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Oct 10, 2020, 05:45 PM
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18650 Mini Stick

18650 Mini Stick (7 min 46 sec)

Woke up @ 6AM , to go fly the 18650 battery powered Micro mini stick .
Goal was to test the 7035 prop ..

And it was a huge fail , the 6040E prop was much better .

Problem = Going from the 6040 to the 7035 there was only a few hundred RPM difference .
Sure I got more thrust with the larger DIA prop = BUTT !!!!

RPM + Propeller pitch = SPEED ..
So for the RPM range , the 6040 prop with slightly more pitch gave more speed in flight while the larger 7035 prop may have given more static thrust .
Thrust in this case is not the end all be all due to the low RPM the motor is turning 1s .
What is needed is more propeller pitch .

So broke the prop if you did not watch the video ..
Flying speed was sketchy .
Thankfully the ground was soft and muddy so the only thing to break was the prop .

I will try a 5x5.5 and see what happens .. ( Since I have one )

Update :

5x5.5 Prop = No thrust to speak off ! I lifted the nose up @ full throttle and let go the Mini stick .. It dropped like a stone ..

Rummage around the prop box ..

6x4.5 prop .. = Perhaps a little more hang time than the 6x4E - RPM is down to 5400 rpm ...

I think the Motor KV is too low , anyone contemplating 1s might want 6000KV +
This one is 3800kv .. Multiply by Voltage ( 4 ) = Hmmmm , and then maybe / divide by 50% ( ? )
I think I may need to move on and simply JAM a 2s battery in this model .
And call the 18650 experiment a D+ ( Need more Kv )
One more prop to try ( 6x4.5 )
Last edited by old4570; Oct 10, 2020 at 08:41 PM.
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