RE: Does your club noise test turbine jets?
David
One interesting point in the above that had passed me by was in clause 1 "The maximum allowable noise energy output should be 82dB(A) measured at 7m from a model held 1m above the ground with noise energy output readings measured at 4 specified points 90 degrees apart." The sound readings therefore do not have to be at right angles to the airframe, but at right angles to each other, this means that the readings at the rear of the airframe can be at 45 degrees to the jet efflux, this would considerably reduce the Db reading at the rear, will have to try this to see what difference it makes.
Mike