“Name that Tune!” in 30 Watts!

“Sedate flying from a hand launch requires 35 watts per pound(W/Lb).”

2.4 meter wing

0.8m from centerline x 9g servo = 7.2 meter grams

0.8m / 2 from centerline wiring for servo! x 9g???

10.8 meter grams

0.15m from centerline x 2 x 25g motor = 3.75 meter grams (say, 30 cm between motors)

= 29% of

You can't change the design of the printed wing, but you can replace the servos with two motors / propellers, closer to the centerline of the wing.

Two pusher propellers provide thrust: half throttle for straight and level, full throttle for climb.

Bank left by reducing power on one motor and increasing power on the other motor.

Max Power: 30W 25g

HC2208-1260 Kv = 1260, Rm = .450, Io = 0.50,

Efficient Operating Current = 1-5.0A, 6.5A Max 15 seconds

6 x 4 propeller 3 cells @ 3 volt

9 V x 3.5V = 31.5 Watts

HC2208 Series Motor

HC2208-1260

see graph of Current vs. Voltage with 6 x 4 Propeller

HC2208-xxxx.pdf

Doug

“Sedate flying from a hand launch requires 35 watts per pound(W/Lb).”

2.4 meter wing

**Moment of Inertia**0.8m from centerline x 9g servo = 7.2 meter grams

0.8m / 2 from centerline wiring for servo! x 9g???

__= 3.6 meter grams__10.8 meter grams

0.15m from centerline x 2 x 25g motor = 3.75 meter grams (say, 30 cm between motors)

= 29% of

**Moment of Inertia!**You can't change the design of the printed wing, but you can replace the servos with two motors / propellers, closer to the centerline of the wing.

Two pusher propellers provide thrust: half throttle for straight and level, full throttle for climb.

Bank left by reducing power on one motor and increasing power on the other motor.

Max Power: 30W 25g

HC2208-1260 Kv = 1260, Rm = .450, Io = 0.50,

Efficient Operating Current = 1-5.0A, 6.5A Max 15 seconds

6 x 4 propeller 3 cells @ 3 volt

9 V x 3.5V = 31.5 Watts

HC2208 Series Motor

HC2208-1260

see graph of Current vs. Voltage with 6 x 4 Propeller

HC2208-xxxx.pdf

Doug

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