correcting uneven stab?
02-01-2009 | 05:35 PM
#1
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From: Greenwood,
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correcting uneven stab?
I'm building a WM T34 Mentor and the stabilizer is almost ¼” uneven when measured from my building table. How do I correct this? I was thinking about sanding down the stab opening somehow to get it closer then shimming to keep it even.
02-01-2009 | 05:41 PM
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From: Jacksonville, FL
RE: correcting uneven stab?
a picture is worth a thousand words....are you talking the stab is on fuselage and is off 1/4 inch? or the stab is laying on the table and one side is off a 1/4 in? is it a one piece stab or two connected by a rod?
02-01-2009 | 06:05 PM
#3
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RE: correcting uneven stab?
You don't align the stab from you bench. The stab needs to be parallel to the wing. Set the plane level and stand behind it with you eye at the level of the stab. Looking on both sides the stab needs to be level with the wing. If you try to measure from the bench as you're doing you'll more than likely wind up with a stab that is out of alignment. Look at the attached diagram. While this shows a high wing plane, the concept is the same for low wings.
And yes, you change the stab alignment by sanding the fuselage to level it out.
And yes, you change the stab alignment by sanding the fuselage to level it out.
02-01-2009 | 10:39 PM
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RE: correcting uneven stab?
ORIGINAL: RCKen
You don't align the stab from you bench. The stab needs to be parallel to the wing. Set the plane level and stand behind it with you eye at the level of the stab. Looking on both sides the stab needs to be level with the wing. If you try to measure from the bench as you're doing you'll more than likely wind up with a stab that is out of alignment. Look at the attached diagram. While this shows a high wing plane, the concept is the same for low wings.
And yes, you change the stab alignment by sanding the fuselage to level it out.
You don't align the stab from you bench. The stab needs to be parallel to the wing. Set the plane level and stand behind it with you eye at the level of the stab. Looking on both sides the stab needs to be level with the wing. If you try to measure from the bench as you're doing you'll more than likely wind up with a stab that is out of alignment. Look at the attached diagram. While this shows a high wing plane, the concept is the same for low wings.
And yes, you change the stab alignment by sanding the fuselage to level it out.
02-01-2009 | 10:57 PM
#5
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RE: correcting uneven stab?
You are missing a step.
1A. The tips of the stab need to measure the same distance from the center of the front of the fuselage. Otherwise, when you do step 2 the wing won't be square with the fuselage.
On step 2, you would have less error if you measure the tips of the wing back the the rear of the fuselage.
1A. The tips of the stab need to measure the same distance from the center of the front of the fuselage. Otherwise, when you do step 2 the wing won't be square with the fuselage.
On step 2, you would have less error if you measure the tips of the wing back the the rear of the fuselage.
02-02-2009 | 10:08 AM
#7
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RE: correcting uneven stab?
ORIGINAL: crossman
I believe that the drawing is assuming that the wing has already been set square to the fuselage.
I believe that the drawing is assuming that the wing has already been set square to the fuselage.
ken
