Results 1 to 12 of 12

Thread: Motor comparison/ reccomendation for sport hydro

  1. #1
    Join Date
    Apr 2007
    Location
    ON
    Posts
    9,384

    Default Motor comparison/ reccomendation for sport hydro

    I was going to goof around with a 26" ML Boatworks hydroplane I built a few winters ago this season and I wanted to try a 2S setup. I know, why 2S? Well because it's a small hull and it doesn't need to be over powered.

    I was looking around at motors on Ebay and found numerous 4 pole motors in the range of 36mm x 50mm L up to 65mm L.

    You can see where I'm going here, cheap, lol... They range in price from $25US up to $40 or so and I would hazzrd to guess most are all the same inside.

    ONe 3500KV choice example: https://www.ebay.com/itm/Surpass-KK-...r=692016908939

    and then I saw a seller with cheap Castle clones a 1406 motor of 4600Kv.

    The Castles are rated for up to 4S where the Surpass is not rated that high or lets say I don't really trust their specs, lol...

    Would the Castle with better quality (provided it's up to Castle specs) be just as able as the Surpass?

    Odd question but I know Don and other guys would be able to give me an Idea of what is best.

    I'm just a tad bit nostalgic at the moment and miss those Fiegao days for some reason???

    I could put a Dynamite 2000kv in there but the large prop it can turn might make it hard to manage.

    It would be nice to see how fast a 2S setup can be with an inexpensive motor.
    Nortavlag Bulc

  2. #2
    Join Date
    Dec 2014
    Location
    Ga
    Posts
    541

    Default

    "Best" ?? you know that the best, is always relative!

    A 1406 motor ( can diameter X rotor length) "should" have 15.25mm long guts in it. That's what the 06 stand for in inches. That's a tiny motor.


    The few 3650 motors (36mm X 60mm CAN size) that I've had apart, had 20 to 25mm long guts. 3660 and 65 motors can be anywhere from 30 to40mm depending on if and how much, the mfg. wants to fool you! Most all of the cheaper motors I have had apart tend to be 30mm, and then if you pay more, you get more!

    Send me or Terry that 2000 dyna, and get it wound to 3000 - 4000 kv. then you'll have a decent motor! But then you have an 80 dollar motor, with a 50 dollar rewind in it. Fast aint cheep!

    BTW when talking about motor size designations, they can be very confusing because there is no standard for all the different brands to go by.

    I describer the two above, and then there are others who do it differently.

    TP does like NEU except they do it in mm. 4070 =can diameter is 40mm and rotor length is 70 When I say rotor length, I mean that the rotor AND stator are the same length. One aint no good without the other.

    lehner sez it like 1530 with 15 being the rotor diameter in mm, and 30 the rotor length in mm.

  3. #3
    Join Date
    Oct 2009
    Location
    MI
    Posts
    6,183

    Default

    I never thought of that Don. A 3000kv 6 pole on 2s. Why not. Would probably turn a gob of prop.
    Noisy person

  4. #4
    Join Date
    Apr 2007
    Location
    ON
    Posts
    9,384

    Default

    Quote Originally Posted by donhuff View Post
    "Best" ?? you know that the best, is always relative!

    A 1406 motor ( can diameter X rotor length) "should" have 15.25mm long guts in it. That's what the 06 stand for in inches. That's a tiny motor.


    The few 3650 motors (36mm X 60mm CAN size) that I've had apart, had 20 to 25mm long guts. 3660 and 65 motors can be anywhere from 30 to40mm depending on if and how much, the mfg. wants to fool you! Most all of the cheaper motors I have had apart tend to be 30mm, and then if you pay more, you get more!

    Send me or Terry that 2000 dyna, and get it wound to 3000 - 4000 kv. then you'll have a decent motor! But then you have an 80 dollar motor, with a 50 dollar rewind in it. Fast aint cheep!

    BTW when talking about motor size designations, they can be very confusing because there is no standard for all the different brands to go by.

    I describer the two above, and then there are others who do it differently.

    TP does like NEU except they do it in mm. 4070 =can diameter is 40mm and rotor length is 70 When I say rotor length, I mean that the rotor AND stator are the same length. One aint no good without the other.

    lehner sez it like 1530 with 15 being the rotor diameter in mm, and 30 the rotor length in mm.
    Sounds like a solid plan Don. $50 isn't a bad price to pay for a much more solid motor. I will keep you guys posted on that.

    Thank you! I will stay away from the cheapie motors for now. A .6" rotor, yikes!! lol...
    Nortavlag Bulc

  5. #5
    Join Date
    Apr 2007
    Location
    ON
    Posts
    9,384

    Default

    I have a spare pair of 1500's, the nice ones. What are winding choices for that base motor?
    Nortavlag Bulc

  6. #6
    Join Date
    Dec 2014
    Location
    Ga
    Posts
    541

    Default

    You can go back with the standard 1500, or I do a 3 delta like the 2000s have and that get you 1900 to 1950 kv

    Unless your thinking of making it for the 2s. Then you could do a 2D and that would up the kv around 35% to 2600 or a little more. Still not enough for a 2s I don't think. Beyond that, you would have to go to a DDD to get it any higher, 4 or 5 DDD should put you over 3000kv.

  7. #7
    Join Date
    Apr 2007
    Location
    ON
    Posts
    9,384

    Default

    I see. I'll think about that for a bit. Thank you.
    Nortavlag Bulc

  8. #8
    Join Date
    Mar 2017
    Location
    VI
    Posts
    371

    Default

    Leopard 3674 2d. The 3300kv version. The guts in that can is 46mm. You can probably use an octura x640 or x642 on 2s.

  9. #9
    Join Date
    Jun 2011
    Location
    FL
    Posts
    789

    Default

    After setting up for a 2S record a couple years ago I was surprised how many amps a small 40mm motor pulled. 250-275 amps. Anyway why not reduce amps and run 3S. Not over powered and use a 28-29mm 3000-4200kv that costs $45. We tried to get an "O" hydro class going (failed) but a 24" (12JAE) ran 50mph on 3 cells with 37-40mm props. Absolute cheap thrills and decent run times with 2500-4000ma.
    Mic

    Mic Halbrehder
    IMPBA 8656
    NAMBA 1414

  10. #10
    Join Date
    Mar 2017
    Location
    VI
    Posts
    371

    Default

    Leopard 3674 2d 3300kv should pull 150 amps peak and fall off to 115 or 120 amps on 2s with a x642.

    Speed should be around 33mph on 2s.

  11. #11
    Join Date
    Mar 2017
    Location
    VI
    Posts
    371

    Default

    I agree 3s is fast. I have had boats the revolt 30 and pursuit that could beat any ready 6s boat only 3s.

    I am refering to the 6s single motor factory setup boats with the stock prop that they come with.

    It have some who I run boats with had a pursuit do 75mph on gps with only 4s in salt water.

  12. #12
    Join Date
    Apr 2007
    Location
    ON
    Posts
    9,384

    Default

    Thanks guys. Lots of interesting suggestions. I was looking at a Scorpion 28mm motor and for $100USD it seems like quite a nice motor. KV ranges are good for N2 boats.

    No rush, thank you.
    Nortavlag Bulc

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •