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Thread: F.s. (2) lehner lmt 3080lk 5 wind

  1. #1
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    Default F.s. (2) lehner lmt 3080lk 5 wind

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    Last edited by jj2003; 01-14-2018 at 10:11 PM.
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    At 1050 kv , can be used at 10s for the most ?

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    Quote Originally Posted by Leeandre View Post
    At 1050 kv , can be used at 10s for the most ?
    That would be correct if wired in Delta, in Star it could be up to 14s
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    If I wanted to run it in a mono between 10s and 12s with prop changes between like an 0ctura x455 and a x460 will this motor work. A bit of a novice as you can tell . Oh it's a single

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    I would say in a larger mono, bigger than 40" a 455 or 460 would be a good choice. I had a 45" Hydro with both of those props and a 780kv motor on 10s. Anything smaller in hull size is overkill I think. I cant remember the formula to figure out the kv in WYE(STAR) vs Delta. I have it here somewhere. If I find it, I'll post it, or maybe someone can chime in. In any case, when changing from Delta to WYE(STAR) the KV drops to allow for more voltage.
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  6. #6
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    Hey

    In Star-config it will run about 600 Kv, do not run this motor in Delta config on 10s in a mono except for SAW.
    It will burn Your esc.
    But in Star with 10-12s2p and a 470 Octura you could move everything

    Regards Brian

  7. #7
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    Quote Originally Posted by Leeandre View Post
    If I wanted to run it in a mono between 10s and 12s with prop changes between like an 0ctura x455 and a x460 will this motor work. A bit of a novice as you can tell . Oh it's a single
    I think this is the formula

    Please someone correct me if this is wrong.

    Delta KV divided by 1.73.

    So 1050kv / 1.73 = 606.94....

    14s = 3.7 x 14 =51.8v...

    So 51.8v x 607kv= 31,643 rpm

    or

    10s = 37v

    37v x 1050kv = 38,850 rpm

    OR

    depending on how you represent battery voltage

    @ 3.7v or 4.2v
    (discharged vs fully charged battery)

    14S = 4.2v X 14 = 58.8v

    58.8v X 607kv = 35,691 rpm

    or

    10s = 42v

    42v x 1050kv = 44,100 rpm

    You need a VERY good speed controller.
    Last edited by jj2003; 01-08-2017 at 01:01 PM.
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  8. #8
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    Cool

    Don't use 4.2 volts for this type of calculation, the motor never sees this voltage under load. 3.7 is a better average loaded voltage although a bit low. Kv x volts does not provide loaded rpm, this is heavily influenced by motor and ESC efficiency, and pack quality. IME a better formula for estimating loaded rpm with loads around 150 amps is:
    Kv x 3.7 x 0.85 = loaded rpm
    Again just an estimate, but more useful than Kv x volts

    To leandre - if you want to run 10S to 12S the Delta wind is not the way to go. Wye wind Kv is about 600, so on 12S expect a loaded rpm around 23,000. An x460/2 should work well, as would an x455/3 on a correctly trimmed mono from 40-45" long.


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    Last edited by Fluid; 01-08-2017 at 03:04 PM.
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  9. #9
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    Cool

    You do not run this motor in a 40-45 mono. Its to heavy...
    Sorry, but you are very wrong. I speak from experience, the 3080 motor is perfect for large gas monos. At least three club members have run 3080s in their 42-45" racing monos and they were ballistic, topping out between 60-75 mph depending on the prop used. In races they ran away and hid from 'most all gas powered monos. They work great in single cats and sport hydros of the same size too. You just need to choose the right Kv.


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    Keep in mind too that Lehner's are rated "under load" for Kv bringing final rpm up noticeably.

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    Oh and I know a guy who runs a single 3080/9 (583Kv) in a 67" mono turning an X470 on 12S2P...just to give an idea of what these motors are capable of.
    mono_lmt_3080_113.jpgmono_lmt_3080_105.jpg

  12. #12
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    Keep in mind too that Lehner's are rated "under load" for Kv bringing final rpm up noticeably.
    Good point, thanks. My formula was for every other motor - use a correction actor of 0.93 for Lehners.


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    Quote Originally Posted by Fluid View Post
    Good point, thanks. My formula was for every other motor - use a correction actor of 0.93 for Lehners.


    .
    Hey I'll take a thanks from you any day Fluid! ;-)

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    Wowwww..

    i interrest.

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    So. i need one not dual.

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    shame they are 10mm shaft,

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    Quote Originally Posted by robw View Post
    shame they are 10mm shaft,
    Jeff Wohlt makes a "Big Dog" collet for 10mm shaft, .250 flex. I just sold 2 sets of MBP collets the same config.
    "If guns cause crime, all of mine are defective"
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    sorry, I meant, shame they are 10mm shafts, I need 8 mm shaft for a truck,

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    Quote Originally Posted by robw View Post
    sorry, I meant, shame they are 10mm shafts, I need 8 mm shaft for a truck,
    No offense my friend, Just an FYI,
    "If guns cause crime, all of mine are defective"
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  21. #21
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    I could use your advice on these and if it would be appropriate for the application I'm thinking of. I may be crazy for speed! I'm considering Storm Cat or a Cat in the 48"-50 plus inches. Would both of these be an overkill installed in a Large Cat?

    To the monitor, I apologize if I am asking question in the wrong forum.

  22. #22
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    Not At all. I ran that motor in an R42 75plus easy. Not as a dual but single.


    Sent from my iPhone using Tapatalk

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    Quote Originally Posted by 427Z View Post
    I could use your advice on these and if it would be appropriate for the application I'm thinking of. I may be crazy for speed! I'm considering Storm Cat or a Cat in the 48"-50 plus inches. Would both of these be an overkill installed in a Large Cat?

    To the monitor, I apologize if I am asking question in the wrong forum.
    Well, my honest opinion would be anything under 60" would be overkill unless you are running SAW. Even then, its gonna be heavy, BUT the power to weight ratio would be incredible!
    "If guns cause crime, all of mine are defective"
    45"Speedfreek
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    Memorial weekend viewing

    "All gave some, some gave all"

    God bless America and god bless those that laid down their all for our freedom.

    NEVER FORGET
    "If guns cause crime, all of mine are defective"
    45"Speedfreek
    , Fightercat #068 ​, MyYoutube Vids

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    Fathers day weekend viewing. Just in case someone wants to buy themselves a gift, or point someone in the right direction.
    "If guns cause crime, all of mine are defective"
    45"Speedfreek
    , Fightercat #068 ​, MyYoutube Vids

  26. #26
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    Bit of a tip here, reduce the 10mm shafts to 8mm, then try car forums, i'm already running a 8mm 3080 in a 1/6th car so no advantage to me, good luck

  27. #27
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    free bump for holy mother of motors!!!! I could put these is a darn golf cart!!!!!

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