Army Develops Lightweight, Fuel-Efficient Electricity Generator
The Army has designed and is testing a 100kW generator that is 1.5 tons lighter than those currently being used, which allows it to be towed by a Humvee. A hybrid electronic architecture and variable engine could reduce fuel consumption by 20 percent. (Source: US Army)
Bad design adds weight. Nor do modern engines have a problem properly set up going deep off road. Problem here is just your kind of thinking that it has to be heavy to be rugged.
The same problem in cars, we don't do lightweight, just cut a pound here and there and pats each other on the back about how good they have done when cutting weight 50% just isn't that hard with composites. But it's not what they do.
When I started sailing everone said how dangerous and terrible sailing qualities multihull sailboats were until I sailed a couple and they were great leaving the monohulls in the dust both up and downwind. After that I just ignored a lot of experts and just looked at facts showed me the error of following the crowd when it's wrong.
Jerry, as William alluded to in his post, the cause of the weight is its ruggedness. For a miliatry application this would go way beyond what you would expect for commercial or industrial applications. It's not just off-road. It's WAY off-road and pretty much needs to be built for, or have add-ons for, the most extreme environments imaginable. All of this adds weight.
I had a similar thought when looking at the description and the picture. I like the variable speeds and load following features, as well as the towable off-road ruggedness. It looks like a good candidate for mountain living.
The challenge of any generator system is not just in making it lightweight and efficient, but more in making it durable and reliable. The abuse of being hauled off road must be seen to be understood. And the abuse suffered while "running under fire" is a lot worse than that. IT would be interesting to see another photo of that system package after one mile off-road at 45 MPH.
The sad reality is that, just like race cars, reliability is vital, and a broken generator is not very useful. And unfortunately, most of the time durability equates to more weight.
The question is why it even weighs a ton much less saving 1.5tons!!?
A 150HP alum diesel, a 3ph 100kw alt/ ACProulsion EV motor/ inverter and a 10kwhr, 200kw peak A123 Litium battery pack would weight 1200lbs and use 50% or less fuel using stock componants on am alum or composite skid/casing available 15 yrs ago or more except the batteries .
The first thing that caught my eye in the image attached to the article was the use of modular aluminum extruded structual members. While these are perfect for a prototype, one has to think about how much they contribute to the 1.5 ton weight savings. Would a production generator of this design use aluminum for its support structure (Not just modular elements as shown, but purpose-built structure)?
We searched far and wide for the top employers for engineers. These companies were ranked by engineering professionals, engineering students, and engineering instructors and professors. Does your employer make the grade?
While every company might have their own solution for PLM, Aras Innovator 10 intends to make PLM easier for all company sizes through its customization. The program is also not resource intensive, which allows it to be appropriated for any use. Some have even linked it to the Raspberry Pi.
Using a 3D printer, CNC router, and existing powertrain components, a team of engineers is building an electric car from scratch on the floor of the International Manufacturing Technology Show in Chicago this week.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.