Re: 12V to 7.2V DC converter circuit?

On 2006-05-11, g20zoom@xxxxxxxxx <g20zoom@xxxxxxxxx> wrote:
Thanks for moving the post. Sorry, I didn't know.

I think I need about 3-4 amps. It's a motor to start a small nitro RC
engine (.15 size)
I guess the motor is about a mabuchi 380 in size.
The starting requires a bit of pulse starting(ie on for 15-20 seconds
off again, on again) so I imagine the initial start loads maybe a
little higher?

I took this from some other posting on the web:
checked the specs for the 380/400 motor too :Specification
Nominal voltage 7,2 V
Operating voltage range 3,6 ... 8,4 V
Current drain when stalled 21 A

for starting the electric motor you need the stall current.
you may do better using a 12V motor from a
windscreen wiper or cordless drill, or using a 6V
motorcycle battery as a power source.



--

Bye.
Jasen
.

Relevant Pages

  • Re: 12V to 7.2V DC converter circuit?
    ... I didn't realize this would be more complex to get the stall current. ... I figured...hey I have a 12V car battery that's always charged...and ... I guess the motor is about a mabuchi 380 in size. ... Operating voltage range 3,6 ... ...
    (sci.electronics.basics)
  • Re: Auto Engine Conversion Video
    ... At 14.40 into it the video locks up. ... I would like to have seen a bit of statistics, or specifications, such as engine ... My plane weighs 150+ lbs more then the factory ... With this big motor and the climate I live in I hate slow starting ...
    (rec.aviation.homebuilt)
  • Paul Lamar....
    ... The motor mount is incorrectly ... The numbers quoted above shows a lack of understanding about engine ... My experimental plane has been flying for 5 years and 300 hours. ...
    (rec.aviation.homebuilt)
  • Re: (OT) Any experience with Japanese Domestic Market engines?
    ... I drained the oil into a catch pan then poured it into the recovery ... and found bubbles in the catch pan. ... in the same pile on the driveway, and the engine bay is now coated with oil. ... are not allowed to keep a motor for longer than 30k-ish miles. ...
    (alt.autos.toyota)
  • Re: Another engine run in thread :) - lst2 & misc questions
    ... Doc if you read this thread how did you run in the engine on your ... Run the first tank as rich as you possibly can at idle. ... plug the exhaust and kill the motor. ... This is a method of heat cycling that slowly raises temps and allows the ...
    (rec.models.rc.land)