This is the teetering rotorhead I just made.

and...

And the last picture. I'm not sure how much I should let it teeter, and ideas?

Someone sure has been busy with his lathe. Looking good, Rich!

This is a picture of the rotor head mounted on an A of A gearbox.

Now all I have to do is build the gyro, I'm thinking of something like a Goofy with a Wankel for power.

Hi,
It looks like your teetering rotor head has way to much teeter. the plans for my chipawa four autogyro say to set the head teeter to 3 degrees. one degree equals one inch of movement at 58 inches or 1/2 inch at about 27 inches from the teeter hinge pin.
Lots of luck.

Earl.

Thanks, I've never read anything about them, just saw one fly. I'll put limiter stops on the rotor arm.

This is the rotor I saw in Martiinsville, and it does indeed look to have very limited teetering.

I was going to put an Allen bolt on each side to limit teetering, but from looking at this picture I think I'l just lower the pivot so the rotor arm hits the hub on the bottom to limit teetering.

I tried to lower the teeter bar, but I couldn't without a lot of work, so I went back to the limiting stop bolt idea. In the picture the teetering bar is at it extreme teeter angle. One good thing about using this method is I will be able to change the amount of teetering and see how it effects the flying.

What's the max teeter angle??? Can you tilt the head ~ forward, backward, side to side or is it fixed?

Steve Carey
http://www.skylites.freeserve.co.uk

The max is about 30*, but now using the limit stop bolts it's about 5*. I would think that less teeter the better, up to the point where the differential lift starts to roll the gyro. I'm assuming that the teeter is used to eliminate this rolling motion. If you have too much teeter the gyro will be impossible to roll.

I'm going to use it fixed. I don't think the teetering rotor head is the way to go for a DC gyro, your small inputs would be canceled out by the teetering. I would think that the plate hub of A of A would be the way to go on a DC gyro.

Rich,
I have been looking at what you are doing and was wondering if you are threading the hub on the Master Airscrew Reduction Unit or have a nut to hold it on?
Jim

I drilled the bottom with a 1/4" drill, then counterbored the bottom from the top down to hold the 1/4-24 nut that comes with the Masterairscrew gear housing.