RunRyder RC
 6  Topic Subscribe
WATCH
 1 page 1110 views POST REPLY
GLOBAL 3D ProModeler
HelicopterBeginners Corner › Importance of Nitro Fuel Pickup Line Inside Tank
04-22-2016 12:05 PM  14 months agoPost 1
jackp332

Key Veteran

Claremont, Nh USA

My Posts: All  Forum  Topic

I just wanted to share an experience from last night for all the new-to-nitro guys who might not be aware of the importance of replacing your in-tank fuel pickup lines regularly. These lines will degrade every few gallons of fuel or so, break off inside the tank, and leave you in a motor out situation mid air with a tank still half full of fuel.
Last night I was flying my trusty Raptor that had been stored since last fall (and flown alot last season). I gave it a good check over before heading to the field and was confident everything was in order. I flew 3 good flights and all went well. It felt great to be back out again and my confidence was building. For my last flight I started shooting some autos to end my session. As a common practice, each time I land and take off into a hover again, I fly in front of myself and visually check the fuel level in my MAIN tank. I had been flying quite a while and I did notice the motor surging a bit on my last hard ascent to auto-altitude but figured it was just working out some 'storage cobwebs'. (Please don't ever assume this as I did with my over - confidence) Anyways, after I landed the auto I figured "Just 1 more and we will call it a day!" As I hovered in front of myself and observed a 1/4 tank of fuel in my MAIN tank still I thought, "wow I should be almost out by now".... As I was about to turn out and ascend hard I noticed my HEADER tank was almost bone dry. Crap! I knew immediately what the surging was (the engine was sucking air through the pickup line and about to run out of fuel from the header tank) and landed asap. Upon inspection at home my suspicion was confirmed as I found the pickup line in my MAIN tank was degraded and broke off, thus leaving the 1/4 tank of fuel still while my engine burned up what was in the header tank.
This is common knowledge for experienced guys but often overlooked by beginners. Guys, if you have a few gallons through that new nitro heli or its been stored for a while- replace those lines! Happy flying

PM  EMAIL  GALLERY  Attn:RR
04-22-2016 11:50 PM  14 months agoPost 2
don s

Key Veteran

Chesapeake, VA

My Posts: All  Forum  Topic

Storing the tank full helps the tubing last a little longer.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

PM  EMAIL  GALLERY  Attn:RR
04-22-2016 11:56 PM  14 months agoPost 3
jackp332

Key Veteran

Claremont, Nh USA

My Posts: All  Forum  Topic

Interesting- I would never have thought to do that. One pilot at my field swears by filling the tank completely when done for the day, then draining the tank for storage. He says this purges it of the exhaust gasses...

PM  EMAIL  GALLERY  Attn:RR
04-23-2016 12:00 AM  14 months agoPost 4
don s

Key Veteran

Chesapeake, VA

My Posts: All  Forum  Topic

purges it of the exhaust gasses...
Yep. That's what kills the tubing.

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

PM  EMAIL  GALLERY  Attn:RR
04-23-2016 02:11 AM  14 months agoPost 5
ICUR1-2

Elite Veteran

Ottawa, Ontario

My Posts: All  Forum  Topic

that over confidence/assumption is what will get you every time.

I store with a full tank,the lines will last for years.
never dry store ! if you're using exhaust pressure.

burnt fuel produces nitric acid

how's that for a psm

spending time, paying attention

PM  EMAIL  GALLERY  Attn:RR
04-23-2016 02:17 AM  14 months agoPost 6
Steve Graham

Senior Heliman

Denver, CO

My Posts: All  Forum  Topic

I guess this is one of those YMMV things. I run a pressurized system, OS 105 HZ-R, so there is never any burned fumes in my tank. I keep my tank full to keep the lines inside and the rubber bung in good shape. I still find I need to replace the lines inside the tank probably about twice a year or they begin to turn to jelly/rot out and fall off the barbs.

