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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › Fuel line and clamps
10-27-2013 06:20 PM  5 years agoPost 21
wjvail

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Meridian, Mississippi

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http://www.rcbuyerswarehouse.com/minicockballvalve.aspx
http://www.centralhobbies.com/Fuel/fittings.htm

If your budget will tolerate it, don't use a clamp. Use a ball valve. Yea it will cost you $13.00USD to do what a .50c clamp does, but I haven't had one come close to leaking and they don't put stress on the fuel line. Rather than clamp, turn the valve 90deg.

Bill

"Well, Nothing bad can happen now."

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10-28-2013 03:25 AM  5 years agoPost 22
Rob43

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Midland, MI USA

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Those valves are pretty nice. I'd be tempted to install a three way valve between the header and carb to make a convenient refueling point.

Is it best to be frame-mounted?

Rob

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10-28-2013 02:01 PM  5 years agoPost 23
wjvail

rrKey Veteran

Meridian, Mississippi

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Those valves are pretty nice. I'd be tempted to install a three way valve between the header and carb to make a convenient refueling point.
Is it best to be frame-mounted?

Great minds think alike. If the header tank doesn't have a 3rd fitting I will use a 3 way valve. If the engine uses muffler pressure I will put a simple ball valve on the pressure line too. By doing this, at the end of the day, I can fill the tank, close the valves and be sure the fuel lines stay wet, the exhaust gasses are purged from the tank, and the fuel will stay sealed and dry in the heli's tank. The only gotcha is that you must remember to open the muffler pressure ball valve. Since the heli is already fueled for the first flight of the day, and since you might not be in the habit of doing this, it's easy to take off with no muffler pressure. Of course it becomes immediately obvious when the heli is rattly lean.

As for mounting the valve to the frame, I haven't found that it is necessary. Further, I wonder if you might not just end up imparting more vibration to a component for no obvious gain.

Cheers,

Bill

"Well, Nothing bad can happen now."

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10-28-2013 07:05 PM  5 years agoPost 24
Rob43

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Midland, MI USA

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Cool.

I previously used a clamp on the exhaust pressure line for the same reasons you described. I did forget to open it once. The engine went lean and died as I tried to spool up. Then, I realized what I had done and refired the engine. When I was setting down the starter, I bumped the throttle stick and the heli took off...it hovered just a few inches from the ground as I was trying to grab the transmitter and get away from the heli...hahahah....only time I "crashed" that model. LOL. I never forgot that again...

This time, it's a YS....

Rob

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