Hey guys, I have had a niggle at my brain since Oscar's review of the X1 whoop with 7mm motors.

So as I understand it, motors wound to give a lower KV produce more torque, the more torque driving the prop the less it slows down from increased resistance yeah? i.e when descending quickly the air is trying to force the props to turn in the opposite direction, the more torque the motors provide, the less the props are effected by this and the quicker you should be able to halt the descent?

Now I thought that props would have to be designed for higher torque motors and given a higher AOA to make use of the additional torque and lack of RPM, but as Oscar said that the props on the X1 look exactly the same as the E010/H36 etc. I am a bit confused that the upgraded motors for the tinywhoop are all a higher kv?

So I was thinking about brushless micro's and thought that if a frame supports 110x motors surely one would be better off getting 1106 motors rather than 1103, but then I saw that there are Realacc 6000kv 1106 and Racerstar 3800kv 1106... That is quite a difference in RPM, would 3800kv be fast enough for a 1935 prop?

Thanks for any help.

In my opinion 3800 kv is way too low for this prop. Iam running 2035 quadblades on rs1103 10000kv and it flies well. Maybe 8000kv could be a better option for efficiency.

Hope that gives you some perspective:

Ok thanks Konrad, so you kinda confirmed my suspicion that, for 1106 motors to perform well, they seem to require props that would just be too big for a proper micro...

TBH though, I am still confused about how the 7mm motors perform so much better with the same prop on the X1, the E010s has 16000kv 0615 motors and the x1 has 0715 or 0716 14000kv.

I know that kv ratings are taken under 'no load' conditions, when a prop is attached what effect does this have on 'actual' RPM would the 6mm and 7mm motors swing identical props at 'the same' RPM just with more or less torque?

Sorry if this is another of my threads that is just waiting for someone to say "Open your eyes, Tom!"

Open your eyes, Tom! ;p

7mm motor has way more torque to drive whatever prop you are planning to use, but keep in mind that in micro scale, adding even 5g of thrust per motor may make a difference.

Generally, those 1103 10000kv motors require a very light prop. I tried:
- 3035/2s, motors were overheating
- 2035/3s, motors were overheating
- 2035 quadblade/2s - good combo but seems to be "on the edge" of the motor performance - quad feels a bit overpropped
- 2035 biblade (quad with broken blades)/2s - works great!
- 65mm eachine - working good but are very brittle
- 55mm eachine - works great!
- eachine "whoop" props - way too small, need higher kv

I have some other props to test also, including cut-down 3035, drilled hubsans and ladybird ones.

If you are going to get those motors and have some brushed props laying around, grab a 1,45mm drill bit, that comes in handy if you want to use that pile

For small builds with small props you want really high KV motors

i love high KV, way more responsive