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Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Fuel Lines and Filling Procedures
01-02-2010 03:28 AM  7 years agoPost 21
jschenck

rrProfessor

La Vista, NE.

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interesting conversation. I put a T fitting in the purge/return line for fueling. I also am leery about pulling the line off the carb and breaking the fitting.

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01-02-2010 03:46 AM  7 years agoPost 22
crash n' burn99

rrApprentice

ottawa, canada

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I am using a dugro fueling valve, super convienient, however I did not put it between the clunk and carb, in case it were to malfunction, I would not want the motor to go lean so I simply capped off the pass through nipple.

It works great and is relatively cheap.
I just made a bracket for it out of broken vibe 90 parts!!!!!!!!!!!

Do proctologists chew there finger nails when there nervouse?

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01-02-2010 04:00 AM  7 years agoPost 23
Helizrule

rrVeteran

Lake Ariel, PA

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Nice job Crash n' burn. Now all you need is an inflight refueling probe to stick in that fuel valve and a Jewel Generator and you can fly forever

One mile of road will take you one mile. One mile of runway will take you anywhere in the world.

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01-02-2010 02:23 PM  7 years agoPost 24
AceBird

rrElite Veteran

Utica, NY USA

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interesting conversation. I put a T fitting in the purge/return line for fueling.

Made my own joint in the return line. No worries about breaking the carb fitting.

Ace
What could be more fun?

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01-02-2010 04:21 PM  7 years agoPost 25
crash n' burn99

rrApprentice

ottawa, canada

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There will be a jewel on there as soon as it becomes available.

I will have to fit my friends scale vario with a inflight refeuling system, so he can come and refule the radical in the air. Then we will have one big funfly and do an endurance flight, 8 hours without landing

LOL!!!!!!!!!!

Do proctologists chew there finger nails when there nervouse?

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01-02-2010 04:23 PM  7 years agoPost 26
crash n' burn99

rrApprentice

ottawa, canada

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Ace that was my worry doing that way too, If you break that nipple off the carb, im not sure it can be easily replaced.

Do proctologists chew there finger nails when there nervouse?

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01-02-2010 04:50 PM  7 years agoPost 27
rbort

rrProfessor

Franklin, MA - USA

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Ah...

Ace, why don't you just pull the return line off the carb with one hand instead of having to use two to seperate the return line joint?

I guess you guys are worried about snapping the carb fittings off while pulling the lines out, but I've never had that issue. If you use the right size tubing, pulling them off is not a bear. If you use a smaller diameter tubing and stretch it to fit too much, then it can be harder yes sure.

But I always pull off the return line to fill the model all day long, and once, at the end of the day, pull off the carb line to empty the tank. As I said in my video of how to start the Spectra-g, one way in, one way out.

Anyway, everyone has their own preferences, so whatever works best for you. I just like to keep it simple and its successful that way for me.

-=>Raja.

MA 1005 Hanson 280, 4129 flts
Spectra 27 3DMax, 3187 flts
Whiplash V1 Hanson 300, 1425 flts
Whiplash V2 Hanson 300, 185 flts

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01-02-2010 05:02 PM  7 years agoPost 28
AceBird

rrElite Veteran

Utica, NY USA

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If you use the right size tubing, pulling them off is not a bear.
I use a tubing that is heavy walled which is difficult to get off. I use it because it insures no air leaks on the suction line. It is not a problem for the return line but why have two different types.

People will argue but I believe you will get better flow from heavy walled tubing because it doesn't kink when bent (a problem that can occur over time).

Edit:
I forgot to mention it is also more important when you are using the bung because there are no barbs on the brass tube that goes through. You could get air leaks. So keep an eye on it.

Ace
What could be more fun?

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01-02-2010 05:27 PM  7 years agoPost 29
CNCjunkie

rrVeteran

Kauai (The Garden Isle), Hawaii - USA

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Pulling the return line from the carb to fill the tank and at the end of the day pulling the feed line to drain works for me as well.

Unless you go all gorilla, you’re not going to break off any fittings on the carb. Of coarse the temps don't vary much year around here, so the Tygon fuel lines stay nice and pliable.

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

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01-02-2010 05:34 PM  7 years agoPost 30
CNCjunkie

rrVeteran

Kauai (The Garden Isle), Hawaii - USA

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I forgot to mention it is also more important when you are using the bung because there are no barbs on the brass tube that goes through. You could get air leaks. So keep an eye on it.
There is an easy remedy for this:

http://www3.towerhobbies.com/cgi-bi...p?&I=LXWH38&P=0

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

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01-03-2010 12:08 AM  7 years agoPost 31
crash n' burn99

rrApprentice

ottawa, canada

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when its -15c i am woried about that plastic carb fitting getting brittle, and the fuel line I use requires putting your foot on the heli and two hands to pull it off in the cold.

LOL!!!!

Do proctologists chew there finger nails when there nervouse?

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01-03-2010 09:09 PM  7 years agoPost 32
AceBird

rrElite Veteran

Utica, NY USA

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Your right, PVC is not very pliable in the cold. I'll stick to my method.
There is an easy remedy for this:
I take it you solder these on? Is the barb the same size as the plastic barb on the carb?

Ace
What could be more fun?

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01-03-2010 09:15 PM  7 years agoPost 33
CNCjunkie

rrVeteran

Kauai (The Garden Isle), Hawaii - USA

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Yes Ace, the barb is soldered on and the 1/8 inch is about the same size as the return line barb.

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

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HelicopterGasser Model RC HelicoptersOther › Fuel Lines and Filling Procedures
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