I would like one question,why is not included in this part of the E4 Messer?

Originally Posted by fruitbat

personally i am surprised that oleg didn't go with an E1 and E4, which would of made the most sense to me.

imagine...in Rise Of flight we have Fokker DVII with mercedes D.IIIa and DVIIF with BMW IIIa engine, both very rare (spec. BMW variant) and most produced variant was DVII with D.IIIau engine....
so having E3 in BOB and not having E1 and E4 is very odd decision.....also
but like I said...I hope Oleg will introduce E1 and E4 soon after initial release...really hope so....