ARP5935 1

[dho]

ARP5935 para 3.6, for type 1, requires Rmr 70 - 90% at C0=5% and C1=.25Rz.
our grinder never met 70-90%.
do you know any one can do it? what special process?
thanks.

 

[WKTaylor]

dho...

This is a reason landing gear components are so expensive: specialized machined finish processes that are jealously guarded!

HVOFis tought stuff to attain a super-finish on. Processes may have to include multiple/overlapping steps, special materials and specialty equipment.

Suggest re-posting this question to Machines & Machining Engineering Forum

http://www.eng-tips.com/threadminder.cfm?pid=281

Regards, Wil Taylor

o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

 

[tbuelna]

In addition to WKTaylor's comments, take a look at these references:

http://standards.sae.org/ams2452/

http://standards.sae.org/ams2449/

http://standards.sae.org/ams2453/

 

[dho]

thanks.
know any shop capable?

 

[WKTaylor]

Dho... hmmm...

A company that does decent quality landing gear overhauls for USAF 'heavies' [Ogden Air Logistics Center] is Heroux Devtek [pronounced more like 'Aero-dev-tech'] in Quebec Canada.

I am aware that HD has invested heavily in machines/machining tech that could [not 100% sure] do what You need... but sounds like they could be a competitor???

Regards, Wil Taylor

o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

 

[dho]

thanks. we will try.