The first 85 Series auxiliary power unit (APU) for commercial use was produced in 1954 and quickly earned a reputation for its “bulletproof” performance. This led to its selection as the first APU for installation in an aircraft – the Boeing 727 in 1963. From that point on, ground crews no longer had to rely on ground-based electrical power and compressed air to start engines – forever changing commercial air travel. For the first time, flights could access the most remote regions of the world.
To date, the 85 Series has generated more than 100 model variations with countless commercial and military applications. We’ve produced more than 33,000 APUs of this type, with production deliveries for the C-130J Super Hercules from Lockheed Martin continuing into the future.
Fittingly, the 85 Series has been inducted into the Smithsonian as the world’s first, and most widely used, aircraft APU.