After assembling a playable demo of "Flight Unlimited", the team requested assistance from then-US Aerobatic Team member Michael Goulian, who worked as a flight instructor at the nearby Hanscom Field. Because of the game's flight code, Goulian was able to execute aerobatic maneuvers within less than three minutes of playing the game; and he later performed his "entire basic aerobatic routine". Blackley told "PC Gamer US" that, while Goulian disliked flight simulators, "When he flew "Flight Unlimited", he just said 'pretty cool.' I was so psyched". Goulian assisted the team during the next year of development: he co-designed the game's flight lessons and advised the team on adjustments to the plane models. Aerobatic pilot Patty Wagstaff was also consulted. At one point, the team encountered problems while testing a maneuver in the game's Sukhoi Su-31, and Blackley was concerned that he would need to rework the game's physics code. However, Goulian phoned a colleague—a Russian pilot—who told them to compensate for the plane's abnormally large ailerons. Using his advice on flying the real-world plane, the team found that the maneuver worked correctly. Goulian endorsed "Flight Unlimited" and wrote the foreword to its official strategy guide.