Fred,
I have operated a KR2 from Johannesburg, South Africa (5300' with frequent
high temperatures, which had a stock VW Type 4 (given for 65 hp), coming
nearly straight out of a minibus. My opinion is it would have had more
than enough power if the combination of engine and prop had been right (it
had been optimized for speed at sea level). I finally changed the engine
for a VW 2.4 liter, given for about 80 hp, and from the testing I did
before I left the country, it is more than enough for a heavy KR like
mine, even with full fuel and 2 on board.
I changed the engine because I could, and wanted to build one of my own.
But frankly, I could have made another prop, and that would have done the
trick.
IMHO, people tend to get carried away on their power requirement. A KR can
fly nicely on low power, if you get your powerplant right.
Serge Vidal
KR2 "Kilimanjaro Cloud"
Paris, France
"Fred Johnson" <f...@renotruss.com>
Envoyé par : krnet-boun...@mylist.net
04/08/2006 22:02
Veuillez répondre à KRnet
Remis le : 04/08/2006 22:04
Pour : "'KRnet'" <kr...@mylist.net>
cc : (ccc : Serge VIDAL/DNSA/SAGEM)
Objet : RE: KR> Subaru engines
Thanks Mark!
I've forwarded an email to them.
My other option has been using an O-200 or 235. I'm not sold on the
Corvair yet, nor the VW. My altitude here at 4SD is 5046' and the VW
just makes marginal horsepower at this altitude in my opinion for two
and full fuel, unless I built a type IV with 2700 CC's or more.
I had considered the EJ22 which would net me 120 ponies from what I've
read so far. But claims about their weight scares me, it would mean an
aircraft empty weight of around 650#.
Any thoughts on all this?
Fred Johnson
Product Manager
T.E. West, LLC.
-----Original Message-----
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On
Behalf Of Mark Langford
Sent: Friday, August 04, 2006 12:07 PM
To: KRnet
Subject: Re: KR> Subaru engines
Fred Johnson wrote:
> Hey Mark, since it is so quiet today, do you know of anyone
successfully
> using either a Subaru or Geo engine in a KR?
Steve Makish and Bob Lester have a lot of hours on a Subaru (don't know
exactly which one). They were big proponents until Steve wore his case
out
a couple of times at about 300 hours. His opinion is that they can't
take
the RPMs, and are not worth the trouble. He's now flying a Corvair.
He's
not on the list but his email address is srmak...@aol.com if want to
email
him direct and ask his opinion.
Yes Ken Thomas also had a Subaru and is now running a Jabiru, and is
happy
with it. Dave Stroud weighed a Subaru engine installation firewall
forward
and came up with 285 pounds, substantially more than "they" tell you
it'll
weigh. The Corvair is about 245, by comparison.
My 2 cents worth, but I've never flown behind a Subaru, so take it for
what
it's worth...
Mark Langford, Huntsville, Alabama
see KR2S project N56ML at http://home.hiwaay.net/~langford
email to N56ML "at" hiwaay.net
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