 Also proposed was a heat shield forming an ablative insulation made from carbon fibre or fiberglass in a honeycomb matrix, later used on NASA's Mercury and Gemini programs.The engine was to be the Iroquois Mk.3, which Orenda estimated would provide 40,000 lbs of wet thrust (with afterburner).Images of the design show revised engine intakes projecting out from the fuselage to swallow the supersonic shock wave to reduce drag and increase thrust.