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NYTerminat(at)aol.com
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 Posted: Sat Dec 29, 2007 1:21 pm Post subject: Trying an unproven engine - is it feasible, is it safe? |
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Does that also apply to the Wright Brothers who were bicycle mechanics???????????????
In a message dated 12/29/2007 1:06:25 P.M. Eastern Standard Time, wr.giacona(at)suddenlink.net writes:
| Quote: | --> Zenith-List message posted by: "Gig Giacona" wr.giacona(at)suddenlink.net (wr.giacona(at)suddenlink.net)
2."Would I be better off going with a more proven conversion like the Suzuki/Geo or go with the 912?"
Statement 1 pretty much stands on it's own. There is no mention that he has ANY experience with aircraft mechanics. He's not even a pilot.
Statement 2 seems to show that he is just trying to come up with an aircraft he can fly. I will be anyone here $100 that should the original poster ever try to build a 701 or any plane with the engine he described it will never get off the ground.
I'm hardly against conversion engines. But those that go about designing such conversions need to either have at least some experience with aircraft power plants or a real strong background in engineering.
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W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=154875#154875
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top rated recipes and easy ways to stay in shape for winter.
[quote][b]
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Joemotis(at)aol.com
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Trainnut01(at)aol.com
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| Posted: Sun Dec 30, 2007 2:01 am Post subject: Trying an unproven engine - is it feasible, is it safe? |
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Terry
IN a word-AMEN!
Carroll
top rated recipes and easy ways to stay in shape for winter.
[quote][b]
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ifly4fun2(at)sbcglobal.ne
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| Posted: Sun Dec 30, 2007 5:50 am Post subject: Trying an unproven engine - is it feasible, is it safe? |
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Damn well said Terry, I totally agree. If the member chooses to build an airframe/powerplant
combination as such lets support him rather than deter him from his dream.
Art
--- Terry Turnquist <ter_turn(at)yahoo.com> wrote:
| Quote: | The golden years of experimental aviation reached it's peak (probably in the sixties and
seventies) and went into a steep decline, which is now reflected in the false illusion that
safety is achievable only by using factory built parts.I wasn't a builder then, but you can
imagine a lone figure toiling in his garage on a project, with no Internet, no builder forums,
few good reference books, but a lot of ingenuity and common sense. Those days are long gone.
Many pilots will just shell out the ninety grand for a factory built sport plane and leave the
building to the few true experimenters who love to create. There's nothing wrong with that
approach but don't try to stifle the enthusiasm of the guy who wants to try to build his own
dream with limited resources but a lot of heart.
When many in my fathers generation dreamed of home ownership they bought a piece of land, and
took shovel to dirt and started building. Now we're told you have to have an Architecual
drawing, soil analysis by a professional and a certified landscape company to plant your grass,
and whatever you do, don't try to do your own interior decorating, the paint fumes may explode!
This afternoon we should all tip our glass to the guys that went before and flew that creation
with the model "A" engine sputtering while spinning that homemade wood prop!
Terry Turnquist
601 XL Plans
St. Peters, MO
Joemotis(at)aol.com wrote: In a message dated 12/29/2007 10:06:04 A.M. Pacific Standard Time,
wr.giacona(at)suddenlink.net writes:
http://forums.matronics.com But those that go about designing such conversions need to either
have at least some experience with aircraft power plants or a real strong background in
engineering.
I disagree, trial and error teaches many things. And it would be
great to see this 150 HP in an aircraft. Quite a lot is already
known about conversions and heck, a redrive is the same
thing in principle as the jackshaft I installed on a Bonaza mini
bike toaccomadate the Hodaka Ace 90 that was replacing the Mac 9.
This Yamaha 4 stroke seems to me a good place to start if
one was so inclined.
Many a failed attempt at something quite often turns out be
quite an educational experience.
Joe Motis
Do not archive
http://i83.photobucket.com/albums/j311/jdmotis/Genesis150_tcm26-67175.jpg
top rated recipes and easy ways to stay in shape for winter.
---------------------------------
Never miss a thing. Make Yahoo your homepage.
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lrm(at)skyhawg.com
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| Posted: Sun Dec 30, 2007 6:59 pm Post subject: Trying an unproven engine - is it feasible, is it safe? |
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The main reason I would buy a new snowmobile is because I know I would have every part I need except the PRSU. Exhaust parts, radiator and more. When you don't know exactly what you need, those little things will nickel and dime you to death. And I doubt I could buy too many wrecked parts around here, in fact I've never seen a snowmobile in Arkansas. We have a whole lot of those skidoos and alike, but I think their cooling system is too different.
The only real down side to most conversions that no one has mentioned is insurance. You can't get it with an unapproved engine. It's a big risk. I found that out when I tried to insure my skyhawg.
Anybody out there think there might be a market for a airboat with a Harley on it? LRM www.skyhawg.com
[quote] ---
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Gig Giacona
Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA
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| Posted: Mon Dec 31, 2007 6:46 am Post subject: Re: Trying an unproven engine - is it feasible, is it safe? |
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I've lived here all of my 40+ years and I haven't either. Not a lot of call for them. Thank GOD!!
| lrm(at)skyhawg.com wrote: | ... in fact I've never seen a snowmobile in
Arkansas. |
DO NOT ARCHIVE
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_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR |
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planecrazydld(at)yahoo.co
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| Posted: Tue Jan 01, 2008 5:34 am Post subject: Trying an unproven engine - is it feasible, is it safe? |
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as long as you are going for a new combination, why not the russian gearbox that air-trikes sells? They seem to be pretty robust and appear to be flying on many different engines...
Carl <cgbrt(at)mondenet.com> wrote:[quote] --> Zenith-List message posted by: "Carl"
Hi Randy.
Two 701 builders here in Ottawa Cda are using the 4 cyl 4 cycle Yamaha
engine. One is out of a jet ski the other from a snowmobile. Someone in
Montreal built redrives for them. One a/c is due for completion in 2008 and
the engine has started ground testing.
The idea of using the Rotax gearbox is good in terms of reducing the risk of
using a combination of non aviation engine and newly designed redrive. In
terms of gear ratio, I believe they plan to run the Yamahas at about the
same RPM as the Rotax 912 (5800 to 6000). One limitation on the basic 701
design to consider is 200 lbs and 100 HP max for the engine. As far as
thrust loads on the engine and the mount I would also recommend including
gyroscopic loads generated by the engine, redrive and prop.
My brother, a snowmobile enthusiast, told me these engines have a good
reputation and Yamaha has released a three cylinder version that may even be
lighter and could also be a good match for the 701.
Carl/701/912
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