OS 120ax fuel tube
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OS 120ax fuel tube
Hi all. just wondering from those out there with the 120 what sized fuel tubing you are using? Manual says approximately 2.5mm inner diameter tubing but I can find an exact match. The closest is 3/32 tubing however that comes in at 2.3mm in diameter.
What does everyone reccomed for this sized engine? Putting it in a goldberg ultimate bipe. Cheers!
What does everyone reccomed for this sized engine? Putting it in a goldberg ultimate bipe. Cheers!
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RE: OS 120ax fuel tube
I've been using 3/32 for over a year now and it works fine.this engine uses the same amount of fuel as my 61, so larger tubing is not needed.
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RE: OS 120ax fuel tube
Great in that case I am sorted as I have a TONNE of greatplanes 3/32 tubing! How is this engine without a pump is the fuel tank is up front? I have heard it generates quite good fuel draw without a pump. Planning on using a 10oz tank with it (plenty of space up front in the ultimate for a bigger tank). Just curious about the pump in terms of if the plane ends up a lil nose heavy and have to move the tank back a wee bit!
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RE: OS 120ax fuel tube
ORIGINAL: fallingleaf
Great in that case I am sorted as I have a TONNE of greatplanes 3/32 tubing! How is this engine without a pump is the fuel tank is up front? I have heard it generates quite good fuel draw without a pump. Planning on using a 10oz tank with it (plenty of space up front in the ultimate for a bigger tank). Just curious about the pump in terms of if the plane ends up a lil nose heavy and have to move the tank back a wee bit!
Great in that case I am sorted as I have a TONNE of greatplanes 3/32 tubing! How is this engine without a pump is the fuel tank is up front? I have heard it generates quite good fuel draw without a pump. Planning on using a 10oz tank with it (plenty of space up front in the ultimate for a bigger tank). Just curious about the pump in terms of if the plane ends up a lil nose heavy and have to move the tank back a wee bit!
don't forget to balance with the tank empty! an empty tank will make lil to do difference in cg.... (if moved only by an inch or too..)
Steven
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RE: OS 120ax fuel tube
Great. Are the pitts mufflers (bisson etc) good with this engine or is it better to use the powerbox muffler. I have a feeling that the powerbox won't fit under the ultimate cowel so might get the pitts one as it is far slimmer. is the engine still as reliable with a pitts in terms of back pressure, fuel draw etc?