Fuel tank foams. Any advice? just have a lot of foam or bubbles in rank. Any advice o
02-11-2016, 06:03 PM
#1
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Fuel tank foams. Any advice? just have a lot of foam or bubbles in rank. Any advice o
I have a 50cc Pau extra sp with a Taildragger rc 24oz rtf tank ( fourtitude equal).
when I run the engine I notice when it gets about half tank it starts to foam or lots of bubbles lol. I know this is not good and am looking for a remedy.
I do have 1/4 inch of foam underneath as well as zip tied tank down in two spots. The engine runs fine just wanting some advice on curing this
when I run the engine I notice when it gets about half tank it starts to foam or lots of bubbles lol. I know this is not good and am looking for a remedy.
I do have 1/4 inch of foam underneath as well as zip tied tank down in two spots. The engine runs fine just wanting some advice on curing this
Last edited by Booyah6973; 02-11-2016 at 06:07 PM.
02-11-2016, 06:45 PM
#2
My Feedback: (19)
The easiest cure to insure constant fuel flow to the engine is to use a genuine Walbro in tank felt filtered clunk. Don't use one of the knockoff clunks as some have been known to shed fibers. This stops any bubbles from getting into the fuel line and it will insure you pick up every drop of fuel the clunk can touch.
Gasoline fuels don't normally foam excessively or hold bubbles like glo fuel does so foaming problems are rare with gas engines. You might make sure the tank floor is solid in the airplane and check to see the prop and spinner are well balanced and running true. Maybe change from zip ties to Velcro and adding a bit more foam under the tank might help. Maybe the particular oil or gasoline you're using is prone to foam. Does it foam if you shake the fuel jug?
Gasoline fuels don't normally foam excessively or hold bubbles like glo fuel does so foaming problems are rare with gas engines. You might make sure the tank floor is solid in the airplane and check to see the prop and spinner are well balanced and running true. Maybe change from zip ties to Velcro and adding a bit more foam under the tank might help. Maybe the particular oil or gasoline you're using is prone to foam. Does it foam if you shake the fuel jug?
02-12-2016, 03:09 PM
#4
The easiest cure to insure constant fuel flow to the engine is to use a genuine Walbro in tank felt filtered clunk. Don't use one of the knockoff clunks as some have been known to shed fibers. This stops any bubbles from getting into the fuel line and it will insure you pick up every drop of fuel the clunk can touch.
Gasoline fuels don't normally foam excessively or hold bubbles like glo fuel does so foaming problems are rare with gas engines. You might make sure the tank floor is solid in the airplane and check to see the prop and spinner are well balanced and running true. Maybe change from zip ties to Velcro and adding a bit more foam under the tank might help. Maybe the particular oil or gasoline you're using is prone to foam. Does it foam if you shake the fuel jug?
Gasoline fuels don't normally foam excessively or hold bubbles like glo fuel does so foaming problems are rare with gas engines. You might make sure the tank floor is solid in the airplane and check to see the prop and spinner are well balanced and running true. Maybe change from zip ties to Velcro and adding a bit more foam under the tank might help. Maybe the particular oil or gasoline you're using is prone to foam. Does it foam if you shake the fuel jug?
AV8TOR
02-14-2016, 11:31 AM
#5
I might add to the other suggestions by recommending that you check the balance of the prop and spinner , and check prop tracking.
Any imbalance will cause too much vibration .
Any imbalance will cause too much vibration .
02-14-2016, 06:53 PM
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I have seen a vid of a fuel tank while flying around . You wouldnt beleive it unless you seen it . Found it . Cheers the pope
https://www.youtube.com/watch?v=WtbSqEtLQX4
https://www.youtube.com/watch?v=WtbSqEtLQX4
02-24-2016, 12:43 PM
#7
Senior Member
The genuine Walbro felt klunk as Tr said, is the answer. But I avoid solidly mounting the tank. I typically suspend it in the plane using fabric straps. Regardless, the felt filter eliminates any bubbles.
