Testing resumed today with the Gear Best 2212/5T 2700 Kv motor in this beautiful new Mig-35B that appeared in various stages of construction in our newly written Mig-35B build instructions.
- 6x3 EMP prop - top speed 83 mph;
- 6x4 APC prop - top speed 85 mph.
As I was doing the speed runs, going from about 50-60% throttle to full throttle quickly, the 6x3 EMP prop still does provide the better "hole shot" acceleration, not a massive difference, but noticeable.
Again, the temperature was fairly cool, 6C/43F, so heat build up was not a problem with either prop, as temperatures begin to warm up more in the coming months, I will continue to test and monitor to see if heat build up with the 6x4 APC prop could become a problem.
In my opinion, these numbers prove out why it is important to validate my bench testing with field testing as it is only under flight conditions that the true performance and characteristics come out I think. The bench testing is certainly very important to ensure the components are matched properly and that the motor is not under or over propped so as not to waste potential power or push the motor too far beyond it's design capabilities. When you look at the thrust numbers at both 50% and 100% throttle on the bench, one would think it would be faster all round with the 6x3 EMP prop, but it isn't and actually doesn't feel like it is.
I know this is not the most scientific way of describing it, but I like the "feel" of how the airplane flies and handles better with the 6x4 APC prop. The speed and momentum of the airplane just seems to be better in that 50-60% throttle range where I spend more than 80% of the time while I am flying. So I would say thus far the 6x4 APC prop is my favourite with this motor for that reason, fingers crossed that as the temperatures warm up heat build up in the motor won't be a problem.
I'm certainly not trying to sway people to use the 6x4 APC prop on this motor, rather suggest having a couple of different props to try as you never know what flight characteristics you will get at the field until you try it out. Sometimes, just a change in prop will help an airplane better suit your flying preferences.
So more testing to continue before I list this motor on our parts list. I like to have at least 100 flights on a component with good consistent results before I recommend using it. Even with the very inexpensive price, I think we all like to have components that have a certain level of durability.