The Murphy Builders Site

Rebel builders

I just assembled for the first time the finished horizontal stab and the
elevators. I wanted to see how they looked assembled and check for free
rotation. The "up" elevator travel is free to move well past 45* but the
"down" travel is restricted to 17* due to interference with the bottom leg
of the main (rear) spar (ST-27) and the control horn (CC-43). At this stage
of assembly HOW MUCH DOWN TRAVEL IS REQUIRED and what is the preferred
solution? Do I grind a small notch in the spar leg or the control horn or a
little on both?



On the subject of elevator travel. I hope to build light enough to fly under
the LSA Pilot Rules so when the aircraft is completely assembled what is the
preferred up and down elevator travel? The only reference I can find in the
manual is under CONTROL INSTALLATION 20.8 step 16. "Trim opening to allow
25* up and 25* down deflection of elevator".



Merry Christmas to all and Happy Holidays

Charlie E. 802R




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Thanks to all for the response on the amount of down elevator travel. Wayne
your were right. I ground a 3/16 x 1/2 wide notch in the lower leg of the
main spar and now the elevator down travel is 30*. You guys on the net are
great.



Merry Christmas and Happy Holidays

C. Eubanks 802R




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