My goal was trying to make a very simple solar RC plane. This particular plane is the third iteration which is able to fly by just using solar energy during a sunny day. This video of flying it:
This is an inexpensive plane which can be made within 60 USD. (obviously excluding transmitter and receiver)
It has a flying weight of 250 grams, with a maximum thrust around 70 grams. To power 2 coreless motors 8 SunPower c60 type solar cells are used each gives 0.5V and maximum 5.5Amp (i measured up to 4.5 amp). Here the control surfaces are controlled by battery power to avoid any crash due to sudden power loss and the motor has just ON-OFF control.
Connecting all solar cells in series:
Switch to turn on and of the motor:
An airfoil having flat top and tail section copied from tiny trainer:
Controlling both aileron and rudder using a single servo motor:
Here is a video of overall details: