On-Board Fuel Filter
 

Hello guys, could someone tell this rookie what type/kind of fuel filter I should use on-board and maybe where in the system most of you place the filter? Also what type of fuel filter are you using coming from the fuel can or the taxi tank? Many thanks. Chic

This is my favourite. I plumb it UAT - pump - ball valve - fuel filter - solenoid(s) - turbine.

Some say shutoff before pump as the fear is if you have a runaway pump, you could blow a line off and spray Kero everywhere.

Personally, I don't like anything between the UAT and the pump and use the largest dia tubing as practical.

http://shopbvmjets.com/zencart/index...roducts_id=152

PaulD

Either the supplied filter with the engine (Jetcat - mount it vertically, not on it's side) or
a Sullivan Crap Trap two stage filter.

From my fuelling station I use an automotive in line paper cartridge filter.

I plumb it UAT - ball valve - pump - solenoid - filter - engine.

Australian regs require a radio controlled engine shut off independent of the
engine electronics, I use a servo on the ball valve but the ball valve can still
be used manually. - John.

More chance of the pump spitting something, or chewing something through and the solenoid is what is required to close, so filter after the pump, before the valves/front case (JetCat Rx turbines have valves under the cover) Always used JetCat F-30 type. Assemble filter and re tighten cap next day to take up O ring compression...never needs looking at again, never cleaned out a filter in 10 years.
Do not use Festo clear filters, seen too many leak.

Dave

Thanks guys for all the advice and information. I see where multiple filters are used on-board so I best buy a couple of them. Thanks again. Chic

When you install the filter, besides mounting it upright, the fuel should enter from the bottom. This will move any air bubbles to the top, where they will get pushed through early in the start process.
If the fuel enters the filter from the top, where do the bubble(s) go? Air always rises.
I use the JetCat plumbing sequence:
UAT to fuel pump, fuel pump to filter, filter to solenoid valve, solenoid valve to ball valve, ball valve to turbine.
This way, any small particles of crud or brass from the fuel pump gear wear always goes through the filter before entering the solenoid valve..

Thanks guys, just ordered two JetCat fuel filters from BVM. Will follow recommended advice. Chic

My progress with the build and mounting of the JetCat fuel filter. Again, thanks for the help. Chichttp://www.rcuniverse.com/forum/atta...mentid=1981754http://www.rcuniverse.com/forum/atta...mentid=1981755

Nice clean install. JetCat recommends leaving the filter slightly free, not fixed.

Jerry

Great eye Jerry, I set the fuel filter in a grommet which is just slightly larger in diameter then the filter, there is some, a very some, wiggle room. Again, guys thanks for the advice and kind words. Chic

Another tip....always do full power run up at start of flying session. I did some experiments that showed that, even when you have a jet cat filter full of air AND mounted horizontally, a full power run up is enough to purge air from filter due to high fuel flow rate through filter. That said, I always employ the measures as noted by Dave W and Harley mentioned above.

Thanks guy, all very good advice to follow. Chic