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MP and Tach gauge

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I have an aircraft with counter-rotating engines/props (the left engine turns clockwise, the right turns counter-clockwise), this is specified in the aircraft.cfg and works as it should in FS2002. However, the 'backwards' rotating engine does not show proper indications on the MP and Tachometer. How do I edit the existing right tach to show proper indications? It is XML by the way and I have absolutely no programming knowledge. Is there a variable I need to add, change, etc, in the XML code? Any help would be greatly appreciated.Brad

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This question was already posted some time ago. The tach shows negative RPMs for counter-rotating props, therefore you need the 'abs' operator for this purpose, insert directly after the A: variable for RPM.Arne Bartels

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Thank you for the answer, now let's hope I can implement it!Brad

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Works like a charm...the article is on Contra-rotating props, so I skipped over it the first time as I was looking for counter-rotating props. Thanks for your help.Brad

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