Incidence experts needed!
12-23-2007 | 05:38 PM
#1
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From: Lumberton,
NJ
Incidence experts needed!
Maybe I should never have looked, but I put an incidence meter on my plane and WOW! What a suprise.
I bought a WH 28% Edge V1.1 last year and am just now getting around to starting...er, finishing it. This is my first big gasser, so I wanted to do it right. The dowels on the left wing didn't line up with the holes on the fuse, so I put a meter on it to make sure I didn't change any angles while adjusting the holes.
I needed something to calibrate from so I started with the right side stab and set the meter at zero. Here's what I found:
Right stab root 0" (calibrated from here)
Right stab tip 0"
Right wing root -2"
Right wing tip -1.25" (positive washout?)
Left stab root -2"
Left stab tip -2"
Left wing root (this is my problem child, but I don't know where to set it)
Left wing stab
If anyone has any guidance, I'd greatly appreciate it.
I bought a WH 28% Edge V1.1 last year and am just now getting around to starting...er, finishing it. This is my first big gasser, so I wanted to do it right. The dowels on the left wing didn't line up with the holes on the fuse, so I put a meter on it to make sure I didn't change any angles while adjusting the holes.
I needed something to calibrate from so I started with the right side stab and set the meter at zero. Here's what I found:
Right stab root 0" (calibrated from here)
Right stab tip 0"
Right wing root -2"
Right wing tip -1.25" (positive washout?)
Left stab root -2"
Left stab tip -2"
Left wing root (this is my problem child, but I don't know where to set it)
Left wing stab
If anyone has any guidance, I'd greatly appreciate it.
12-23-2007 | 06:46 PM
#3
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From: Cedar ParkTx
RE: Incidence experts needed!
ORIGINAL: tankertoad
Maybe I should never have looked, but I put an incidence meter on my plane and WOW! What a suprise.
I bought a WH 28% Edge V1.1 last year and am just now getting around to starting...er, finishing it. This is my first big gasser, so I wanted to do it right. The dowels on the left wing didn't line up with the holes on the fuse, so I put a meter on it to make sure I didn't change any angles while adjusting the holes.
I needed something to calibrate from so I started with the right side stab and set the meter at zero. Here's what I found:
Right stab root 0" (calibrated from here)
Right stab tip 0"
Right wing root -2"
Right wing tip -1.25" (positive washout?)
Left stab root -2"
Left stab tip -2"
Left wing root (this is my problem child, but I don't know where to set it)
Left wing stab
If anyone has any guidance, I'd greatly appreciate it.
Maybe I should never have looked, but I put an incidence meter on my plane and WOW! What a suprise.
I bought a WH 28% Edge V1.1 last year and am just now getting around to starting...er, finishing it. This is my first big gasser, so I wanted to do it right. The dowels on the left wing didn't line up with the holes on the fuse, so I put a meter on it to make sure I didn't change any angles while adjusting the holes.
I needed something to calibrate from so I started with the right side stab and set the meter at zero. Here's what I found:
Right stab root 0" (calibrated from here)
Right stab tip 0"
Right wing root -2"
Right wing tip -1.25" (positive washout?)
Left stab root -2"
Left stab tip -2"
Left wing root (this is my problem child, but I don't know where to set it)
Left wing stab
If anyone has any guidance, I'd greatly appreciate it.
Right stab root +2"
Right stab tip +2"
Right wing root 0"
Right wing tip +.75"
Left stab root 0"
Left stab tip 0"
Food for thought.
12-23-2007 | 07:05 PM
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From: Flower Mound (near Dallas),
TX
RE: Incidence experts needed!
First, use the top edge of the fuse where the canopy frame mounts as the baseline.
Adjust the other parts to be 0 relative to the baseline. Do this by enlarging the aliognment dowel hole and rotate the surface until correct, then;
on the wings, glue a new donut over the dowel to secure the location.
on the stabs, fill the void with epoxy.
Anything within 1/2 degree is within tolerance.
I would not worry about the wash-in until you fly it, that could be caused by the aileron being slightly off center and be an actual twist.
TF
Adjust the other parts to be 0 relative to the baseline. Do this by enlarging the aliognment dowel hole and rotate the surface until correct, then;
on the wings, glue a new donut over the dowel to secure the location.
on the stabs, fill the void with epoxy.
Anything within 1/2 degree is within tolerance.
I would not worry about the wash-in until you fly it, that could be caused by the aileron being slightly off center and be an actual twist.
TF
12-23-2007 | 07:14 PM
#6
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From: Lumberton,
NJ
RE: Incidence experts needed!
Thanks Tom! As always, fantastic support from WH 
-MT
I'll jump out of this thread and back into the build thread with pics and progress.
-MT
I'll jump out of this thread and back into the build thread with pics and progress.
12-23-2007 | 07:39 PM
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From: Lumberton,
NJ
RE: Incidence experts needed!
I guess most average flyers like myself don't usually check and just trim it out in flight. Thanks again for the info[sm=teeth_smile.gif]
