The Wooden Spaceships
Shaw, Bob. The Wooden Spaceships. New York: Baen, 1988.
In a matter of weeks, the heroes "conceive, design, build[,] and deploy a space defense system: wooden fortresses . . . stationed in the gravity-free zone halfway between" low-tech worlds; they also invent jet planes. Rev. John J. Pierce, SFRA Newsletter #171 (Oct. 1989): 39-40, quote. Cf. and contrast B. Aldiss, The Dark Light Years (cited this Category).