LMT-calculator, does it give the right numbers ?

[NIC]

I was playing a bit with it and typed in theese numbers:

17 volt, 130 Amps, 100000 rpm :) !! For a total of 2210 Watts !

And I got the 1920/5 as an answer with 106590 rpms :) !

And then 20V, 115A, 100000: = 2300W and the 1920/6 with 104500 !

Are thoose motors capable of thoose figures, and most of all the total power in Watts ?! I doubt it. Ok, the rpm-limit they say in their homepage are 100000 for the 10,15 and 19 series, so that I will buy but the total power ???

Going along:

24V, 130A, 100000: = 3120W and the 1930/5 (100320 rpms) !

32V, 123A, 100000: = 3936W and the 1940/5 (100320 rpms) !

If they were capable thoose power-figures I woulden´t touch the can afterwards !

Comments please

NIC

[NIC]

It seems like the 10,15, and 19-series has a limit of 100000 rpms according to the calculator. In that case the 1010 series will produce just under 290 W, the 1015 around 360 W and the 1020 440 W !

Examples:

1010 series:

9V, 32A, 100000 rpms = 1010/11 (!) at 288 W and 98182 rpms
14V, 21A, 100000 rpms = 1010/17 at 294 W and 98824 rpms

1015 series:

14V, 26A, 100000 rpms = 1015/11 at 364 W and 101818 rpms
19V, 19A, 100000 rpms = 1015/15 at 361 W and 101333 rpms

1020 series:

18V, 24A, 100000 rpms = 1020/11 at 432 W and 98182 rpms
22V, 20A, 100000 rpms = 1020/13 at 440 W and 101538 rpms

Ok, that was the 10-series. If you look at BK-Electronics homepage they state the power of the 10-series like this:

1010: 200 W
1015: 250 W
1020: 300 W

http://www.bk-electronics.com/modellbau/en/

So the numbers for the 10 series seems about right since the efficiency isn´t part of the calculations.

Moving to the 15-series. Now things are a bit strange. The LMT home page says 100000 for the 10,15 and 19 series ( if my german is correct :) ):

http://web194.srv02.nefserver.info/p00index.htm

So let´s put in some numbers in the calculator:

1515 series:

10V, 94A, 100000 rpms = 1515/6 at 940 W (!) and 95253 rpms
17V, 55A, 100000 rpms = 1515/10 at 935 W (!) and 97158 rpms

We jump to the 1530 series:

21V, 77A, 100000 rpms = 1530/6 at 1617 W (!!!) and 100016 rpms
35V, 46A, 100000 rpms = 1530/10 at 1610 W (!!!) and 100016 rpms

So if the 1530-series has a limit of 100000 rpms is it possible to put 1600 W through them without them blowing up ????? I wonder......

According to BK:s homepage the 15-series has a limit of 65000 rpms and

[NIC]

Sorry, I press the wrong button :D.

65000 rpms and 470W, 570W, 670W and 770W for the 1530 series of motors.

Putting in 65000 for the 15-series in the calculator:

1515 series:

7V, 81A, 65000 rpms = 1515/6 at 567 W and 66677 rpms
11V, 51A 65000 rpms = 1515/10 at 561 W and 62867 rpms

1530 series:

14V, 70A, 65000 rpms = 1530/6 at 980 W and 66677 rpms
22V, 44A, 65000 rpms = 1530/10 at 968 W and 62867 rpms

So here BK:s numbers seems to be more correct.

So I have two things I wonder about. Is the limit for the 15 series really 100000 rpms and if so can they take the power going in to them without beeing destroyed ?

NIC

[Mr. Constructor]

hi NIC

normally the powr band goes down when the rpm rises (normally a problem due to the forces of roulement, the bearings, gravity a.s.o., so the motor might ouch the 100.000 but it will not have any big torque, so these figueres will beonly for sale !! (they couldnot be reached under load or even under normal conditions without having the motor cooled down to -40 ° celsius (with a kryotech possible, THEN it will output the watt, without having any big torque at all, but it will do !!

take the rpm limit down to 60-70.000 then you´re in the top thats reached without useing a kerosine engine (they wil turn almost 160.000 !!!) but take gas like mad !! (every minute half a litre (maybe around 1/5 gallon every minute))