Hi Jeremy,

the total weight of my DF is slightly less than 600g. It's not the problem for the Todd's Models' Prop. For my configuration, the DF can lift up at about 50 - 60% PWM duty cycle.

My configuration is as below:

Prop: EPP1045
Motor: GWS 350C Ratio 5.33:1
Microcontroller: 2 pcs of PIC16F876A
MOSFET: IRFZ44N
Gyro: NEC-TOKIN CG-L43
Battery: 1500mAH Li-Po Battery

ADI, I have a question. May I know what is the maximum voltage for the motor i'm using? Currently, I'm using the 11.1v Li-Po battery and I limit the PWM duty cycle to about 75% maximum (75% x 11.1v = 8.33v). Will it damage the motor? Or I should change the battery to 7.4v? My PWM frequency is 20KHz. At first, I'm using 1KHz for my PWM frequency. The motor will run faster but hotter and noisier. So I change the freq to 20KHz. Now the motor is not so hot, but the MOSFET is hot. I have been searching around the net for the optimum PWM frequency for the motor. But I got no luck with it. some say around 1KHz, some say must more than 10KHz, and even some are using >100KHz (Intellicopter)...