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But will it fly?
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May 12, 2015, 05:38:45 AM
At first blush this is just a “toy” regardless of the physics within, the prop assembly shown is about to take a solo flight, powered by a rubber band much like a free-flight model airplane -but wound up within its handle- acting on 6 bladed propellers, ‘till the operator willfully releases its stored energy - triggering the prop assembly spinning. 

The 2 magnetic discs separate just after the prop thrust exceeds the magnetic attraction; the magnet’s attraction is incrementally variable placing adhesive paper shim(s) separating the two magnets for its required attraction, at first unknown.  3 pins drive the props ‘till the pins retract out of their respective holes freeing the prop from the launcher pad for its free flight.  Quite a physics problem so it’s not really a toy is it?

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* May 12, 2015, 07:17:45 AM
#1
looks great, and does sound complex for a spinner toy, curious what causes the pins to retract? and if are going to build it.

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May 12, 2015, 11:23:24 AM
#2
Andy:

Think of a fixed length pins that are molded in the prop’s dome, these pins pull out (withdraw) from the three mating holes as the prop assy. becomes airborne.  The toy could be made on a 3D machine for a prototype - just to see if it works well.

Bob

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May 13, 2015, 12:38:26 PM
#3
This is an interesting design. This must be where you were using the twisted elastic that I saw discussions about in another thread.


May 13, 2015, 04:16:38 PM
#4
Don:

While the torque’s source isn’t visible from this angle it doesn’t negate its use - as is the latching shaft that takes place on the spinning member.  Perhaps better lighting would indicate those features; granted proper lighting always makes a huge improvement.

Thanks,

Bob

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