CorvAircraft> snap ring question

[AVLEC]

Clare wrote:
" However, I do have ONE  serious question. Are you running a flywheel? If
so,
> how heavy?
>
> If not, you are asking for trouble. If not heavy enough, ditto. You are
> going to thrash the living daylights out of your coupling in short order
if
> you "decouple" your "flywheel", which is your prop."

This is something I am aware of and has been bothering me for a long time.
After reading up on tortional vibration on the "EPI" websight which by the
way has some excellent info on it, it looks like I would be better off
without the spring dampers and mount the splined hub directly to the crank.
It looks like they do endorse splined drives though. I would rather bolt the
prop directly to the crank (with a prop hub of course) than use a heavy
flywheel. That combined with the front bearing hub and shaft would weigh
much more than I am willing to add. I do feel though that with all the
development going on with EFI and Electronic ignition,etc, we will one day
reach the limit of the nitrided crank and somebody will have to come up with
a viable solution to isolate the crank from thrust and gyroscopic loads and
possibly the tortional vibrations as well..

I have a spare 80hp motor here that I will be using as a test bed for all
this so I won't be testing any of this stuff on my beautiful 3100 or in the
air untill I am sure that I have a reasonable chance of survival (LOL). Your
point is very valid though. It would actually be interesting to build it
with the springs and film it to get an idea of just how destructive
tortional vibration can be. It should make for interesting viewing in slow
motion!
Regards
Dene Collett
KR2SRT builder
South africa
Whisper assembler
See: www.whisperaircraft.com
mailto: avlec at telkomsa.net