Water pickup drag testing

[runzwithsizorz]

pump.jpg

Pump Specifications:
Free Flow Range: 850 - 2660 cc/min
Vacuum Range: 0 - 12.6 "Hg
Pressure Range: 0 - 7.7 psig
Standard Motor Voltage Options: 4.5, 6, 9, or 12 VDC
Motor Construction Options:
Ironless Core - Sleeve Bearing (single bearing also available)
Iron Core - Sleeve Bearing
Brushless - Ball Bearing
Diaphragm Material Options: Neoprene (EPDM & Viton also available)
Operating Temperature Range: 32??-122??F (0??-50??C)
Weight: 1.2 oz (35 grams)
Size: 1.4 cubic inches
There are receivers, and servos that can handle up to 9 volts, so a small 2s receiver pack should be able to move about 30+oz. a minute. (enough?)
One time I brought a boat back in, and it was so scary hot, I gave it mouth to mouth blowing threw the inlet tube from a bottle of ice cold water, LOL.

[kfxguy]

[ATTACH=CONFIG]143724[/ATTACH]

Pump Specifications:
Free Flow Range: 850 - 2660 cc/min
Vacuum Range: 0 - 12.6 "Hg
Pressure Range: 0 - 7.7 psig
Standard Motor Voltage Options: 4.5, 6, 9, or 12 VDC
Motor Construction Options:
Ironless Core - Sleeve Bearing (single bearing also available)
Iron Core - Sleeve Bearing
Brushless - Ball Bearing
Diaphragm Material Options: Neoprene (EPDM & Viton also available)
Operating Temperature Range: 32??-122??F (0??-50??C)
Weight: 1.2 oz (35 grams)
Size: 1.4 cubic inches
There are receivers, and servos that can handle up to 9 volts, so a small 2s receiver pack should be able to move about 30+oz. a minute. (enough?)
One time I brought a boat back in, and it was so scary hot, I gave it mouth to mouth blowing threw the inlet tube from a bottle of ice cold water, LOL.

Where do I find one of these pumps?


Sorry guys that this test was delayed. I was supposed to rain all day so I took the zelos apart yesterday to paint it. Well it rained just a little bit and I was actually able to get to the lake and run my Rivercat for two different sessions but getting them on video. My temps were actually low except when I tried to run a prop with more pitch....the motor and esc didn't like it. The esc what actually cutting out. Swapped my original prop back on and no cutting out. I guess that castle mamba xl2 has a current limiting feature that actually works. I think it's set at 260a. So for getting off subject here. I'm probably still going to either put a pump in it or do a knife blade with the inlet and outlet in the bottom of the hull.

[dmitry100]

Any way of actually removing that limiting feature? Do they have that option in their firmware at all? There is an option to increase the temp cut off though right... maybe that could be cutting it off as well?

[dmitry100]

kfxguy: https://www.google.com/search?q=Micr...Micro+Air+Pump

http://www.bgmicro.com/search.aspx?find=pump

http://www.skycraftsurplus.com/3a120insnf20vc2airpump.aspx

http://www.ebay.com/itm/Mini-Air-Pump-680-cc-min-6-to-12-V-DC-4-2-PSI-Sensidyne-w-Mabuchi-Motor-/271872015432?hash=item3f4cd5bc48:g:YqsAAOSwBahVVzg2

Thats what was mentioned in his rcgroup thread.

[kfxguy]

kfxguy: https://www.google.com/search?q=Micr...Micro+Air+Pump

http://www.bgmicro.com/search.aspx?find=pump

http://www.skycraftsurplus.com/3a120insnf20vc2airpump.aspx

http://www.ebay.com/itm/Mini-Air-Pump-680-cc-min-6-to-12-V-DC-4-2-PSI-Sensidyne-w-Mabuchi-Motor-/271872015432?hash=item3f4cd5bc48:g:YqsAAOSwBahVVzg2

Thats what was mentioned in his rcgroup thread.

I bought the one from the eBay link. If it allows flow through with it off that will be perfect.

I think I can turn off the limiter but I'd rather keep it on so I don't smoke it. I may put a sf300 in it to put more power down.

[dmitry100]

Well, can't you just add more water cooling to the ESC to cool it down more ?

[NativePaul]

You can't disable the current limiting on the XL2 like you can on the ice 200 air ESCs, best you can do is turn the limiting up to 300A.

[kfxguy]

You can't disable the current limiting on the XL2 like you can on the ice 200 air ESCs, best you can do is turn the limiting up to 300A.

