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01-11-2010 01:24 PM  8 years agoPost 21
shawmcky

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Isle of Wight,United Kingdom

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turboomni
The motor was plenty powerful but i found the motor a bit vibey,i think the longer stroke had something to do with it.It is not fully run in and it really needed a better engineered airfame than i was using at the time.I will fit the engine to either a Spectra or Predator to run it in properly.It has not really had a fair test so far.Have a few gassers so it has taken a back seat for a while,you know how it is.

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01-11-2010 01:53 PM  8 years agoPost 22
Carey Shurley

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Orlando, FL - USA

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I assume that was the CY stroked/stuffed crank? Alan built a motor with one of those in it but I could never get it to run smooth. He has a process for adapting the closer to full circle RC motor crank that I'm trying now.

thats one of the promises of the "wally" motor (it really needs a name ya know) in that its supposed to be incredibly smooth. Only time will tell if the masses experience that

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01-11-2010 02:30 PM  8 years agoPost 23
shawmcky

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Isle of Wight,United Kingdom

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Motor
yes it was the Cy crank,i also found it ran best with the needles on the carb closed up quite a bit from the stock settings with the stuffed crank.I think in hindsight it would have been better to use a standard stroke full circle crank,rather than a modified unit.I think wally had similar probs at first with his motor at the time.Maybe QWW engine does not have the problem?

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01-11-2010 02:43 PM  8 years agoPost 24
turboomni

rrProfessor

East of the Equator

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I hope who ever is the first brave person with expendable cash that tries this QWW motor will fill us in on how it runs.
Thanks for the reply Shawmcky

Setup is everything, All my heli's can fly far better than I can pilot them

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01-11-2010 02:45 PM  8 years agoPost 25
Carey Shurley

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Orlando, FL - USA

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Maybe QWW engine does not have the problem?
dunno. I don't know any one who has one and so far this thread hasn't attracted any actual users.

Based on historical experience with the 26 motor, unless they've done some things to balance it I suspect it will also be a shaker especially at the RPM ranges posted in the dyno charts

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01-11-2010 02:47 PM  8 years agoPost 26
CNCjunkie

rrVeteran

Kauai (The Garden Isle), Hawaii - USA

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thats one of the promises of the "wally" motor (it really needs a name ya know) in that its supposed to be incredibly smooth.
It does have a name, The HYPER G27CC PUH

Just another crappy day in Paradise....Aloha!

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01-11-2010 02:51 PM  8 years agoPost 27
shawmcky

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Isle of Wight,United Kingdom

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Must admit
Had far better results with tweaked 23cc motors,which i prefer.

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01-13-2010 02:16 PM  8 years agoPost 28
Justin Stuart (RIP)

rrMaster

Plano, Texas

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It does have a name, The HYPER G27CC PUH
I prefer the name "Wally Motor". It rolls off the tongue much better.

As for this QWW engine, why would you spend $475 on a totally untested engine when you could buy a name brand engine for essentially the same price? Maybe if the price was something around $350, but not $475. That's too much money to gamble with.

I agree with Ace that the HP graph is more of a marketing ploy. I think this engine is really more of a marine race engine. You would need nearly an 8:1 gear ratio to make best use of the engine's peak HP, and at this RPM something tells me the motor would only last a few flights.

Avant RC
Scorpion Power Systems
Thunder Power RC
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01-13-2010 02:37 PM  8 years agoPost 29
Carey Shurley

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Orlando, FL - USA

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at this RPM something tells me the motor would only last a few flights.
I wouldn't be too sure about that, the boat and go-ped guys routinely turn these things into the 16's. Now thats a bit different than saying that you WANT TO or SHOULD turn it that fast in a helicopter, at least not a single cylinder.

However I agree the published power curve is inappropriate for a helicopter motor as a change of only a few hundred RPM have steep impacts on power output and it seems odd to me that if somebody was going to go to the trouble of running multiple dyno runs why they wouldn't publish the torque numbers which are just as important for helicopter use.

I dunno that the price is outta line, when you say "name brand", there are really only two right at this moment with any real track record on helicopter motors and thats about the going price. I agree though if you're trying to bring a new something to market, you'll get more interest with special pricing.

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01-13-2010 03:08 PM  8 years agoPost 30
shawmcky

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Isle of Wight,United Kingdom

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Torque figures
Does seem strange that the torque figures are not shown with that motor as these are really the more important of the two.

