FO3 has Flying machines they are called Vertibirds. FO Tactics does no have anything that flies in the game. Second FO3 aka Van Buren was to have alot of vehicles, police cars, fire trucks and so on. That was where fallout was going back then.
I believe he's refering to the Airships in the FOT intro.
Fallout Tactics DOES have flying machines- giant zeppelins that flew the Brotherhood to the Missouri area in the first place. They're shown in the initial cutscene. Now who supposedly built them? The West Coast Brotherhood of Steel. Yet they lack any form of vehicle technology in the first two Fallout games- so clearly Tactics redefined their technological capacity. Once again, I'm calling BS on the side of Tactics.
Nonsense.
Can the BOS build a light steel structure - Yep, I'm fairly sure they know how to weld.
Can they weave? Yep - They make combat armour from Kevlar Fabric
Can they make a DC current? - If Vree can design a Laser pistol, I don't think a DC current through water to seperate it into Hydrogen and Oxygen is much beyond them.
Can they build and maintain a motor - Yes, they have working elevators.
Therefore, the building of an airship is clearly within the BOS' capability. They may not have the resoruces to build a fresh batch of powered armour, but an 18th century flying vehicle would hardly be a challenge.
I see no reason at all why the BOS could not have early 20th century style Aeroplanes and Gliders - they have the requisite skills to build such devices (lightweight structrure + fabric + Engine), just because they arent show in game doesnt mean they don't exist - its game logic after all (all you see is a representation of all thats there). If you can only coun't what you see in game, V13 has 3 innacessable levels (as they're shown on the vault of the future poster, but there's no physical way to get there).