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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › Standard filter vs Bubbless filter
04-11-2015 03:10 PM  3 years agoPost 1
datidun

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N Ireland

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I did this experiment today on a OS 50 Hyper,max temp on board sensor usually comes in at 160f,seems pretty cool but has good power so leave it at that, usually using a standard 3 way fuel filter,so I put on this new JR bubbless filter,same type of flying rolls loops tick tocks etc and still the same needle settings,came in at a max of 225f,thats a big difference,a bit to high for my liking,so it was back to the standard filter again,158f max,then for the fourth flight back to the JR bubbless landing again at a max temp of 230f,opened the new filter just to check,spotless inside,my question is does bubbless restrict fuel flow in some way.

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04-11-2015 03:18 PM  3 years agoPost 2
Jerry K

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Houston Area

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Anything you change in the suction side of the fuel system will change the needle setting on your engine. Fuel draw is VERY sensative to restrictions and therefore the total flow to the engine. That doesn't mean the item is worhtless, it simply changed the flow that needs to be compensated for in the needle setting.

I am running a fuel magnet and it has been in my 2 helis for over 5 years. I have never had an issue, like others have reported. But I am very careful about re-fueling right after a flight and ALWAYS leave a full tank of fuel between outings.

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04-12-2015 08:13 PM  3 years agoPost 3
datidun

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N Ireland

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Thanx good explanation,I think I will keep the standard filter on instead,was thinking of getting rid of the header,thats why I tried the bubbless filter

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