Subject:
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Re: How to make a differential when you've got no one?
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Newsgroups:
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lugnet.technic
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Date:
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Fri, 20 Dec 2002 08:01:08 GMT
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Viewed:
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901 times
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In lugnet.technic, Luis Hernández writes:
> I'm still working in the sports car (which I think will be about 8-10 studs
> longer and 4 wider than 8408... using the same wheels). The frame is almost
> ready, and it will include 2-speed gearbox (if I can, I'll build a 3-speed
> one and pop-up headlights) front independent suspension and maybe rear live
> axle.....
I suppose you meant to write 8448 and not 8408?
> Maybe because I have seen many lego suspension systems (from official sets
> and MOCs)(and no-suspensions also)... and almost all of them have a
> differential gear... almost because the 8840 doesn't have it... it only has
> 1-wheel-drive!!!!
> (don't you believe me? check here:
> http://library.brickshelf.com/scans/8000/8840/ )
>
> So I've got some questions:
> 1) Are differentials so important when builiding cars? What would happen if
> I don't use one?
When the vehicle is turning the rear wheels could be said to describe circles,
the inner wheel is in a smaller circle then the outer wheel. Thus, the outer
wheel has to travel a greater distance (do more revs) then the inner one. If
the back axle is stiff there is a lot of friction and stress on the wheels,
axles etc. and this affects the stering a lot. It works but at least on of the
wheels will be skidding and hopping around.
See this page for more on this:
http://www.howstuffworks.com/differential.htm
> 2)I don't have any differential gear (If you want to know what do I have,
> are these sets: 2854, 8207, 8216, 8226, 8232, 8236 and 8422; one each one)
Check this page to see what sets has the differntial:
http://www.peeron.com/inv/parts/6573
> Is it possible to build a working differential? and how without having to
> make a 1wd car?
Yes, as Stefano said, check:
http://www.lugnet.com/technic/gears
Best regards,
/Tobbe
http://www.lotek.nu
(remove SPAM when e-mailing)
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Message is in Reply To:
 | | How to make a differential when you've got no one?
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| I'm still working in the sports car (which I think will be about 8-10 studs longer and 4 wider than 8408... using the same wheels). The frame is almost ready, and it will include 2-speed gearbox (if I can, I'll build a 3-speed one and pop-up (...) (22 years ago, 19-Dec-02, to lugnet.technic)
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