Hi here are a couple ideas I've come up with.
Strategy
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All airfields should have "spare" aircraft parked next to the runway. Possibly different groups of spare aircraft according to type (e.g. cheap fighters and bombers outside in a nice line, high quality fighters and bombers inside a bunker or something similar). If a certain group of spare aircraft are destroyed then the enemy can't fly those aircraft for a predetermined amount of time..
Even better would be the idea that there are so many "spares" at a field (in a group like I said). In which people can jump into and fly. If say someone yells on bishop channel F2 is being attacked this could stop 50+ bishops from jumping into planes since only 5 spare spits, 5 spare bf109s and 5 fw190s are available. Say if some of the spares are damaged then some people might end up jumping into a damaged plane.. but hopefully it'll still fly ;0
Now in order to determine "regeneration" rate of the aircraft there would be aircraft factories. Different types/classes of factories for different aircraft. Say you don't want the rooks to have fw190s, well their solution is to bomb their fw190 factories and blow up the spare fw190 fighters on the field.
Since AH is meant to be realistic I think this level of realism would be a definite BONUS to the game.
Furthermore this will give those vulchers something to shoot on the ground and watch things go "boom"

Walking/Looking
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I really really like flying the B17 because nothing passes the time like taking a walk through the plane. However, I think it would be really cool if the entire plane was modelled so that someone could walk throughout the aircraft and get an "inside" perspective of what these beautiful machines looked like.
This also "sort of" applies to the airfields. Rather than have us "zoom" to cockpits and such.. why not force us to walk out to the airfield. Take a couple minutes to look at the surroundings and maybe walk by some comrades otw to the flight line. Then when we get to our "spare" plane we just climb onboard, throw the engine and go kick some butt

Another thing about walking on the airfield is that you would have to avoid "incoming" attacks (dodging bombs, avoiding gunfire) as you run out to your plane. IMHO this would be veeery cool.
Merging
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Ok a lot of people might not like this idea especially the developers. Why doesn't AH and WWIIOnline merge ? If they did so HT and crew could make a kickass flight sim and basically plug it into the wwIIonline world. Let the other guys worry about vehicles/infrantry and other stuff. Just a suggestion.
Lord HaHa