Subject:
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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 04:28:16 GMT
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Viewed:
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12448 times
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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:
http://guide.lugnet.com/partsref/search.cgi?q=2838c01
and a light and sound type battery box. (this is minifig scale, so I want as
compact a battery box as I can find.)
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?
thanks
Magnus
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Message has 2 Replies:
 | | Re: Motor problem
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| Hello Magnus, (...) From the symptoms you describe I would say you need "a bigger battery box". Battery boxes (and motors too) contain a current limiting device. It is a resistor whose value increase (a lot) with temperature. When you start your (...) (16 years ago, 14-Jul-08, to lugnet.technic)
| | | Re: Motor problem
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| (...) 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 (...) (16 years ago, 14-Jul-08, to lugnet.technic)
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