3Sqn_Vulcan

Nah western. Don't work on them, just fly them. Thanks for the tip :thumbup: Hope I don't come across as aggressive! Just curious how the T can have these systems and not have an ADC. What feeds the HUD for starters? Perhaps I digress! I would of thought the "simple" Altimeters would be more prone to errors in the faster higher flying jets (yeah I know we're talking about the T). Would be great to see a schematic though. :book:

You might want to add a third...The last two types of aircraft I have earned a living on have been connected to the ADC (As per engineering manual) and will not read until power is supplied to the ADC. I take it you haven't worked on these yet? Clear as mud.... Cool. So what work do you do on aircraft and what types are you endorsed on?

No air data computer? Really? ....my mistake. :doh: What does the "SVS-1-72-18 air data system" do on the su-25? Always thought this was the ADC. Leaves me wondering where the hud symbology comes from, overspeed info, AoA info etc etc.

Barometrically corrected altitude from an air data computer (hence you need power)