F-35 fleet cleared for ground operations
The F-35 Lighting II fleet has been cleared to resume ground operations after a preliminary investigation found the cause of an electrical subsystem failure, but a Pentagon official refused to speculate when the next-generation fighters will be back in the air.
Investigators on Wednesday determined a malfunctioning control valve caused the integrated power package of AF-4, the fourth conventional takeoff and landing version, to fail Aug. 2, said Joe DellaVedova, a spokesman for the F-35 program.
The IPP, built by Honeywell International, combines the functions that are performed by an auxiliary power unit, emergency power system and environmental controls. Lockheed Martin Corp. makes the aircraft.
All 20 of the Lightning IIs have been parked for the past week, the second grounding this year because of electrical problems. In March, faulty maintenance procedures caused a dual generator on the same AF-4 to shut down.
Ground operations will now continue at Edwards Air Force Base, Calif., where the AF-4 that malfunctioned is assigned, and at Eglin Air Force Base, Fla, and Naval Air Station Patuxent River, Md., Della Vedova said.
“We are in development tests of this airplane. There will be discoveries, we want to find discoveries,” he said. “We want to find and implement fixes to get this airplane flying again. Today was one step down that road.
Auxiliary Power Units - News
The IPP, built by Honeywell International, combines the functions that are performed by an auxiliary power unit, emergency power system and environmental controls. Lockheed Martin Corp. makes the aircraft. All 20 of the Lightning IIs have been parked
including forklifts, backup power units, primary power, and combined heat and power systems. The project will also provide cost analyses of large-scale fuel cell applications ranging from 100 to 250 kW, such as auxiliary power, primary power,
2 (UPI) -- Cyclone Power Technologies and Advent Power Systems will develop a compact 10k auxiliary power unit for the US Army under a $1.4 million contract. The all-fuel capable 10kW APU/genset, to be built on Cyclone's award-winning Rankine cycle
One of these last week suffered a failure of its integrated power package (IPP), which "combines the functions performed by an auxiliary power unit, emergency power system and environmental controls". The force's 150 frontline F-22s, meanwhile,
Allen R. Schaeffer, the director of the Diesel Technology Forum, a trade group, predicted that some big trucks would begin carrying a tiny extra engine called an auxiliary power unit that could run the air-conditioning in the cabin while the truck was
Boeing T-43 Bobcat – Airplanes by Design | Multiply Leadership
This isn’t about the tail, but in relation to the proportions of the fuselage, the 737 tail has always seemed extremely large to me.
Airplanes by Design features photographs of aircraft from a test pilot perspective, highlighting aeronautical engineering characteristics and flight test facts. To see all of the these pictures (and many more of this aircraft and it’s unique design characteristics), click here . You will always be able to access any of these pictures by selecting the Flickr icon in the right sidebar, from (almost) any page.
Click here to read more about this airplane.
RT @: New York Times reports more trucks will start using auxiliary power units to meet new fuel efficiency standards 
New York Times reports more trucks will start using auxiliary power units to meet new fuel efficiency standards 
This weekend, technicians drain and purge the fuel tanks in Endeavour auxiliary power units (APUs), which powered various hydraulic systems
The 2009 Import and Export Market for Parts for Auxiliary Plants Used with Boilers and Parts of Condensers for S... Auxiliary Power Units - Bookshelf
Auxiliary power units
Hydrogen Energy, Economic and Social Challenges
Auxiliary power units Auxiliary power units (APUs) are considered an interesting early application for FCs. Rather than replacing the main internal ...Gas turbine performance
1.9 Auxiliary power units (APUs) Aircraft APUs have normally fulfilled several functions in an aircraft, namely: • Main engine starting • Supply of cooling ...Congressional edition
This generator will furnish the electric power to the freight units and the auxiliary power unit. The turbine will be of the condensing type, and there will ...Aircraft Engine and Auxiliary Power Unit Emissions Testing: Volume 3, Particulate Matter Results
Detailed Information Directory
Auxiliary power unit - Wikipedia, the free encyclopedia
An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large ...
Auxiliary Power Units
We offer a wide selection of Auxiliary Power Units at competitive prices with fast and reliable shipping.
Auxiliary Power Unit
We offer a wide selection of Auxiliary Power Unit at competitive prices with fast and reliable shipping.
Auxiliary power unit: Definition from Answers.com
auxiliary power unit ( ög′zilyərē ′pau̇ər ′yünət ) ( aerospace engineering ) A power unit carried on an aircraft or spacecraft which can be used in
Truck Generators Diesel APU Auxiliary Power Unit - No Idle Law
Auxiliary Power Units for Over the Road Trucks. For More Info call 1 800 931-0552 ... Authorized Service Centers Contact Us FAQ's Savings Testimonials Call for Individual and ...