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After machining his first gear late last year, Adam incorporates it into a build he’s been wanting to make for a long time: a supersized flywheel powered toy car that can move with tremendous energy. He’s assembled a series of large gears that make up the scaled-up gearing arrangement of this car, and pressing those gears together with the flywheel is going to be the a big challenge.
Shot by Adam Savage and edited by Josh Self
Music by Jinglepunks
Part 1 of this build, Machining a Gear:
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Intro bumper by Abe Dieckman
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#adamsavage #onedaybuilds #machining
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Is your fly wheel too light? Is the weight ratio per gear equal to the small one?
Machine the flywheel so that the spokes are much thinner, and the main mass is at the very outer circumference. That and larger diameter wheels would also help. I know I'm mostly restating comments that others have already made, but not necessarily together.
Can anyone remind me what the name of those metal blocks are @44:35 ?
Adam is a national treasure.
This is me every time I put a ton of work into a project and think everything is finally perfect and then there’s just some massive oversights that completely ruin it and make it way under perform.
great work. I think it is too heavy the gears pinions must be thiner. The frictions also are too great… well even so it-s a great job !
id suggest that the flywheel isnt heavy enough, i.e. doesnt have enough mass to overcome the other forces on it.
Needs grease
Giant Flywheel car 2.0 coming soon? 🤓
wheel and axle diameter are too big
"Murder Foil"
When I was in high school machine shop I cut some aluminum a bit too deep on the lathe and ended up with a giant nest of that stuff. Sliced my thumb down to the bone trying to unravel it from the lathe. That stuff is no joke.
Die grinders are the bane of my existence, the shavings they make are so incredibly sharp yet still light enough to get absolutely everywhere
The fundamental problem is 2 fold:
1. You are not storing enough energy in the flywheel
2. The parasitic mass of the vehicle (everything other than flywheel) is too high.
Overcome item 1 by making larger or heavier fly wheel, or the better solution higher gear ratio (which is what everyone else suggests, since that won't add weight to vehicle), which will make flywheel spin faster but will be harder to accelerate and may introduce other issues like max speed on bearings/gears.
Overcome 2 by reducing weight of all components other than flywheel.
EDIT:
To clarify, higher gear ratio means 1 turn of wheels translates to many turns of the flywheel to maximize flywheel speed. Accelerating the car should be much harder than barely moving it; that way you can store more energy into its flywheel per foot of driving it by hand than it will expand per foot of motion.
Nice build and video!
Your flywheel seems to have a lot of air resistance in the wide spokes at high rmp, and thats killing the whole idea of storing energy in a fast spinning flywheel. Try closing the gaps between the spokes whith sheetmetal or use another kind of solid metal wheel.
Oh well, it'll still chew your fingers off
WOT
28:00 i think you need to get yourself a fireball tool vise lmao
Tasty build, crude mechanics and tamed unleashed force
better design would be to not use teeth but just solid metal cylinders
Hey Adam.. fellow tinkerer from canada would like to know… have to ever had a vice snap while reefing on it ?
Switching out to less heavy gears would probably help it but the flywheel itself is also not spinning as freely as it should, as others point out you probably need a heavier flywheel proportional to the overall weight or to cut down a ton of weight elsewhere in the car to make that one work. Still I envy you its such a cool project to tinker with and make incremental improvements!
I don't understand how people can over exaggerate the ability of a flywheel.
Dude, add a motor to spin that flywheel up to ignorant speeds, then go.
You need more weight in a more large flywheel.