All Blog Posts (13,282)

Building a UAV for photo mapping - Kit Mods

First I must thank Jeffrey Johnson who posted a set of images of the Cularis he is building for photo mapping. He has made a really neat modification by moving the rudder and elevator servos from the stock

position in the cockpit, to tail mounting…


Added by Paul Gregory on December 26, 2007 at 2:24am — No Comments

Building a UAV for photo mapping - Autopilot

Ahh!! CRASH and BURN!!

I had planned to use the Pico-Pilot and Pico-GPS for the autopilot in my UAV, but I have now discovered that since Jan 2007, they have been classed as MILITARY technology and are controlled by US Export License regulations. Specifically the regulations cover,…


Added by Paul Gregory on December 23, 2007 at 8:20am — 8 Comments

3D Robotics
The difference between our autopilots and those of the pros

What do you get for the hundreds of thousands or millions of dollars cost difference between our UAVs and those of the pros? Well, a lot (even after you take out defense contractor markups). Ours are one-offs that need a lot of hand tweaking, care and knowledge to use. They have limited range and altitude, and as we know all too well, sometimes they don't… Continue

Added by Chris Anderson on December 22, 2007 at 11:00pm — 5 Comments

Building a UAV for photo mapping - Packing it all in

The first image shows the recommended distribution of components for the electric version of the Cularis. (Click for higher resolution). In this configuration, the plane balances at the CGO with 3 weights (supplied in the kit) fixed under the tail plane. The component weight…


Added by Paul Gregory on December 22, 2007 at 11:30am — 11 Comments

washington state DOT demo hwy 20,Washington pass

our bird the A-3

yamaha R-MAX flown by georgia tech…


Added by wayne garris on December 21, 2007 at 8:22pm — 2 Comments

some ap pics

taken with 7mgp camera and own design foamy

marymoor rc park

sweet uav…


Added by wayne garris on December 21, 2007 at 8:14pm — No Comments

Building a UAV for photo mapping - Camera Selection

I have bought a Pentax Optio A30 to use as my aerial camera. It is similar to a number of the latest generation of sub-compact 10Mpixel cameras and has good reviews, especially in terms of its image quality. It weighs about 160gm with battery and SD memory card and at 58mm, has one of the smallest widths I have found – important for fitting

into the Cularis…


Added by Paul Gregory on December 21, 2007 at 9:30am — 8 Comments

Building a UAV for photo mapping - The Goal


My name is Paul Gregory and I read about this site in the Economist article. As I now live on a small wine and olive farm

in Italy, the idea of building a UAV to produce high resolution aerial

photographs of the surrounding area seems not just great fun but also

very useful. I have been researching and reading a lot over the last

month and as I am now ready to start my project, it seems time to share

my ideas and progress. Hopefully your…

Added by Paul Gregory on December 20, 2007 at 11:30am — 4 Comments

3D Robotics
UAV seaplane recharges while floating for longer missions

The University of Michigan is working on a very interesting 7ft-wingspan electric UAV that is designed to decide for itself whether to float or fly. It's shown here with the electronics of an ocean buoy with which it can interact. It's modeled… Continue

Added by Chris Anderson on December 19, 2007 at 1:28pm — 1 Comment

3D Robotics
Basic Stamp Autopilot Tutorial Series

This is the front page of the multpart tutorial series that teaches you how to build and test the Basic Stamp Autopilot used in GeoCrawler 3.


Added by Chris Anderson on December 18, 2007 at 1:00pm — 1 Comment

3D Robotics
UAV use skyrocketing

The latest stats out of the Pentagon show that UAV (or UAS--unmanned aerial systems--as they're known in the miltary) flight time is rising faster than ever. It climbed from 160,000 hours in 2006 to an estimated 250,000 this year--up 56%.

And with that has come increased spending, from $400 million in 2002 to more than $2 billion next year to an… Continue

Added by Chris Anderson on December 18, 2007 at 7:05am — No Comments

NASA's new autopilot system

NASA is developing a navigation system that augments GPS signals via a satellite phone network so that it works around the globe, beyond the limited implementation of WAAS. Their intended application is a UAV based mapping function utilizing synthetic aperture radar technology which requires a highly stable and accurate platform.

