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Posted

The car is really good but I think your video skills are just outstanding! :thumbup:

Presentation and advertising are just as important as the product :laugh:

Posted

I make them and print them on a white sticker foil.

OK, that similar to my technique. I always struggled on how to make non-square stickers as there are hard to cut out, but on close examination I see they are all square or round, with very well matching background color.

Posted

Looks like the gearbox is actually of some use - just about every other gearbox that I've seen takes long enough to shift that the vehicle either slows dramatically or stops, which means that it loses all the momentum it had and the motor has to start it moving again in a less-than-optimal gear range.

Posted

Very nice MOC Sariel. The stickers bring it to another level.

Have you thought of testing the speeds of your models on a smoother surface? Something like a basketball court, or even the RC track where you recently shot a video? It seems like you could use the power needed to overcome road imperfections to get more speed.

Posted

Thanks. I've done a vehicle that went over 20 km/h a while ago and it was almost nothing but motors, RC unit and wheels. So a model like this one won't even come close, which is why I'm not particularly obsessed with its speed :)

Posted

Have you thought of testing the speeds of your models on a smoother surface? Something like a basketball court, or even the RC track where you recently shot a video? It seems like you could use the power needed to overcome road imperfections to get more speed.

I've been doing some thinking on the Physics of gearboxes in electric vehicles lately. With an internal combustion engine, the reason you have a gearbox is because the engine can only operate over a limited range of rotational speed, and the power is concentrated at certain rpm. Without more gears, you would hit 6000 rpm and couldn't go any faster even though you have more power, just because the engine can't rotate any faster. Electric motors are usually torque limited, not speed limited. By this I mean that the reason you can't go faster is because you are out of power. From that point of view, adding more gears doesn't help any because you are still out of power. This rationale seems bourne out by R/C cars. Nitro powered cars often have a gearbox, but electric cars never do even though they are just as fast.

Having one gear for crawling and one gear for speed makes sense.

That was all just a thought exercise. I still love this model and I love gearboxes!

Posted

Love the clean lines. How does the RC unit work? Is power proportional?

Gear boxes in Lego most of the time are useless but here the dual function makes it a lovely addition.

Posted

you probably don't want to be going much faster - the front wing is working the wrong way :wink:

Didn't notice that bit (and I know quite a lot about F1 aero). Do tell.

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