Turnigy packs C rating?

[Andy from Sandy]

MrMels headspeed calculator is good in that it shows what the lowest headspeed is likely to be when the pack voltage falls during the flight.

MrMel headspeed calculator v3

[stanley1]

That calculator has proven to be very accurate when ive used it

[cjcj1949]

I can see now the level that you are talking about. Looking at the logs might help you, but they might not give the information you want. Just putting in a given amount of volts and amps will give you the power in, but not the power out. In fact your possible problem may not be power related at all but vertical force related, if that is what you mean by grunt, or vertical acceleration. You could measure the vertical force by strapping down the heli to the ground and seeing what mass it can lift. Solving a problem needs to start by defining exactly what the problem is. Electric motors use the magnetic material to increase the force produced by the current going through the windings. This is called permeabilty and is not constant but varies with current. A particular motor will have a set of curves showing how output varies with input and optimizing this could be easy or critical depending on how close to the limit you are working. There are lots of other factors like frequency and timing.

After all that you then need to determine if the individual modules are working correctly or not.

[cjcj1949]

Perhaps I'm overcomplicating it. If you want more punch you have to shift more air with the rotor. That means a higher headspeed or a greater pitch. If the headspeed doesn't drop then the motor and the battery are doing their job. You will only need the extra force for a short while ( I assume) and you could maintain the headspeed for longer with heavier blades as they will store more energy. The higher headspeed will also give you more energy storage. Your headspeed is fairly low by 450 standards. I am a long way from worrying about these problems as my 450 with a £10 GiantCod motor and an old 3S pack is fast enough for me.

[stanley1]

The 450's need 2800 id say to really come alive