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Shp vs Lbs

VSP4264

VSP4264

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171
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brazil
What formula do you guys use to convert SHP to Lbs for the static_thrust field in the [TurbineEngineData] section of the aircraft.cfg?

After some research and testing with Gemini AI, I’ve settled on a 'sensible average' of 18.5% of the rated SHP. For example, a PT6A-140 engine with 867 SHP would result in 160 Lbs in the aircraft.cfg.
 
Since that engine is a reverse flow free turbine, it doesn't work exactly like direct mechanical drives. Static thrust for a PT6 is the thrust from the turbine exhaust which is not enough to make the aircraft fly. It averages, based on real documentation I have, to be about 150lbs but is out the side of the engine's front. It's an odd value to care about for this engine, but your value isn't a bad one.
 
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