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HelicopterMain Discussion › Fuel Pump powered by your heli starter ?
09-10-2007 08:50 PM  10 years agoPost 21
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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HERE is a link.

NOTE!!! there is false advertising, or atleast very miss leading. The $70 you pay is only for the pump...the base is separate....

its an expensive setup, but if you never want to have to worry about buying another pump, or not being able to fuel your aircraft at the field. then i recommend this pump.

i use This One....same style pump, but it mounts to your field box and runs on either your power panel or a 12V field battery...which is the setup i have.

Shawn
Team Leisure-Tech
Team HelixRC

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09-10-2007 10:36 PM  10 years agoPost 22
cfranks

rrVeteran

Adelaide South Australia

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I agree with Shawn about the Boxxer. I have one but I fly mostly Gassers and they are Glo only.

Charles

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09-10-2007 10:43 PM  10 years agoPost 23
eyeflyhelis

rrElite Veteran

charlotte nc

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you are best to try it first then post to many critiques here

only you have the power to make no difference!

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09-14-2007 10:42 AM  10 years agoPost 24
majorsmackdown

rrNovice

Portland, OR

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added a picture to the beginning of the thread - been using it a few days now (ya not a long term test) but it works awesome, you don't know how much hand cranking is a bore until you do it this way.

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09-14-2007 05:53 PM  10 years agoPost 25
frebou

rrKey Veteran

Montreal / Canada

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very nice.

Could you post some schematic of how you did that. I have an old hand pump I keep in case my electric one fails me... I may try this modification

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09-15-2007 04:44 AM  10 years agoPost 26
majorsmackdown

rrNovice

Portland, OR

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it's pretty simple, I just don't have time to draw it up right now but I'll try to describe..

open your fuel pump, remove the gear train, (this setup is no ball bearings of course but works pretty well so far - lithium grease on everything)... I'd like to redesign it with some standard ball bearing sizes possibly when I have time..

get a heli starter hex adapter - .90 size heli preferred due to larger hole diameter. make a shaft that fits inside perfectly, and cut a notch in the bottom end of the shaft to mate with the impeller shaft. this notched shaft (stub shaft) will be held on center with the pump by a bushing you'll make that has one end opening that fits the stub shaft, and the other end has an opening that fits nicely over the pump's impeller hub. I placed a washer on top of the impeller hub to protect the plastic impeller hub from friction.

now your hex start adapter fits perfectly on the impeller and stays centered.

drill a hole slightly larger than the hex start adapter through the bottom of the handheld pump housing - use the gear pin hole as a guide to center your drill.

the hex start adapter will protrude through the pump housing now - you don't want it to lift out though - so make another bushing that fits snugly over the start adapter, and is the right height to give a few thousandths of clearance inside the pump housing. press fit the hex start adapter into this bushing.

now you're done - everything stays together - everything is loaded with grease and I personally really love how well this works.

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09-18-2007 04:49 PM  10 years agoPost 27
Swoop

rrElite Veteran

Newark, DE USA

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This is a little off topic, but there is a reason that these pumps fail (geartrain). In the warmer months, the plastic expands within the pump. This causes the 2 plastic impeller gears to bind against the brass pressure plate. And as stated, due to the gear ratio, becomes imposible to operate by hand. All you have to do is back off of the set screw that sets the pressure on the brass plate. This screw can be found behind the manufacturer label. There is usually already an access hole cut. As the colder months arrive, you will notice loss of pressure and difficulty priming. Now its time to snug the set screw back in to attain good pressure. I've had no issues with my pump (hobbico) and its over 2 years old. BTW, they all leak a little, no way around that one.

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09-18-2007 09:17 PM  10 years agoPost 28
hornet dave

rrKey Veteran

Cedar Rapids, IA USA

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MK hand pump from central hobbies and forget your pump problems.

I got a fever! The only prescription is MORE 6HV

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HelicopterMain Discussion › Fuel Pump powered by your heli starter ?
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