The Variable Density Wind Tunnel of the National Advisory Committee for Aeronautics (1926)
NASA Technical Reports Server (NTRS) · leaf 14
ach side. Cross shafts and levers are employed in order to carry the full weight of the ring to the two lever balances. The drag forces are transmitted by horizontal members (10) to bell cranks and thence by vertical members (11) to lever balance (4). Hanging from the ring are bridges which carry… … Fig. 8—Balance with doors of experiment section removed The sliding weights arc moved by motor-driven screws to which are geared revolution counters; these may be read through peepholes in the shell of the tank. At the end of each beam is a pair of electrical contact points by which the beam may be…
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