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Date:  6-30-2018
Number of Hours:  4.30
Manual Reference:  16-01/02
Brief Description:  Controls - Roll

Mocked up all the fuselage tubes and bearings, and it just doesn't work, pipes going through the aft bearings are out of alignment. Re-check all measurements and it seems good. Recheck the holes in the seatback and they are in spec. Measure left/right displacement of stick using the displacent of the tip of the stick and trigonometry for the angle, allowing a margin for whatever stick grip I install eventually. I get 23 degrees outboard and well in excess of 20 degrees inboard. This leaves no margin for making CS-109 thinner.

Checked the seatback holes again and they match the plans. Plotted where the armrests go, The tubes could go through the seatback up to 2" from the sides, so adjusted out the holes a bit, still no good.

Holes in firewall and landing gear bulkheads checked for position and cleaned up a bit, still no good.

Ultimately decide the seatback aft 1", with the CS-105/116 adjusted to put the universal joint in the same position relative to the seatback as the plans, and the placement of the aft bearing CS-118 in the plans position has messed up the geometry. Decide the bearing needs to shift aft 1", drop 1/4" and be 1/4" narrower and so adjust.

As I refit all the re-done hardware notice for the first time that the thicker spherical bearing I am using will move the relative position of the stick back behind its FS! After some deliberation adjust CS-109 to FS 45.82. I could just not be buggered making a 4th set of CS116, so adjust the position of CS118 to provide a 1/16" gap to the bearing.

One little change I had proved in my mockup I didn't need, but persevered with for W & B considerations has bitten me on the arse time after time!!@!
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S'not working...

S'not working...

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Hmmm, working. Kinda.

Hmmm, working. Kinda.

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Making aeroplane noises and holding a real stick!

Making aeroplane noises and holding a real stick!

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