ENGINES....
Ok-as some of you know, I'm still researching which engines to get for my big F800. OI has recommended a couple, and I'm looking at those 2, plus a 3rd.
Some thing's I've discovered, that I didn't know before-the engine numbers; say 2214; the first number is the stator size in mm, and the second number is the shaft length, also in mm.
Now I'm no electrician-in fact, I'm banned from playing with electricity(long story-didn't end well). But-the way I understand it, the bigger stator, will provide more power.....but, it will also require more power.
So, while a 22 sized stator is fine for 10" and below props running 3S-when you move up to 11" and higher props, or 4S, you are past what the stator can deliver, power wise.
Also, there is the KV rating. From what I undestand, this is the RPM per Kilo Volt that the engine will rotate at 100%(still not sure of this). So, I have an engine that has a 22mm stator, running 3S, and 11X5 props. which means-my engines are over-propped and maxed out at 1400KV.
Ol recommended 2...one of those 2, had a 28mm stator and the other a 35mm stator. Both. were 700KV.
Now remember-we're talking going to 4S-more voltage will spin the motors faster....?
I believe Ol has the 2814-11 700KV motors...but, recommended the larger stator 3508-16 700KV. Both are out of stock everywhere.....
So, then I started thinking(always a dangerous thing). Why not stay with the 28mm stator, but go with a higher KV rating?
And I found these;
http://www.buddyrc.com/sunnysky-v2814-10-800kv-brushless-motor.html
And, they're in stock.
Keep in mind-I would prefer to run the 11X5 E-Graup props I have. I know I can go up to 12"-or higher. But, that creates issues I don't want to deal with.
So-for you engine experts out there...what to you think? Would you go with the higher KV rating and stay with the smaller stator-28mm? Or, would you go with the big Pancake motor-the 3508? Bigger stator I believe would like more electricity...but, it may be more efficient??
I realize there isn't a 1 size fits all solution to my problem. I'm at AUW near 2800 grams. I would be over 3100 if I put the retracts back on. I want to hover at 50% or less power-and, I'd like to have flight times over 10 minutes(want cake-and want to eat it).
So-what direction do you guys think I should go? Bigger stator motors...OR; "dude, you're just going to have to run 12" props anyways-just pick one".