Idea of "SMA SunMill"

[Khwartz]

BTW, an other very different conception I thought was a very "Unbalanced Gravity Wheel" kind.

Indeed, in an ordinary use, an "Unbalanced Gravity Wheel" needs the masses around it to overcome the waste of power due to the friction.

For example, when one of the mass comes to the apex, the top of the wheel, it often needs a kind of "kick" to change of side on the wheel.

Now, imagine that kick is now given by an SMA actuator/muscle (or even any other kind of changing shape actuator, like moisture or expansion ones), shouldn't the mass turns indeed the wheel after each kick made by heating the Nitinol or else, just when the mass needs its kick, so just before it arrives at the top of the wheel?

I will try to make a drawing of an example of how it could function; if I can upload it! 

[Khwartz]

For the "pure" SMA Mill (or wheel), I thought about using springs or other piece of SMA wire or else, to no more need a "training" of SMA for 2 ways memory shape; one would "work against" the other:

First the SMA wire or blade or else, is heated and for example straightening, then, when it is cooling, the spring or other piece of SMA or else but an elastic material, "recalls"/pulls back the SMA to its initial or curve or else, shape.

It could function BTW purely by expansion/dilation with no plying nor curving needed but pure straight wires or like.

[Khwartz]

Half a dozen of videos made and hope soon available on my YouTube channel (presently uploading but could take few hours), with a new idea of "Skin Spring Mill" but have troubles to upload them on my channel.

Nevertheless, would be far simpler, imho, if we could find a good enough SMA for training it in a "two ways shape memory" (recall of two different shapes : one hot, one cold), while no need of "pull-back springs").

Is there anybody here who knows the perfect nitinol or else for that? :/

[Khwartz]

3 videos uploaded:

"SMA Sun Mill": Simple "hair" 2. https://youtu.be/JaNjgtB6hbU

"SMA Sun Mill": Simple "hair" 2. https://youtu.be/TgxlnDYjU5Q

"SMA Sun Mill": "double-hair" 1. https://youtu.be/uea_bsfHnQM

Next "SMA Sun Mill": "double-hair" 2 and "Skin Springs" 1 and 2.

[Khwartz]

Video "SMA Sun Mill": "double-hair" 2 : https://youtu.be/uR7NGH9DRMw