Your best initial resource for these questions is the Memoir '44 FAQ.
I suggest you download the low resolution version to some device where you have access to read it:http://www.daysofwonder.com/memoir44/en/advanced-play/
In the short run, here are some quotes from the FAQ on the topic at hand:
. The Air Pack has been out of print for a while. Will it be reprinted any time soon, or is there any way to find an affordable copy? A
. Unfortunately the Air Pack will not be reprinted, but a PDF version of the Air Pack Rule book and scenarios is available on the Days of Wonder web site. You can follow this link to purchase your copy: https://www.daysofwonder.com/en/buy/Q
. Which Planes can you bring onto the board?A
. The Air Pack rule book and Airplane reference cards tell you which Planes are available to which nations, depending on the date of the scenario. Players can only bring on Planes that were available to their nation during that time of the war.Q
. If the Air Pack symbol is at the top of the page, but nothing is said in the Special Rules, do both players get one Air Sortie card (if they agree to use Air Rules)?A
. The Air Pack symbol may just indicate that some terrain from the Air Pack is being used. If the Special Rules don’t say anything about the Air Rules, the scenario was not designed for the Air Rules and they were not used for play testing, so it may change the balance in an unexpected way. The goal is to have fun though, so if both players want to use the Air Rules, each player gets one Air Sortie card.Q
. When I draw an Air Sortie card, I understand that it is placed face up next to the cardholder and another card is drawn immediately. If an Air Sortie card is drawn after a Recon 1 card is played, how does this work?A
. Same way, actually. When an Air Sortie card is drawn as one of your two cards, place it face up next to the cardholder and draw another card immediately. You then choose between these two cards. It is possible that more than one Air Sortie card could be drawn, and if this happens, follow the same rule and place it face up next to the cardholder and draw another card immediately until you have two non-Air Sortie cards to choose from. Note: The Air Power card is not placed face up because it is an Air Sortie equivalent and if drawn as one of your two cards,you will need to choose either the Air Power card or the other card to keep.Q. When can I use the Air Rules with Official Memoir ʼ44 scenarios?
A. It is always the choice of the players, but speaking about the Memoir scenarios as designed:
» When the Special Rules state Air Rules are in effect, the scenario was designed and play tested using Air Rules. This does not mean players have to use Air Rules, but the scenario results may vary from the play tested results.
» When the Special Rules state Air Rules are optional, it means that the scenario was play tested both ways, using Air Rules and without using Air Rules. The scenario can be played either way.
» When the Special Rules state Air Rules are not in effect, the scenario was designed to not use Air Rules. Air Rules are not in effect because of historical data.
» When the Special Rules do not comment about Air Rules, the scenario was designed to not use Air Rules. If players choose to use Air Rules there is no guarantee the scenario will play as the designer actually intended.
» In the Winter Wars expansion none of the scenario designs are played using Air Rules.Q
. When using the new Breakthrough card deck, how many Air Sortie cards should I use?A
. Two Air Sortie cards should be used when the Air Rules are in effect.Q
. Usually the scenario indicates what to do with the Air Sortie cards, but if the Special Rules don’t specify what Air Rules are in effect, what should players do?A
. First, the Air Power card should never be removed from the Command cards. If the Special Rules don’t specify that Air Rules are in effect, then from a historical perspective, Air Rules should not be used and Air Sortie cards are not used, although the Air Power card is always used. However, players ALWAYS have the option of using Air Rules if both sides agree. If players agree to use the Air Rules but there is an absence of other instructions, each player gets one Air Sortie card.