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Doug,
I've been through the websites now - thanks for the links. Not an
awful lot of info on the prop but it does appear that the bottom line is it
works for him.
I'm sure glad my cooling system appears to be working well from
the start. After 13 years of building I'm not sure I'd want to have to deal
with a bunch more work to actually make it all work.
I'm also glad I went rotary rather than Subie. My wife's car is a 99
Subaru Forrester. Just put $3000 into it to repair various oil leaks that were
an extreme fire hazard. Seems there is a pretty common problem with oil leaks at
the oil pump housing and also the head gaskets. With just over 100K miles the
oil pump, both heads, and both valve covers were leaking. Every drop of oil that
leaks out of this engine ends up on the exhaust system creating a fire hazard.
My buddy's Outback had exactly the same problem at 60K miles. The shop that
repaired mine does a pretty good business in replacing Subie head gaskets. Due
to the tight confines the engine has to come out to replace them.
Mike Wills
RV-4 N144MW
----- Original Message -----
Sent: Saturday, March 14, 2009 6:20
AM
Subject: [FlyRotary] IVO Prop Info. (Have
you checked this out Mike?)
Mike Wills, et. al:
I have posted this info. on the list before but will do so again in case
some haven't seen it before...
These go to the Ross Farnham's site in Canada and he has a lot of
great information that documents his trials and tribulations in
installing a Subie turbo in his RV-6A. He has been flying behind a Subie
with an IVO high pitch (45-105 blades vs. low pitch of 30-90) for a
number of years and is therefore a great source to e-mail if you have
questions on its' performance, routine maintenance requirements, etc. He
doesn't have a huge spinner on his installation but uses the stock one from
VAN's and can still hit 181 kts. wide open and burning a bunch of
fuel...
The top link (above) discusses the IVO performance as demonstrated
in a side by side flight comparison with a similar RV w/180 hp and
Hartzell CS prop. He found that the two were very similar in most
of the profiles flown. The bottom link is the "home page" to
all his RV-6A information and I found his cooling discussions and
intake / exhaust manifold fabrication pages a
very interesting read...
Doug Lomheim
9A / 13B
OK City, OK
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