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Multiple <maxrpm> for Constant speed prop JSBSim Cirrus SR20

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Multiple <maxrpm> for Constant speed prop JSBSim Cirrus SR20

Postby angryminister » Wed Aug 09, 2017 3:06 am

I'm working on implementing a constant speed propeller for the Cirrus-Sr20 in JSBSim. I've used <maxrpm> to keep the RPMs at 2700 like the POH requires for takeoff. However, I'm having trouble actualyl changing this maximum RPM to 2500, which is required for all cruise conditions. I've been unable to find relevent sources online. Does anyone have any idea how to implement a changing maxrpm?

Thanks
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Re: Multiple <maxrpm> for Constant speed prop JSBSim Cirrus

Postby erik » Wed Aug 09, 2017 7:29 am

Looking at the code this option doesn't seem to be implemented.

Erik
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Re: Multiple <maxrpm> for Constant speed prop JSBSim Cirrus

Postby AndersG » Wed Aug 09, 2017 8:21 am

Why not make a FCS channel controlling the propeller pitch? If indeed the actual control system can distinguish between take-off and cruise - otherwise this is a limit that needs to be enforced by the pilot. In this latter case case it may be more appropriate to eventually add damage modelling that makes non-compliance with the limits painful...
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Re: Multiple <maxrpm> for Constant speed prop JSBSim Cirrus

Postby Bomber » Wed Aug 09, 2017 8:39 am

The p51 should have a constant speed prop... see what was done there
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