SkyDemon Forums

Inclusion of Utility Category parameters in Mass and Balance

http://forums.skydemon.aero/Topic38608.aspx

By grahamb - 12/23/2025 6:10:38 PM

Many aircraft have a Utility Category Mass and Balance envelope within which aerobatic or semi-aerobatic manoeuvres are permitted.

As a minimum it would be helpful to be able to define the limits in the aircraft profile setup and have those values shown at the foot of the M&B graph so the actual values could be compared. Even nicer would be to plot the resultant Utility Category as a shaded area on the graph, so one could immediately confirm more easily whether the proposed flight remains within the parameters. 
By grahamb - 12/26/2025 10:02:28 AM

 
Adam Erchegyi - 12/26/2025 9:05:11 AM
 
grahamb - 12/23/2025 6:10:38 PM
Many aircraft have a Utility Category Mass and Balance envelope within which aerobatic or semi-aerobatic manoeuvres are permitted.

As a minimum it would be helpful to be able to define the limits in the aircraft profile setup and have those values shown at the foot of the M&B graph so the actual values could be compared. Even nicer would be to plot the resultant Utility Category as a shaded area on the graph, so one could immediately confirm more easily whether the proposed flight remains within the parameters. 

I recall there was a recommendation for this: make a copy of the aircraft and change it to the stricter limits.

Yes, that is the obvious workaround, but I already have two profiles for my aircraft - one with the rear seats in place and one with them removed - and I’d rather not have four!