George Lendich wrote:

Chris Cosman
Have been looking at your Mark 11 and wondering about your design and

using

carbon throughout.

Have you seen the carbon rod material (US manufacture) used in spar
construction for glider spars,
puch rods etc - I believe can be used in composite tri landing gear

(main

gear). It is exceptionally strong and inexpensive, I will dig up the

Web

page if you don't already have it.

I have seen/manufactured carbon rod/tube but probably not the

manufacturer

you are referring to.  We molded the landing gear for the Cosman I and
intend to do the same  for this one.  I would be interested in the

reviewing

the site for control linkage materials if you will forward the link.

What sort of lay-up do you do for the wing skins and fuselage, I

assume one

of Uni and one of Bid. but I wonder about the weight of those cloths

?

George (down under)

Without looking at my notes; I believe the wing skins are 2 layers of

19oz.

cloth on the bias, foam core, and another layer of 19oz. cloth, wet

layup,

and vacuum bagged.

Chris
microcosman.com

Robert Barnard wrote:

The carbon rod material you mentioned, are you talking about pulltruded?  I
understand this form of carbon composite is very strong and stiff since the
fibers are stressed while the matrix (thermalset) sets up.

 
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