1. This mode will write data to your SD card which can help us find a solution. - Record audio: Needed to record audio from your mic. v1. 0. 1: Touch at rpm bar of log to display exact value. v1. 0. 1: Debug mode (please contact us at android@id-mobile. net about how to enable debug mode). v1. 0. 2: Improved algorithm and increased rpm search range. v1. 0. 4: Prevent orientation change during measuring. v1. 0. 5: Preserve measured data during orientation change. v1. 0. 6: Successful license check is valid for one week to use the app on the field without internet access. v1. 0. 10: Rename of Logentries.
2. If you have any problems measuring correct headspeed please contact us at android@id-mobile.
3. After setting an estimated headspeed place your phone on the ground 1-2m from your helicopter.
4. Please supply information about the phone and helicopters you measured the headspeed.
5. Using Settings you can choose between standard (rpm up to 4000) and micro sized (rpm up to 8000) helicopter and setup the number of blades between 2 and 5.
6. Before starting the measuring you have to set an estimated headspeed.
7. After the blades have come to a stop retrieve your phone and press the "Stop measuring" button.
8. Press the "Measure headspeed" button and walk to a save distance.
9. Spool up the helicopter to your desired headspeed and wait about 20 seconds.
10. You can expect most accurate measurings if set inside the range of +/- 500rpm to your real headspeed.
11. The sound of the blades will be analyzed and the according headspeed will be calculated.
1. Thank you!Based on my calculations this app is pretty accurate based on my My needs and it is a great extra tool to havedid not give any consistent readings, rising rpm gave lower readings etc.This app needs to be updated, to be compatible with modern Android devices.great app and very accurate, and so simple to use.
2. This app treats your copter as a musical instrument and listens to the quadruple harmonics of your copter's noise, about the frequency of piano tuning fork A4=440hz, which is the frequency humans are most sensitive to and the phone's microphone most sensitive to.
3. Crazy enough for a cheap appDuring installation, received a warning that the appl might not work with new android phone..no way to check for updatesFantastic work.
4. This is basically a guitar tuning app repurposed.Excellent app confirmed working on my Pixel 2 XL running Android 10.
5. Measured headspeed within a few percent of what I'd manually calculated for my 450 size heli.I love the app but estimated headspeed is so dim it can only be seen in the dark.
6. Im guessing it happened after some update.I looked on the net to find the rpm of the trex 150 was 7500 according to align with 8200kv motor.
7. Then divide this frequency by 4 to get the blade frequency, and then divide it by the number of blades.
8. This app read my rpm at 7700 and i have the 9000kv motor so it's well within the ballpark.
9. Very accurate.
10. Makes FC setup a lot easier.