Yes  here is a 3 rotor version using the schertz beam.
I'll redo if for  Jeff's motor plate shortly.

Paul Lamar



Thanks Paul !

Don Mitchell

Here is what it looks  like.


-----------------------------------------------
Delete all of those  old jpgs. Reset!

I have found a way to simplify the mount and  remove
a few tubes of those tubes.

Here are the new  3D's.

Replace them with these.

-------------------------------------------
Here is what the cowling  could look like.
There is tons of room in there for a  large
rad.

Paul Lamar

Yeah, that looks  great!!!  Can you tell how much room there will be
over the top  of the engine?  That always been my concern......having
room to  cross over with the intake manifold.

Don Mitchell

Hard to say without a stock RV10 cowl dwg.
It is going to be tight  as the thrust lines is only 10 inches
down from the top of the cowl.  You will need a low
profile water pump.

If you have  the stock cowl set it up in the corner of a room
and make some  measurements of the side view on the cowl
center line and send them  to me. Same for the width
measurements. Try to do it every 10 inches  along the length
and I can reproduce the cowl dwg in  3D.

Another way is use a long lens
on a digital camera  perpendicular to the top and perpendicular
to the  side.

Here is a 3D guess side view.

Paul  Lamar


Paul,
Those drawings are great !   I wish I  could figure out how to do
that!!!   Can you send detailed  drawings of the mount with dimensions
of the individual tubes ?    How must clearance is safe between the
exhaust header and the mount  tube?

Don

I am not sure I have it right. Do you have a RV10  cowl?

Paul Lamar



No, unfortunately I didn't buy the entire kit yet.  Will have to put  the
mount on hold until Summer when the cowl comes.  I've just been  enjoying
taking a break to work on the engine over the Winter, and was hoping to  test
run using the actual motor mount on a test stand.

Don

Well Jerry Hey did a couple before as I recall. One RV10 for Bobby Hughes
down in Austin. If you have a couple of days you might go down
there and talk to those guys as there are at least three  3 rotor
aircraft in the works in the Austin area.

Mark Steitle has been flying his Lancair ES
for quite some time and I think Bobby Hughes has flown his RV10.
It is rather unusually as it is a supercharged 2 rotor instead
of a 3 rotor as one might expect to find in an RV10. If Bobby says
the cowl fit OK I have the critical dimensions for that installation.

Bobby had some problems with the mount Jerry welded.
It appears the cups were welded on at the wrong angle pointing up
the need for an accurate motor mount welding jig.

Exhaust heat may have caused a problem as well judging from
the attached pictures. The stock RX8 exhaust manifold
was used and it wrapped around the Schertz beam transferring a
lot of heat into the steel Schertz beam and rubber MM bushing.
Supercharged engines generate an ungodly amount of exhaust heat.
A 250 HP supercharged engine is making 300 HP internally due
to the HP consumed by the supercharger. A turbo on the other
hand is using mostly waste HP from the exhaust.

Jeff's motor plate is  further away and it can be easily shielded
from the stock RX8 exhaust manifold. Not a factor for you as your engine is
a 3 rotor and your exhaust manifold of necessity will be entirely
different and much further away due to the p-port exhaust.

What I need to find out is; if at least the RV10 cowl fit Bobby's
airplane.


Paul Lamar