Relative efficiency of direct and geared drive propellers (1924)
NASA Technical Reports Server (NTRS) · leaf 6
ring, which is here taken at 98 per cent, although a slightly higher figure may be obtained by careful design. The net efficiencies 1]^aJ 17'jb? v\s.t and 7}\\i so obtained by the calculations in Table IV are then plotted on Figure 2 against ("^} direct comparison as previously explained. Figure 2… … .32 LOO .60 JO MO .50 .30 M fXJ For two bladedpropeffery (j^) ^ (of waxJfTKjm emdency) ^^^^ Fig. 3. Relative net maTfTnnTn efiScienoies for 2 and 4 bladed propellers. CONCLUSIONS. In Table V there are given the actual values of the efficiencies previously calculated, together with the relative…
NASA Technical Reports Server (NTRS)
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