I'm not too worried about it. I have a sf300 brand new in the box for my mono that I'm building so I might try it. I'd rather not push this castle esc to its limits anyway. I know on my regular prop is fine so it's not necessary but I'm thinking the sf300 might put down more top end power. Only thing I can do is try. I can't wait to get my micro pump in. That will help with heat soak.

[runzwithsizorz]

I bought the one from the eBay link. If it allows flow through with it off that will be perfect.

I think I can turn off the limiter but I'd rather keep it on so I don't smoke it. I may put a sf300 in it to put more power down.

Sense it is a diaphragm type pump it should. Some questions I, and you should consider; how will you power it? the rated max 680cc output, is that reliant on the delivery of a full 12volts?
will this be for the ESC only? or for the motor as well? how are the temps on your motor thus far? Perhaps your motor could live without the pump, which would be a plus! (you would however need 2 water pick-ups).
Can your receiver, and servo handle 8, or 9 volts? 680cc is a little less than 3 cups a minute, will that really be enough? At 7.5volts it could be a lot less. The PSI could also drop, and tube, and plate resistance could also be a factor. By my calculations the pump I linked would deliver aprox. 4 cups @ aprox. 4+ psi, *AT* 7.5 volts. What got me interested in pumps was that I had built a showboat with a lot of lights that could just sit there on the lake and put on a show for at least 30 minutes. Motor run time was around 10 minutes, (18,000mah). But she is heavy, and an amp hog, so after 2 minutes of 50mph figure 8's the temps were pretty high. This boat has telemetry++++! Rather than just bring her in with 8000+ mah still on the mains, I would just let her sit out on the water putting on her light show, (oh's, and ah's from the crowd, but eventually they want to see her go). The trouble is, the temps would not really drop low enough for me to take another few laps within 2, or 3 minutes. That's where the pump came in. BTW, the boat has 7 channels.
I wish you well in your endeavors, you could be breaking new ground in saw *longevity*.

[runzwithsizorz]

Double post, could someone please feed the meter.

[kfxguy]

Sense it is a diaphragm type pump it should. Some questions I, and you should consider; how will you power it? the rated max 680cc output, is that reliant on the delivery of a full 12volts?
will this be for the ESC only? or for the motor as well? how are the temps on your motor thus far? Perhaps your motor could live without the pump, which would be a plus! (you would however need 2 water pick-ups).
Can your receiver, and servo handle 8, or 9 volts? 680cc is a little less than 3 cups a minute, will that really be enough? At 7.5volts it could be a lot less. The PSI could also drop, and tube, and plate resistance could also be a factor. By my calculations the pump I linked would deliver aprox. 4 cups @ aprox. 4+ psi, *AT* 7.5 volts. What got me interested in pumps was that I had built a showboat with a lot of lights that could just sit there on the lake and put on a show for at least 30 minutes. Motor run time was around 10 minutes, (18,000mah). But she is heavy, and an amp hog, so after 2 minutes of 50mph figure 8's the temps were pretty high. This boat has telemetry++++! Rather than just bring her in with 8000+ mah still on the mains, I would just let her sit out on the water putting on her light show, (oh's, and ah's from the crowd, but eventually they want to see her go). The trouble is, the temps would not really drop low enough for me to take another few laps within 2, or 3 minutes. That's where the pump came in. BTW, the boat has 7 channels.
I wish you well in your endeavors, you could be breaking new ground in saw *longevity*.

My plans were to first check out the flow first. I have three different pumps ordered. Next was to measure amperage with my multi meter. Than to power it, first thought was to use a bec off the main power but I don't want to take away from speed giving power to run it. So if it uses too much power then I'll add a small additional battery to it. I'll use a pico switch to turn it on with the third channel.

[kfxguy]

Also if it's a diaphragm pump then water should pass through with my pickup but I really want it for the cool down factor at the end of my first run when it's sitting and I'm waiting for the wake I just made to go away.

[Mxkid261]

Got a quick question, I put in sponson pickups on my rivercat when I fixed it the other week, how should I close off the pickup in the rudder? Just a dab of clear silicone?

[kfxguy]

Got a quick question, I put in sponson pickups on my rivercat when I fixed it the other week, how should I close off the pickup in the rudder? Just a dab of clear silicone?

Jb weld. Let dry. Sand flush

[Mxkid261]

Jb weld. Let dry. Sand flush

Perfect thanks