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Bill & Brendas RV-8 QB
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Date:  7-14-2014
Number of Hours:  2.00
Manual Reference:  
Brief Description:  rudder deflection

Raised tail up on a saw horse and plum bob a center point o ground in line with rudder attach bolts.
Ran another point off the taillight screw which is cengtered on trailing edge. Marked on ground.
Connected the two points for my longitudinal center line for rudder.
Marked current deflection rt and left and determined that I had about 25 degrees. Need 30.

After trying to get angles with protractor on the ground, I decided to just measure distances in centermeters and then use math for the angle. Mostly used cosign and then double checked with tangents. This is easer.

I would mark for a thin cut on the rudder stop and cut it with the dremmel and then scotch brite wheel to clean up. Drop plum bob and mark. Measure new length of the hypotnuse(sp?) and do quick calculation for the new angle. Then repeat as necessary. The goal is 30 to 35 degrees deflection with min gap between rudder and elevator of 1 inch.

After back and forth on each side, I settled on 31.4 degree deflectiuon rt siude and 31.7 degrees on left deflection. Minimum gap between rudder and elevator on rt side is 1 5/8 inch and close to two on the left. I have left room on deflection to shave more off the stops and get close to max deflection if need be but my bottom cap is rubbing slightly on the fuse aft bulk plate flange as it is. Im in the required range at the moment.
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Tail lifted up and center hinge point marked and trailing edge marked for ref

Tail lifted up and center hinge point marked and trailing edge marked for ref

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Made series of cuts to stops and made swing lines until 30-35 degrees achieved

Made series of cuts to stops and made swing lines until 30-35 degrees achieved

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Rt side rudder stop after trim and polished edges

Rt side rudder stop after trim and polished edges

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