PM  EMAIL  Attn:RR
04-23-2016 02:23 AM  14 months agoPost 7
ICUR1-2

Elite Veteran

Ottawa, Ontario

My Posts: All  Forum  Topic

good point about the YMMV
guess it will depend on usage as well, I take it you fly often ?

spending time, paying attention

PM  EMAIL  GALLERY  Attn:RR
04-23-2016 02:40 PM  14 months agoPost 8
don s

Key Veteran

Chesapeake, VA

My Posts: All  Forum  Topic

I need to replace the lines inside the tank probably about twice a year
Brand?

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

PM  EMAIL  GALLERY  Attn:RR
04-23-2016 04:55 PM  14 months agoPost 9
Steve Graham

Senior Heliman

Denver, CO

My Posts: All  Forum  Topic

The Lynx thin designed for use with the MOAS. I'm sure the thin does wear out quicker. Even the thicker lines on my fuel jug and external carb plumbing slowly degrade over time though. Lately I've used a thicker tubing that is still flexible, just not as much as the Lynx. It does seem to last longer and doesn't appear to affect the functioning of the MOAS. I believe once the felt is full of fuel it has enough weight to sweep the tank even with slightly stiffer line.

I think the original point stands. Make sure your internal fuel lines are in good shape. The only way to really do that is to take them out of the tank. At that point it's cheap insurance to just replace them.

PM  EMAIL  Attn:RR
04-23-2016 07:47 PM  14 months agoPost 10
artimus

Key Veteran

Buckley WA

My Posts: All  Forum  Topic

When I fill the tank after the last flight to get the exhust gasses out of the tank , I pull the pressure line off the muffler so I DONT load the muffler with the gasses your trying to get rid of. Then just draw it back in when you empty the the tank for storage. You get fresh air in the tank and the tubing last much longer....

Fly Hard......Team Viagra

PM  EMAIL  GALLERY  Attn:RR
04-23-2016 08:36 PM  14 months agoPost 11
jackp332

Key Veteran

Claremont, Nh USA

My Posts: All  Forum  Topic

That's a very good idea.

PM  EMAIL  GALLERY  Attn:RR
04-25-2016 01:51 AM  14 months agoPost 12
martinrcnitro

Heliman

Mirabel, Quebec, Canada

My Posts: All  Forum  Topic

good things

Nitro Flyers

PM  EMAIL  Attn:RR
04-25-2016 05:05 PM  14 months agoPost 13
artimus

Key Veteran

Buckley WA

My Posts: All  Forum  Topic

Once I had a engine lean out then settled down then lean out again...thought a glow plug was going....truned out it was a pinhole in the clunck line.
The Engine lean out in flight is more than likely is from a crack in fuel tubing sucking air and will come and go when fuel covers the hole in the line. After that I back blow some air into the tank from the line the goes to the carb to see if any bubbles show up in the tank. Some simple checks and matinance can save you a lot of headaches.

Fly Hard......Team Viagra

PM  EMAIL  GALLERY  Attn:RR
11-21-2016 07:24 PM  7 months agoPost 14
Richardmid1

rrProfessor

Leeds, England

My Posts: All  Forum  Topic

I have always left the tank full, I have never had to change the fuel line in 12 years... But then I have never kept a heli longer than about 3 years. Haha

60% of the time, it works every time!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
11-29-2016 03:03 AM  6 months agoPost 15
Rockin Bird

Heliman

St Gabriel, La

My Posts: All  Forum  Topic

old fuel lines

Thanks for the info,its been aleast a year with no fuel in all of my nitro tanks.Time to re-group.

That sweet smell of "Nitro"

PM  EMAIL  GALLERY  Attn:RR
03-23-2017 12:00 AM  3 months agoPost 16
DUCDOC

Heliman

Omaha

My Posts: All  Forum  Topic

I change out my fuel lines every season. I tend to burn somewhere between 10 and 15 cases of fuel per season at 4 gallons per case. As long as you store the tank full of fuel the lines should last an entire season of flying.

Gabriel Sandoval Synergy Field Rep. Rail Blades, Scorpion Power,Team JR

PM  EMAIL  GALLERY  Attn:RR
WATCH
 1 page 1110 views POST REPLY
Scorpion Power GLOBAL 3D
HelicopterBeginners Corner › Importance of Nitro Fuel Pickup Line Inside Tank
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Monday, June 26 - 6:22 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online