cool electric generating ideas for model plane?

i got a few ideas for on-board power generating and i would need help setting up resistors and that
crap over there.

1) solar powered engine starter.
the nitro engines run using a glow plug which is lit by a 1.2 volt, 1700mA glow stick. you stick it on, flip the propeller, the engine starts, then you remove the glow stick and take-off.
now, what if a solar panel used a few resistors to get this same power but constantly going into the glow plug? you would just have to spin the prop to get it started again. the engine would never stall.

2) solar powered flight battery charger.
the battery (that powers servos and receiver) is 4.8 volt (DC) and 600 mAh. the battery CAN be charged while in use. i'm not good with resistors and i don't know how i could make the panel give out no more than 4.8 volts and 600 mAh. it would be cool because i would never have to charge my airplane. just my controller.

3) solar powered rc glider.
rc glider with solar panels powering an electric motor

4) wind powered battery charger
same as the solar powered charger but with an electric motor with a prop being spun by wind to generate power

1. That takes a lot of solar panel, a lot of weight, just in case the engine stalls? doesn't seem worth it. 1.2 x 1.7 = 2 watts. That will be about 50 square inches, or 7" x 7". Now you could use a smaller panel and a large capacitor to store some of the power, but that gets complicated also.

2. same problem, carry the extra weight when you can charge the battery before the flight.

3. This is more like it. Needs a lot of design work, and of course there is the problem of when the sun ducks behind a cloud.

4. Doesn't work. the extra drag from the second prop will be more than the power recovered. Perpetual motion machines are not possible.

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