fuel tank clunk
10-23-2007, 12:28 AM
#1
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fuel tank clunk
Hello, I am installing a DA-50 into my new 2.12m extra. This is my first gas engine and wondered if I need to take any special precaution with the fuel tank clunk?
I have heard that sintered bronze or felt filters are required for clunk pick ups to avoid fuel foaming, is this true.
cheers Anthony
I have heard that sintered bronze or felt filters are required for clunk pick ups to avoid fuel foaming, is this true.
cheers Anthony
10-23-2007, 06:30 AM
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RE: fuel tank clunk
The only thing that will prevent fuel foaming is a well-padded tank. I filter my gasoline with a sintered bronze klunk in the supply can, and an inline filter in the supply line. I use another sintered bronze filter in the onboard gas tank.
Dr.1
Dr.1
10-23-2007, 06:55 AM
#3
RE: fuel tank clunk
The other thing is you do not want to use the smaller ones. The Yellow tygon fuel line gets a bit stiff over time so the standard clunk you are used to when using glow is not heavy enough. Dubro and several others make a "large" clunk that weighs quite a bit more.
Sintered Bronze and felt clunks are basically filters and nothing more. Personally I use the felt ones that Aircraft International sells as they are nice and heavy and the felt ones actually hold a bit of fuel in them, just in case.
As Dr1 said, one way to stop fuel foaming is to pad the tank well. You also need to balance the prop, both blade and hub, to help smooth out any vibrations which also help the engine make all the power it can. Single cylinder gas engines already have a good amount of vibrations, an unbalanced prop can really add to it
Sintered Bronze and felt clunks are basically filters and nothing more. Personally I use the felt ones that Aircraft International sells as they are nice and heavy and the felt ones actually hold a bit of fuel in them, just in case.
As Dr1 said, one way to stop fuel foaming is to pad the tank well. You also need to balance the prop, both blade and hub, to help smooth out any vibrations which also help the engine make all the power it can. Single cylinder gas engines already have a good amount of vibrations, an unbalanced prop can really add to it
10-24-2007, 06:48 AM
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RE: fuel tank clunk
bubbageates makes good points. I advocate the use of neoprene with gas systems. Tygon hardens with age (within one season) and may split or fall off the fittings.
Dr.1
Dr.1
11-05-2007, 05:08 PM
#5
RE: fuel tank clunk
ORIGINAL: Dr1Driver
The only thing that will prevent fuel foaming is a well-padded tank. I filter my gasoline with a sintered bronze klunk in the supply can, and an inline filter in the supply line. I use another sintered bronze filter in the onboard gas tank.
Dr.1
The only thing that will prevent fuel foaming is a well-padded tank. I filter my gasoline with a sintered bronze klunk in the supply can, and an inline filter in the supply line. I use another sintered bronze filter in the onboard gas tank.
Dr.1
