What filament would be best for engine mount shims, if any?  I could use metal, of course, but wonder if engine heat would melt the more heat-resistant filaments. The engine in question is a Brodak 40, which does not sit at the right height in my Vector.

Thoughts?

thanks,

Peter

Peter
if you can get some the thickness youneed, phenolic (spelling) will work nicely.

Carl

ABS should suffice. Mind you, I haven’t tried it.

"Filament?"

"Material."

ABS will work, various thicknesses and easy to cut/drill. Layer pieces up for fine adjustment.

I've used ABS behind R/C motor mounts to add offset.

   SIG offered an engine support, primarily targeted to profiles I would guess, and it was some sort of black plastic and shaped like a squarish "C". I've used them and never noticed them compressing or changing in any way. This was at a time when SIG did almost all of their own plastic molding, so it was probably the same plastic (black) as their 4" bell crank. Top Flite used to make a similar product but smaller and intended to be used as one under each side. I have some of those also. Sterling , I think, used to make some plastic wedge supports the same way and were in varying degrees of angle to set engine offset for a profile. These were white nylon, it looked like, and while they worked OK, they were too thin and flimsy  and would distort if they were not on a solid, smooth surface. Given that, though, engine heat didn't seem to affect them. If I were to try to 3D print something it would be similar to the SIG offering with about a 1 degree offset angle and make them in specific widths for specific brands of engines.
  Type at you later,
   Dan McEntee

Dan,
They were made from a plastic called Ryonite (sp) glass reinforced injectable plastic that worked very well and had
plenty of strength.  I don’t remember who made it but it wasn’t hard to find so we ordered a few bags, we made a number of injection model parts from it, including motor mounts, 4” bell-cranks, thrust wedges, and control horns.  What was cool when they were dropped on the floor they would almost ring like metal parts would.

Later,
Mike Pratt

While I cannot comment on your exact engine, PETG would be what I would use. I have made 1/2a TD engine mounts and it appears to hold up well. I also have made up and used PLA for 1/2a engine spacers as well, but these are for a plastic backplate.