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I would really like to hear the
logic on that one! (Why RB or Leon recomend against.)
Racing Beat
is easy. Here's their number- 714-779-8677 (8-5
PST)
If Leon gets
a chance, maybe he will pass along his thoughts as well.
Aircraft need HP! There are
two RV's flying now with the Powersport conversion. (Which is PP)
Van's is doing comparison flying against the lycomings, or may have finished
already. To be published in the RVator newsletter. They posted that they loved
the performance. Powersports conversion is expensive, and they need to work
on the radiator layout. The performance IS good however.
The article was
published a couple months ago. Sadly, they only barely beat the 180
HP factory RV-8 in climb to 8000 ft. One beat it by 15 seconds, the
other by 8 seconds. For top speed, the PS engines ran 183
and 180 kts, and the 180 HP factory plane ran 179 kts. The PS
engines burned considerably more fuel, and were quite a bit
louder.
I'd bet Tracy's Renesis,
with an MT C/S prop (since they had them), in an RV-8 would kick there
ass. I would also bet that Lynn, Leon, or Bruce could easily build a
mildly ported 13B that would run just as strong as the "215 HP" powersports
engines.
If your timing on the PP isn't super radical you shouldn't have
any idle problems.
I guess this would be true, but when you eliminate
timing overlap, don't you also eliminate most of the power advantage? It
just seems like a mild mannered PP is a waste of time, UNLESS it's the only
means to an end, such as in Richard and George's custom side plated
production.
Remember all the early rotary
engines were PP!
I've heard the
stories. Interesting how they quickly went away from that
configuration :-)
As I mentioned earlier,
I'm NOT a rotary engine expert, and I've never even seen a PP run. At my
level of experience, the smartest thing I can do is listen to the people who
have years of experience. There are a lot of new, impressionable
folks lurking on this list, and I don't want them to get the idea that a
homemade PP engine is automatically going to be better than the stock side
port. It "might" be, but there's no evidence of it that I've seen
yet.
Cheers,
Rusty (someone has to
play the villain)
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