3D printing guns is one thing, but 3D printing railguns that can fire metal projectiles at 250 meters per second is quite another, none of which stopped this creator from making his video game dreams a physical reality. While it may look like a geeky dress-up accessory you would not even notice at a comic convention, this is the real deal.

The weapon in question has six capacitors weighing 20 pounds and providing 1,800 joules of energy per round. Parallel electrodes fire an armature bullet while an Arduino Uno R3 monitors charging levels and temperature.

3D CAD drawings show how the thing was designed and built and test fires show the contraption denting steel and plywood. The projectiles do not survive the mission.

You can see more bits and pieces of the construction process and components in this image gallery. If you ask really nicely, its maker may even let you sneak a peek at his construction documents or build instructions.

The post DIY Handheld 3D-Printed Rail Gun Fires Shots at 560 MPH first appeared on Gajitz.

Each year, over 25 billion trees are logged or burned, but only 15 billion are planted – addressing this unsustainable shortfall, a drone startup is working toward an initial goal of aerially planting 1 billion seeds per year.

Biocarbon Engineering‘s approach involves mapping the geography of target areas, assessing their needs and conditions, then shooting soil-penetrating seed pods directly into the ground below from around 5 to 10 feet above. Already germinated and encased in a nutrient-rich gel, the seeds can be shot at a rate of 10 per second and, with multiple drones, could put 36,000 trees in the ground each day for about 15% of the cost of conventional planting methods.

One of the group’s founders is a 20-year NASA veteran who knows the stakes and understands the technological needs of this ambitious plan. The group aims to work with global non-profits and forestry services to deploy their solution around the world, mapping, planting and monitoring the results for further interventions.

From the company: “Destruction of global forests from lumber, mining, agriculture, and urban expansion destroys 26 billion trees each year. We believe that this industrial scale deforestation is best combated using the latest automation technologies. We use emerging technologies to deliver precision planting and mapping to increase the uptake rates and the likelihood of healthy forest development.”

“There are a variety of tree-planting techniques, including planting by hand and delivering dry seeds by air. However, hand-planting is slow and expensive, and spreading dry seeds results in low uptake rates. Our solution balances these two methods. First, by planting germinated seeds using precision agriculture techniques, we increase uptake rates. Second, our scalable, automated technology significantly reduces the manpower requirements and costs. Finally, our mapping UAVs will also provide invaluable intelligence on planting patterns, landscape design and appropriate timing.”

The post Seed Startup Aims to Plant 1 Billion Trees a Year by Drone first appeared on Gajitz.