I got this example sentence in my Kanji practice book, and I don't quite get it's meaning. 今日はとても寒いです。服を何まいも重ねてきています。 I always get a bit confused with the uses of も. In this case, what does も indicate?
There is no relation here. It is simply 何機も followed by the form 〜(よ)うとする. The 何機も corresponds to the combat planes because planes are counted with 機. The 何 + counter + も pattern just means "several" or an undetermined amount of that thing. For example
食堂に生徒が何人もいます → There are several ...