What kind of engine mount do you have now?

 Yes our dwgs give the tube lenght. It is best if you have something
 like 2D Q Cad so we can send you a dxf and you can then use Qcad to get
 any dimension. Try that approach first. If that does not work we can
 do something else.

 Here is the Schertz beam version MM for the RV7 which is your kit of
 chioce
 as I recall. I will revise it for Jeff's motor plate if you wish.

 Paul Lamar

 Paul Lamar  The mount I have is the plate between the engine and oil
 pan  I would like to change to Jeff's motor plate I should -might be
 able to remove all the forward tubes except for the nosewheel mount
 and build from that I can build a jig sim to firewall and motor
 position spaced off firewall for a jig
 I do not have Qcad or any sim program  Would be willing to pay
 shipping and for plans as needed
 Thank you Keith--

Well that will work.

OK I'll have to do a new mount for an RV7A. No problem.

BTW here is a refinement on the motor mount jig.
Use Jeff's plate and mount a laser in the center of the hole
to put a spot on the firewall.

---------------------------------------

Here is the mount using Jeffs plate.
If you build the jig you don't need the dimensions
of the tubes as you can measure between the points.

All tubes are 4130 .049" wall. The dark green are new
and the light green are the stock mount. The lower
side tubes are one inch dia. The upper side tubes
are 3/4 inch in dia. The X under the engine is 1/2 inch
dia. as the loads are low and at least one is in tension.

The rear mount will come later as there are several
possibilities off the nose gear socket.

Check the firewall hard point dimensions and the
distance from the firewall to the prop flange.
Also see if there is an off set and down trust
angle. You can use the stock firewall to tack
the mount together but not the final welding.

A cheap construction laser is handy for setting
things up with the correct dimensions.

More to come.

Paul Lamar