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  1. The Kv is too high, amp draw will be high and the...

    The Kv is too high, amp draw will be high and the small prop needed will not be efficient. The Kv needs to be around 1500-1700.



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  2. Either should work well, I ran the ProBoat 1500...

    Either should work well, I ran the ProBoat 1500 on 4S in a 34" catamaran and got mid-60s (km/h). Setting up a hydro can be a bit of a challenge (CG, strut depth) but that motor on 4S with a good...
  3. Lots of folks run the motors I listed or...

    Lots of folks run the motors I listed or equivalents with wonderful results in 1/10 scale hydros. The ESC should be 120 amps minimum. Boats pull a LOT more amps than planes and even most 3D Helis. ...
  4. Very poor advice! That motor has far too high of...

    Very poor advice! That motor has far too high of a Kv for a 37.5" boat on 4S, it will not be efficient and will overheat quickly. A 37mm prop is too small for that size boat too, and it will not go...
  5. What size motor? What size boat? What prop? ...

    What size motor? What size boat? What prop? Which ESC? .
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    That is a pretty high Kv for a boat that size,...

    That is a pretty high Kv for a boat that size, it's twice the size of you smaller hull. What prop are you using? I suspect that you just don't have enough thrust for that large hull.


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  7. In order to help you we will need more...

    In order to help you we will need more information. Have you built and run an FE in the past? What is the size of the boat? Where will you run it? What are your performance expectations - speed,...
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    I'm sure you think the boat is 'extremely fast',...

    I'm sure you think the boat is 'extremely fast', but I know what I'm talking about. I hold - and have held - numerous speed records with FE hydros, and the way you have that one configured it will...
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    It is certainly not running anywhere near 150...

    It is certainly not running anywhere near 150 km/h but I am certain it is still a lot of fun. We would love to see photos of it.

    The heat is because you are over-powering the electronics. The...
  10. This really doesn't make sense - unless there is...

    This really doesn't make sense - unless there is a direct short the packs can't get hot enough to explode in 3 seconds of running. The OP needs to tell us more: exact boat and size, the ESC, the...
  11. Hard case is usually not the best way to go for...

    Hard case is usually not the best way to go for boats. Most all experienced boaters use soft case packs.


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  12. Thanks for the input1 Qwk, data is always good to...

    Thanks for the input1 Qwk, data is always good to have. The OP will need more motor and power to achieve comparable speeds - depending on what he wants for speed. And 4S will not be enough either,...
  13. Yes it is. Here is the thread which explains...

    Yes it is. Here is the thread which explains what I did.


    http://www.rcuniverse.com/forum/rc-scale-boating-103/11394863-kreigsmarine-explosive-r-c-boat.html


    Most modern brushless ESCs work...
  14. That is 'way too much prop for that motor, you...

    That is 'way too much prop for that motor, you will burn up the ESC and then the motor. The prop size is a bit big for the boat although it may work with the right motor. I suggest an outrunner...
  15. What kind/size of boat, what prop and how many...

    What kind/size of boat, what prop and how many cells will you use? That is a pretty high Kv motor for a direct drive propeller, it is designed for a gear drive. To keep it from burning up you may...
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    That hull shape is highly susceptible to torque...

    That hull shape is highly susceptible to torque roll, which is what you have. As above, change one motor to right handed rotation; you will need a right handed prop the same size as the other one.
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  17. Thread: prop selection

    by Got RPM
    Replies
    1
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    423

    My MC hit 45 mph with an m445 2-bladed prop, you...

    My MC hit 45 mph with an m445 2-bladed prop, you don't need - nor especially want - a 3-bladed one with the stock motor. Amp draw is higher versus the stock prop, but so is the speed. ...
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    It isn't if you know where to look. All those...

    It isn't if you know where to look. All those below are excellent hulls depending on what you want to do with them. They are well worth the money if you want the best, fastest and best...
  19. Thread: Motor info

    by Got RPM
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    2
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    236

    No photo showing..... .

    No photo showing.....


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  20. Replies
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    Here is video of the record passes. Video...

    Here is video of the record passes. Video quality suffered in the dark, but you get the idea.


    http://www.youtube.com/embed/l1uG4He8Ogg?wmode=opaque
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    Twenty minutes after sunset is pretty dark for...

    Twenty minutes after sunset is pretty dark for decent video. There were a few with cell phones but so far I have not seen any posted.



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  22. Replies
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    New Worlds Fastest R/C Boat

    Last night after sunset a new speed record was set at Legg Lake in LA. Tyler Garrard broke the old record of 140 mph set in 2006 - his boat averaged 143.94 mph. It was a wood/composite outrigger...
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    No way with the x442. Maybe with the 4519. I...

    No way with the x442. Maybe with the 4519. I assume a twin with 6S2P?



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  24. Replies
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    No plan, but I built several 25 years ago and...

    No plan, but I built several 25 years ago and they rocked. I used mylar for the sail and airplane wheels on a canard-style design, and the land yacht was very responsive. Even in light winds it...
  25. Thread: ESC troubles

    by Got RPM
    Replies
    8
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    218

    This is a popular controller and a lot is known...

    This is a popular controller and a lot is known about it - I had one myself. It will start up with a low voltage, but then quickly shut off. You need to run a minimum of 4S.


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