JeffHs
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| posted on 27/4/08 at 04:36 PM |
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OT Crank measurement
Very off topic. I need to measure a crankshaft for parallelism and con rods for twist. Beyond my capabilities so I asked a local patternmakers to
check on their CMM machine, but they deemed their tolerances not good enough. Any ideas who can do this for me, preferably not too far from Derby?
Bits in question are from a 6 litre aero engine (Blackburn Bombardier), crank is 1 metre long. Engine is being rebuilt to restore the Auster AOP9 to
flying condition.
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mookaloid
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| posted on 27/4/08 at 05:09 PM |
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I can't help with the question but I like the sound of your project 
Auster AOP9
"That thing you're thinking - it wont be that."
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MartynV
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| posted on 27/4/08 at 05:37 PM |
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Any decent engineering shop be able to this with a surface table, vee blocks, dummy shafts and clock gauges.
Accuracy to 0.01mm is achievable, though it may be a bit labour intensive!
What about trying the motorsport engineering department at Derby University? They have extensive engineering workshops and would probably have staff
and students interested in checking it out without any cost to your project?
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JeffHs
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| posted on 27/4/08 at 06:14 PM |
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mookaloid's link is to an Auster 5, not a 9 - see my archive for AOP9. I cannot figure out how to post a link or a photo! I know I'm thick
but this is ridiculous!
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rusty nuts
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| posted on 27/4/08 at 06:17 PM |
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If you can't find anyone else to measure it any decent engine reconditioners should be able to help.
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82 Locost
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| posted on 27/4/08 at 08:25 PM |
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Personally I'd take it to a licensed aero engineers as they can check the crank for any other problems. Nothing like losing a crank during
take-off!
I flew with a guy in the States once who broke a crank during take-off and ended up cart-wheeling into a vineyard. He was walking again 6 months
later.
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gazza285
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| posted on 27/4/08 at 08:34 PM |
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http://www.bradfordgrinders.co.uk/index.html
DO NOT PUT ON KNOB OR BOLLOCKS!
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