Reduce tractive effort to HP conversion by 40%

[DanielBoudreau]

No description provided.

[mergeable]

Thanks for the PR. It includes changes to properties files, so the 'Needs L10N' label has been added"

[mergeable]

This PR includes files in the help hierarchy so the 'Documentation' label has been added. Other labels may also be applied."

[DanielBoudreau]

restart travis after:

ERROR] Failures:
[ERROR] RpsSensorManagerTest>AbstractSensorMgrTestBase.testProvideFailure:116 Level mismatch when looking for ERROR message: "Invalid system name for Sensor: System name must start with "RS"." found "sendLocoNetMessage: IOException: java.io.IOException: Read end dead"

[DanielBoudreau]

Restart Windows CI Tests after:

Error: Errors:
Error: LayoutEditorToolsTest.tearDown:655->Object.wait:502->Object.wait:-2 � TestTimedOut

[codecov]

Codecov Report

Merging #9887 (f0c825e) into master (058f564) will decrease coverage by 0.1%.
The diff coverage is 66.7%.

@@             Coverage Diff             @@
##             master    #9887     +/-   ##
===========================================
- Coverage      51.7%    51.7%   -0.0%     
- Complexity    64214    64225     +11     
===========================================
  Files          5112     5112             
  Lines        446323   446323             
  Branches      64479    64479             
===========================================
- Hits         230742   230712     -30     
- Misses       192797   192833     +36     
+ Partials      22784    22778      -6     

Impacted Files	Coverage Δ
...erations/rollingstock/engines/EngineEditFrame.java	88.7% <66.7%> (ø)
.../jmrix/roco/z21/simulator/Z21SimulatorAdapter.java	36.4% <0.0%> (-15.9%)	⬇️
.../src/jmri/jmrix/roco/z21/Z21TrafficController.java	29.1% <0.0%> (-10.0%)	⬇️
...va/src/jmri/jmrix/roco/z21/Z21XPressNetTunnel.java	70.9% <0.0%> (-7.5%)	⬇️
...jmri/jmrit/pragotronclock/PragotronClockFrame.java	92.5% <0.0%> (-7.5%)	⬇️
...perations/locations/schedules/ExportSchedules.java	71.8% <0.0%> (-6.4%)	⬇️
java/src/jmri/jmrix/roco/z21/Z21HeartBeat.java	65.3% <0.0%> (-4.3%)	⬇️
...ri/jmrix/roco/z21/Z21XNetStreamPortController.java	95.9% <0.0%> (-4.1%)	⬇️
...ix/roco/z21/simulator/Z21XNetSimulatorAdapter.java	27.4% <0.0%> (-3.2%)	⬇️
java/src/jmri/util/ThreadingUtil.java	57.3% <0.0%> (-2.7%)	⬇️
... and 27 more

---

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[coveralls]

Coverage decreased (-0.008%) to 56.854% when pulling f0c825e on DanielBoudreau:master into 058f564 on JMRI:master.

[DanielBoudreau]

Restart Windows CI after:

Error: Errors:
Error: LayoutEditorToolsTest.testSetSignalsAtTurnoutWithCancel:396 � TestTimedOut tes...
[INFO]