Dear Paul,
I have been reading many of the articles on your website, they
are very
informative. I have been looking for a good engine for a heavy
duty
gyroplane, and I was told a Subaru EJ25 is a good choice.
However, I
have not been convinced. I would think the 13B would be a much
better
choice. I owned a RX7 for many years, and when I sold it after an
accident it had well over 150,000 miles and the engine was in
perfect shape.
I have a couple of questions and hope you can help me out.
First of
all, do they make brand new rotary engines? If not then we can
only buy
old cars for the engines which is not easy to do in my country
as cars
must be destroyed after 10 years. Second, how does the power
to weight
ratio of the rotary compare with that of the EJ25? The data I
got just
got me very confused. The power for the EJ25 ranges from 165hp
to 300
hp. This sounds rather strange, and with such power range the
EJ25
could have rather high power to weight ratios too.
Best regards,
Gordon Gao
Mazda stopped production this year but they do that from time
to time
as the market is currently saturated.
They did that in 1995 but started up again in 2004. There have
been 2.5
million sold world wide so there is no
shortage of engines.
The rotary is in no way comparable to a piston engine. There
are no
stresses in the rotary that lead to metal fatigue
unlike a piston engine. A 300 HP Subaru is a hand grenade. If
you are
not killed by the shrapnel in the explosion the
resultant crash will do it. :)
http://www.rotaryeng.net/What-is-a-rotary-engine4.html
http://www.youtube.com/watch?v=QOwb8QRHrMY
Paul Lamar
Does it fit a so powerful engine with such a lightweight
flying machines a Giroplane? I'ts just a question form a 100%
novice, the Austro engine with 40 KW sound good for that kind of
Autogiro, that probably with an engine so big would spend all the
power just taking up the engine weight.Can you give me some feedback?
Thanks, best regards, salut +
Jose Gros-AymerichE-28033 madrid, Spain
I don't understand the question.
Gyro's require high power as they are basically a powered
parachute :)
They are in a continous state of auto rotation so to speak.
It is a brute force approach to flying.
Paul Lamar
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