Powerhouse系列书籍集合了Georg von Hantlemann的Fokker DVII与Eddie Rickenbacker的SPAD XIII。该游戏提供了可能使用这套游戏的其他几个第一次世界大战战斗机的统计数据。“力量”书籍包括与Handy Rotary书籍中使用的不同种类的机动，使得有趣的比赛在两套。
The Powerhouse Series book set pits the Fokker DVII of Georg von Hantlemann against the SPAD XIII of Eddie Rickenbacker. The game provides statistics for several other WWI fighter planes that may be played using this set. The Powerhouse books include a different variety of maneuvers than was used in the Handy Rotary books making for interesting match-ups between the two sets.
