Collins 331A-8A Horizontal Situation Indicator Teardown

A teardown of another beautifully hand constructed collins instrument used on a 727

[@msylvain59]

8:10 this is just a magnetic flip-dot indicator, normally designed to be mounted on a front panel, it must be used here for calibration and maintenance. BTW I need to find more of such instruments but they are expensive, usually the cheapest ones I see on ebay are in the 100-150 euros price range.

[@BGTech1]

This one was more expensive than what I'm usually willing to spend, but even then it was a good price for such a nice instrament.

[@aaroncrain2343]

Cool

[@lelabodemichel5162]

Cool, I love these modular designs. I have the same but 8K instead of 8A for future teardown.

[@BGTech1]

Hopefully the one you got has the display cards! I was disappointed to realize they where missing on my unit.

[@lelabodemichel5162]

@@BGTech1I am lucky, mine is complete and sealed.

[@BGTech1]

@@lelabodemichel5162 That’s good. Are you going to revere engineer it? This one might be challenging.

[@lelabodemichel5162]

@@BGTech1 Yes of course. I think it is easier with this kind of modular design, there are less parts than classic designs. For the digital ARINC 575 only the inputs have to be find.

[@BGTech1]

@@lelabodemichel5162 A long time ago you said you had a Collins VHF transporter for a video. Are you still planning on making a video about it?