OK folks, I need pumps for the Viribus Unitis and sisters. I want to get Battler's Connection pumps. I have a few questions. The ships in need of pumps are being built WWCC Big Gun style, which means they are allowed two pumps, with a 1/4" outlet. I'm considering getting either 1 BC Large Pump per ship, or 2 BC small pumps per ship. Either way, I will replace the included restrictors with a straight 1/4" outlet. I do intend to stick with stock motors. So here's my questions. 1) which combination will pump more water, 2 BC small pumps with 1/4" outlets, or 1 BC large pump with 1/4" outlet? 2) of these options, which combination will draw more amps? 3) Which combination would you recommend, considering power, pumping capacity, and cost?
WWCC does not have a gallons per hour limit? Wow ... you can really make a ship unsinkable! Some MWC guys are getting 4 gallons per minute (that's a whopping 240 gallons per hour!) with large BC pumps powered by high rpm motors pumping water through 1/8" restricted opening outlets. I shudder to think what those pump systems could do with a 1/4" outlet. Regarding the question, I would go with a single large pump to reduce complexity (KISS principle). The motor on the stock BC pump can do around 1.5 gallons per minute on an 1/8" outlet. I would guess it could do 2 gallons per minute easily enough on a 1/4" outlet. With today's high capacity nickle metal batteries or even lipoly cells, endurance should not be a problem with a stock set up.
I wonder how big an outlet the BC pump can pump thru before it starts cavitating with the large pump motors people put on these days?
The higher RPM pumps a few of us use now with the BC big units are on the verge of Cavitation and some have priming issues. Any kink in the system will cause it to fail I am afraid with the motor I have been running. I know mine actually had the issue of it now cavitating, but instead it had to send the water some where with a kink in the outlet line, so the water ran up through the pump motor and out the outlet. Not very efficient if you ask me.
Not to pry but what motors are you using?, what voltage and what rpms? I have a line on some high output motors coming soon and I want to stay in the safe zone with them. I will probably try to keep them under those ratings. I also found a little bit larger base helps, Most of the pumps out there have the 1/1/2 to 2" square base. My tests showed my 3 inch round base flowed a bit more. (another area to experiment in)
To answer a question several posts back, a free spinning motor (no water) draws very little (under an Amp easily. However, when it is pumping water 7 amps is not uncommon.
Thanks, Warspite. I just laid out the components in my Viribus Unitis, and discovered that a large pump will not fit. I don't have the length to fit it in the centerline, and the hull is too curvy for me to push it off to one side. It would seem that my decision is already made
Thanks! I tried stingers in the past but was amazed at the amount of power and heat they generated. I decided to go with stock also for those reasons.
The Titan 12 turn sure likes to chew up the energy. So far heat is not a big deal on them. Personally I am looking for other possible motors to try out.
OK I want to test my Stinger to see just how much she is drawing now I can do pretty much anything with Wood but me and electricity don't get along :blush: I do have a fancy dancy Gage thingamajig it is a UEI DM 383 Digital Multimeter and trust me it is more than enough to get me into trouble so set me up bouys how do I fry my ship. wait I already know how to do that and dont aske me how I do either. what I meant was how do I test my draw
Read the manual for your multimeter to make sure you have the leads hooked up correctly and you have the meter set to the right setting so you dont fry it. Make sure your meter is capable of measureing a high current draw without frying. (I've heard stingers can draw 20-25 amps but I've never tested it so I dont know how real that figure it, unloaded mine draw p>
cgi.ebay.com/50A-75MV-AC-DC-Current...ltDomain_0 For large currents, you will not likely find a voltmeter that will read it. You have a couple of options though, such as using a shunt as shown at the link above or a clamp on current meter (available in home improvement stores)
Instruction instructions are you kidding me we don't need no stinking instructions LOL well i would if i had some however it was sold to me from a Friend who was an electrician and closed shop so I figured what the hell ill help him out and have a tool (that I don't have any Clue about)thats out but it is a preety nice one im sure it is this is the meter i have found the destructions on line anyone know chines lol thats what it looks like to me :blink:
This is what I use to measure currents that are out of the range of my multimeter. http://www3.towerhobbies.com/cgi-bi...0&P=ML Has a bunch of other handy features as well.
