Mike,
Mistral Engines(who was at sun n fun) with their prototype info on the
200hp rotary and cs gearbox have already done that. Ask them if they
will supply the rear (front on car) cover to you. It fits the 13B
housings. Won't be cheap tho.

Marc Wiese

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]

On

Behalf Of Michael McGee
Sent: Monday, April 19, 2004 6:50 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] 13B dynafocal mount - was dream time

At 08:39 2004-04-19, you wrote:

the puzzle. It seem there is a lot of re inventing

the wheel. I


I was thinking that, too.  Then I realized that what
is going on is parallel developement.  Something you
will probably never see in a corporate lab.  Lots of
slightly different ideas being worked on at the same
time.

What I see happening right now is that a lot of
these ideas that have been on the workbench for
years are coming out of developement and into long
term testing.  I think over the next year or so you
will start to see a lot more consensus on what works
best, as the different approaches get tested and
we're able to see what works best in the real world.
 Then you'll start to see people willing to bet the
farm on a business venture to create firewall
forward packages.

Speaking of dreaming..

What do you guys think of the viability of a front cover cast into the
form
of a standard Lycoming dynafocal-1 mount?

A loose collection of my thoughts so far:

I think it would sell well enough to get the price under $500 for the
kit.  I was bs-ing with the local rotary engine builder the other day

and

he showed me a very nice third-gen oil pan that was cast as a

torsionally

stiff replacement for the stamped steel original.  The reason behind

the

pan is another story but the casting work looked great (from this
engineer/
non-casting expert's perspective anyway).  He insists that he has a
casting
guy that is capable of making what we need if I can get him a proto

type

part.

The thought here is a Dynafocal mount would open up more of the market

to

those who would convert to rotary engines (like I'm doing) if it

didn't

require changing the motor mount.  I realize that we can make a decent
mount without it and use something like the Schertz beam or the bell
housing that the ACRE group is working on.  The Dyna-1 mount would be

an

effort towards more of a standardization for aircraft use.

I've been toying with this for the last couple of weeks and while it

needs

some serious planning for water pump and alternator accommodations,

I've

got a bit of it worked out.  As expected it isn't as easy as

originally

thought.  Of course if it was it would already be done.  It would be
supplied as a package with water pump system and alternator mount.

This does require using a remote water pump like what Paul Lamar

created

and which isn't a bad idea.  It gets the pump down lower for better
performance.  If you use a 3rd gen water pump with its own remote pump
housing it could be mounted co-axially with the crank and get rid of a
water pump drive belt.  (3rd gen pumps run opposite direction to

earlier

pumps)

It also would require using the 3rd gen crank angle sensor plate and
pickups.

There are enough bolts on the front end plate to hold it
together.  Additional reinforcements for the aerobatics crowd would be
added at the oil pan-to-front cover flange and on the top from the EGR
port
on the center plate to the top of the motor mount/front cover.  This

would

probably be standard for the 20Bs.

-Could be that the sealing surfaces would be a problem as a structural
interface?
-It would put the prop flange about 2 inches forward of the Lycoming
installation.  However that would put the 13B c.g. about the same as

the

Lyc.

As an RV-4 owner the thought of a motor mount as compact as the

dynafocal

mount is appealing.  Yes, I know it has been done on an RV-4
otherwise.  I'm just looking at future possibilities and.. gee..

ANOTHER

project.

Okay, enough for now, you guys shoot holes in this for me....


Mike McGee, RV-4 N996RV, O320-E2G, Hillsboro, OR,

jmpcrftr-at-teleport.com

13B in gestation mode, RD-1C, EC-2.
..need to quit thinking and get some building done...

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