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pbarker(at)hughes.net
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 Posted: Thu Apr 19, 2007 8:31 pm Post subject: Small Engines |
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What's the lowest horsepower engine anybody has put into an RV-9 and
achieve satisfactory performance? My understanding is that one of the
factory demonstrators uses a 118 hp O-235. I only ask about this because
I'm researching some alternative engines as a plan B in case I can't
find the engine I really want, when I need it, for a price I would
grudgingly pay. Some of the ones I'm looking at are as small as 100 hp,
but I'm concerned that they just may not be enough guts to get the job
done.
I'll take any advice except for "bigger is better". That's already plan A.
Paul
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russra(at)alltel.net
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| Posted: Fri Apr 20, 2007 4:26 am Post subject: Small Engines |
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I talked to Steve Wintworth at Sun & Fun and he told me he has some low time
0320. You may want to give him a call. Last year I purchased my 0320 with
219 since major for 11,500. Ron Russ RV9A E3D
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mike(at)learningplanet.co
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| Posted: Fri Apr 20, 2007 4:52 am Post subject: Small Engines |
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Bill Repucci is installing an o-290. (http://www.repucci.com/bill/
baf.html) You might want to contact him directly.
The original -9A prototype was indeed powered by an o-235, but sadly
it no longer exists.
Regards,
Mike Schipper
www.my9a.com
On Apr 19, 2007, at 11:30 PM, Paul A. Barker wrote:
| Quote: |
What's the lowest horsepower engine anybody has put into an RV-9
and achieve satisfactory performance? My understanding is that one
of the factory demonstrators uses a 118 hp O-235. I only ask about
this because I'm researching some alternative engines as a plan B
in case I can't find the engine I really want, when I need it, for
a price I would grudgingly pay. Some of the ones I'm looking at are
as small as 100 hp, but I'm concerned that they just may not be
enough guts to get the job done.
I'll take any advice except for "bigger is better". That's already
plan A.
Paul
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klwerner(at)comcast.net
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| Posted: Fri Apr 20, 2007 1:47 pm Post subject: Small Engines |
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The O-290 is nearly the same weight as an O-320, but parts for O/H are more expensive (or so I am told).
And it also has less power then the -320. I'd go with a 150hp -320, as there are plenty around. do not archive
---
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bill(at)repucci.com
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| Posted: Fri Apr 20, 2007 5:00 pm Post subject: Small Engines |
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Mike,
I sure wish I was flying but I'm not. The good news is the other O-290
powered -9 owners I've spoken to see exactly Van's numbers with a Catto
prop. 173 mph (at) 75% for the -9A.
Paul, check this thread:
http://www.vansairforce.com/community/showthread.php?t=14854&highlight=O
-235
Bill
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bill(at)repucci.com
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| Posted: Fri Apr 20, 2007 5:00 pm Post subject: Small Engines |
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The O-290 is about 20 lbs lighter, can run auto fuel, etc. About 40% of the parts are from the O-235, 40% from the O-320, and the others are unique to the O-290.
As for parts price, sure, some are more $$$ but how often do you buy a piston or a crank?
In my case I found a zero time O-290 for $3,500. If I could have found a zero time O-320 for the same price, I would have bought it but that was not the case. I've pulled all four cylinders and changed the accessory case so I can install a fuel pump, bought a duel pair of P-mags, and yellow tagged the carb I bought from an air-boat builder. Even with all that, the price is way less than a used O-320.
Here's the deal, and the same goes for the O-235. You will have to do a lot of custom work to install either of these engines as Van's does not make a FwF kit for either of them. I've been working with Van's to give them all the info I have on the 290 installation in the hopes it will help those who follow. It really hasn't been that difficult to do and I can't wait to fly behind this engine.
As for empty weight, every O-290 powered -9A and the one -9 that is out there have come in right around 1000 to 1020 lbs empty and as I said, their numbers match what Van's has posted on their web site.
All good news.
If I were to do it again, I would buy an O-320, if I could find one for a reasonable price. Sorry, but $10,000 for a mid time O-320 isn't reasonable and Paul was looking for inexpensive alternatives, as was I.
There is a local -9A flying with a 108 hp O-235 and he LOVES his plane. The -9A replaces a -6A he gave to his father and he regularly flight plans at 150 MPH and can fly non-stop from OK to NC w/ IFR reserves. In other words, it has long legs.
The ROC is just outstanding for these planes and we quickly forget that a 172 can only climb at something like 650 FPM where as the O-235 can climb at 1,000 FPM (at) GW, which is just outstanding.
Sorry about the long post but all I ever hear is how you must have an O-320 to make these planes fly, that is not so with the -9. Sure I would like the faster speeds the O-320 gives, for Sunday flying and cross country, the 175 mph I expect from my O-290-D2 is still moving right along.
Bill
PS. My engine installation is detailed on my web site. www.repucci.com/bill/baf.html
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dthomas773(at)sbcglobal.n
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| Posted: Fri Apr 20, 2007 5:49 pm Post subject: Small Engines |
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Hi Mike,
My 2 cents worth. The original factory 9 was powered
by an 0-235 lyc and it proved the engineers
performance projections.
It comes down to how much do you want to spend and how
fast do you want to go. I would think it unwise to put
less than 120HP on your air frame but anything between
120 and 160 is just a matter of choice.
I chose an older 150 HP lyc because I got a good deal
on one. It performs well for me. My friend put a new
160 HP on his and it performs better but burns a
little more fuel.
Decide what you want and then go for it.
Dennis Thomas
RV-9 #90164 (the first customer built taildragger)
347 hours and loving it
--- Bill Repucci <bill(at)repucci.com> wrote:
[quote] -235
Bill
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