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 Post subject: Homemade Electric Kite Pump
PostPosted: Sat Nov 24, 2012 10:55 pm 
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I decided that it was not worth spending $300 on a pump so i built my own. I already had the high volume stage which i used to use for my dinghy, and i bought the high pressure stage for $25 (Thanks to info from Spork), and i got the battery for $20. It is essentially the same pump as the Bravo BST 12. works like a charm, pumped my 9m in 2 mins and my 14m in 3.5 mins. the pump can go to 20 psi but i'll never need that much anyways. fun project to build and i saved myself around $200 and i'll never have to pump my kite up again. the two caps in the back allow me to charge the battery with alligator clips without opening the box.


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 12:18 am 
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Joined: Wed Oct 22, 2008 4:00 pm
Posts: 69
Location: Costa Del Morayfirth
Nice work ,how about a list of parts .
At my age its one thing i hate but i do have a hand held low pressure high volume pump which will inflate my 15mtr but i still have to use the pump to give it the correct pressure .


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 12:23 am 
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Joined: Sat Jan 10, 2004 11:53 pm
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I put mine in a cooler for beer cans, so it can sit in a puddle of water on the beach, without damaging the parts. I just used on old Coleman pump, whose battery went bad, and hooked in a battery like yours. It is not a 2 stage pump like yours. Yours is better.


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 4:23 am 
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Joined: Sat Jun 26, 2004 7:41 pm
Posts: 2479
Location: Mtn View, CA (S.F. Bay)
Nicely done! I did the same thing with an extra high pressure stage and low pressure stage I had. Thanks for posting. How did you handle the valve when it switches from low to high pressure?


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 6:32 am 
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@tomatkins
Yeah I plan on sealing the box with resin or varnish to make the whole thing waterproof

@spork
the pressure gauge has a backflow valve on it, i set it up so the high volume stage blows the air through the backflow flap and into the kite, and i connected the high pressure stage in front of the flap so the air only goes to the kite, but the gauge can still read the pressure. i had a couple of bigger and less efficient setups before i finally made this design. I was thinking of rigging my own computer chip to switch pumps when it detected certain pressures but after seeing you over rode the Bravo pump with a toggle switch i just went with the simple rocker switch.


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 9:11 am 
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Joined: Sat Jun 26, 2004 7:41 pm
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Location: Mtn View, CA (S.F. Bay)
Very cool. Do you have a part number and source for the pressure gauge with valve?

I definitely prefer the manual approach (pressure gauge and switch). These pumps are great, but the electronics were not terribly robust. I've converted a whole bunch of them by gutting the electronics and replacing with a simple switch.


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 3:50 pm 
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Really cool. Hope that's not a scratch on that nice table in pic #2. The wife/s.o. may be pissed.


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 6:25 pm 
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spork wrote:
Very cool. Do you have a part number and source for the pressure gauge with valve?

I definitely prefer the manual approach (pressure gauge and switch). These pumps are great, but the electronics were not terribly robust. I've converted a whole bunch of them by gutting the electronics and replacing with a simple switch.


well i just took the pressure gauge off of my naish kite pump. it looks exactly like this:
http://www.murrays.com/mm5/merchant.mvc ... re_Code=MS

I had to do some taping and gluing because the tube diameters are different than the pvc i was using, but i managed to get it airtight.


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Sun Nov 25, 2012 7:05 pm 
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Location: Mtn View, CA (S.F. Bay)
bmkiteboard wrote:
well i just took the pressure gauge off of my naish kite pump. it looks exactly like this:
http://www.murrays.com/mm5/merchant.mvc ... re_Code=MS

I had to do some taping and gluing because the tube diameters are different than the pvc i was using, but i managed to get it airtight.


Perfect! I've been looking for a better solution for my homemade pump. I think that's it.


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 Post subject: Re: Homemade Electric Kite Pump
PostPosted: Mon Nov 26, 2012 12:56 am 
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Joined: Thu Jul 31, 2008 9:55 pm
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Save yourself a lot of hassel and buy a coleman rechargable pump from amazon for less than £30, I got one for my 18M, coz thats a bitch, works a treat. highly recommended

http://www.amazon.co.uk/dp/B001P80GJ6/r ... wo=&hvqmt=


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