Strut angles

[Mark Bowden]

Re: Strut angles

The aircraft datum is the leading edge of the wing.

Measure your feature like you were going to do a weight & balance.

Chock the wheels.

Raise tail to level the aircraft, horizontal stab is level with a carpenter's bubble level running fore to aft. Then level the wings by adjusting air pressure in tires. Wing level is measured on the frame tube at the top of the seat back.

Tape a plumb bob string on top of wing skin and let hang down in front of where you want to measure (at fuselage attach point and outboard strut attach point). Now you have a common reference point for all features of interest.

Close the doors so drafts don't move the plumb bob around.

Mark

Re: Strut angles

I think that you will find it to be about 15" aft of the spar.

Re: Strut angles

Measure parallel to the floor from some known datum referenced location like the instrument panel, front spar attach...

[jstall]

Re: Strut angles

Buy a set from Univair and don't worry about it.

My opinion is that it's a self inflicted wound by AA.

My guess is that you won't find two airplanes that need the 8 degree angle.

Putting hard hat on now.

Sure could be as far as I can tell my left front strut is about 4.5 degrees and the right
one is 4.0

The distance from leading edge to spar is 9 inches, does anyone know the distance
the strut attach point on the lower fuselage distance back from datum or prop??

JS

Re: Strut angles

Buy a set from Univair and don't worry about it.

My opinion is that it's a self inflicted wound by AA.

My guess is that you won't find two airplanes that need the 8 degree angle.

Putting hard hat on now.

[jstall]

Fellow Crafters, I'm sure you have heard about the infamous "STRUT ANGLE" where the struts angle back from their attach point to the Fuselage attach point. There has been much discussed in the past about this, and Alaska Airframes even went so far as to post procedures for measuring this angle, as apparently there are differences out there between aircraft examples.

My question then is: Have we come to any general accepted value for this angle, or are they just a varied as the aircraft they represent.

My angles are Right wing 4.0 degrees Left wing 4.4 degrees. I would be interested to hear what other Crafters have found. I'm taking the front strut not rear.

J Stallings
Taylorcrafter
Alva, OK