For testing purposes they will mount the radar and navigation system on a Gulfstream III (I especially like this part), "Since the Gulfstream III operates…


Added by T-Rex on December 14, 2007 at 1:09pm — No Comments

3D Robotics
Global Hawk first impressions

Well, both Global Hawk models I wrote about the other day arrived, and I've just had time to open the boxes and quickly look them over. But four things are already clear:

  1. They're basically the same model, from Haoye Models.

  2. The…

Added by Chris Anderson on December 13, 2007 at 3:27am — No Comments

3D Robotics
LEGO autopilot code updated

Just a quick note to say that I've updated the code to both the GPS-based Lego autopilot and the compass-based Lego autopilot. The only major change is that the motor functions are more effecient and reliable. The old code reset the motor encoder with each turn and this was leading to some pretty serious drift after just a few turns. The new code uses a proportional turn algorithm that is not only more flexible but also eliminates drift. …


Added by Chris Anderson on December 12, 2007 at 11:44pm — 3 Comments

Matching powertrain components to suit requirements (

Since I started flying r/c airplanes in the mid 70s when I was in high school I always wondered about the selection of propellers and glow engines for a particular airframe.

After a long break from r/c, I built a couple of electric powered models in 2000. Neither model flew more than 20 feet off a hand launch until, after trial and error, I found correct combinations of propellers, gearboxes, motors and batteries.

Not happy with the trial and error method, I wrote analysis… Continue

Added by James Canova on December 11, 2007 at 3:08pm — 2 Comments

3D Robotics
My white paper on the best platform for an indoor UAV contest

[UPDATED: paper is finished and available below]

I've put together a technical assessment white paper for the FIRST robotics league, proposing an indoor aerial robotics contest for 12-17 year old kids (and coaches). Target price is under $1,000 and safety is of prime importance. This paper lists the possible platforms--microplanes, helis,…


Added by Chris Anderson on December 10, 2007 at 4:07pm — 3 Comments

3D Robotics
Keep those Google ads or lose them?

Speaking of redesigns, I'd like your opinion on whether to keep those Google ads at the right. I don't make any money from them (the revenues go to Ning, our social network hosting service, but I'm a premium member so I can turn them off), but I have to admit that I think it's kind of interesting to see what the Google relevancy machine turns up. I've even clicked on a few! But this is a community site, so I'll go with the majority view.

Like 'em or Lose 'em? Vote… Continue

Added by Chris Anderson on December 9, 2007 at 12:45am — 3 Comments

3D Robotics
Updated GeoCrawler 1-5 instructions

Just a quick note to say that I've updated all the instructions to GeoCrawlers 1-5 (and changed the numbering, so they now start with the Lego UAV). Some changed a little, and some changed a lot, but all reflect improvements and lessons learned since the original designs. If you're building any of these, check the instructions again. Also, we have a site redesign coming, so if you have any suggestions for additions or subtractions, now's the time (in the comments, please)

Added by Chris Anderson on December 9, 2007 at 12:11am — No Comments

3D Robotics
Auto-stabilized camera mount 2.0: better, cheaper, faster!

I spent a few hours yesterday trying to perfect the gyro-stabilized camera (shown) in preparation for a test flight today. But even when I tweaked the settings it wouldn't take long before the gyro lost track of where "down" was and it ended up with the camera assembly at… Continue

Added by Chris Anderson on December 8, 2007 at 5:10am — 18 Comments

3D Robotics
UAV report: Tel Aviv

For UAV geeks, Israel really is the promised land. No country is more advanced in the use of UAVs, small and large, and the second Lebanon war was a state-of-the-art example of ubiquitous eye-in-the-sky presence. I'm in Tel Aviv today, and I took the opportunity to hang out with the best of the bunch. Here's a brief report.

The picture at right… Continue

Added by Chris Anderson on December 6, 2007 at 4:43pm — 4 Comments

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