In preparation for the finishing kit arriving shortly, I am on a mission to get as many details as possible done in the aft fuselage so I can close it up with the top skins. I can't start doing canopy work until I do. So, one of my first tasks was a mounting tray for my SkyView ADAHRS units.
If you're like me and new to this whole glass cockpit world, your first question has to be...what the heck is an ADAHRS unit?? ADAHRS stands for "Air Data and Heading Reference System." An integrated flight instrument system that combines the functions of an air data computer (the AD short for ADC) and an Attitude Heading Reference System (AHRS) into one unit. I would describe it as the brains of the PFD. It uses MEMS sensor technology to accurately measure inertial, magnetic, and air data [Dynon SkyView Installation Manual]. So it takes the place of the old school gyro's used in steam intruments, and then some. It needs to be mounted within 1 deg of level on all three axes and at least 1' away from anything magnetic...2' or more is better.
Here is my design...although unique to me, it was heavily leveraged from several designs I seen on VAF. I cant comment enough on how nice it is to be able to see how others have done it. It really helps to see that so you can refine the design as desired. This was constructed from scrap material I had in the shop...namely leftover baffle material from my ER tanks.
And riveted in place just aft of the baggage bulkhead. I'm already thinking I should have biased it to the rear a little more to allow more room for my pneumatic plumbing later. It might be a little cramped?
As you can see, I made it large enough to accomodate two ADAHRS modules for redundancy. I was happy with how this little project came out. Once again, a lot of fun creating things ad lib...but time consuming.
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