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Auto engine conversion with good links for Lycoming operati

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dmasys(at)cox.net
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Posted: Fri Apr 28, 2006 1:31 pm Post subject: Auto engine conversion with good links for Lycoming operati

 	  Quote: 	
		   --- "RV Builder (Michael Sausen)"

 <rvbuilder(at)sausen.net> wrote:

> I still think that it would be an

 > excellent engine for any of the 2 seat RV's.  Not

 > flaming Egg, just stating my opinions along with

 > some facts.

It is amusing to see the Subie dialog applied to the -10 recapitulate virtually every issue that played out on the 2 seat RV lists over the past several years.  Only difference was that the risk scenario was only one other soul on board, rather than three.  

It was the case that since dyno figures were never part of the discussion, most of the inference about horsepower was based on fuel flows.  

For me, the big deciding factors in an auto engine conversion are 1) no longevity data for years to come and 2) the resale stigma.  This sucker is gonna be a substantial capital investment, and if putting a non-aircraft engine does anything reliably to an experimental, it is that it reliably decreases its resale value.  

That said, I am very glad there are pioneers who want to do this.  (in recognition that the pioneers take the arrows and the settlers get the land).

-Dan Masys

#40448

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ericmpmail-rv10(at)yahoo.
Guest

Posted: Fri Apr 28, 2006 2:57 pm Post subject: Auto engine conversion with good links for Lycoming operati

Dan,

I agree - Cessna is the way to go. If it was good

enough for grandpa it's good enough for me. Would you

believe people are putting "experimental" airplanes

together in their garage??? Some of these people

started building before the supplier even finished the

kit or quoted the final cost.

I've even read that some of the early pioneers started

with just a bunch of raw materials and vague plans.

Why they didn't wait for the pre-punched kits is a

mystery.... 

I'm sure the Cessna and Piper owners discuss the risk

scenario of building your own plane all the time.

Acceptable risk is a complex decision that ultimately

everyone has to make for themselves. I think for most

builders, the risk tradeoffs are primarily made in

panels. VFR/IFR/full IFR/ Glass cockpit/ autopilot/

Mode-S Traffic/Oxygen/ TCAS/ TAWS/ Forward looking IR/

?  How much is enough? Does the answer change if it is

2 or 4 souls? Another risk is too much plane and not

enough money left for gas...   

Agree on resale value and lack of dyno data. I think

the aquisition cost can be lower but the resale value

is lower still. Even dyno is not sufficient as

ultimate performance also depends on drag - tied

closely to cooling drag, etc.

Have a great weekend,

Eric

40150 - Working on mating center and forward section

of fuselage.

--- Dan Masys <dmasys(at)cox.net> wrote:

 	  Quote: 	

 <dmasys(at)cox.net>

 > --- "RV Builder (Michael Sausen)"

 > <rvbuilder(at)sausen.net> wrote:

 > 

 >> I still think that it would be an

 > > excellent engine for any of the 2 seat RV's. 

 Not

 > > flaming Egg, just stating my opinions along with

 > > some facts.

 It is amusing to see the Subie dialog applied to the

 -10 recapitulate virtually every issue that played

 out on the 2 seat RV lists over the past several

 years.  Only difference was that the risk scenario

 was only one other soul on board, rather than three.

 It was the case that since dyno figures were never

 part of the discussion, most of the inference about

 horsepower was based on fuel flows.  

 For me, the big deciding factors in an auto engine

 conversion are 1) no longevity data for years to

 come and 2) the resale stigma.  This sucker is gonna

 be a substantial capital investment, and if putting

 a non-aircraft engine does anything reliably to an

 experimental, it is that it reliably decreases its

 resale value.  

 That said, I am very glad there are pioneers who

 want to do this.  (in recognition that the pioneers

 take the arrows and the settlers get the land).

 -Dan Masys

 #40448

- The Matronics RV10-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

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