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01-13-2010 03:16 PM  8 years agoPost 31
turboomni

rrProfessor

East of the Equator

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Has anyone asked Erwin at QWW who modifies the motor or is it a secret like lots of other stuff on this gasser forum???

Setup is everything, All my heli's can fly far better than I can pilot them

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01-13-2010 03:20 PM  8 years agoPost 32
Carey Shurley

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Orlando, FL - USA

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not that I know of. Based on some of the recorded phone calls that were posted elsewhere on these forums, I doubt that anybody is standing in line to make such a phone call

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01-13-2010 03:25 PM  8 years agoPost 33
shawmcky

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Isle of Wight,United Kingdom

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^^^
Quite

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01-13-2010 03:26 PM  8 years agoPost 34
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I'll send Irwin a PM and ask him to comment on this thread.

Avant RC
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Thunder Power RC
Kontronik Drives

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01-13-2010 03:29 PM  8 years agoPost 35
shawmcky

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Isle of Wight,United Kingdom

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Make that call
Wheres my umbrella

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01-13-2010 06:11 PM  8 years agoPost 36
Toxic Al

rrApprentice

chuluota, Fl

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I have tested the stuffed and stroked stuffed cranks from cy and while they worked fine for goped guys they don't well in the boats or the helis. the standard stuffed crank that i put in carey's motor was not happy at all. the rc crank(zenoah) works much better but has to be adapted to the engine. Asa far as the hp chart i don't publish mine because numbers are not what they seem and dyno's can be fooled with to say whatever you want, but the power curve is way to steep and at the wrong peak rpm. the motors for heli's need wider power curves and peak lower to the given rpm range intended.Torque is the name of the game and while stroking gives a torque adtvantage it can also increase vibes if the crank is not designed around the new stroke which all but wally's are not. and we spin the marine engines over 18k. and before someone gets mad i am not saying anthing bad about this motor but what I have experienced in testing myself. I wish him the best in his new endeavor.Peace, Toxic Al

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01-14-2010 12:30 PM  8 years agoPost 37
shawmcky

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Isle of Wight,United Kingdom

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Toxic Al
Which engine over the years and in your experience have you found to be the most succesful for heli applications?Which one have you been most pleased with overall?(Your engines 23/26)where do you think the future is?

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01-14-2010 01:50 PM  8 years agoPost 38
Toxic Al

rrApprentice

chuluota, Fl

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The 231 by far has been my best seller but not because it is a better engine. most people don't know about my 260 but the guys who have them have been happy with those too. I have even done a 29 for the vario xlv which is a powerhouse. the 231 motor will let you run a wider range of ratios where the 260 and bigger tend to be limited to rpm but produce better torque. I have talked to wally and he really seems to have the crank for the 27 dead on from what we talked about. I am working with a couple of people testing different set ups for a large range of choppers because there are so many variances. Size, ratio(gear),weight, intended use, blade length can also play into it. I think Irwin has torque on the brain as do i and Wally but retrieving it without vibes and without sacrifice in power curve and intended rpm range is the trick. the new 20 platform really excites me and i am really hoping that other heli manufactures step up because this going to get interesting. Peace, Toxic Al

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01-14-2010 02:04 PM  8 years agoPost 39
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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Thankyou
for your answer and perspective,2010 could be the year of the gasser

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01-14-2010 02:59 PM  8 years agoPost 40
Quick Worldwide

rrKey Veteran

Coopersburg, PA

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Let's make it better
Mr. Toxic your attitude it seems is the true toxicity. You have the right to your opinion but not at someone's else's expense.

I believe You are the same person that told our customers & RR that EI'S are no good...How many 20CC engines are now flying in the states with great success. We have over 50 machines with 26CC stock engines ALL with EI & performing beautifully. Maybe it is our patented engine mount dampening system.

I don't knock you & why should you put QWW & me down. I am only trying to improve the performance of the gassers. Our job is to produce high quality helicopters & supporting accessories.
There is not question modified Zenoah engines perform much better than stock. The additional cost is well worth it.

WE are now working on the the 20CC to double the HP. We have 27CC engines in stock now to test & show that there are good alternative
sources. We made the first 20CC 4 years ago maybe some really wants to do a honest comparative build between the Bat 20 & the Century.

If interested please PM me...

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