Well, it might be immaterial. If you’re at 2,160 you’re right in the ballpark. But what is your collective pitch range? Why is it taking so much collective to hover it? That doesn’t seem right. I noticed from your log that you have your IM_STAB_COL’s set to about 80% collective for Stabilize hover too.
You are using Mode 1 (RC passthru) throttle. So how do you have this set up? From your log it looks like you are either turning it up with a knob, or using some sort of transmitter mix to increase throttle
In your flight video I thought I heard the RPM drop part way thru the flight, and the log shows the same thing - your throttle signal dropped from 1570 pwm (slightly over 1/2 throttle) to 1510 pwm (about dead on 1/2 throttle). I don’t know if you are using the governor or not in your ESC, but obviously it is responding to throttle.
How much negative pitch do you have set up? I see you are using IM_STAB_COL_1 set to 330, which is 33% of your collective pitch. For a scale model I would NOT use that much negative pitch in your setup. Set the H_COL_MIN to no less than -2.5 degrees so you can autorotate the model if you need to. And set that IM_STAB_COL_1 to 0.
I suspect you have a lot of negative pitch set up, and are using the high IM_STAB_COL_1 setting to get maybe zero pitch in Stabilize? This is ok if you are an aerobatic pilot. But helicopters do not require that much negative pitch otherwise. It is just going to make the heli very jumpy on the collective if you switch to any mode other than Stabilize.
As long as it appears to respond to throttle, you could change to RSC_MODE 3. And there is five throttle curve settings.
Based on what I see in your log I would set these to:
this is your ground idle, rotors turning with collective all the way down after you throw the throttle switch
This one will control how fast she ramps up as you increase collective pitch. Here we’re going to ramp up the throttle from ground idle to 50% power by the time the stick is at 25% of the way up.
This one should be light on the skids about ready to fly - we’re at 60% throttle here and the stick is half way up.
You should be in flight by now - this is 75% of the collective pitch and we are now running 70% throttle
This is your max power setting for when you heavily load the collective. It will prevent rpm loss if it is set correctly.
The above throttle curve settings are just a guess. And assuming you are not using the governor in your ESC. If you are using the governor, the throttle curve might make it increase speed in steps. I don’t know how the governor works in those ESC’s.
If you try this, I would suggest setting your IM_STAB_COL’s 2 & 3 back to 400 and 600, and IM_STAB_COL_4 to 1000, so the collective is linear. Then spool up and lift off in Stabilize. See if it acts, looks and sounds like you want. When it lifts off glance down at the collective lever and see where it is on the quadrant. If it’s at half-stick you are at the 50 point on the throttle curve. If it’s slightly above 1/2 you are between the 50 and 75 points on the throttle curve (which is where you should be).
You can use this to tune your throttle curve points to get the rpm you like, get it to ramp the way you want, etc… Once you have it to your liking, then reset the IM_STAB_COL’s 2 & 3 back to where it hovers at half-stick in Stabilize flight mode. And you should be able to leave IM_STAB_COL_1 set to 0, and IM_STAB_COL_4 set to 1000.
Those IM_STAB_COL settings are great for sport pilots that like to set up a lot of negative pitch. But for the rest of us, you really only need to adjust IM_STAB_COL’s 2 & 3 for stick position in Stabilize hover, if you set your pitch range from -2.5 to +10