Pitot-Static System, Air Data computer. Free plans and build resources

[JLJ]

I've made one air data computer, complete with a DIY pitot-static probe; I've used it for a while, fun a (relatively) useful . You find online all the plans, and the software, necessary to build your units. Most common applications on RC planes include altitude and true airspeed measurement. You find here an article about ADC basic usage. I thought it could be helpful for others to share here this material.

 

[Foam Addict]

Very cool! I built a ground based system for a wind tunnel, but never made it airborne. Well done for designing it and making it available to the community!

 

[DamoRC]

Cool! Does the Teensy have additional capacity to record electrical info too, cell voltage, current?

DamoRC

 

[JLJ]

@Foam Addict, Thank you! Ground systems stuff? Sounds terrific. My original project evolved and different people contributed, I owe a lot to Basic Air Data team. Anyway, a third-party team tested our Pitot Probe within a wind tunnel.
@DamoRC Good point. Sorry, it Is necessary to add some circuitry to handle high voltages or currents. However, Teensy capabilities are pretty good, pinout here. For the ADC we used limited hardware resources. It is really hackable. ADC PCB Design files are posted on Github, you find the schematics(simple) here.

 

[OttoPilot]

Oh cool, I'll have to check this out when I get home!

I've had some pressure transducers sitting on the bench for just such a project.

 

[JLJ]

Oh cool, I'll have to check this out when I get home!

I've had some pressure transducers sitting on the bench for just such a project.

Save yourself! Don't come to the DIY instruments dark side!

 

[JLJ]

Regarding the Pitot-Static probe. For the simpler model, you need some pipe and a 3D printed head. I've used for long the flanged model; the main advantage is that you can align the probe quickly.


Of course, the probe length varies in function of your application and airframe. Materials also can be changed.
I'm a participant in the project, I can ask questions regarding the make and the use.

 

[JLJ]

A quick update.
I've been told of a new RC F104 build that includes a custom homemade Asgard by Basic Air Data. That is a lovely application

 

[JLJ]

Another update:
A bold group of amateurs decided to cope with the issues related to the Asgard material sourcing. It is not a commercial initiative, and it is DIY oriented.
If you are interested in Air Data Computer Asgard, please give your feedback!