Paul--

If it is correct that you will draw up engine mount plans for a Mazda
13B installation in our Pazmany PL1, utilizing a hertz beam, I  would be
grateful. The particulars are a follows. (If you could include Jerry
Hey's contact info, if you have it, it would also be appreciated  and/or
shertz beam construction and oil pan modification details).

The hard points on the firewall form a rectangle with a heighth of 16"
and a width of 30.5". The original plans called for a Lycoming 290-D.

  Although the center line of the aircraft is 1" above the top of the
rectangle, we will have to drop the center line of the engine to 3"
below the top of the rectangle to allow everything in Tracy Crook's  fuel
injection mods to fit under the cowl. The engine should have a 3  degree
angle to the left for a left handed prop and you had mentioned,
previously, a method for adjusting the tilt of the engine using  devices
similar to turnbuckles. The top of the schertz beam should be parallel
to the bottom of the line running between the hard points of the
firewall at a heighth of 7.75". Center of Gravity will be at 22 inches
from the firewall--I am hopeful that details for stabilizing the  rear of
the engine will be included.

The position of the gascolator, pictured, can easily be modified. The
brace arm, hanging in the middle of the firewall fits into the top  of a
collar that will be located at the rear of the engine about an inch
below the lower 30.5" line at the bottom of the hard points rectangle
and an inch behind the engine block.

In a previous message, I had mentioned running a junk 13B that had  been
overheated engine on a test stand with a glass of water sitting on the
stand with virtually no vibration. The only attachment to the  engine was
a stock manual transmission under no load and while it was loud--there
was no vibration.

Thanks again for your help--Tom Chapman

OK Tom no problem. It will be a day or so as I am away from my office
until Tuesday.

Jerry Hey has some Schertz beams he will sell if you wish to weld your
own motor mount. Jerry's email address is:
Jerry Hey <jerryhey@earthlink.net>

Paul Lamar ...No rotor no motor.

Tom, this is a nose gear airplane right?
I detect some parts in the picture. Do you have a side view drawing?
Can you take some pictures from the side?

-- 
Paul Lamar ...No rotor no motor.

Getting the strut to line up on center with a 3 degree off set will
be a challenge.   I am sure you (Paul) will come up with something.
Tom, when I changed the fixture for the rear beam mounts, I lost the
ability to off set the engine thrust line.   If it is necessary
perhaps you can shim the engine mount 3 degrees at the firewall.
Three degrees is not much.  One way to deal with off set is to build
the engine mount in situ with the engine positioned the way you want it.

You can write to me directly but I like working through these
engine mounts on the list where everybody can follow along.  So far
no two engine mounts have been identical.       Jerry



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