Kinetic Energy Flipper

[typhoon_driver]

Re: Kinetic Energy Flipper

the cylinder required would be tiny in comparison to a flipper cylinder

[Ellis]

Re: Kinetic Energy Flipper

Uh, I think this is actually getting worse confusion-wise!

I believe he meant you could use a hydraulic disc-brake caliper, the cylinder of which you would power with a strong servo or similar instead of with your hand. So imagine the brake handle on a bike powered by a servo, and the flywheel is the bike wheel.

I don't think it would work. It would slip, which would sap up power. It would have the grip at full compression of the caliper to do the job, perhaps, but in getting there it'll slip, causing all sorts of problems. It would have to be a locking pin like system.

[ewan]

Re: Kinetic Energy Flipper

Three different viable methods of kinetic energy storage device tried to date seem to be:

1) Pin/cam engaged flywheel as on the Whyachi machine and one of 'Dale's robots' creations
2) Screw thread/momentum based 'dog clutch' trigger, as a builder called Glen in the US has tried and me at beetleweight scale
3) Continually rotating 'flipper' with spring-steel or similar contact surface and and high-speed flywheel maintaining momentum through an impact, as on this machine

Never come across a conventional brake based flipper, not that I can remember anyway

Actually I'm looking forward to having some spare time to finish that beetle.. one day

[Max]

Re: Kinetic Energy Flipper

On the dog clutch mechanism what stops the flywheel climbing up the screw when the motor is running?

[typhoon_driver]

Re: Kinetic Energy Flipper

Nothing. You want it to climb or move along the thread to move away from the engagement point. Stop spinning the thread and watch the flywheel engage

[ewan]

Re: Kinetic Energy Flipper

Well what stops it unscrewing most of the time is the acceleration of the flywheel - this force (F=ma..) will make it screw down onto the pulley/driving surface until the shaft/thread is braked and then it will unscrew itself with its own momentum

[typhoon_driver]

Re: Kinetic Energy Flipper

Sorry to be anal but with rotational dynamics it's not F=ma as it would be for an object travelling in a straight line. It would instead be Torque = moment of inertia x angular momentum. As the screwed thread is helical it is a component of the torque which acts to keep the flywheel in position before the thread rod shaft is stopped.

The nuts and bolts of the problem however is that a flywheel and threaded rod arrangement would provide a very effective means of transferring the energy to a flipper if you could engineer the individual components to survive the engagement of the flywheel.

[ewan]

Re: Kinetic Energy Flipper

Don't worry Gary, I know as much, F=ma is just a convenient abbreviation for the force due to change in momentum

[typhoon_driver]

Re: Kinetic Energy Flipper

Good good

[Max]

Re: Kinetic Energy Flipper

I couldn't quite wrap my head around this but I just stuck a bolt into the chuck of a drill with a nut on it and spun it up and I was able to see how when you stop the nut moves up a bit even with such little inertia. This is a really cool concept

[ewan]

Re: Kinetic Energy Flipper

My brain has become hard-wired to facebook mode.. this forum needs a 'like' button!

[ewan]

Re: Kinetic Energy Flipper

To that effect: https://www.phpbb.com/customise/db/mod/ ... for_posts/

[PJ-27]

Re: Kinetic Energy Flipper

I agree, can I share photos of my pets?

[mattsdragons]

Re: Kinetic Energy Flipper

Would a continuous spinning flipper arm just be classed as a spinner? If not then thats a cool idea

[tweedermeister]

Re: Kinetic Energy Flipper

I think it would, a bot in america ( whose name I forget ) uses a flywheel as a flipper arm because of the limit in rotation speed in the sportsman class because of the open arena.