Subject:
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Re: Motor problem
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Newsgroups:
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lugnet.technic
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Date:
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Mon, 14 Jul 2008 07:34:32 GMT
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Viewed:
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20039 times
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In lugnet.technic, Magnus Lauglo wrote:
> When I turn on the motor, the rotors spin and the lights comes on, but then the
> light fades and goes out, and the rotors slow down until they stop entirely.
> Wha?
>
> So do I need more powerful motor? A bigger battery box? I would have thought
> that you need much more power to start the rotors spinning than you do to keep
> them spinning, so I'm surprised that it starts just fine but then seems to run
> out of steam. Any suggestions?
Hi Magnus,
a variety of reasons comes to mind:
- Are you using a rechargeable battery? The 9V types of rechargeables sometimes
lose power too quickly for such a rather demanding application.
- If you let the motor run freely (i.e. without any load attached), does it show
strange behavior like varying rotation speed or screaming noise?
- If all else fails, have you checked the attached transmission whether it may
simply have too much friction in the long run? If the motor is brought to a halt
due to friction, that will drive up the resistor effect of the motor, resulting
in - among other effects - the lights to fade as well.
After all, the old 9V motor is not exactly a powerful device. It could be that
you would be better of using one of the newer so-called "Power" motors, which in
turn have a very low rotation speed, so the heli wouldn't look as realistic
anymore. Everything has its drawbacks I guess...
Regards,
Jerry
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Message is in Reply To:
 | | Motor problem
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| Hello, I wondered if any motor-savvy Technic experts out there could help me out with a problem. I'm building a helpicopter, and am powering two rotors plus a light and sound double red light with a single old motor: (URL) a light and sound type (...) (18 years ago, 14-Jul-08, to lugnet.technic)
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