A game is several turn, not only one...
For exemple, on turn 1, you send ahead your fighters to dogfight enemy fighters and fast air models. This begin to send some SAW in your scrapyard, as well as inflicting some damage to enemy. Your skyfortress will climb to stratos and move forward.
On turn 2 you continue to sacrifice your fighters to clear enemy fighters and attack flying models. Mid turn 2 you easily should have more than 8 SAW in your scrapyard. late turn 2 you activate your skyfortres to recreate 2 SAS (fighter or bomber/torpedoes if any models is within 16 or 20'' from the skyfortress) this 2 new SAS will be able to activate immediatly and will be able attack the target for which they have been put in air.
And so one... on turn 3 all your initial fighters should have been killed already one time, meaning more than 15 to 20 SAW has been back to scrapyard, offering enough spare to rebuild the turn 3 wave of SAS... At this point the skyfortress is in the middle of the enemy fleet, and can directly rearm and replenish SAS (which therefore don't loose a round to come back to the carrier du be rearmed) instead of relaunching from the scrapyard is there is not enough SAW there...
And carrier points
try to compute the nomber or AD you have to send at a Savannah in stratospheric in order to prevent her from relaunching the 2 SAS ? 4 times 18+AD attack to remove 4HP (without using RB1 fire from surface)... It's just enormous !
You should try if you are not convinced that it is awfully powerfull...