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RAF Fighter Flies On Printed Parts
Rambo Tribble writes "In what is being touted as a milestone, Royal Air Force Tornado GR4 fighter jets have flown with 3-D printed parts. The announcement came from defense company BAE Systems, and it depicts the program as a model for cost-saving. From the article: 'The parts include protective covers for cockpit radios and guards for power take-off shafts. It is hoped the technology could cut the RAF's maintenance and service bill by over £1.2m over the next four years.'"
... but we're only free from the contractors if we specify that we need the CAD files for the individual components as part of the initial production contract.
On demand part printing is very cool, but it's kind of a yawn until they fly an entirely 3D printed plane.
Occasionally living proof of the Ballmer peak.
The main cost here is spare parts storage - something you need to have anyway. Replacting some storage space with a very expencive 3D printer (you really thought they want to use a 300$ one? think again) makes no sense, you get lower quality parts and making them takes longer than it would take for you to get the parts from storage.
The military is considering the logistics of access to storage in a battle. It may be considerably cheaper to take a 3D printer and some material to the front than backups of all your parts. I recall reading somewhere that warships tended to carry 3 replacement parts for everything. Since you never know what's going to break you have to carry much more than necessary. A 3D printer should require much less mass and storage since you only need material for the things that actually break, instead of material for everything that might break. The costs of moving backup lenses in hundreds of styles around a battlefield may make 3D printing them more economically viable.