Startup tanks
#1
Thread Starter
Startup tanks
I have run a search to find info about startup tanks. I came across an interesting suggestion that, instead of having a clunk line inside, if you feed from the bottom of the tank then you can flip it upside down to clear the lines before disconnecting. This sounds like a very good idea to me.
The question I have regards the overflow tank vent using this method. If this is at the top of the tank then all is fine during normal operation. When you flip the tank upside down prior to disconnection the vent will now be placed at the bottom of the fuel (I am assuming a pipe vent similar to a regular glow tank rather than a hole). Will this cause excessive restriction or will the tank still vent ok through the fuel? (I hope that make sense).
Are there any other methods people use to limit the amount of fuel coming out of the tube after disconnection?
The question I have regards the overflow tank vent using this method. If this is at the top of the tank then all is fine during normal operation. When you flip the tank upside down prior to disconnection the vent will now be placed at the bottom of the fuel (I am assuming a pipe vent similar to a regular glow tank rather than a hole). Will this cause excessive restriction or will the tank still vent ok through the fuel? (I hope that make sense).
Are there any other methods people use to limit the amount of fuel coming out of the tube after disconnection?
#2
My Feedback: (2)
RE: Startup tanks
If you disconnect your overflow tank while the tank is sitting on the ground, versus while the tank is elsewhere (say sitting on your wing) you will minimize the amount of fuel coming out of the overflow tank - the fuel line will want to drain back into the tank.
#3
My Feedback: (60)
RE: Startup tanks
I do what Ron suggests. It minimizes it. Also, I always wear rubber gloves when I messing with fuel. I rubbed my eyes once while flying had fuel on my fingers. It burns and I blew the gear out of my airplane on landing, and at the time didn't care just wanted to be able to take my jet home. It hurt.
#4
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RE: Startup tanks
I bend the tube down to the bottom, front of the tank and the vent to the top front of your start up tank. Just before disconnecting it stand the tank up on the ground, this way both lines are not in the fuel.
John
John
#5
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RE: Startup tanks
ORIGINAL: siclick33
Are there any other methods people use to limit the amount of fuel coming out of the tube after disconnection?
Are there any other methods people use to limit the amount of fuel coming out of the tube after disconnection?
#6
My Feedback: (48)
RE: Startup tanks
Most guys have the vent coming out of the bottom of the plane. When you disconnect it some residual fuel in the line comes out. I put my vents coming out the side of the fuse as close to the bottom as I can get. Since the vent line is horizontal and there is a slight suction on it no fuel or never more than a drop comes out when you disconnect, and even if some does your hand isn't under it.
Another good reason to put the vent on the side is if you ever have to do gear up landing you won't rip it out of the fuse.
Also I always place the overflow tank on the ground before disconnecting.
Joe
Another good reason to put the vent on the side is if you ever have to do gear up landing you won't rip it out of the fuse.
Also I always place the overflow tank on the ground before disconnecting.
Joe
#7
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RE: Startup tanks
I was a firm believer in side mounted vents, however, fuel tends to get sucked out in flight, and makes a heck of a mess / stains on the airframe...they are both on the bottom now....
I stand my tank on end on the ground before disconnecting....
I stand my tank on end on the ground before disconnecting....
#8
My Feedback: (48)
RE: Startup tanks
fuel tends to get sucked out in flight, and makes a heck of a mess / stains on the airframe
Joe
#11
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RE: Startup tanks
I had this pointed spear sticking out the side of the fuse. The blood made more of a mess than the fuel did...........
Joe
#12
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RE: Startup tanks
Well, it wasn't quite as bad as I made out, but I have a smoke system on board as well, so need two vents. (that smoke oil is really messy when it overflows.) It just worked out far better for me to have them both on the belly.......