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Author Topic: Quick question...  (Read 1320 times)

U-33

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Quick question...
« on: September 03, 2014, 01:16:43 PM »

Will an Mtroniks Micro Viper 10amp esc be man enough to run a 380 motor on 7.2volts, chaps?


Rich
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Rich

K-157 Vepr. Akula-II (project 971U)
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jarvo

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Re: Quick question...
« Reply #1 on: September 03, 2014, 02:40:34 PM »

Hi Rich


You need to run the motor with an ammeter to find what power in is pulling, like 540's there are so many available with different windings, some are 4.5 - 6 volt some are good to 12 volt, i have seen some rated to 24 volt.


Test first not with your precious ESC plugged in


Regards


Mark
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Tugs are for pulling

Tug-Kenny

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Re: Quick question...
« Reply #2 on: September 03, 2014, 02:45:26 PM »


A fuse in line might be a good idea.


ken

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U-33

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Re: Quick question...
« Reply #3 on: September 03, 2014, 03:03:43 PM »

Tested...failed. Miserably...

I tried it (without the esc) on an 11.1v LiPo...shouldn't have done that. The motor was mounted in one of MMB's SubSonic mounts, glued into the wtc end cap. I touched the battery leads to the motor...the prop shot off the shaft, the shaft came out of the motor mount and is currently under the bed somewhere where it finished up, the resin motor mount disintegrated into a million pieces and the motor, now not being fixed to anything, went off along my bench at supersonic speeds, only stopping when the leads to the battery parted company with it.


The whole sorry episode took less than two seconds, but I've never seen so much destruction take place in so short a time...

Oh well...back to the drawing board, as we idiots say. Regularly...

Rich
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Rich

K-157 Vepr. Akula-II (project 971U)
---------------------------------------------------------------

~~~~~~~  "Motorflotes need love too...."  ~~~~~~~

MotorFlote build log : http://www.modelboatmayhem.co.uk/forum/index.php/topic,15222.0.html

jarvo

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Re: Quick question...
« Reply #4 on: September 03, 2014, 04:53:18 PM »

Rich


I have stopped laughing now (my ribs hurt) the look on your face must have been a picture, the language just as good!!!!


The kick as the prop and shaft parted company had to have been humungus.


After all this, did you get the readings on the motor???


Mark
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Tug-Kenny

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Re: Quick question...
« Reply #5 on: September 03, 2014, 05:00:43 PM »



Looks like a quick answer as well.         %)


                  Problem solved


ken
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U-33

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Re: Quick question...
« Reply #6 on: September 03, 2014, 05:09:52 PM »

I didn't have time to look at the meter...took me a while to find the leads for that too.  I've never seen anything move so perishin' quick...one second it was there on the bench, a millisecond later and the work bench looked like an Iraqui war zone.

But, you know me...''oh gosh and bother it'' I said, ''that was a silly thing to do'' I said. And if you believe that...you'll believe anything!

Rich
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Rich

K-157 Vepr. Akula-II (project 971U)
---------------------------------------------------------------

~~~~~~~  "Motorflotes need love too...."  ~~~~~~~

MotorFlote build log : http://www.modelboatmayhem.co.uk/forum/index.php/topic,15222.0.html

unbuiltnautilus

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Re: Quick question...
« Reply #7 on: September 03, 2014, 05:12:51 PM »

The quick answer is 'No.' But I guess you have found that out already. A 385 type would be fine, but 380s and most 400s are evil little power houses at 7.2v. 11.1v, well, I think you know the answer to that one already :}
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U-33

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Re: Quick question...
« Reply #8 on: September 03, 2014, 05:49:50 PM »

I certainly discovered the amount of power these things have...in one move.

Back to the drawing board, the repair department, the superglue department...etc.

Rich
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Rich

K-157 Vepr. Akula-II (project 971U)
---------------------------------------------------------------

~~~~~~~  "Motorflotes need love too...."  ~~~~~~~

MotorFlote build log : http://www.modelboatmayhem.co.uk/forum/index.php/topic,15222.0.html

IanPal

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Re: Quick question...
« Reply #9 on: September 03, 2014, 06:46:24 PM »

I have a new-ish 385 motor here if you need it......
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U-33

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Re: Quick question...
« Reply #10 on: September 03, 2014, 07:05:44 PM »

I'm ok for motors mate, thanks anyways..I have three brand new 385's, should have used one of those really. I now need a new resin motor mount, possibly a new end cap, new prop shaft...the list goes on and on. That'll teach me...

Rich
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Rich

K-157 Vepr. Akula-II (project 971U)
---------------------------------------------------------------

~~~~~~~  "Motorflotes need love too...."  ~~~~~~~

MotorFlote build log : http://www.modelboatmayhem.co.uk/forum/index.php/topic,15222.0.html
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