NEREID V


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THE ENGINE / PROPELLER PERFORMANCE SUMMARY BELOW IS BASED, IN PART, UPON THE EXCELLENT ON-LINE PROPELLER SIZE ANALYSIS PROGRAM AVAILABLE AT PropWorks.COM. AT THE TIME I ANALYZED NEREID V'S PERFORMANCE THIS SERVICE WAS PROVIDED FOR FREE, I NOTE THAT THEY CHARGE FOR THESE ANALYSES NOW.



CALCULATED ENGINE / PROPELLER PERFORMANCE
ENGINE ENGINE FUEL PROPELLER PROPELLER BOLLARD
SPEED OUTPUT CONSUMPTION SPEED TORQUE PULL
rpm hp gph rpm ft-lb lb
600 2 0.1 243 43 169
800 5 0.3 324 76 301
1000 9 0.5 405 119 471
1200 16 0.9 486 172 678
1400 26 1.5 567 234 922
1600 39 2.2 648 306 1205
1800 55 3.1 729 387 1525
2000 76 4.2 810 478 1882
2200 101 5.6 891 578 2278
2400 131 7.3 972 688 2711
2600 167 9.3 1053 807 3181
2800 208 11.6 1134 936 3690

NOTES

  1. Engine output includes 3% loss for the reverse/reduction gear.

  2. Fuel consumption is estimated based upon 5.6 gph per 100 engine hp. Thus this data is only approximate, Caterpillar data sheets give fuel consumption as follows for a 3208 NA, 11.9 gph at 2800 rpm, 7.0 gph at 2400 rpm, and 3.2 gph at 1800 rpm. This Caterpillar fuel consumption data assumes a propeller matched to the 210 hp rating at 2800 rpm and that the engine output (hp) varies with the cube of engine speed (a typical propeller characteristic.)

  3. All data is for one of two engines.

  4. Reduction gear ratio is 2.47:1

  5. Propeller is 26 inch diameter by 23 inch pitch, four blade, uncupped, bronze.

  6. Engine output is assumed to vary with the cube of engine speed (a typical propeller characteristic.)

  7. Bollard pull(static thrust) is estimated and assumed to vary with the square of engine speed.


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    NEREID V


    Revised 03-27-99