New article reproducing a September 1946 progress report on the Martin Orbit Project is now up on RetroMechanix.com:
This huge rocket project appears to be a refinement of Martin's earlier High Altitude Test Vehicle (HATV) proposal, an ambitious single-stage-to-orbit satellite launch vehicle designed for the U.S. Navy immediately after WW II. The accompanying gallery features 24 images, including several high resolution drawings of the vehicle. Would make for an interesting scratchbuilding project!
-Jared