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Burt’s Last RAF/Scaled Airplane Project Model 367 BiPod A gas/electric hybrid roadable airplane

Burt’s Last RAF/Scaled Airplane Project Model 367 BiPod A gas/electric hybrid roadable airplane. Program Justification IR & D hybrid electric propulsion technology Evaluate air and ground safety of new configuration Shop Training Demonstrate ‘old school’ to new engineers

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Burt’s Last RAF/Scaled Airplane Project Model 367 BiPod A gas/electric hybrid roadable airplane

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  1. Burt’s Last RAF/Scaled Airplane Project Model 367 BiPod A gas/electric hybrid roadable airplane

  2. Program Justification • IR & D hybrid electric propulsion technology • Evaluate air and ground safety of new configuration • Shop Training • Demonstrate ‘old school’ to new engineers • Increase employee interface with Burt, pre-retirement • Goals • Evaluate feasibility of hybrid system • Investigate road-ability of a real airplane • Schedule • Build and fly in 4 months • Program Name • BLAST, IRAD, D-Top, TRAINING and BiPod

  3. Aircraft Performance: Takeoff/landing < 400 ft (props and wheels for acceleration, and using aggressive 4-wheel brakes for landing decel). Range (18 gal car gas) 530 miles at 197 mph/12,000 ft. Range (18 gal) 760 miles at 100 mph/8,000 ft (42 mpg). Electric-only - Takeoff and two patterns to 600 ft agl (44 lb Li-Ph batteries) Design Goals: Model 367 BiPod A plug-in-Hybrid-Electric car/airplane Fits in a single-car garage (8 x 18.5 ft) Can operate from any roads without side obstacles. Takeoff/landing requires only a 800-ft dirt road. Car Performance: Urban range (electric only, with 2.4 Kw-hr Li-Ph batteries) = 35 miles. Freeway Range (18 gal car gas) 820 miles at 65 mph (46 mpg).

  4. Model 367 BiPOD flying car Gross weight = 1430 lb Span = 31.8 ft AR = 12.5 Fuel - 18-gallons car gas + a 1.2 Kw-hr Li-Ph battery pack in each nose. Four 15kw motors for propellers. Two 15kw motors for aft wheels. Complete left-right redundancy for propulsion systems (IC engine, generator, motors/props, battery pack, drive wheel/motor and fuel). Electric power generation - 78kw (39 per side) at 12,000 ft; liquid-cooled 4-stroke, 4 valves/cyl, fuel-injected (two COTS-motorcycle engines). Pilot flies from the right cockpit using a side-stick for pitch/roll, rudder pedals with brakes for brake steering. Two throttle quadrants; one for the 4 props, another for the main wheels for takeoff and rotation boost. The wheel throttles are also used for taxi with props stopped. Differential wheel torque assists brakes for steering. M367-4 Pg 3 of 4

  5. Model 367 BiPod showing packaging for car mode. Wings stow between pods, under wing/tail. Center wing flap raises to provide down-load. Vertical fin tops are moved to the nose, providing aerodynamic down-load on nose wheels. Tie-bar (stowed in baggage area for flying) ties the nose wheels together for positive, car-mode 2-wheel steering. Conversion, Car-to-Airplane or Airplane-to-Car - requires one person and 10 minutes work. Driver drives in the left pod using steering wheel, throttle quadrant (with reverse) and a brake pedal. Car passenger rides in the right pod. Wing LE is hollow allowing communication and swapping lunch/etc. Two long baggage areas - two sets of golf clubs (or skis) and four soft suitcases. M367-4 Pg 4 of 4

  6. Current Configuration, three modes

  7. Current Configuration Airplane Mode

  8. Current Configuration Car Mode

  9. Current Configuration Road Trip Mode

  10. Back to pencils and plastic curves

  11. Back to pencils and plastic curves

  12. Prototype Fabrication

  13. Yep, a Steering Wheel Left cockpit Pedals, and Side-stick Right cockpit

  14. Shake hands, through the wing! Steering Tie-bar Used only for driving

  15. Wing handling to convert modes Yep, a Wheelbarrow

  16. Battery Module Voltage: 80 Volts (nominal) Current: 70 Amps Continuous 120 Amps Peak Capacity: 2.3 Amp Hours Power: 184 Watt Hours Life: >1,000 Cycles 8 Modules = 1.47 KWh Cooling Air Inlet Status LED Connector Power Out Enable Charge Input Serial Port CAN Bus Length: 363mm – 14.3” Width: 77mm – 3.0” Height: 72mm – 2.8” Mass: 2.4Kg – 5.3Lbs

  17. Battery Module Module Controller Cell Voltage Cell Current Cell Temperature Available Power Charger Cell Balancer Communication Safety Cut Out 24 Lithium Ion Phosphate Cells Solid State Safety Switch

  18. Battery Modules 16 Battery Modules, 2 Spare Modules and System Wiring

  19. Cell Torture Testing Cell Fail Safe Design 10X Over Voltage = NO Pyrotechnics

  20. 15KW (20Hp), 3Kg (6.6Lb) Brushless Motor

  21. Drive tests

  22. Phase 1 Flight Tests – On wheel power only

  23. Nice Day over the Rockies

  24. Nice Day at the beach

  25. Questions?

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