Brian,
Was going to reply to your thread when you posted it but decided to put my Mangonel on my recently constructed rigging stand. Haven't checked the rigging for about 45 flights. In summary my results are
Model wing area- 700 sq ins each, model weight with 4950 mAhrs Dualsky pack 4790 gms. Set up datum is the hatch combing. Down thrust 0.9 deg, right thrust 3.4 deg. CoG at 29% MAC of top wing- no stagger used.Wings -section NACA 64-008A honeycombed foam/balsa/Monocote. The all moving stab trims at +1.2 deg. Top wing +0.25deg, bottom wing +0.42deg measured at the tips. Wings were originally set at 0.25deg so looks like there is a twist in the bottom wing but it is symmetrical. Only two mixes used
Throttle to down elevator 3% at low throttle to straighten the down lines and 4% rudder to elevator to correct proverse roll in knife edge. We didn't quite get the dihedral correct. Top wing has 0.7 deg anhedral ( flat across the bottom) and lower wing has zero dihedral. Motor Plettenberg 30-10 Advance with Spin 99 ESC. Falcon 21.5*13 prop. We are very happy with the way it is flying. Design by David McFarlane who flew in the Aussie team in the World Champs in Ireland. Uses a modified monoplane molded fuse( Arbalest ) also designed by David
. Have attached some pics of it in the rigging stand with my home built incidence meter. Good luck with yours- wings look very inpressive. Bill