Sailplane Builder Articles of Interest:
Carbon Spar Design, Jim Marske, February 1997, page 15
Detailed description of tensile and compression values for carbon tows and NEPTCO pultruded carbon rods
    For tows, Marske recommends 48,000 to 74,000 psi in compression
    For rods, the manufacturer claims 200,000 psi in compression
A cyclic endurance test resulted in no failures after 10,500 cycles.

Carbon Dragon note in Woodstock Builders Forum, Clint Brooks, December 1997, Page 7
Jim Garay of the A.H.S.A reports on initial Carbon Dragon  flights by Graham Betts in Australia.
Sailplane was nose heavy with 200 pound pilot.
Discovered tailplane had an Angle of Attack of 2 degrees (built parallel to boom which tapers)
Fix:
    Lowered leading edge of H. Stab 10 mm (0.4 inches)
    Moved pilot back 100 mm (3.9 inches)
Reports the sailplane now a "joy to fly".
Cost to build $3000 plus $3000 for instruments, chute and trailer (including an emergency chute).

Photo layout from Jim Mills of his Carbon Copy (cute name), December 1997, Page 15
Kevlar pod built over a foam plug.  Formers and stringer looks to be built per plans.
Shows fin in a fin jig.  Shows boom one-half skinned.  Shows tow hook built on mill. Shows hinge and hinge mold.

Photo  of Jim Mills with the parts for his Carbon Copy (cute name), October 1996, Page 7
Jim Mills standing by his wonderful exhibit of his Carbon Dragon parts at the Western SHA workshop at Tehachapi. I particularly liked the precision of the boom formers with the mounted pulleys at the offset angle.

Photo layout from Jim Mills of his Carbon Copy (cute name), November 1997, Page 17
Pod and boom showing formers and stringers looks to be built per plans.
Better photo of the boom one-half skinned.  Control cables, pulleys and formers clearly visible.

Builder note from Syd Hall regarding NEPTCO rods, October 1997, Page 5.  Claims out of production because of questions about the use of rods in spar caps ... particularly problems with drilling holes for the root fittings.
Richard Wynn mentions NEPTCO rods left in stock.  Claims out of production due to material inconsistency
 
Structural Element Design with Rod Packs by Charles Rogers and Stan Raczelowksi  regarding NEPTCO rods, August 1997, Page 15.  Information extracted from a Neptco design paper.  One example used Syncore epoxy resin filled with hollow ceramic spheres to fill voids between rods and bias plies.  10 mill glass fabric was used for bias ply.