All, from my experience with bolts fracturing, it is usually over
tensioning or particularly unequal tensioning . I think Lyn's
advice has really shone the light in the tunnel with his
suggestions for tensioning the bolts. Basically do them multiple
times to ensure equal tension on all bolts. My $.02 worth after
many years of having to drill out broken studs.
Neil.
My mount is much same, just 1/4” steel plate
with homemade sump welded to plate, works well, lightweight
& no broken tension bolts so far.
Would be interesting to also know at what time
since overhaul that bolts broke, to see if there is correlation.
Andrew
Jeff, At
last someone did what I did, except my plate is only 3/8 "
thick, but then I only use rear mounts with the plate. Very
simple and
works well to date. I have no idea if foaming is a problem,
but have
never lost oil pressure, so am assuming there is no problem
going on in
the sump using standard Renesis oil pickup as I have.
On 7/4/2018 9:49 PM, Jeff Whaley jwhaley@datacast.com wrote:
> My aluminum plate is 0.5" thick; you can see it is
routed around the rubber mounts, the center is wide open -
just a 2.5"-3"" strip of metal left around the oil pan
bolts/engine mating surface.
> Jeff
>
> -----Original Message-----
> Out of curiosity (of course otherwise why would i ask)
what is the thickness of your plate between the pan and the
engine?
>
> Happy 4th
>
> Rich
>
> -----Original Message-----
> From: Jeff Whaley
> Sent: July-03-18 10:41 AM
> To: 'Rotary motors in aircraft'
> Subject: RE: [flyrotary ] RE: Tension Bolts
>
> Rich, my engine is a 1988 13B, normally aspirated,
aluminum plate bed mount, so the engine is held in-place by
the oil pan bolts. The aluminum plate and engine mount are
of my own design and construction.
> Jeff
>
>
> -----Original Message-----
> Thanks Jeff
>
> Which model of rotary
>
> What kind of engine mount
>
> Any other modifications to the engine
>
> Rich
>
> -----Original Message-----
> From: Jeff Whaley
> Sent: July-03-18 9:54 AM
> To: Rotary motors in aircraft
> Subject: RE: [flyrotary ] RE: Tension Bolts
>
> FWIW: I had one broken tension bolt on spark plug side
of the engine; not exactly sure which one but it was around
the 10 o'clock position if looking at the bolt heads end.
The bolt broke in the threaded portion right where the
threads were no longer engaged with the housing ... this was
posted way back in 2011 ... see message #53485. Jeff
>
>
>
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html
--
Homepage: http://www.flyrotary.com/
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Regards
Andrew Martin
Martin Ag
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