3-3-21 P2K GP7 problems

  • Preparing a P2K for sale, it was found to have several issues. The primary fault was in the fundamental performance.
  • it ran very slow at high power
  • Its MSV (minimum sustained velocity) was another twice the normal and the voltage level was nearly six volts. Even the P2K electronics is supposed to start at 4 volts.
  • The engine barely pulled 14 cars on a 2.5% grade. More than a nominal train of 2X the drive axles or 8 cars. Most engines of this weight will pull 17 to 20 cars on the grade.
  • the speed loss for a nominal train was large at both level and 2.5% grades.

Prior to the test, the trucks were cleaned and the axle gears were replaced to eliminate the “cracked” problem.

To understand this problem, a few tests are planned.

  1. The P2K electronics will be removed, thus running on DC with no module losses.
  2. Run a series of wheel materials
  3. lubricate the motor bearings

Depending on the results of these tests, a motor change may be in the works.
Once that has been decided, additional tests will be performed with two classes of digital control modules:

  1. A constant DC Rail Pro.
  2. A NCE DCC card mobile decoder.

after these tests, LED’s will be added and the unit will be sold.

More later.

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