Convert your propane flow meter to air.

[Terry Keeley]

Got tired of buying bottles so got this little pump on Amazon, hooked it up to a 4S pack and wala, no mo' propane!

https://www.amazon.com/Karlsson-Rob...pressor&qid=1557080196&s=gateway&sr=8-1-fkmr1

https://www.amazon.com/Uniquers-Vacuum-Diaphragm-Compressor-Silicone/dp/B071GL3XXQ

It's an "Airpo D2028B", you might find it cheaper on FleeBay or elsewhere...

 

[RobertDoak]

Terry...this looks interesting....
But how does this work with boats...

 

[michael faszcza]

To set your main needle ,also check for propper cooling restrictions and check fuel system for leaks .

 

[Andy Greene]

Got tired of buying bottles so got this little pump on Amazon, hooked it up to a 4S pack and wala, no mo' propane!

https://www.amazon.com/Karlsson-Rob...pressor&qid=1557080196&s=gateway&sr=8-1-fkmr1

https://www.amazon.com/Uniquers-Vacuum-Diaphragm-Compressor-Silicone/dp/B071GL3XXQ

It's an "Airpo D2028B", you might find it cheaper on FleeBay or elsewhere...

Okay treat me like Im 5 here , my brain is in the rocketry electronics weeds right now working on my L-2 stuff
When I open the link it shows a vacuum type pump, As I recall my old propane flow meter worked on + psi not neg -
Are you just reversing the polarity and creating + psi instead or does an air operated flow meter require neg flow ?

 

[Terry Keeley]

Ya, they say it's a vacuum pump but it sucks and blows too.

 

[Andy Greene]

Ya, they say it's a vacuum pump but it sucks and blows too.

10-4 . It could do double duty for me- I could use the vacuum side to ground test my altimeters too

 

[Mark Bullard]

You may want to consider using a voltage regulator of some type that will carry the current. Set the output voltage at 8 V. As you know the battery voltage will start going down as you use the pump. But this way your pump will stay constant voltage for many runs thus holding the output air constant. Castle make some programmable BEC that would do the job. Or any electronic house would sell regulators for different set voltages.

 

[Terry Keeley]

Ya, they say it's a vacuum pump but it's either/or...

Not a bad idea but I use this little regulator, holds the pressure at 40" pretty steady:

https://www.mcmaster.com/41795k2

 

[Mark Bullard]

That works to.

 

[LeeWininger]

I've got a regulated propane flow meter, and a spare 4s pack. Looks like I can get an adjustable voltage regulator and vacuum pump off Amazon for about $40.... seriously thinking about converting. Any tips learned since this thread started two years ago?

 

[Terry Keeley]

Works great.

I've run mine right off the 4S pack, no issues. I first mounted the pump with some body trim tape but it shook loose a coupla times so I switched to some small Lord mounts (6-32 M/F). Also added a voltmeter, it'll run forever off a 5000 mAh pack.

 

[Chris Thomas]

So the LED display is a voltage readout?

 

[Terry Keeley]

So the LED display is a voltage readout?

Yup. Box is a Plano two pistol case.

 

[Chris Thomas]

Thats a great case for the purpose. Couldn't find any of them online....

 

[dave roach]

Look at Harbor freight tools for the box

 

[Terry Keeley]

Thats a great case for the purpose. Couldn't find any of them online....

Looks like it's been discontinued, maybe find one if you dig around tho:

https://www.amazon.ca/Plano-10088-Guard-Pistol-Case/dp/B0029KDHKY

 

[Wasted wages]

What's wrong with this picture???

 

[LeeWininger]

Today's project, sponsored by Amazon and air conditioning.

 

[Wasted wages]

easy peasy !!

 

[Terry Keeley]

Good for you!