Im in the process of building a octo-copter for lifting a heavy payload.
Im looking to use the Turnigy G25 motors.
It says on the HK site that I should use 14x7 props.
Should I? Or should I use the 12x45 from DIYdrones?
The specs for the G25 are:
Spec.
Battery: 3~4 Cell /11.1~14.8V
RPM: 870kv
Max current: 32A
No load current: 10V/2.4A
Current capacity: 44A/15sec
Internal resistance: 0.03 ohm
Weight: 193g (not including connectors)
Diameter of shaft: 5mm
Dimensions: 78x35mm
Weight: 193g (not including connectors)
Diameter of shaft: 5mm
Dimensions: 78x35mm
Required;
50A ESC
3S~4S Li-Po / 10 ~ 14-cell Ni-MH/Ni-Cd
11x8 ~ 14x7 prop
Suitable for sport and scale airplanes weighing 3 to 5.5 pounds (1.4–2.5kg).
3S~4S Li-Po / 10 ~ 14-cell Ni-MH/Ni-Cd
11x8 ~ 14x7 prop
Suitable for sport and scale airplanes weighing 3 to 5.5 pounds (1.4–2.5kg).
Replies
This motor is to heavy! My suggestion is to try another motor around 120/130 g, with 12x4.7 or 12x3.8 props.
Look at my config if you want:
http://www.diydrones.com/forum/topics/arducopter-heavy-x-octo-fw-2-...
One hour and the video is on my youtube channel.
A recent test of the G25 on 3S 5000mAh Turnigy pack:
Gareth,
how many cell battery are you going to run them on?
recommended 14x7 is for 3S lipo and the 11x8 is for 4S lipo
You use a larger prop at lower voltage because of the lower rpm and smaller prop at higher voltage because of faster rpm to keep the load on the motor nearly the same.
In this thread we've been talking about props http://diydrones.com/forum/topics/help-crash-report-with-log-and-vi...
The 12x45 is a slow flyer prop and may not be designed for the rpm range that a octo-copter uses, for safety factor you might want to look at a heavier bladed prop. 12x7 would be similar on this motor to 11x8 recommended. Those with more experience can give us more info.