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03-12-2013, 06:28 PM
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#1 |
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RCC Expert Contributor
I am: Dave C
Join Date: Jan 2006
Location: Pitt Meadows,B.C.
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DX-18 # of RCs: 40+
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HELP, please....Irritating problem
Hi Guys.
I have an unusual problem that's driving me nuts! I have 2 Zenoah G26 EI 's, one on a Rascal 110, one in a H9 1\4 scale S\Cub. Original ignition changed over to RCXL conversion kit ,timing set to 28deg., CM6 plug, Hayes 16 oz. tank, both motors are the same. They have at least 3 gallons throught them maybe more on the Rascal. The other one saw duty in a Gee Bee for a great many flights had the same problem as described below. They start great, idle very nicely, good top end...18\6 prop @ 8600...they run flawlessly! They both have different kill switch arrangements, and different fuel fill arrangements. The plugs are dry and darkish tan colour. Here is the issue, and it's the same for both engines, when I land and the plane stops at the end of the roll-out,, the engines just shut off!. They will restart immediately and idle perfectly for ever. I tuned the carbs by leaning the low end until the transition hesitated, then richened 1\16 turn, the top was peaked and backed off maybe 1\16 turn. Maybe someone has some thoughts on this as I am pulling out what little hair remains!!! Cheers, Dave.
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Dave C Pitt Meadows B.C. maac 37241 |
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03-12-2013, 08:36 PM
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#2 |
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RCC Supreme Contributor
I am: David C
Join Date: Jul 2010
Location: Morewood, ON
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DX18 Stealth Taranis X9D+ DX3S # of RCs: 1E
Feedback: 94 / 100%
Posts: 4,912
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Re: HELP, please....Irritating problem
Is your fuel sloshing forward as you come to a stop and uncovering the pick-up?
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No Bounce-No Play The one who dies with the most toys wins! Electric flying is pretty much seeing how close to a dead short you can run without setting it on fire. 34453  Weather Station |
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03-12-2013, 09:13 PM
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#3 |
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I am: William A
Join Date: Mar 2006
Location: York, on
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Re: HELP, please....Irritating problem
Sounds like a fuel feed problem to me as well Dave. Here's an idea...phone Bill in Abbotsford.
 Bill
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''engine hoarder'' |
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03-13-2013, 09:38 AM
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#4 | |
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RCC Expert Contributor
I am: Dave C
Join Date: Jan 2006
Location: Pitt Meadows,B.C.
Radio of choice:
DX-18 # of RCs: 40+
Feedback: 15 / 100%
Posts: 885
Total Props: 12
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Re: HELP, please....Irritating problem
Quote:
There's still lots of fuel left in the tank, but a Walbro carb will run the engine for quite a while with the fuel line disconnected. Plus, if it was starving for fuel, why does it restart in one flip? Puzzling problem. Cheers, Dave.
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Dave C Pitt Meadows B.C. maac 37241 |
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03-13-2013, 09:40 AM
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#5 | |
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RCC Expert Contributor
I am: Dave C
Join Date: Jan 2006
Location: Pitt Meadows,B.C.
Radio of choice:
DX-18 # of RCs: 40+
Feedback: 15 / 100%
Posts: 885
Total Props: 12
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Re: HELP, please....Irritating problem
Quote:
Mr. P and I have gone through all the scenarios we can think of. Cheers, Dave.
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Dave C Pitt Meadows B.C. maac 37241 |
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03-13-2013, 10:35 AM
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#6 |
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RCC Supreme Contributor
I am: Dale Hunter
Join Date: Jan 2009
Location: Camrose, Alberta
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a 12 X in each hand ! Feedback: 23 / 100%
Posts: 8,579
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Re: HELP, please....Irritating problem
Cowlled ehh.
The small vent on the fuel preasure regulator see's changing ambient atmospheric preasure. When you come to a stop the ram air preasure inside the cowl changes. Drops, and for a moment the preasure regulator releases a surge of fuel, floods. The cure is one of those carb vent modifications. I'll look around for a like for you Dave. http://prme.nl/forum/viewtopic.php?t=205 Start here. But if it is not cowled, ignore me. -Dale- 100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
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FishFly - FunFly, Sept 11-13. Great fun! Trout Farm Flyers. Life is good. 
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03-13-2013, 10:50 AM
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#8 |
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RCC Supreme Contributor
I am: Jonathan M
Join Date: Dec 2004
Location: Aylmer, Ontario
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Re: HELP, please....Irritating problem
Hey Dale thanks for the link, that is very good information on air intake problems by Pe Rievers.
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Vintage Mini owner/lover Better To Be divided by TRUTH, Than United In Error. Elgin Flyers, St. Thomas, Ontario Maac#45310 |
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03-13-2013, 11:04 AM
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#9 | |
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RCC Supreme Contributor
I am: David C
Join Date: Jul 2010
Location: Morewood, ON
Radio of choice:
DX18 Stealth Taranis X9D+ DX3S # of RCs: 1E
Feedback: 94 / 100%
Posts: 4,912
Total Props: 110
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Re: HELP, please....Irritating problem
Quote:
__________________
No Bounce-No Play The one who dies with the most toys wins! Electric flying is pretty much seeing how close to a dead short you can run without setting it on fire. 34453 Weather Station |
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03-13-2013, 11:32 AM
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#10 |
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RCC Supreme Contributor
I am: Dale Hunter
Join Date: Jan 2009
Location: Camrose, Alberta
Radio of choice:
a 12 X in each hand ! Feedback: 23 / 100%
Posts: 8,579
Total Props: 39
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Re: HELP, please....Irritating problem
This is the Canadian way.
http://www.thunderboltrc.com/tutoria...ial_seven.html My opinion, is that indicates not enough cowl exhaust 3:1 ratio exit. Old rule of thumb from the C/L Rat Race days. Glad to help.  -Dale- 100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3
__________________
FishFly - FunFly, Sept 11-13. Great fun! Trout Farm Flyers. Life is good.
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