Yes, its been a long break from the build, every year Christmas and getway trips take their toll on the building process, but what the heck, its a hobby not a job, right?

Before Christmas I finished adding a flap position sensor system. I did mine a little different than the other examples I have seen on the web. I used the standard Ray Allen position sensor which is a linear motion potentiometer of 0 to 4k ohms. The circuit uses a regulated 0-10 volt source and I use 10 volts as my 0 degree setting and 0 volts as my 40 degree setting. If the circuit has a problem, I’ll know right away when my flap position indicates 40 degrees. I used a .5 inch travel sensor in place of the usual 1 inch travel model. I used a couple of links to divide the motion of the flap actuator in half and linearize the travel/voltage reading as much as possible. It took a bit of trial and error to get the links length correct but I’m happy with what I see now as an indicated position on the TC7 Engine and Flight System Manager (EFSM). That’s the new accro dreamed up for the new box I have created for the panel. More on that in subsequent posts.