M
Ingenieurbüro CAT, M. Zipperer GmbH +49-7634-5056-800
Wettelbrunner Straße 6
18
79282 Ballrechten-Dottingen
www.jetcat.de
GERMANY
Instruction manual JetCat-PRO engines, 1.7 - V12.01V
Bleed air port (optional) ; Pressurization of fuel tank
The bleed air port can provide compressed air derived from the engines compressor stage.
In order to avoid any possible reverse flow back into the engine, an internal one way valve is provided on the engine
side. As the bleed air can be hot/warm, the use of a Teflon/PTFE tubing for the first 20cm is recommended!
The pressure on the bleed air port depends on the engines operational rpm. On full power a pressure of up to 3,5 bars
can be reached!
In case bleed air is not required/used, please block the outlet by a piece of crimped tubing.
Typically bleed air is used to pressurize the onboard fuel system to avoid degassing/bubbling of the fuel on high
altitude operation of the engine (>5000m).
For full operation of this feature an additional pressure relief valve needs to be fitted in front of the fuel tank in order
not to over pressurize the fuel tank!
The pressure relief valve should have a recommended relief pressure of 0,3-0,7 bars.
Fuel Connection Diagram, pressurized fuel tank
Feeder/Hoppertank
Main-tank
To filling connector
make sure to close after filling!
Large Mesh/Felt
to reject air bubbles
Fuel pickup clunk
Can be large felt clunk or similar
Overflow
Close after filling!
No additional Filter in suction line!
Pressure relief valve
to limit pressure in fuel tank
Bleed a
ir port
