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Building Integrity
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Date:  4-24-2014
Number of Hours:  7.00
Manual Reference:  ch 9
Brief Description:  Wheel pant installation

7 hours of tedious trial and error work today. Following the instructions I first set up the plumb line again, lifted the nose to 1.5 degrees up (flight attitude) and began cutting away at the pants. It took several trips back and forth from the floor to the drill press to get the cutouts large enough to clear the tire and legs without making them too big. Everything here requires tight tolerances and correct angles. You don't want to spend time and money making beautiful wheel pants that end up rubbing on a tire and cracking. The GOOD news is that once I have this pant finished, the next one will go 3 times as fast. I'll be able to use this one as a template and guide to mirrior the other one. I also changed the nose up angle of the aircraft to 1.5 degrees vs 2.0. I truly believe that Rutans o-235 powered ez cruised at a speed that set the angle to 2 degrees. However, cruising 30 knots faster than his means more down trim required. I therefore have confirmed my canard to be .5 degrees lower, the engine mount .5 degrees lower and now the wheel pants to fly straight ahead at 0. This all means to say I'm assuming .5 degrees LESS angle of attack for a faster bird. Let's hope I'm right.
I'm also a little concerned that it took 2 - 2x4's to get 1.5 degrees up on the nose. HOWEVER I know I'll be adding 370lbs of wings and engine that will hopefully make that butt squat down a bit. I'll be carefully measuing my resting angle of attack after she moves to the airport and the wings go on.
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1.5 degrees nose up

1.5 degrees nose up

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final position

final position

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