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   xoxoxoBruce  Monday Jul 11 11:37 PM

July 12th, 2016: Proper Propeller Panograph

The Central Florida Aerospace Academy has this antique propeller duplicator.

The linkage on the side twists the axis of the cutter to match the roller

It follows the pattern with a roller.

I suspect the handle that looks like a baseball bat works the tilt.

I think these are style samples, not patterns. It's not as sophisticated as new fangled pantographs.
But it can get go going when your spouse dings the prop on your flying car.

Gravdigr  Tuesday Jul 12 12:09 AM

That's pretty cool.

burns334  Tuesday Jul 12 08:11 AM


glatt  Tuesday Jul 12 09:39 AM

Originally Posted by xoxoxoBruce View Post
The linkage on the side twists the axis of the cutter to match the roller
It looks to me like the bed that supports the work piece and the bed that support the pattern are what pivot. I think the roller and cutter can only move up and down, and the beds pivot to get the twisty shape in the propeller.

xoxoxoBruce  Tuesday Jul 12 11:25 AM

yes, they are on pivots, but what makes them pivot and how are the synchronized?

glatt  Tuesday Jul 12 11:56 AM

it's gotta be that unseen linkage on the left side.

Be nice to have some pictures from the other angle and some close ups of the controls sticks in the center.

xoxoxoBruce  Tuesday Jul 12 12:26 PM

The only linkage I see on the far side is the main square strut and two round rods connecting the follower and the cutter, nothing attached to the two beds.
OK, now I see what you mean, you feel the end on the left side of the picture is hiding linkage to synchronize the bed tilts. Could be.

glatt  Tuesday Jul 12 12:29 PM

Me too. But they have to be connected somehow, which means they are connected on the other side of the plywood, where we can't see them. I'm imagining a gear attached to each pivoting rod, and a chain connecting those gears.

Your reply here?

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