Fuel problem - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-31-2016, 06:57 PM   #11
Glenn Nigh
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Re: Fuel problem


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Thanks Mike but I have to tell you I have had no hang ups with Quadra Got too many of them to change. I know it is a fuel problem and once I learn how to deal with it, it will be as reliable as any motor I have, I have never had a fuel tank mounted as far as this one is below the motor. I'm sure it is " me " that is the problem.
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Old 07-31-2016, 07:11 PM   #12
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Re: Fuel problem

Don't bother blowing into the tank unless you take the line off the carb.

A wise man once said. ". The only thing a quadra is good for is a boat anchor"
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Old 07-31-2016, 07:14 PM   #13
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Re: Fuel problem

You could always put a check valve in the fuel line to prevent it from backing out.

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Old 07-31-2016, 07:29 PM   #14
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Re: Fuel problem

Yup , Joe . Did mention that , with Festo being the easiest and smallest but your link is the cheapest.

http://www.dreamworksrc.com/catalog/...Mm-Check-Valve

You will have to know the OD of the fuel line as the line is cut and the festo inserted into the line. DreamWorks carry most sizes. Might also check with Altecair RC and Thunderbolt RC.
The other thought is you could try chainsaw places that have a good parts supply.

Last edited by stegl; 07-31-2016 at 07:45 PM.
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Old 07-31-2016, 08:27 PM   #15
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Re: Fuel problem

Quote:
Originally Posted by Glenn Nigh View Post
No Dave the pod is full of other stuff. I know if I can get the fuel up once if it stays there it will start. Very, very nice Dave. Is your fuselage built up or fiber glass?
It's a glass hull and short kit from Australia.
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Old 07-31-2016, 10:26 PM   #16
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Re: Fuel problem

I can't say that I have ever seen a tank mounted that far below the engine but it should work. Having been into Walbro carbs lots I don't believe there is anything resembling a check valve in them so it stands to reason that the fuel would eventually drain back into the tank on any engine with a walbro carb.
I have heard of guys taking the screen out of a regular in line model filter and putting a small ball bearing back in to make a check valve.
I also wonder if a unvented 2 oz surge tank in the power pod in series with the main tank would keep it running long enough to get the fuel moving up from the main tank on start up.
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Old 07-31-2016, 11:18 PM   #17
Glenn Nigh
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Re: Fuel problem

I thought of putting a small tank in the pod Merv, not a lot of room but I could build a custom tank there.
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Old 07-31-2016, 11:23 PM   #18
Glenn Nigh
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Re: Fuel problem

Thanks Joe that is what I was looking for. Only I had hopes I could get a check valve locally. We will try to run the motor tomorrow and see how things go . Thanks to all, for the suggestions, most appreciated. Glenn
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Old 08-03-2016, 09:46 AM   #19
Glenn Nigh
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Re: Fuel problem

I found in my collection of parts a check valve ( Joe) I had bought for another project that didn't work out well and added it to the fuel line on the Kingfisher. A choke ( Frank) would have been handy but I did get the Quadra running. Did a lot of checking for interference and all seems ready. I found a bad charging jack on my new H.D. switch harness and have to replace that. The Quadra ran well with lots of power and good idle. Now for the Maiden Flight!
Many thanks to the guys that responded, I used most of the ideas. Cheers Glenn
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Old 08-03-2016, 09:54 AM   #20
Glenn Nigh
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Re: Fuel problem

MOGMAN, Dave that is a great looking airplane. Can you remember the relationship of the motor thrust line to the incidence of the wing? On my model the motor thrust line is up as related to the wing. Glenn
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