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Twin Jet w/ Trim Canards

171 karock  8.8 years ago

Got tired of fighting the constant nose-down pitching in most airplanes, so I designed something that can be trimmed for different flight regimes and performs well at both low and high speeds. Inspired by modern fighter designs.

Trim nose up (VTOL slider down) about 1.5 notches for max lift resulting in 150 mph takeoffs and approaches.
Trim nose up 1 notch with about 10% throttle for level flight at around 300 mph.
Full throttle with half notch nose down trim for straight and level 1000+ mph cruising.
Full throttle with nearly full notch nose down trim for level inverted flight.

Airplane is balanced well for 150-160 mph approach with smooth rear wheel landings at 135-145 mph touchdown speed with full back elevator and 1.5 notches nose up trim. Also comes equipped with air brakes to easily bleed off excess airspeed when you need to "go down and slow down." Floated forever without them. Can balance on main landing gear with nose in the air at low power input right around 130 mph if you're careful. Bridge landings also work well. Couldn't quite get it to stop on the carrier. Best was nose wheel hanging off the end.

FWIW: full nose up trim seems to stall the canard resulting in less lift than 1-1.5 notches.

General Characteristics

  • Created On Mac
  • Wingspan 39.1ft (11.9m)
  • Length 40.9ft (12.5m)
  • Height 16.1ft (4.9m)
  • Empty Weight 11,138lbs (5,052kg)
  • Loaded Weight 17,361lbs (7,875kg)

Performance

  • Power/Weight Ratio 3.883
  • Wing Loading 45.7lbs/ft2 (223.3kg/m2)
  • Wing Area 379.6ft2 (35.3m2)
  • Drag Points 2816

Parts

  • Number of Parts 43
  • Control Surfaces 8
  • Performance Cost 358