cvjetkovic ca-65 skyfly- plywood spar?

[patrick mitchel]

A friend was given a reference to the use of plywood as a spar in the ca-65
skyfly. Was unaware of the use of ply as a spar in aircraft. Perhaps a
laminated spar with all the veneers running the same direction, but with
half running parallel to the chord????? Anyone have knowledge of said
homebuilt? Thanks Pat

[Hatz Lyman C]

I am not familiar with the ca-65. It is common to use plywood in I-beam and
Box type spar construction.

Lyman

[Cy Galley]

Use plies at a 45°


"patrick mitchel" > wrote in message
...
> A friend was given a reference to the use of plywood as a spar in the
ca-65
> skyfly. Was unaware of the use of ply as a spar in aircraft. Perhaps a
> laminated spar with all the veneers running the same direction, but with
> half running parallel to the chord????? Anyone have knowledge of said
> homebuilt? Thanks Pat
>
>

[Dan Thomas]

"patrick mitchel" > wrote in message >...
> A friend was given a reference to the use of plywood as a spar in the ca-65
> skyfly. Was unaware of the use of ply as a spar in aircraft. Perhaps a
> laminated spar with all the veneers running the same direction, but with
> half running parallel to the chord????? Anyone have knowledge of said
> homebuilt? Thanks Pat

Probably they're referring to use of plywood in the spar structure.
Many wooden airplanes use built-up spars in which lumber is used to
carry the tension and compression loads, and plywood is used to keep
the lumber in its proper place. My Jodel has a box-type spar making
extensive use of plywood, with the face veneers running in various
directions to take maximum advantage of the ply's strength. That spar
carries all the wings loads: lift, drag and torsion. It's the only
spar in the wing, and is the single most complicated part in the
airplane. And the strongest.

Dan