Subject:
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Re: Motor-powered 8880??
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Newsgroups:
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lugnet.technic
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Date:
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Fri, 17 Dec 1999 10:25:20 GMT
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Viewed:
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650 times
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Johannes Keukelaar <johannes@nada.kth.se> writes:
> I would think that this is very hard. There is a lot of friction in
> the drivechain for the 8880.
Right on. Not only that, but the transmission on 8880 is designed to
have the motor pushed by the wheels. If you want it the other way
around, you'll need to "reverse" the transmission/gear box as well.
A bit simplified, you can say that at 1st gear, the 8880 transfers the
power from the wheels to the motor virtually 1:1. At a higher gear, the
power from the wheels is geared _down_. Now, if you power the motor in
stead, the motor sees this as geared _up_, which is, needless to say, to
hard for the motor to drive. So to power the 8880, you will probably
need to redesign the whole gear box.
I've made a four speed/four wheel drive vehicle once, but the drive
train had so much friction that it was useless. Even when I did take
care to design the gear box the other way around, with respect to the
8880.
Fredrik
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Message has 1 Reply:
 | | Re: Motor-powered 8880??
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| (...) The simplest way to do this is to add a reduction before (or after) the gearbox. I agree it's not a beautifully methode, but is works . An other option is to switch the input- and outputaxle's, so the mid-differential is linked to the (...) (25 years ago, 17-Dec-99, to lugnet.technic)
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Message is in Reply To:
| | Re: Motor-powered 8880??
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| "Pat" == Pat <patrickemerson@mindspring.com> writes: Pat> I know I asked this question a bit earlier this month, but it was Pat> in a message specifically on modified 8880's and I thought a more Pat> descriptive title might get more response. Has (...) (25 years ago, 17-Dec-99, to lugnet.technic)
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