1. A 1:24 scale model of a submarine is tested at 60 m/s in a wind tunnel using standard air at sea level.
(a) Determine the prototype speed in seawater at 20°C and
(b) for a model drag is 7.20 N, determine the prototype drag.
2. A model airplane represents a 1:24 scale prototype. The prototype is required to fly at 765 km/h, the Reynolds numbers of both model and prototype are required to be identical and the air temperature and pressure are to remain the same. Determine the air velocity in the wind tunnel