K110 Head Speed ? - HeliFreak
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Old 07-16-2016, 05:57 PM   #1 (permalink)
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Default K110 Head Speed ?

I don't have anything to measure RPM but know some of you do. I would be interested in knowing what the K110 head speed is. It would also be interesting to see it compared to other models in the 100 size class.
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Old 07-19-2016, 08:56 AM   #2 (permalink)
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I think I have a tachometer, I'll try...
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Old 12-16-2016, 12:09 AM   #3 (permalink)
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Quote:
Originally Posted by SHYguy View Post
I think I have a tachometer, I'll try...
The suspense is killing me.
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Old 01-17-2017, 10:25 PM   #4 (permalink)
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And still with baited breath we wait. ...

Sent from my SHIELD Tablet K1 using Tapatalk
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Old 01-17-2017, 11:10 PM   #5 (permalink)
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Quote:
Originally Posted by BrokeDad View Post
I don't have anything to measure RPM but know some of you do. I would be interested in knowing what the K110 head speed is. It would also be interesting to see it compared to other models in the 100 size class.
hi,
Xk k110 (3 min 10 sec)

In this youtube sample, head speed is 5,310RPM after around 8second of taking off.
Measured main blade sounds by Audacity.
It is 177Hz .Equals 5,310RPM.
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Old 01-29-2017, 09:18 PM   #6 (permalink)
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Wow. Wonder what the k120 spins at!

Last edited by Thickfog; 02-10-2017 at 04:11 PM..
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Old 03-27-2017, 09:43 AM   #7 (permalink)
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Smile K120 rpm measured (and other small helicopters)

Hi,
as I was searching for half an hour for this information and couldn't find it I finally registered to this forum so others might be able to find it in the future (I have been reading a lot, great people!):

Quote:
Originally Posted by Thickfog View Post
Wow. Wonder what the k120 spins at!
The K120:
in fast downwoad (nose dive) flight it was 6400 rpm.
throttle curve: 90-85-80-85-90
This was measured on the audio track of a video taken (also using Audacity).

I lowered the head speed quite a bit as the power is still plenty and measured it
in a hover at 4200 rpm.
throttle curve: 84-80-76-80-84
This was measured using a DSLR which was put in the ground facing up and hovering over it,
see picture:



Using the same method for nCPx gave 3700 rpm and 130x had 3200 rpm.

Using the audio track on a K110 video I got 5300 rpm (performing a flip).
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Old 03-27-2017, 02:28 PM   #8 (permalink)
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Thanks Flo422. I have a K120 (and a half ). I hardly ever fly it though.
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