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Message
Hi Rusty, seems to me the whole idea of building the runners and horns in a
plenum is shooting for 'tuned induction' .With this idea you have just screwed
any chance of achieving tuned length. Ram air in the inlet at 100kt {V climb} is
good for less than 1/4 psi at best, the tuned length has much more benefit for
volumetric efficiency than 1/4 psi. Put a filter on the plenum and as far from
it as will fit under the cowl. FWIW, Dave McC { 6.5b in gestation}
That's
certainly a good point Dave. Ernest's idea should work better than
mine, but the box is going to probably be taller than I have room
for. Given the choice, I would rather have the power than a
filter, since realistically speaking, there's no way I could ever wear this
engine out with the amount of flying I (don't) do.
I'm trying
very hard to convince myself to just fly the plane, and leave it alone.
It's not like I need more power, since I'm at least in the 2500 fpm climb, and
200 mph range. It's running well, and cooling too well. When the UPS
guy arrives tomorrow, I'll even have everything I need to actually put together
a single rotor engine, so I should really leave well enough alone for now on the
RV-3, and get to work on the single rotor projects.
Wish me luck
resisting a supercharger :-)
Cheers,
Rusty
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