I have been doing quite a bit of analysis for what would be the best tiger motor model/propeller combination for improving my heavy lift octocopter.
I am sharing here an excel analysis sheet I made for that, as it may be useful to share this with the community. The objective is to find the combination of tiger motor model/propeller size (propellers are assumed to be APC slow fly, I think they are the best ratio price/quality wise) to :
-to lift a 10 pounds octocopter
-Throttle close to 50% at hover point
-Have some amps/watt reserves on the motors and ESCs when throttle 100%
Fixed constraints for me : ESC 40 amps, Battery weight is asssumed to be 1130g, All Up weight including battery is 4850 g, propellers must be APC slow fly.
Here is the result of my the analysis in the excel sheet below (the file is also provided in annex). The calculation were made with the online eCalc tool for multicopters:
Conclusion : I will get the tiger motor model 3510 360Kv, with 6S battery and 14x4.7 propellers. It provides me all I wish for:
-good flight time duration : 18 minutes (for a heavy beast!)
-50% throttle at hover point
-All amps and wattage are well below the limits of the motors and ESCs.
Hope this would help others who are looking what would be best motor/prop combinations for their setup,
Accesorily and as a consequence, I must sell my current 3110-17 (700Kv) tiger motors to help me finance the acquisition of this other model (see picture above). They are like new (were purchased recently in june 2013) and they flew a total time of less than 50 minutes of use. I sell them in their original boxes with the original 6 mm tiger motor propeller mounts plus their carbon prop mounts. If interested, pm me. I am thinking for a price of 45 US$ each (price of new is around 64 US$ each).