Leon Promet wrote:

G'day Paul,

See comments below marked ##.

SNIP>>

If a casting is made it might be possible to move the starter over to the
other
side. With the current long ten mm bolts and spacers it is not practical
as the starter bolts interfere with the long 10 mm bolts.

##
Well,  the way the Factory does it is to use the bolt on the plug side as
one of the starter retaining bolts.  See,  the patterns we already have
mimic the factory bell housing,  and taper in to the flange that mates to
the gearbox.  I'll have to get some pics on Monday when I see Jeff.

It looks like we may be able to just trepan the bell housing at the level
of the starter flange.

The spacers are 3.050" long, quite a bit shorter than the bellhousing.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

It would be better if the rubber mounts were moved back about 2 inches or
so.
More inline with the joint between engine and bell housing if you are
considering
making a casting Leon.

##
There is no real reason why the mounts cannot be incorporated in the bell
housing itself.  At least,  a pair of nice fat flat mounting flanges either
side,  and one underneath (a similar to the way a Series 6 REW mounts).

##
All is possible.  Let me get some pics of what is already available,  and I
will do some freehand sketches of what I was thinking for my own purposes.
 When you lob here,  we can go  out to Jeff's factory and have a talk to
him.  I'll be seeing him on Monday anyway,  so I should have some pics
available by Wednesday.

The basic idea is to keep the bottom of the engine
flat all the way across to the motor mounts to accommodate angled rads
under
the engine while still trying to keep the rubber bushings away from the
stock
turbo.

##
Are you intending to have any top stays on the engine,  and how do you
intend to support the front of the engine to take the gyroscopic couple of
the prop.  I know fom past posts that you intend to brace the PSRU with
external struts.

##
>From the drawing you have supplied,  you still have a mechanism,  not a
structure.  The front of the motor MUST be constrained in some way,
 especially in the vertical plane.

That is done by Tracy's spacer blocks as shown in this photograph of Mike
Wills RV4 installation. A proper bell housing would take over this function. PL

##
Anyway,  I'll zap you some hand sketches when I can get near a digitiser.

Leon Promet

 
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