Aircraft
Pilot Report: Flying a Walter-powered Beech King Air C90
I recently had the chance to fly one of the King Air C90s re-engined with two Walter M601E-11s

I recently had the chance to fly one of the King Air C90s re-engined with two Walter M601E-11s, which are 751-shp engines flat rated to 550 shp for this installation. The airplane we were flying was N800RP, a 1974 King Air C90, S/N LJ-628. Dan Sigl, owner of Seagull Aviation, which is working on a conversion package for King Air 90s and 100s, agreed to bring the aircraft to my home base, Solberg Airport in New Jersey. Sigl is associated with the STC holder, Performance Conversions, Incline Village, Nev. Another company, LoneStar Propjets, Waco, Texas, has a separate STC.