Can"t you have a shop weld it up and turn it down again like we do in auto
engines?
Is this a no-no on aircraft engines?
Steve Bray
Jackson Tennessee
The crank is rusted to .09 and it would require cutting to 20/20 to make it
work. According to William I can't use.
>Steven Phillabaum
>Auburn, A
Welding ads additional stresses to a crank. I've only seen one crank
that had the journals built up in an aircraft engine (150 Franklin). It
was cracked through #5 journal when I tore the engine down at 30 hours
SMOH. No more than a Corvair crank costs, buy another crank. I expect
William Wynn
>The crank is rusted to .09 and it would require cutting to 20/20 to make it
>work.
>According to William I can't use.
Okay, but are ALL of the journals bad? if it's only a few and they are in
the center, the crank might still be usable in the UltraVair 1/3 Corvair
conversion.
A guy can hope.
Oscar
I have a crank with one bad journal. I got it last night and haven't looked
close but I think it was #5 or 6. If its unusable for six cyl you're
welcome to it.
Thats the way I got it, a freind gave to me because he couldn't use it,
I'm coming to Houston this weekend.
Hope springs eternal
I know of one instance where a built up crank broke and caused the
destruction of a Jodel d11, C85 engine. Auto shops don't grind a nice
stress relief radius.
Ron Freiberger
mail to rfreiberger at swfla.rr.com <- substitute an @ sign ;o)
Absolutely I wouldn't use a built up crank. The "Best Machine Shop" in town
thinks I am being stupid for not using a 20/20 cut crank. He just does not
know. Since my post of the bad crank I found 3 cars in east Georgia in a junk
yard. When I called I was told I probably wouldn't want them becau
Don't know about the welding bit but they can metal spray the crank and
regrind the journals. Have used this method on old farm tractor parts
that are no longer available. Aircraft usage may be another matter
altogether.
Doug Rupert.
>
>
>
I've welded several high stress items in the past, reground them and
thrown them back in the furnace to re-do the heat treat process and
never had a problem but then again these were not crankshafts.
Doug Rupert.
>
>
Hey builders,
Just an update on the building. Since the warm weather I glassed the bottom
side of the Horizontal Sab.. But, I got my engine back from the machine shop.
The crank is rusted to .09 and it would require cutting to 20/20 to make it
work. According to William I can't use. Well back on
Are cranks available for the Corvair, or do you have to get whole engines to
get parts?
See N64KR at http://KR-Builder.org - Then click on the pics
There is a time for building and a time for FLYING and the time for building
has expired.
Daniel R. Heath - Columbia, SC
See you in Mt. Vernon
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