Fred: That was designed from the ground up to be an aircraft engine and has a PSRU built in.
Don ------------------------------------------------------------------------ Fred Johnson wrote: > Look at the Rotax though, it is a screamer too. At least to make the > horsepower. > > Fred Johnson > Product Manager > T.E. West, LLC. > > -----Original Message----- > From: krnet-bounces+fred=renotruss....@mylist.net > [mailto:krnet-bounces+fred=renotruss....@mylist.net] On Behalf Of D F > Lively > Sent: Friday, August 04, 2006 12:41 PM > To: KRnet > Subject: Re: KR> Subaru engines > > Netters: > > You raised some valid questions. I have looked @ Subies and observed > that they > get Max torque somewhere in the low 4000s rpm range and Max power at say > the > mid 5000s rpm range. Almost all would requre a PSRU because their > bearing wont > take the prop pull. I would say that running that engine at max torque > for a > redline might have some durability issues as most in cars driver at > highway > speeds run in the 3000 rpm range so my thoughts are that limitting the > revs to > the mid or upper 3000s would be prudent and a PSRU ratio to give a prop > rpm in > the 2700 to 3000 range appropriate for durability. Whether this would > leed to > adequate power availability I can not say. What I liked about the Subi > is the > fact it is liquid cooled which would be nice for cabin heat with NO or a > very > limited risk of CO poisoning. > > I think one must look at the RPM settings of the design and the PSRU > ratios > involved to evaluate engine logevity becuse clearly running an engine at > or > above its max torque RPM will surely work a hardship on engine life as a > general rule. > > My opinion from a reasoned judgement not from experience or personal > knowledge. > > IT is a Safe bet that neither the Corvair or VW based engines will last > as many > hours as they do normally if ran "Flat Out" either. > > Don > > ------------------------------------------------------------------------ > > Mark Langford wrote: > > > 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 > > -------------------------------------------------------------- > > > > _______________________________________ > > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > > please see other KRnet info at http://www.krnet.org/info.html > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
