If your Dad was in the TH-55, Mattel Messerschmidt, at Ft. Wolters, we may have crossed paths in early 70. I was in ORWAC 70-24. Mr. Duncan, a civilian, was Flight Commander. The infamous Ronnie Westmoreland, also a civilian, was my instructor. Even if your Dad came after April, he heard of Ronnie Westmoreland. His entire stick, three students, always were the first three to solo. That was even when he had Vietnamese students who spoke little English. I was the first to solo in Class 70-24.
Westmoreland is more responsible than anyone else for my weird teaching style. He taught me to hover on my first lesson in twenty minutes. I had flown Cubs so I understood moving the controls. Cpt. Mike Edelman and 2Lt. Steve Cannon, my stick buddies, said he would get irritated with them not moving the controls enough. He would throw the cup of coffee, he always carried, in the chin bubble and push the left pedal to the stop and say, "This is the left anti-torque pedal. It makes the helicopter pivot to the left." He would let the helicopter go all the way around 360 degrees and stop exactly on the pole we used to line up on before stopping momentarily and then demonstrating what the right pedal did.
Since this thread is on checklists I will also tell the Westmoreland checklist story. The first day, we three students went out and started the several page pre-flight checklist. We were on about item five when here he came around the corner of the building yelling, "Why ain't the rotor turning? Get in," pointing at Cpt. Edelman, "let's go"!
Sloppy yes. Unconventional yes. Irresponsible yes. He turned out hundreds of really good helicopter pilots for the Army in Vietnam. There was a war going on. Politically correct techniques are not always the most efficient. They are, however, always the most politically correct.
Download my free "https://tinyurl.com/Safe-Maneuvering" e-book.