At the last battle everyone was asking how my PE could pump so much, so I figure enough people know about it already, might as well talk about it. Plus I did give out a couple, I think you got one right Mike. We tested one the other day at Ricks using the ultra RPM 380 motor I found, and it will also shoot out a 40 ft solid stream. We need to check the gpm on it to see what its doing, my guess would be around 4 gpm with the smaller motor. Lou, it takes me 7 machining steps per unit, so its a long process to make one. As soon as everyone see it working they want one, but I don't feel like staying tied to the lathe for hours at a time making them, then giving them away, but I hate asking for money for them. I made 54 of them, so I still have around 30 or so left.
Sooooo how do you make them? I've seen the really tall streams before but 1gal every 15 sec seams like more then should come out of a pump. I takes almost that long to dump out a gal of water out of a milk jug.
Bob Well actually its like 1 gallon every 13 seconds. We had a 2 gallon container, and was able to empty it in 26 seconds everytime. It's a combination of the pump outlet and the motor. I have a internal 7 deg taper, swampy used a internal 10 deg taper, and the BC has no taper. So as the water moves down the outlet, it has minimal flow disturbance, and comes out as a solid stream, not like the BC, and to lesser extent the swampys. Others that understand hydrodynamics could explain it much better than I just did. Plus I added the barb around the hose end, to help hold the hose on. The motor or the outlet would add about 20 to 25% each to the flow rate, and when I put them together is how I got the highest flow of around 4.5+ gpm. I actually emailed the entire Axis list early last week, offering the outlet and pump info to all the Axis going to MWC Nats, to give us a advantage over the Allies, and I had a total of 1 person respond who was not even going to Nats, he will get one this coming weekend at Southeast regionals. I'm about to go Allied, just because you all at least work together, its just a shame the ships did not look better.
I just wish my woodworking skills were better than they are. I go to Rick, and sit across from Don, and his new Cleveland, and you can see the extra hours he put into just the wood park of the hull, deck, subdeck. I just don't have the patience for it I guess.
Hey Dave, Would you consider a trade? Or good ol cash will work. I am planning on going to Monday and Tuesday at NATS and will probably be taking the Cleveland.
The correct method to measure pumping rate, is to measure the weight of water pumped. Measure the largest amount you can, to reduce the errors in pumping time. Measuring the voulume is not acurate.
So a 2 gallon container, in 26 seconds, timed by a stop watch is not accurate. Its good enough for me. [] I know how much better that it moves water than the other ones. What size for the Cleveland, I think it is a 3 unit, so you need a full unit, 1/8 inch. Ok I will have one for you Sat.
If you were pumping 4+ gal/minute thourgh a 1/8" outlet, you would be drawing ~100 amps at 6 volts. There must be something wrong with your measurement. The volume measurement methold can lead to very large errors. The problem is not with the time, but with the volume. Your "2 gallon" container is not.
If you say so. A 2 gallon container is not. What does that mean. That its not a 2 gallon container, if it only pumps more than 4 gpm, thats still a large improvement over what it out there now. And if we are all off a bit, really what does it matter, since we did a comparison test to the other available outlets, pumps, and motors, and none of them come close, including the Stinger setup in Don's NC, using the Swampy outlet. Lou wants one, if he does not like it, he can just take it out, no gain, no loss. []
Does it still draw around 20 amps like a stinger? I can see the gal bucket is not realy a gallon. I always filled the ice cream buckets up to the top, but that is more then 1 gal. I used a milk jug and marked the line on the bucket. Close enough for me. I've made pump outlets with a tapper going down to the 1/8" hole and a tapper coming out. It cut the pump out time for a gal by 10 sec. I was down to a little over 2 gal a min. I didn't think it could pump out much faster. Wonder what it would pump out at with out the 1/8" fitting. With all that extra water going out does your ship list really hard to the pump side? that was an issue with my Warspite. Chris K you need to use your engineering skills to calculate how many holes is would take to fill a ship at 4 gal a min rate. Very interested to see yours work.
I shoot out the forward casemate, which puts it closer to the centerline, so I don't really see any listing. But going forward, and turning the pump on, I actually see the bow lift a little bit, and the ship acts like it hit a brick wall, the entire thing shutters for a second, and of course slows my forward speed down a bit. But it emptys out the PE so fast, its only on for 2 to 3 seconds at a time. I use a faster motor than the Stinger, it draws about 4 to 5 amps more, but pumps 15 to 20% more than the Stinger, so the combination is what does so well. Well if its not pumping as much as we think it is, no problem for the rest of you is all I can say, right. Only 3 more days till our regionals in Savannah. The PE is ready to go. Here are some pictures of it, Kumano in the background for scale reference. Not that many left really. Single close up.
