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

Burt’s Last RAF/Scaled Airplane ProjectModel 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 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

Design Goals:Model 367 BiPod

A plug-in-Hybrid-Electric car/airplane

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)

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).

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.

Model 367 BiPOD flying carGross weight = 1430 lb Span = 31.8 ft AR = 12.5Fuel - 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).

M367-4 Pg 3 of 4

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.

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

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.

Current Configuration, three modes

Current ConfigurationAirplane Mode

Current ConfigurationCar Mode

Current ConfigurationRoad Trip Mode

Back to pencils and plastic curves

Back to pencils and plastic curves

Prototype Fabrication

Yep, a Steering WheelLeft cockpit

Pedals, and Side-stickRight cockpit

Shake hands, through the wing!

Steering Tie-barUsed only for driving

Wing handling to convert modesYep, a Wheelbarrow

Battery Module

Cooling Air Inlet

ConnectorPower Out

EnableCharge Input

Serial PortCAN Bus

Status LED

Voltage: 80 Volts (nominal) Current: 70 Amps Continuous 120 Amps PeakCapacity: 2.3 Amp Hours Power: 184 Watt Hours Life: >1,000 Cycles

Length: 363mm – 14.3” Width: 77mm – 3.0” Height: 72mm – 2.8” Mass: 2.4Kg – 5.3Lbs

8 Modules = 1.47 KWh

Battery Module

Module ControllerCell VoltageCell Current

Cell TemperatureAvailable Power

ChargerCell Balancer

CommunicationSafety Cut Out

Solid StateSafety Switch

24 Lithium Ion Phosphate Cells

Battery Modules

16 Battery Modules, 2 Spare Modules and System Wiring

Cell Torture Testing

Fail Safe Design10X Over Voltage = NO Pyrotechnics

Cell

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

Drive tests

Phase 1 Flight Tests – On wheel power only

Nice Day over the Rockies

Nice Day at the beach

Questions?