A new software update is available for the Climb_and_Dive Timer. I recently released v1.3 of the program code. Note: there’s also revisions to some of the pages of the instructions to incorporate the latest developments. Please have a look through them.
The Software page of the instructions
https://circuitflyer.com/Climb_and_Dive/docs/Software.html has all the details of how to download the new code and update your timer. It’s just a simple drag and drop.
I have been flying and testing most of the Summer to improve the active output of the timer. For testing purposes I was able to add data logging to one of my timers to collect more quantitative information. I spent a lot of time trying different filtering of the accelerometer output. I finally found some improvements by going with a digital low-pass FIR filter. I also incorporated a method that should help reduce the filtering delay when making a sharp turn upwards from level flight.
The most notable change is the addition of overhead boost to help improve overhead line tension. The additional RPM comes on at around 45 degrees and peaks directly overhead. Originally this had a tendency to add to the climb gain setting and result in too much boost. I have since altered the code to clip the maximum peak off of the climb gain output and now the two functions compliment each other and both work very well together.
One new thing to note: In order for the overhead boost to work properly, the timer needs to record the ‘normal’ centrifugal force during the flight. This is accomplished during the first 10 seconds after take-off. Be sure to always keep the airplane straight and level for about 2-1/2 to 3 laps after take-off while it records some data. Performing this calculation each flight allows you to make changes to the lap time (change props or try different line lengths) without having to go back and adjust any active function settings.
Give this new version a try and let me know what you think.
Full details here:
https://circuitflyer.com/Climb_and_Dive/The Climb and Dive timer can be ordered here:
https://www.tindie.com/products/circuitflyer/climb_and_dive-an-advanced-control-line-timer/