You have that slide rule in the back of the closet. Maybe it was from your college days. Maybe it was your Dad’s. Honestly.

This year’s Guide covers turbine powered, in production aircraft. For out of production aircraft data contact AirPower Software Group, Inc. Aircraft operating costs are presented in a format that ...

IN the preface Prof. Peirce writes:—“Logarithms ought not to be comprised, as they often are, in the midst of a treatise on algebra. For, in the first place, they are not algebraic functions; and, ...