The design team that developed the A-10 concept and, later, the Fairchild engineers who designed it... interviewed former WWII Ju87 Stuka pilots along with a lot of active-duty Skyraider pilots. When the A10 was in design, the WW2 veteran Luftwaffe dive-bomber pilots (who survived... not many did) were still in their 50's and were very helpful in their input. A lot of their experience was used in the design. I don't believe Rudel himself was interviewed as he was something of a pariah.... and a bit of an un-repentant Nazi living in Argentina at the time.
The value of the Stuka pilots was in their knowledge of air-to-ground against tanks. Which was the military threat at the time.... the Fulda Gap being the highway into Western Europe. Skyraider pilots had good infantry-support experience. But only the surviving Ju86 pilots know 'Tank Plinking' as it became known.
And, hey, Werner von Braun lost, too. Still got us to the Moon.
Too bad they didn't design the Trumpets of Jericho sirens into the A10, though. That would have been just awesome on the Safwan Highway....
Cheers,
Sirhr
P.S. Not to buck tradition here, but why aren't UAV's being considered for this? Without a 'biological' slowing it down, the UAV's could have far more performance, carry heavier loads, etc, etc, etc. Yes, I know... eyeballs on ground and human finger on trigger... right on the scene. And no uplink/downlink delays that matter on CAS when ordnance is coming in danger-close. I get that. But what are the real trade-offs? Is an inhabited aircraft the answer? Just a thought...
P.P.S. According to Wiki... that fount of all knowledge, the design team all read Rudel's autobiography. No mention of whether they interviewed him.