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Calculate The Days Run Allowing 6% Positive Slip

If the pitch of the propeller is 19.4 feet, and the revolutions per day are 96,713, calculate the days run allowing 6% positive slip.

Given:

Pitch = 19.4 ft
RPD = 96,713
 Slip = + 6%

What is asked?

Days run

Solution:

This is the formula for solving days run:

                   Days Run = RPD x P x eff
                                            6080
1. Solving for efficiency.

                   Efficiency = 100 - Slip
                                          100
                                   = 100 - (+6)
                                           100
                                   = 100 - 6
                                          100
                                   = 94 
                                     100
                   Efficiency = 0.94

2. Solving now for days run.

                   Days Run = RPD x P x eff
                                            6080
                                   = 96,713 x 19.4 x 0.94
                                                 6080
                                   = 1763658.268   
                                           6080
                   Days Run = 290.1 miles

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2 comments:

  1. UnknownJuly 22, 2019 at 7:51 PM

    Why is the Days Run formula similar to getting Speed of Advance? How can getting speed be same as getting time?

    ReplyDelete
  2. UnknownJuly 22, 2019 at 7:58 PM

    Formula should be getting Speed of Advance, and using that speed in getting distance by means of Distance=Speed×Time

    ReplyDelete