You are trying to do this with a very small displacement
engine(almost half
the size of the 3.2L), which means you will really have to
wind
it
<<<snip>>>
rotor head, but I assure you our criticism is
only intended
to be constructive. I hope you make us all look like fools,
because I hate
to be the bad guy, but I also worry about the safety of your
engine choice.
Monty
Paul, The best piston sound I ever heard was a P-38
turning onto the runway and pouring the coal to it
for take off. Virg
Well, again, I'm in a huge crowd of one. I'd like the engine and
prop
both to be whisper quiet. Yes, I know that is impossible with
current
technology with the prop, but the engine can be mostly silenced --
tradeoff between power/weight and noise.
AI Nut
Actually Al,
You are not alone in that regard. I too would like a whisper quiet
aircraft
engine and prop. I got started flying in sailplanes and I have never
gotten
over the relaxing effect of soaring with bald eagles in silence. One of
the
reasons that I looked at using a piston engine was being better able to
silence the exhaust. I am not convinced that this is not possible with
rotary, merely more of a challenge. The new side exhaust engines will
help
this, and a turbo will help out as well. The only way to make a prop
quiet
is to turn it slowly, which means it has to be big, which creates
problems
in a high speed Xcountry design. So I guess I'll go for reasonably quiet
in
my Xcountry plane, and go soaring when I really want tranquility.
Monty
One of my reasons for choosing a turbo.
Paul Lamar
When the time comes me too! Besides quieting the engine by a large amount,
the Turbo erases many weather, mountain, and temperature concerns. You can
always still add a muffler to it also.....and the muffler will last longer
than on a hotter non-turbo.
If your truly stuck on a small piston engine, probably about the most
durable is the Audi/VW 1.8T. In production since '96, it comes in many
VW/Audi's in ranges from 150-225Hp from the factory (A4's, Passats,
Beetles,
Jetta's, and TT's), and in racing 400+ is not uncommon with very little
internal changes. It is heavy though, proper German Iron Block! For years
(since '96) people have been dropping in $200-500 Chips that up the stock
boost from 6psi to 12 (efficiency limit of the stock K03 Turbo) for a
quick
50-75Hp boost, while other's with more $$$ up to a K04 with intake/exhaust
mods and 320-350 Street HP, and after years of watching this I've heard of
almost no failures.
Of course...that's not in an aircraft!
I'll keep my 1.8T in my car, and put a Rotary in my future homebuilt. I
see
no better choice.
Cheers!
About twenty years ago it was possible to drive flat out in Europe for
up to a couple of hours. European engines were designed for it. I drove
from Rome to Frankfurt in one day back in the early 80's. Never-the-less my
Opel
1.5L rental car had a leaking valve when I started it up the next morning
in Frankfurt. Those days are gone forever and the engines are now designed
for American driving conditions. Way back in the 60's you could run a VW at
72 MPH
at max 36 HP all day. Then VW started adding power, the top speed increased
and
you could no longer run it flat out with out having engine problems.
Paul Lamar
John Tami wrote:
You have forgotten the Autobahn! Maybe not as traffic free as it was back
then, but the speeds are still there. And few engines are designed for the
USA any longer. Chassis setting yes. Porsche started it first when in the
late 80's/early 90's USA bound Porsches had more HP then Euro ones. Since
then 90% are the same (even BMW with the M3 finally relented!) though of
course over there due to tax brackets and higher fuel cost's they have more
options mostly on the lower end and of course the high tech diesels that we
wont have until the US Fuel Companies roll over dead! But my engine is
exactly the same as the Euro Passats!
Cheers!
Been over many times since and I am struck by the extremely heavy traffic
and even some speed limits.
Paul Lamar
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