Bryan Cuervo's Blog (10)

Pushing the UAV DevBoard to the limits

Tailless & Wingletless from Bryan Cuervo on Vimeo.

In one more attempt to test the abilities and push the limits of Bill's UAV DevBoard, I removed the winglets from my tailless design so now there are no horizontal or vertical stabilizers.

The video is in three segments; the first showing manual flight with stabilization disengaged. You can see the… Continue

Added by Bryan Cuervo on November 18, 2009 at 6:06pm — 9 Comments

The UAV DevBoard and latest firmware in action

Showing off Bill and Ben's excellent firmware in the UAV DevBoard----

The compete story is here.

Complete Waypoint Circuit from Bryan Cuervo on…


Added by Bryan Cuervo on November 7, 2009 at 3:44am — 10 Comments

Flight tests with the UAV DevBoard

After my last UAV project went up in flames (literally!) I’ve shifted gears and designed a dedicated autopilot (AP) test vehicle. She is a tailless plane with removable wings for transportation and has plenty of room in the fuselage with easy access.

For the autopilot, I’m using Bill’s UAV DevBoard with a modified AileronAssist code for handling the elevons. This modification is a work in… Continue

Added by Bryan Cuervo on October 4, 2009 at 4:00pm — 116 Comments

Flight Tests With the EG 2.2

I’ve started flight tests with the latest Ardupilot code and hardware and will post my findings in this blog post. Info on my plane and set up can be found HERE. I’ve found the EG 2.2 has similar flight characteristics to the original EasyGlider including the same “reverse roll” and “reverse pitch” settings in the code so these results should help anyone flying the stock glider.

A few notes on what I… Continue

Added by Bryan Cuervo on July 14, 2009 at 4:02am — 31 Comments

Ardupilot Success Stories

At this point, the only way to get my plane flying with Ardupilot is to buy a different FTDI cable which may or may not work with my setup(I don’t have the programming skills to bypass the configuration utility and add waypoints directly into the code). I’m running Windows Vista on my laptop and have the latest Ardupilot board with the shield kit as shown below. I’ve also installed the latest code, configuration utility and the newest version of the Arduino IDE.

Before I invest any more… Continue

Added by Bryan Cuervo on June 30, 2009 at 6:30pm — 11 Comments

Pros and cons of the Ardupilot Configuration Utility

I first started flying with Ardupilot before the configuration utility (CU) was created. At the field, I’d pull up the Arduino IDE on my lap top, make the changes I wanted in the code (waypoints, altitude, tuning parameters, etc.), upload to my Ardupilot, then fly. After seeing how the flight was affected, I’d go back to the IDE make another change and fly again.

Then the CU was created and it looked cool but, at the field, it just created another step to go through before flying. I now… Continue

Added by Bryan Cuervo on June 29, 2009 at 4:24am — 29 Comments

Mega Easy Glider Mod for Ardupilot 2.2

This is my latest modification of the EasyGlider to coincide with the official release of Ardupilot 2.2.

I call her the “EG 2.2”. The last modification, found here,

involved increasing the fuselage volume but this is a little more ambitious and includes standard tail conversion to an inverted V-tail, moving the motor to the rear in a pusher configuration, moving all servos to the control surfaces and… Continue

Added by Bryan Cuervo on June 15, 2009 at 3:30pm — 32 Comments

Recent modifications to the EasyGlider

There has been some recent interest in using the EasyGlider as a flying platform so I've included some updated pictures. Space was increased beneath the canopy by removing the rudder servo since it's not being used and grinding/cutting into the right fuselage wall. This area was reinforced with fiberglass and the increased space allowed addition of the EagleTree datalogger and extra GPS. The rudder is now locked in place by the horn and a piece of balsa glued to the vertical fin.…


Added by Bryan Cuervo on May 16, 2009 at 8:22am — 3 Comments

Flight tests with ArduPilot in EasyGlider Pro

I posted an earlier blog with pictures on how I placed the avionics in an EasyGlider Pro for autonomous flight. I found out that was the easy part! Now I’m performing flight tests to hone in on the code mods for stable flight ( as Jordi states, the latest code is optimized for the EasyStar). My method has been:

Fly and observe performance in autonomous mode – record observations – make code modifications on laptop – remove GPS and upload code – replace GPS – fly again. Laborious but also… Continue

Added by Bryan Cuervo on April 12, 2009 at 8:46am — 53 Comments

My Easyglider Pro Conversion

I chose the Easyglider for its size, high L/D and ease of modification/construction with Elapor foam. There is plenty of room to slide in up to a 3000mAh Lipo pack under the wing but, as Chris has mentioned, there isn't a lot of room under the canopy. I modified the canopy with a tab in the front and magnet aft for attachment. The original, forward canopy hold down tabs were left off and it turned out ArduPilot was almost a perfect fit in their place (see pictures).

Just waiting for… Continue

Added by Bryan Cuervo on March 28, 2009 at 12:17pm — 8 Comments

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