Hello all,
TRICUBIC STUDIOS uses for Combat Helo the Leadwerks Engine :
http://www.leadwerks.com/werkspace/page/Products/le2
and later, for next projects, the GROME3 engine :
http://www.quadsoftware.com/index.php?m=section&sec=product&subsec=editor
I saw a message from JediMaster about Jet Thunder,
ThunderWorks have got a proprietary 3D engine, confirmed by Dante here :
http://combatace.com/topic/46249-news-for-august-2009/page__p__423934#entry423934
My 2 cents of €.
I beg your pardon for my poor english,
all the best for this great project.