O.S. Engines 120AX - Manual (Page 11)

20
Suggested fuel tank capacity is approx
350cc. This will allow 10-12 minute flights.
Be sure to use a pressurized fuel system by
connecting the muffler pressure nipple to the
vent-pipe of the fuel tank.
FUEL TANK LOCATION
Make sure that the tank is well rinsed out
with methanol or glow fuel before installation
and that the pickup weight is well clear of the
bottom of the tank when held vertically.
Use a suitable length of best quality 5mm
OD x 2.5mm ID silicone tubing for fuel
tubing.
Fuel plumb end should be10mm away from
the tank bottom.
Locate the fuel tank so that the center of the
carburetor is flush with the center of the fuel
tank.
21
Attention to tank height
Install the fuel tank so that the center of
the carburetor is flush with the center of
the fuel tank.
Approx. 10mm
Plug (commercially available)
For carburetor
For silencer