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Autography FlightPower . Advantage Hobby . Revolution Models

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Gasser Model RC Helicopters > Fueling - XCell Gasser.
 
 
DangerousDick
Veteran
Location: Cheshire, England

I've just 'inherited' an X-Cell Gasser - Lucky Me

I've checked through the instructions and the plumbing looks to be right, I've got the feed to the carb and the return and the 'vent' at the back. Trouble is, and I don't know if it's right or not, the 'vent' tube is always open.

A couple of questions have 'cropped up' How do you re-fuel the tank (I know it sounds a silly question if you already know but pulling the feed line from the carb every time seems wrong, and this petrol tube is really tough - not as easy as the silicon 'nitro' stuff).

If I want to 'chuck' this bird around a little what is to stop the fuel from syphoning out of the vent tube or is it something I don't need to worry about.

I've played with petrol 'planks' before but this is my first foray into the helicopter gas toys and so far I'm pretty impressed. I've read through a good few posts here already but please 'chime' in if you can think of anything obvious I should look out for (particularly with this model - second hand / worn parts?).

Cheers
Richard.
06-03-2003 Over year old.
 
 
SteveH
rrProfessor
Location: Texas

Richard,

Fuel thru the return line. That way if you have a filter clunk, and you should have one, it won't get poluted if ther is any foreign mater in your fuel.

No significant amount of fuel will come out of the vent line during hard manuevers.

If the fuel line is difficult to remove from the fittings, it is probably old and should be replaced.

Hope this helps,
SteveH
06-03-2003 Over year old.
 
 
Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

Richard, we make a 360º loop in the vent line.
06-04-2003 Over year old.
 
 
cfranks
Veteran
Location: Adelaide South Australia

For filling on all my helis, Gas or Glow, I use the Tettra 3-way tap, never had a problem. Ron Lund sells them. http://www.ronlund.com/Merchant2/me...ct_Code=TET4321

Charles
06-04-2003 Over year old.
 
 
ImRich
Veteran
Location: Derry, NH USA

To fuel my gas X-Cell I place a Du-Bro 'gas' compatible fuel 'port' in my carburator return line.

This allows me to fuel the thing easily. I happened to use a Du-Bro model, but just about any will work.

By Placing it in the fuel return line from the carb, I don't have to worry about it developing a leak of any sort.

If I want to empty the tank, I can do it through this fitting, but I have to tip the heli on it's side/back.

If it was easier to post pictures here, I'd do it to show you, but it's easy to do and works well.
06-04-2003 Over year old.
HOMEPAGE  
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

How to gas it up

Fuel the heli through the return line from the carb. Tilt it while fueling so that you can fill the tank to the top and not have it overflow from the vent line.

The vent line should rise straight up above the tank about 1 inch and then do a 180 degree turn and go straight back down just past the skid brace. With that rise, and the carb pumping fuel while the engine is running, no fuel will ever spill out in flight. I 3d my gasser all the time and I tumble and roll it alot and never had issues with losing fuel from the vent line.

At the end of the day, disconnect the line from the carb end and attach it to your fuel can. Pump the carb bulb to empty the gas from the carb and return all the fuel to the tank. Then, pump the fuel out of the tank through your filter which is coming to the carb. (you should have a filter). This way fuel flow is only way one, IN from the return, and OUT from the tank to the carb through the filter. You DONT want to fill it from the carb side at all the "dirt" will collect on the near side of the filter if any and then go right into the carb when you start the engine.

Make sense?

Enjoy! This is a great bird and I've had mine since 9/97 and have logged 943 flights to date. I absolutely love it and would never trade it for a glow ship.

-=>Raja.
06-04-2003 Over year old.
 
 
RLO1
Senior Heliman
Location: Chandler, AZ

Just to be the devil's advocate....... I fill through the fill line using a tee and a short leg that I plug during flight on my Vario and Xcell gassers. I never have had a problem with air leaks because I use good fittings. It also primes the fuel line and carb. It also helps during defueling because I do not like to leave gasoline (coleman fuel) in my carb or fuel lines. You can use the carb pump to empty the fuel lines if you want, I just prefer to suck it out when defueling.

I never use inline filters. I use a filter on the jug pickup line before the fuel enters the aircraft. My feeling is that if the fuel goes in clean, a filter is not needed on the bird. This philosphy have served me well for 20 years of RC flying.

I don't like fuel valves, its another way for a system breakdown. I like the KISS principal it has worked for me for a very long time.

My two cents.
-Ron
06-04-2003 Over year old.
HOMEPAGE  
 
 
DangerousDick
Veteran
Location: Cheshire, England

Thanks for all the input - it's almost ready to go up but I need to tidy up some servo / gyro wires first. I'll get some new fuel line anyway just to make absolutely sure.

I do remember some advice a few years ago when I had the plank about using PCM receivers - I think it was to shield the plug wire if using PPM and leave it bare on PCM. I've got both but would feel happier using PCM if I can.

Cheers
Richard.
06-04-2003 Over year old.
 
 
ImRich
Veteran
Location: Derry, NH USA

Hi Richard,

I'd like to comment on the PCM/FM (PPM) thing.

It doesn't matter if you are using PCM or PPM, you don't want any electrical interference.

People think that PCM is not affected by noise. That's not true! It's just that PCM will not show interference until it is getting more severe.

If a PCM receiver gets only every other 'frame' of information, then the PCM receiver will ignore the bad frames and simply use the good frames. So you may not know you are getting interference.

Most PPM receivers will use every frame of information. So if ever other frame is bad (due to ignition interference) then your servos will probably start glitching and jumping all around.

The best way to test any system is to do an extreme range check. That is, start walking away from your model and see how far you can go until either the servos start glitching, or their responce slows down. Note this distance and then start your engine and do a extreme range test again. If the distances are significantly different than when the engine is not running, then start looking to solve the problem.

Don't be misled by old-pilots-tales about PPM/PCM. I happen to use PCM in all my more expensive aircraft. I think they are better receivers for many reasons.

---
Rich
06-06-2003 Over year old.
HOMEPAGE  
 
 
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Gasser Model RC Helicopters > Fueling - XCell Gasser.
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