but upgrade to 3/8" bolts. If
not, go with some new "B" brackets.
Anybody know why 2" pulleys from Murphy are 35 bucks, but only 10 bucks from
Aircraft Spruce????
Brian
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worth it on a completed gear box area. The aircraft has never suffered a
failure of the brackets, only the front bolt and the end tabs of the
carrythroughs on the 2500, which attach to the sill.
If you upgrade to a 3500, you have to change the 309's to accomodate the
larger leg. I would also strongly advise anybody staying on wheels with a
2500 to upgrade the gear box area to 3500 status.
It stands to reason that if you capture the whole gear leg in the bracket,
it must reduce the tension load on the front bolt during twisting of the
leg.
The landing phase and braking action twisting the leg introduces this
tension load on the front bolt. Jamming a big piece of steel like that in a
block of aluminum has got to help. How much I don't know.
So, I guess if it is built, leave it alone but upgrade to 3/8" bolts. If
not, go with some new "B" brackets.
Anybody know why 2" pulleys from Murphy are 35 bucks, but only 10 bucks from
Aircraft Spruce????
Brian
_________________________________________________________________
Don't just Search. Find! http://search.sympatico.msn.ca/default.aspx The new
MSN Search! Check it out!
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
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