West London Aero Club have recently been testing a hush-kit on one of their Warriors.
This has been a success and I believe that their Engineering Dept.has, or shortly will have, CAA approval for a standard fit on all small Piper models.
The silencer used does not cause any reduction in performance.
Having said that, I totally agree with Genghis that the best way to stop irritating the neighbours/nimbies/killjoys is to fly that little bit higher whenever possible.
[This message has been edited by Sleeve Wing (edited 24 March 2001).]