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October 15, 2019, 05:31:27 am

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1
Electric Flight Technical / Re: Brushless Inrunner for Win...
Last post by Nickul - Yesterday at 12:16:52
Dick, that's brilliant thanks, just what I needed. Lehner even have a calculator that I can input the RPM, voltage and current and it recommends a motor.

thanks

Nick
2
Electric Flight Technical / Re: Brushless Inrunner for Win...
Last post by dickw - Yesterday at 11:49:23
Quote from: Nickul on Yesterday at 10:15:12..............................

Hackers motor just about do what I'm after with their, E-50S 2.5D kv1800, but its a little under powered. On their website  they state "I(0)@37V: 4,9A"  what is meant by the I(0)@37V. Is it fair to say if we provide a voltage of 37V its maximum current it can draw is 49amps hence  =1813Watts.

..............................

In Hacker speak the "I(0)" means no load current, so that statement means the motor will draw 4.9 amps if run on 37v with no load. That data can be used in "motor calculators" to help predict performance.

Have you looked at other european manufacturers?
https://www.kontronik.com/en/products/motors/kira/kira-600.html
http://www.lehner-shop.com/en/inrunner/
https://www.leomotion.com/index.php?lang=en
They are all good quality items, and the Leomotion actually uses some Neu parts.

I doubt you will find many UK suppliers, but they are easily bought from european suppliers.

Dick
3
Electric Flight Technical / Brushless Inrunner for Wind Tu...
Last post by Nickul - Yesterday at 10:15:12
Hi could anybody give me some pointers on sourcing a couple of brushless inrunner motors for a wind tunnel model. I need motors capable of 60000RPM and able to handle around 2-3KW.

Neu Motors, neumotors , do what I'm after in spades i.e. their 1518 motor is just what I'm after, but they are not responding to my emails, does anybody know of a UK supplier ?

Hackers motor just about do what I'm after with their, E-50S 2.5D kv1800, but its a little under powered.
On their website  they state "I(0)@37V: 4,9A"  what is meant by the I(0)@37V. Is it fair to say if we provide a voltage of 37V its maximum current it can draw is 49amps hence  =1813Watts.

Any other motors out their in this class? I've done numerous searches but I'm not turning up much.

thanks

Nick
4
Electric Flight Technical / Re: Advice on motors
Last post by paulinfrance - Yesterday at 06:48:25
I bet you wish you spent more attention when in school,, ;) 

http://jivaro-models.org/formules_magiques/page_formules_magiques.html
5
Electric Flight Technical / Re: Advice on motors
Last post by FrankS - October 13, 2019, 23:21:49 pm
if you could advise size and weight of the model, I could run a selection through Ecalc and give a suggestion. Also what is the max diameter prop you'd like to consider. Probably better to match the motor/prop/battery combination to the model than try to replicate an IC engine. With an electric motor you can select one to turn a bigger prop at a lower speed giving more thrust than an IC engine which has to turn the prop at a higher rpm.
6
Electric Flight Technical / Advice on motors
Last post by greyfly - October 13, 2019, 18:18:46 pm
Can anyone recommend a 120 size equivalent electric motor please. I have recently acquired an Ancona c1 scount and want to convert it to electric.
Anyone help.
Cheers in advance
7
RC Model Flying Events / Re: Ashbourne scale day 2019
Last post by ludwig - October 12, 2019, 19:09:20 pm
Lovely day here in Central Cheshire. Been painting my windows all afternoon.
8
RC Model Flying Events / Re: Ashbourne scale day 2019
Last post by Propsize - October 12, 2019, 12:30:51 pm
 Good call Chris, see yers on the 20th.  :af
9
RC Model Flying Events / Re: Ashbourne scale day 2019
Last post by itsme - October 12, 2019, 11:00:58 am
you keep widows out back? Sounds like a good place.. 30 miles away here and the sun is peeping out and its flat calm..
10
RC Model Flying Events / Re: Ashbourne scale day 2019
Last post by CEEJAY - October 12, 2019, 09:45:31 am
Yep I'm sat here now seeing sunshine at front of house listening to rain on widows at back
Planning has shifted gear to next week and weather booked
Hope your all ok with delay but i have been on field in bad weather it ain't fun up there
Chris
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