I just posted a new software update for the Climb_and_Dive Timer.   V1.5 of the program code.  The  instructions have also been revised to incorporate the latest developments.  Please have a look at them for the details about the latest changes.

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.  The library file hasn't changed this time but it never hurts to drag and drop both the code.py and the complete lib folder onto your CIRCUITPY drive.  Remember to "Replace all" when asked, don't merge or keep both.

The most notable change is the additional setting to add a short boost in RPM in the bottom corners of the square maneuvers.  This should help counter the high drag experienced in the sharp turns.  This feature requires a calibration of the accelerometer sensor.  To that end, I have added a couple of more steps to the Timer Mounting Position and Calibration routine.  This process has to be completed before the corner boost settings can be used.  Please see the instructions for details.

The other new item is an innovative emergency stop feature.  The inability of the pilot to stop and land at any time has always been the unspoken safety concern in control line.  Not any more.  Problem solved without any additional remote control devices.  All that is required is three consecutive pulls on the handle and the motor will stop.  The timer is programmed with a form of gesture recognition that detects the lateral movement of the airplane.  The skeptics will ask, "What if that happens in the middle of the pattern or on windy days?".  From the accelerometer log data, there is no 'normal' condition that comes even close to the same effect as pulling on the handle and the resulting lateral movement of the airplane (let alone having it happen 3 times in a row).  This feature is still an option and has three settings: OFF, Test and ON.  The test option allows you to get a feel for how it all works by causing a short increase in RPM instead of an immediate shutdown.

The motor startup function has been refactored and should work better with lower pole count motors.

Please give the new version a try and let me know your feedback.

Full details of the timer can be found 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/

BTW - the $800 dimimis exemption for Canada is still in place so USPS shipments are tariff free.

Nicely done Paul!

I had a failure with version 1.5 As I already wrote to Paul in an email. I tried two setups that worked fine with version 1.4
Setup #1 ESC CC Talon 35 in multirotor mode, with the latest firmware. Turnigy 3536-1200KV motor. 3S 2200 mAh LiPo battery
Setup #2 ESC SEQURE 28120 with AM32 firmware. AEOLIAN 4250-600KV motor
In both cases, after the delay time expired, the motor did not start, and the LED showed two red flashes. I recorded a short video but I don't know how to insert it here, so I'm posting a link to a video of an unsuccessful launch attempt on a test bench. I hope Paul can help me figure this out. Although version 1.4 works fine, the new features of version 1.5 make it very interesting. https://drive.google.com/file/d/1E1uvhpB8MqX6XT3G5UZ9CvsurSmhgLVj/view?usp=sharing

OK, fixed the issue with CC ESC's.  Thanks for the heads-up Maksim.  I bumped up the starting PWM signal from 1090ms to 1130ms.

The latest download will install and appear as v1.5.1 so you should be able to verify if you have the corrected version installed.

Sorry about that.  It's hard to catch everything but at least it's easy enough to fix.

Paul, thanks for the quick fix! I suspected it was the PWM start signal. But the timer description only lists PWM throttle setting for start-up blip (1150) but there is no information about the full range of PWM that the timer generates. ESC with AM32 firmware can be easily adjusted to match the timer PWM range. Jeti SPIN 66 also has the ability to adjust the start and end points.

Thanks Paul, it's just that I already have one that's all, so I can use it as a backup if needed.

The Climb_and_Dive timer is approximately 1-1/8" x 3/4" x 3/8", 0.2 oz.  If you include the connectors plugged into the end the overall length ends up about 1-3/4".

Actually, I have a prototype twin version ready for some test flying this Summer.  It will be a bit longer and has a bunch of pins on the end to accommodate for the two motors, retracts and a remote PB switch connection. I also included a socket to plug in a remote LED.  Because the timer can monitor the actual motor RPM there is a lot of safety features that can be added in case one of the motors misbehaves for some reason.  Can be used for single engine, conventional twins or inline twins.  The RPM setting applies to both motors with another setting to bias the outboard/rear motor + or - a few RPM.  Retracts can be manually operated from the Bluetooth programming mode for testing and storage.  It works great on the workbench so far.  Just the sound of the twin motors operating is pretty cool.

I have no estimate as too when (or if) it will be production ready, so no promises.  I might need a beta tester or two along the way as personally I'm not a fast airplane builder, especially a twin with retracts.

Hi Jim:

You mean like this...

Bob Hunt