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High RPM (Read 1438 times)
Apr 1st, 2018 at 4:44pm

6adan   Offline
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WE seem to be getting double what the RPM should be on our Skyview. Can someone give a clue as why we are seeing this. WE checked it with a external rev counter.
 
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Reply #1 - Apr 1st, 2018 at 5:23pm

kurt Rutkowski   Offline
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Check your setting of the PULS/REV R and L values as described in the Engine Information Section.  Value depends on # of cyl's and type of ignition.

 
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Reply #2 - Apr 1st, 2018 at 8:08pm

jakej   Offline
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Usually the PPR is 1/4, 1/2 or total number of cylinders, ie in your case (RV6A - Lycoming ?) it's a PPR of 2 or 1.
 
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Reply #3 - Apr 2nd, 2018 at 11:10am

6adan   Offline
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Thanks, will check this. I should have given more info. RV6A with o320.
 
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Reply #4 - Jun 8th, 2018 at 2:45pm

Frank   Offline
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I had this with my rotax 914. The rev counter was correct up to 2600rpm but then the gauge read double when checked against the rotax program on a laptop. The pulse setting was set to 1. The solution for me was to insert a 27k ohm resistor in the pulse wire from the TCU to the ems.
 
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Reply #5 - Jun 15th, 2018 at 5:34am

RayInGA   Offline
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The ignition type also matters. If connected to a standard magneto, you will need a resistor inline, per the installation manual. The PPS should then be set to 2 for an O320 engine.

If using electronic ignition, no resistor is required but the input to the EMS module is different.
« Last Edit: Jun 15th, 2018 at 5:35am by RayInGA »  

Ray Eaker
RV-7A flying since 27 Jan 2017
Dual Skyview 1000T with all available Dynon VFR goodies
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