[MOC] BuWizz speedracer: the 2018 BuWizz speed record.

[Marxpek]

Hey everyone,

This summer I've spent most of my spare time trying to break @kbalage his BuWizz speed record, i can say that it was a lot harder than i had expected even with the upgraded V2.0

The design took a few different forms, mostly because almost every run ended with a crash and thus a rebuild, replacing broken parts and making slight improvements, but those where all minor variations, the basic design stayed the same. I am not that happy with the fragile front-end and winter is coming, this means no more time to test further and the time has come to publish the results, next summer will bring a new design which will be more sturdy and more powerful, i hope..(surviving a 40km/h+ crash is not really achievable anyway..)

I started out with the setup i have been using in my 100% Lego speed records, low to the ground, lightweight, 2,5:1 gear ratio and a minimal amount of "moving axle to pinhole" friction. This setup has never failed me and it hasn't in this project either.

The biggest problem was losing the connection, this happened in 2 ways, on range,I cannot run that fast, cycling works but it is very dangerous to do while being overtaken by a speeding piece of Lego which you also have to steer. But most disconnections happened because of the current protection kicking in when i accelerated too fast, I really had to accelerate gradually starting in the fast mode, then throttle down, swap to ludicrous mode and accelerate gradually again, making steering adjustments in the meanwhile if needed, all while running or riding the bike, very, very hard to do. That is why i am sure this can go even faster, i just never managed to make it happen.

It was the hardest speed record i have attempted yet, but it was great fun to do! I hope you like it, suggestions and tips for the next racer are always welcomed!

[kbalage]

Great, congrats for your new record! I know exactly how difficult it is to achieve this, how many tries and broken parts you have to face 

Winter is coming so it's a good opportunity to redesign stuff, I might give it another try next spring 

[Marxpek]

Thanks! I will be looking forward to your new attempt to break the record!

[Johnny1360]

Doing good, you have been chasing this for awhile, good to see your progress albeit a bit painful to watch it flying to pieces at the end of every run.