Prop doing 5000 rpm


#1

3d printed prop spinning at over 5000rpm and not desintergrating!. Means motor is running at 24000 rpm. Probably not doing this in the water under load.


#2

80100 rpm test.


#3

@mp105
Hi Mike,
in your first video I didn’t see any mark on one of the propeller blades which would allow the rev counter to recognize that one revolution is over. Whithout that (or a similar feature) the rev counter will take every blade passing by the laser spot count as a revolution and show you the threefold value of the rpm.


#4

There is a reflective sticker on one of the blades that the laser picke up as it’s rotating.


#5

I didn’t see it, sorry.


#6

Its pretty surprising eh?

I’ve run mine at 6000 rpm to help me get my rotating assembly as close to concentric & balanced as I can. Its spent a long time at that speed. I definitely suggest full face protection around it!

I actually ran one of my early props on the motor directly. Super dangerous and stupid. That was scary the entire test jig wanted to take off.


#7

Not sure how accurate it is but, as described in this link, I recorded 4,325 using a free IOS app on my 56104 500KV motor with a Neugart 5:100:


#8

I am doubtful too. Just curious. What is the display without this sticker ?


#9

Without the reflective sticker it reads 0.