First Ticker - Scimitar

[marklazarz]

I finally got around to building Scimitar.  I used flanged bearings in the frame so the entire shaft moves instead of using a fixed shaft with bearings on the individual components.  I goofed up by not building an extended arbor at the weight location so I machined and epoxied on a couple of steel fender washers to manage the downward force.  It actually works pretty good and keeps the weight spool close to the frame.  I'm waiting for  another shipment of bearings to mount the vanes.  There is no finish on the plywood because I wanted to build Scimitar as a learning tool rather than wall art.  My comment to anyone building this project is to add extra set screws to the vane shaft components because the ratchet impulse is rather violent and can easily change the timing if not tightly secured.

Thank you Art for a great project and complimentary YouTube video.  I hope that you post the "Bat" project some day because I'm really interested in counter rotating concentric shafts.

Mark

[BobL]

Nicely done Mark.. Congrats..

[marklazarz]

Thanks Bob, I don't know why the last photo was sideways.  Is there a way to correct that when uploading?

[John T]

Way to go - I'm sure there will be many more of various types to follow.

John

[ArtF]

Awesome..!!

  As to the bat, I dont have the original drawings of the one I made, it was made as a test,
and made wrongly.. the release pawl I used is driven by magnets, but the real way to do it is
with a pawl thats the right shape, I never got around to correcting it because the damn thing is
so large I cant put it  indoors. BUT, if you guys want, I will take it apart and post photos of its
internals so you can see how it works.. It wouldnt be hard to duplicate in smaller version I suspect..

Art

[Ken_Shea]

Art,
Is that the one your wife had removed from inside?  ;D

[ArtF]

Ken:

No, never was inside, I built it in the shop, and when I hung it I could see it was way too
large for the house.. didnt even try.

Art

[marklazarz]

Scimitar lives!
https://youtu.be/SM3Qky85c5k

Learned about timing, balance, bearings, shafting, shaft supports, recoil chronometer escapement tuning and placement of components using spacers.  All that from this one little project!

Thanks Art!

[ArtF]

LOL, fantastic Mark..

  I always find it funny to see a Scimitar, the original hangs in my living room
and gets compliments from all that see it, and yours is so remarkably close to mine
its like seeing my livingroom expand out into the ether..

  Im really pleased it worked so well there, (yours may work a bit better than mine. )
Great Job!

  I agree with you, by the time you build a scimitar, youve learned so much your
ready for more complex projects..

  (How about the drawing robot one.. )

Art

[BobL]

Nicely done Mark... Looks and appears to work flawlessly... Great job


Cheers
Bob