Check out this new App:
Head Speed Tachometer is used to measure the headspeed of your r/c-helicopter.
The sound of the blades will be analyzed and the according headspeed will be calculated.
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.
Before starting the measuring you have to set an estimated headspeed. You can expect most accurate measurings if set inside the range of +/- 500rpm to your real headspeed.
Works with electric and nitro helis without changing any settings.
For more information visit: https://play.google.com/store/apps/details?id=at.idsoftware.headspeedtach
Here are couple of the app screen shots:
Reported by: idsoftware