Pratt & Whitney were using Variable Discharge Turbines on some R-4360s in the mid 40s. There was no throttle as we know it. The power of the engine was controlled by varying the size of the outlet on the turbocharger. 4000+ hp installed. http://www.enginehistory.org/r-4360.htm Ken Ames Quoting Brien Tourville <hh7x@xxxxxxxxxxx>: > > > > http://www.turbobygarrett.com/turbobygarrett/turbo_application_search/ > turbo_search.jsp > > - or - > > http://tinyurl.com/7wxql > > > > Been reading on the VNT - variable nozzle tech. > > > > Brien. > NEW YORK > eagle registry #501 > > eagle kammback registry > > > >