Now up to 166 times...
The designer gave permission to the draftsman to create the pdf and make it available to the yahoo radial engine group. Other then those specifics, I dont know if its ok to post them elsewhere or not, so I haven't myself. Those dont appear to be the latest revision, but if you plan on building it, join the yahoo group for a lot of good information and history on the engine.
If thats the 7075 spec crankcase material, you already know its an expensive engine to start building. I have planned on making the crankcase from a casting. Priced the internal gear just last week, its up to $99 now.
Hi Lakc. It's actually a chunk of an old belling mandrel from a PVC pipe extruder. :shrug: I'm guessing it's probably 6061, but it works nice and it was free. Thm: