There are two ways to do it. Unfortunately I don't have access to a photo of how I did mine at the moment.

One, you can make aluminum plates that bolt to the four screws that hold the crankcase together. These plates then extend out sideways far enough to be mounted to a beam type mount just like a normal glow engine install. The only problem with this method, other than making the mount plates, is that it makes the overall engine mounting very wide and won't fit some firewalls.

The other way is to mount the engine directly to the beam mounts, using spacers on top of the beams to raise the engine up so that the bottom rounded part of the crankcase clears the beams. You use those same four crankcase bolts, but they go through the beam mount, then through spacers, then into the engine. This is how I mounted mine and it worked fine for many flights. (I finally gave the engine to my brother for a project plane of his.)

Hope this makes sense. If I had access to my pics it would be clear. []

AV8TOR