Hi everyone,
I don't know the first thing about laser levels, but I thought I heard
someone mention that you could use one to measure and set the dihedral in
the wings. How do you go about doing that?
Mike Kimball
SR #044
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Laser Level Question
-
Wayne G. O'Shea
Laser Level Question
Mike, don't remember anyone posting use of a lazer level. I use a digital
smart level (mounted to a 4 foot level) as it allows you to get both wings
exactly the same, even if you were mounting the wings on a hill, by simply
comparing the wing reading to the cabin floor and doing some math. If the
cabin floor is 0.0 then the wings are of course both just set at 1.0 If
the cabin is 1.0 down to the left then you set the left wing at 0.0 and the
right at 2.0 etc! <IF> you have the room I find the best place to do the
wing mounting is on the table with the fuselage turned 90* and weighted down
to keep flat on that 0.0 table you built it on. Then each wing is pegged in
place at the fuselage and the wings adjusted up or down using basement beam
adjustable posts. Turn the adjuster heads in/out until you get both wings
exactly 1* and then do your wing struts. This is also a good time to check
the angle of incidence of each wing to see if they are the same. On the
Rebel I always leave the attach fittings undersize, until the inital wing
fitting, as it allows for some minor adjustments in incident by offset
drilling the final holes (done by putting a plug in the exising undersize
hole and putting a new pilot hole in it). The Rebel/Elite/SR don't have the
"luxury" of adjustable attach bushings, like a Cessna does, to allow rigging
the aircraft after you find out it turns left or right in flight. Mind you,
now that the SR3500 has those 3/4"od x 5/8"id steel bushings on the front
attach fitting if you found a minor rigging problem you could get someone to
make you a set of offset bushing to replace them with.
Regards,
Wayne G. O'Shea
www.irishfield.on.ca
----- Original Message -----
From: "Mike Kimball" <mkimball@gci.net>
To: <murphy-rebel@dcsol.com>
Sent: Friday, March 29, 2002 10:01 PM
Subject: Laser Level Question
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smart level (mounted to a 4 foot level) as it allows you to get both wings
exactly the same, even if you were mounting the wings on a hill, by simply
comparing the wing reading to the cabin floor and doing some math. If the
cabin floor is 0.0 then the wings are of course both just set at 1.0 If
the cabin is 1.0 down to the left then you set the left wing at 0.0 and the
right at 2.0 etc! <IF> you have the room I find the best place to do the
wing mounting is on the table with the fuselage turned 90* and weighted down
to keep flat on that 0.0 table you built it on. Then each wing is pegged in
place at the fuselage and the wings adjusted up or down using basement beam
adjustable posts. Turn the adjuster heads in/out until you get both wings
exactly 1* and then do your wing struts. This is also a good time to check
the angle of incidence of each wing to see if they are the same. On the
Rebel I always leave the attach fittings undersize, until the inital wing
fitting, as it allows for some minor adjustments in incident by offset
drilling the final holes (done by putting a plug in the exising undersize
hole and putting a new pilot hole in it). The Rebel/Elite/SR don't have the
"luxury" of adjustable attach bushings, like a Cessna does, to allow rigging
the aircraft after you find out it turns left or right in flight. Mind you,
now that the SR3500 has those 3/4"od x 5/8"id steel bushings on the front
attach fitting if you found a minor rigging problem you could get someone to
make you a set of offset bushing to replace them with.
Regards,
Wayne G. O'Shea
www.irishfield.on.ca
----- Original Message -----
From: "Mike Kimball" <mkimball@gci.net>
To: <murphy-rebel@dcsol.com>
Sent: Friday, March 29, 2002 10:01 PM
Subject: Laser Level Question
**Hi everyone,
I don't know the first thing about laser levels, but I thought I heard
someone mention that you could use one to measure and set the dihedral in
the wings. How do you go about doing that?
Mike Kimball
SR #044
** To unsubscribe, send e-mail to list-server@dcsol.com with
**** UNSUBSCRIBE MURPHY-REBEL in the message body on a line by itself
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-
Legeorgen
Laser Level Question
Mike,
I have not used a laser level but I believe the concept is the same as a transit. Find or make a flat and level surface to set the level and point the laser at each wing tip. Make sure the plane is level too.
A cheap way to measure your dihedral is to use a small vinyl tube filled with water and food coloring (makes it easier to see the water in the tube). Run the tube to both wing tips. The water will be level at both ends. Make sure the plane is level again.
Bruce G 357R
I have not used a laser level but I believe the concept is the same as a transit. Find or make a flat and level surface to set the level and point the laser at each wing tip. Make sure the plane is level too.
A cheap way to measure your dihedral is to use a small vinyl tube filled with water and food coloring (makes it easier to see the water in the tube). Run the tube to both wing tips. The water will be level at both ends. Make sure the plane is level again.
Bruce G 357R
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Al & Deb Paxhia
Laser Level Question
Mike,
Borrow a "Smart Level" digital level if you can. It reads in .1 degree
increments. I made a flat spot on the top of the wing by putting a pair
washers over a couple of rivets on the wing along the spar. I put my 4'
level on the washers and the digital level on the 4' level. Lifted the tip
until I got what I wanted.
Al
----- Original Message -----
From: "Mike Kimball" <mkimball@gci.net>
To: <murphy-rebel@dcsol.com>
Sent: Friday, March 29, 2002 7:01 PM
Subject: Laser Level Question
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Borrow a "Smart Level" digital level if you can. It reads in .1 degree
increments. I made a flat spot on the top of the wing by putting a pair
washers over a couple of rivets on the wing along the spar. I put my 4'
level on the washers and the digital level on the 4' level. Lifted the tip
until I got what I wanted.
Al
----- Original Message -----
From: "Mike Kimball" <mkimball@gci.net>
To: <murphy-rebel@dcsol.com>
Sent: Friday, March 29, 2002 7:01 PM
Subject: Laser Level Question
**Hi everyone,
I don't know the first thing about laser levels, but I thought I heard
someone mention that you could use one to measure and set the dihedral in
the wings. How do you go about doing that?
Mike Kimball
SR #044
** To unsubscribe, send e-mail to list-server@dcsol.com with
**** UNSUBSCRIBE MURPHY-REBEL in the message body on a line by itself
**** Archives located at http://rebel:builder@www.dcsol.com:81/default.htm
**** To contact the list admin, e-mail mike.davis@dcsol.com
-----------------------------------------------------------------
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