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Rubber Band-Powered Pullback Racer
Published 3 years ago
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Okay, so a little bit of a story with this one:

A couple of months back, I started looking for ways to create a fully-functioning pullback motor WITHOUT using an actual pullback motor.
Of course, as one could imagine, this was kinda tough; there aren't really that many examples of rubber band-powered cars that have really made it onto the toy car market. Moreover, the inherent design flaws of the gearbox-like bricks from the Technic line make it so that unless you specifically use a specialized pullback motor, chances are it's going to be very difficult - if not impossible - to design and implement a non-specialized, fully-functioning pullback motor. A design flaw that I spent about two months ruminating on.

Then, I discovered THESE little beauties: http://hotwheels.mattel.com/shop/en-us/hw/speed-winders-cars#facet:&productBeginIndex:0&orderBy:&pageView:grid&minPrice:&maxPrice:&pageSize:&contentPageSize:&
These are special rubber band-powered cars created by Hot Wheels as a part of their Speed Winders sub-series.

...Needless to say, it's not hard to see where I took my inspiration from.
But more importantly, now that I've gone and applied the same idea to this Technic racer, I think I may have changed the game a little bit. Don't get me wrong; I'm quite certain that there have been rubber band-powered Technic cars before, but I'm willing to bet that no one has done it like this before.

Anyways, before I sign off, I'd like to see YOU - the viewers - get involved. If you think you can improve my system, or even come up with a smaller, more powerful system, PLEASE send me a link or two; I'm looking for a challenge and I want you guys to provide it for me.

So, I hope I've given you guys some inspiration, and until next time, enjoy!


(Also, I think I'm gonna name this car..."Prototype R-24". Yeah...that sounds good.)


(12/13/17 EDIT: Changed the gear layout on the rear axle. Masman8675 pointed out that having two gears would lock up the rear wheels. Many thanks to him for spotting the error. smiling face with open mouth and smiling eyes)
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3 years ago
This is really cool.

There is one problem though, the rear axle should only have 1 gear on it. If it has 2 gears it will be locked in place.
3 years ago
@Masman8675: Derp. My bad. I'll get that fixed in just a minute.
3 years ago
Just testing the new render feature of the best LEGO editor on this planet.
75 models | 1.6k views
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