Making A Custom Engine Spec For The Pennsylvania Railroad Q2

Hey, everyone. I've got another thing to ask about and this is really important to me! I recently got Roloz's Pennsylvania Railroad Q2 pack and I'm looking to make a special engine spec for this locomotive that is accurate to the performance of its real life counterpart. I'll provide some details about the PRR Q2 below for anyone who needs something to go off of.

1. The Pennsylvania Railroad Q2 was a 4-4-6-4 duplex steam locomotive built for freight service.

2. This locomotive was said to be able to pull 125 freight cars at 50 miles per hour (80.4672 km/h).

3. The PRR Q2 could produce a total of 7,987 horsepower at a speed of 56.7 miles per hour (91.2498 km/h).

4. Its top speed is 70 miles per hour (112.654 km/h).

5. The Q2 had a tractive effort of 100,826 lbf without a booster and a tractive effort of 115,826 lbf with a booster (I'm hoping to get a spec that goes off of a Q2 with a booster).

I should mention that I don't know how to make these specs for the locomotive myself.

Those are the details I feel are the most essential to know. I know this is specific but if you guys could help me with this, I'd greatly appreciate it!
 
Maybe have a look at some enginespecs you already have? I am looking at a file and it has stanzas like "flowsize", "volume", "pressure", "mass", "motor", and "steam". That is for a big boy, so not sure how many of these or how many items under each are required, some have quite a few items.
 
Maybe have a look at some enginespecs you already have? I am looking at a file and it has stanzas like "flowsize", "volume", "pressure", "mass", "motor", and "steam". That is for a big boy, so not sure how many of these or how many items under each are required, some have quite a few items.
I have been exploring the issue quite a bit but I have not found a direct way to impact the locomotive's horsepower. However, I think I did fix the tractive effort situation.
 
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