one blade scanned on A4 size scanner

Dear

Some One who does not know anything about propeller
But he has a Scanner. Then he put his small propeller
on scanner machine scanned the one blade of propeller.
A reference point of scanned image is Propeller diametre.
Can We find its pitch and Dar.
I mean two dimensions Jpeg how to convert three dimensions to calculate propeller pitch and Dar.

Sincerely Yours
Oktay Çemberci

 

Pitch is easy.

you can rotate it in the air and by eye try to find out how far the proppeler would travle on one rotation.

A more acurate method would be to take some basic meshurement on the blade. Use from center to a pont on the blade where you can meshure both the width of the blade and the depth and then calculate. Find the circumference at the point you did this meshurement and just devide it on the with of the blade and multiply it with the depth and you have m/rotation.



Hey! I newer claimed I was a expert in autocad ok?

 

Stian, I think your picture is very clear and informative!

 

Your too kind, I hope my autocad skils where bether

 

OK, butt your spellling suckks!

 

btw, a propeller blade is twisted, the angle decreases outwards from the center,
I don't think you can do that in plain AutoCAD, but in Rhino....

 

Some schools provided good coverage for people with dyselecsia and mine did not and I don't care mutch about it annymore, even our late King Olav had it.

I find your lack of faith disturbing



You can do annything in autocad, but some things are harder than others. If you want to draw complex shapes you end up drawing a wireframe witch I don't master.

 

OK, I miss the Loft command...