To date, aircraft APU's (auxiliary power units) have been the almost exclusive luxury of the "heavy iron" -- commercial and large business jets. Imagine if, for the first time, the tremendous benefits of safety and utility of these "heavy iron" APU's could be provided for private and military airplanes and helicopters, ranging in size from piston singles all the way up to VLJs and even midsize business jets -- in an ultra lightweight and compact, reliable, quiet, simple-to-operate, and affordable package. Consider the potential of APU capabilities:      •  Independence from batteries and GPU's      •  Backup power supply (non-event, complete the trip)      •  Ground power for dependable engine starts      •  Rapid piston engine pre-heat in winter      •  Cabin pre-cool or pre-heat before boarding      •  Confident operation out of airports lacking GPU's or preheat Welcome to Mallen Research Corporation.