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Go with 1 motor a leo 4082 1500kv. Not trying to post my vid on ur thread but check this out. Its running 86 or 87 mph. http://www.youtube.com/watch?v=1AgmXP0QM1o
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What amps would that pull and what batts are we talking about there?HK Genesis, DF Vortex, Baja 5T, Lazer ZX-5 sp, XXX, 8T, P51-D Mustang Shangrila, GP Giant P51-D Mustang, Blade 400 3D, with way too many more to list.
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I will be doing a similar setup on mine, but with better parts. 1300kv outrunners/8s1p/2x120A ICE HV controllersComment
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thats exactly where i took my setup from. Only difference is that I'll be using a prop thats 10 mm smaller, a slightly faster motor and i was gonna go 10s cause i figure Mudl had lower rpm with a big prop whereas I'd have high rpm small prop.HK Genesis, DF Vortex, Baja 5T, Lazer ZX-5 sp, XXX, 8T, P51-D Mustang Shangrila, GP Giant P51-D Mustang, Blade 400 3D, with way too many more to list.Comment
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The x430 prop is a 30mm prop with 1.4 pitch. That would be 20mm smaller, and would just net you a whole lot of cavitation. Im guessing that KB motor at that RPM is going to draw a ton of current regardless of what prop you put on it. To go the speeds you want to go, you are going to need to draw a few hundred amps. There are plenty of people on here that will tell you how fast they have gone but they cant tell you what their current draw is unless they have logged it. You surely wont do it at 80A in a single setup. Mudl was probably pulling a lot more than 80A out of his ESCs but pushed the limits to see what they could do. For every one person who has ran xxx setup adn went xxmph, there a bunch more who fried their stuff with a milder setup. A lot of it is just luck of the draw and the matter in which you run your boat.
You won't get more RPM out of outrunners. I think he had to be right at the top of the RPM range for outrunners there. The design of ourunners makes them terribly inefficient at higher RPMs, and teh ESC simply cant keep up. Running an 8 pole motor at 40,000RPMs is equivelant to running a 4 pole inrunner at 80,000RPMs. If you want to go fast with hobbyking parts, I would suggest copying his setup but run smaller props, like x442's to keep all the magic smoke in your electronics.Comment
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how do I know how many poles a motor has?HK Genesis, DF Vortex, Baja 5T, Lazer ZX-5 sp, XXX, 8T, P51-D Mustang Shangrila, GP Giant P51-D Mustang, Blade 400 3D, with way too many more to list.Comment
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Its hard to tell when you get them from places like HK. If you use higher quality motors they usually list it in their specs. I think the KB motor you linked is a 2 pole and the outrunners in that vid are 8 pole.
FYI- the cheaper motors like HK or even Feigaos dont do well with high RPM in my experience.Comment
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I'm waiting to see a lot of guys copy mudl and never see 87, maybe if they are lucky 77. lolComment
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The experienced ones are far from trying to say you should be driving a tyco or not up to par for the boards. We all started not knowing much if anything at all. Were just trying to help you to understand what can and cant be done. Too many people have done hot set ups, blown up thier stuff, lost most of thier "low budget" because it all burnt and then theyre gone forever and we never hear from them again. OR, they start saying how crappy this or that component is when in actuallity they are very well built and if taken care of and set up w/ in thier means will last a very long time. Thats all were trying to do for you, but you seem to want to take it as we are dissing on you and crapping on your project. Your asking for gold wanting to pay for plastic. But, if you cant take advice, then oh well. Why did you ask if you know it all. Some of us who have done what your trying to do and been in your shoes who know what can and cant happen, I guess we are just retards and our experience doesnnt mean tihs to you. Know ones ever pissed me off until you. Thanks,. Im done trying to give advice and help w/ your thread. Good luck.Last edited by tiqueman; 04-10-2011, 10:09 PM.Comment
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Castle 1717 on 8s and a http://www.hobbyking.com/hobbyking/s...dProduct=12442 . A little under $300 for esc and motor and you would hit 80 with the right prop.Fleet: 55" Quad inline T600 Cigarette boat, Twin Mean Machine, Twin T600 47" mystery mono, 4082 Surge Crusher, 1717 8s Genesis, 4074 Villain, "mini mono", 52" Bonzi, Prather Funcruiser, 2 DPI 3.5cc tunnels, 5' Styrofoam recover bargeComment
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I will explain this, and you can choose to beleive me or not.
That motor will probably work on 36v, just not in your boat. Make sense?
The problem is the load. The faster you try to spin a prop, the more the load increases. Thats what tiq was getting at with giving you the info on his setups. I ran a 1600kv motor on 6s with a 45mm prop and it pulled about 170A. Obviously a 80A Esc wouldn't last under that load, and if you were to spin that motor on 8s you would probably be talking close to 250A-300A.
That motor is rated at 36v you say...what is the current rating? As long as you stay within the current ratings of the motor and ESC, it will indeed run on 36v. The problem is, you wont.Comment
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The single setup will be cheaper and most definately easier setup. I never saw your c rating on your batteries but if its high enough u can get by with a 1 p setup. So as far as batteies you may already have that covered
As far as motors since none of the manufacturers sponser me I cant really call one over another but the leopard in howards boat does seem to be doing quite well in a hull of similar style and weight as yours. Youll have to ask howard the number of cells he thinks you can stfely set up the boat for heat racing. Im assuming thats what you want or do you want all out burst of speed?Anyway I agree that a single will be cheaper. Youll have to get a good hv like turnigy aquastar 240 on hk. If thats too much to ask for at this moment and you need to use what you already have. You may consider a gearbox for one of your XL motors
or you can go with your twin xl'sComment
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I see your 8xls arent matching that COULD be a problem I dont know but out of what you have if it were me id sell some of what you have or trade to get what you need if you could trade a motor to get a match then u might be headed in the right direction if u dont want to spend more money at this time get a match for the fiegao 6 or the 8 the 8 preferebly coz u can turn a bigger prop and safely run more cells but the 6 will be okay if that what you find. What you need is someoone to trade you an 8xl for the 6 or vice versa. Or sell out coz alot of what you have will sell in the swap shop.If you batteries are new id keep them then you could get your esc and leopard if thts the route you decide to take two 8xls on 5 s a piece with some 645 or 445 might get you going good as well. See you already have the batts all u need is one motor the 8xl u could technically try the mismatches if the kv is the same and see
but it will likely pull to one side a little .But at least youd be mocked up and ready for the matching feigao .
My best advice is to look learn and listen and decide what works for you .You cant knock it till you try it. My advice is strickly in the persuit of giving you a fun boat for the dollars. Let me add this: 70 plus mph is approaching upper performance and will cost something u know it$ so naturally you may have to manuever some things in the swap shop to get what you want. Also maybe you should pm steve and tell him your situation privately and keep your business between you and Steve and get your leopard if thats what you want.Comment
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