Using realflight 3.5, seems pretty good, only issues I am having is with depth perception once the bird gets more than about 50 ft away per the sim. Hard to make determinations in a 2D world. Have the sim projected onto a decent sized screen so not sitting on top of my computer screen trying to seewhat is going on. The Hump has changed just a bit since 76/77, currently poised to be the major installation on peninsula. Still one Mohawk here (display) but other than that probably all the old birds are gone. Fixed wing are all RC-12 and RC-7 and the rotary wing birds run the whole inventory the Army has.
ORIGINAL: Cyclic Hardover
I was a flyer at Humphreys back in 76/77. Have you access to a cheap simulator? While your at it what type of heli is he trying to sell you. Although $5500 down to $2200 is a deal and may be top equipment. I see decent Raptors for around $1500.