-
Doug Weibel
- Male
- Longmont, CO
- United States
- Blog Posts (24)
- Discussions (832)
- Groups (2)
- Photos (1)
- Photo Albums
- Videos (1)
Doug Weibel's Discussions
APMega - 1.0.1 alpha now in the repository
Started this discussion. Last reply by Uwe Gartmann Aug 16, 2010. 19 Replies 0 Likes
ArduPilot Firmware Version 2.6
Started this discussion. Last reply by Ground Loop Oct 8, 2010. 244 Replies 0 Likes
SuperStar EP Power System questions
Started this discussion. Last reply by Doug Weibel Aug 6, 2009. 3 Replies 0 Likes
Doug Weibel's Page
Latest Activity
Profile Information
- About Me:
- Full scale plane and sailplane pilot
RC heli pilot
Ex-engineer, tinkerer
Doug Weibel's Photos
Doug Weibel's Videos
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FTDI2_2
Added by Doug Weibel 8 Comments 0 Likes
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Doug Weibel's Blog
Difficulty with using Ultrasonic Ranging (Sonar) for landing flare control.
Posted on January 29, 2012 at 1:30pm 48 Comments 4 Likes
A feature frequently requested is to add support to ArduPlane for using sonar to control the landing flare.The answer, unfortunately, is probably no. Take a look at this graph I obtained yesterday...
This has been on my to-do list for ages as I have never gotten around to getting some real world…
Continue Annual Public Service Announcement
Posted on October 31, 2011 at 8:51am 5 Comments 3 Likes
We have had our first snow storm here in Colorado, and the furnaces are definitely running, so it seems like a good time for my annual ESD Public Service Announcement.
What is ESD? Electrostatic Discharge! That little spark you sometimes get when you touch a light switch or some other grounded object.…
Continue Test flight using new Auto Flap feature
Posted on October 6, 2011 at 12:18pm 12 Comments 7 Likes
I had an excellent test flight with the new Auto Flap feature this morning.
This picture is the end of a fully autonomous flight. Sorry, I should have had video running.... It is impressive that the Skywalker is sitting within about a meter of the center of the runway. However, what is…
Continue APM automatic flap deployment ready for testing.
Posted on August 27, 2011 at 5:08pm 5 Comments 7 Likes
I have uploaded a new revision of APM to the trunk repository (r3665) with automatic flap functionality. I am really pressed for time so am hoping some community members can do some flight testing on it and report back.
Flap functionality can be assigned to channel 5 or 6, using the…
Continue APM now supports Differential Ailerons
Posted on August 21, 2011 at 3:31pm 25 Comments 8 Likes
Sometimes APM development goes fast, and sometimes it goes like molasses in winter. After being asked repeatedly (over many months - sorry) I have finally gotten support for multiple aileron channels in place. You can use this if you want to set your airframe up with differential ailerons or…
Comment Wall (13 comments)
- At 8:57am on October 22, 2009,
Greg Gibbons said… - Doug, please send your debugged IMU code, and let me know what to fix in Labview, I have 8.6 Pro Dev Suite. I noticed your in Longmont, I live in Windsor CO. We should get together and fly, I have been developing an autopilot and Ground control station for about 5 years.
Thanks
greggibbons@comcast.net
Greg Gibbons
- At 4:08pm on October 22, 2009,
automatik said… - Hi Doug,
I would like a copy of revised ArduIMU code. I'll add you as a friend here in order to send you my emaill addy....As for LabVIEW code, i think there was a mixup between Z and indicators (if memory serves me right) and I remember seeing one more thing...
- At 8:13pm on October 22, 2009,
Dan Wilson said…
- Doug,
I would like to have a look at your IMU code.
Do your subtle changes greatly affect performance?
I have recently been flight testing the algorithm in my own application. With Jordis gains I noticed pitch estimate problems at full throttle due to what I assume was engine vibration affecting the accelerometers. I turned down the gains to about 30% what they were and it seems to have remedied the problem.
Dan
dan.wilson00@gmail.com
- At 3:25pm on December 4, 2009,
William Premerlani said… - Hi Doug,
You asked:
"Hi Bill,
We (some of us in the ArduIMU community) are having a friendly disagreement over what positive acceleration means relative to a reference frame. I'm afraid none of us may know the correct convention. If you have an IMU sitting on your desk and you begin to move it in the positive X coordinate direction, while you are accelerating it is that a positive or negative acceleration from the IMU’s perspective?"
The short answer is that many accelerometers, such as the MMA7260 that I use in the UAV DevBoard, actually measure gravity MINUS acceleration. So, in the case that you cite, the acceleration is positive, so the accelerometer will give you a negative output.
Best regards,
Bill
- At 4:18pm on December 7, 2009,
Danilo Marques Figueiredo said… - Hi Doug,
Did your arduIMU works fine with your ardupilot?!
My project is walking and I'm thinking to replace the thermopiles with arduIMU, Is it complicated to do it?!
Regards,
Danilo.
- At 10:52pm on December 7, 2009,
Gary Mortimer said…
- Hey Doug messaging is down so I shall have to try here, unfortunately there's lots of rip off's of the original Vtail, if its from the USA that's what it will be. There are flat spars in the original about 6mm wide that are placed in the slot that runs on the underside of the wing for that purpose, also the from of the fins also receive the same treatment thats to stop them flexing. For hinging simply use some UHUpor and run two beads of it on each surface wait for it to dry and then bring together. Works really well. Please don't hesitate to ask any more questions, although as I say most being sold in the USA are not from the designer sadly!! Hooray for China, actually another country in this case, but the less said!
- At 7:56am on December 17, 2009,
john bero said… - Yes, it has four flights on it. It was a challenge to keep it under 6#. Came in @ 6.01#.
The first flight was good, had issues with take-off due to the high location of the motor and poor angle of attack with the wing. Even with this it performed quite well. Have a video of first flight. It is a heavy plane for its size; however it is very stable after the two issues were taken on with a small amt. of tinkering. I think I want to build a larger one, but foam wing is the way to go, coroplast is just too heavy for anything larger than this.
- At 8:24am on December 17, 2009,
john bero said…
- Wild-thing specs.
48” wing span
11” cord
1” ailerons
48” length overall
36” X .75” alum. Channel
5 servo’s (slave for steering)
Basswood saddle for servos
.125 OD music wire (landing gear)
2.25” wheels
Landing gear offset 1.5” for camera clearance
Monsterpower 32 out-runner kv 770
11 X 7 prop
14.8 lipo four cell
80 amp esc
6 channel receiver
2” gutter pipe
Walmart paint ball magazine (motor housing)
Soda straws
.5” poly urethane firewall (Wal-Mart cutting board)
Yellow monocoat.
Misc. nylon screws, nylon spacers, glue, Velcro, etc
- At 6:29pm on March 11, 2010,
William Premerlani said…
- Doug,
I am responding to your comment about putting a plane through a windshield. Its a bit off topic, so I am putting it here.
The guy who runs the local hobby shop in my town, Daryl, sold a plane to someone. Daryl drove out to the field on the day the customer took the plane up for its first flight.
Shortly after Daryl got there, the plane went out of control, busted through Daryl's windshield, and landed in the front seat of Daryl's car. Guess he lost money on that sale.
There is a picture of the plane, taken looking through the hole in the windshield, that is up in Daryl's shop, with the caption, "shit happens".
Daryl says there is no way to know for sure what happened, but his guess is that the crystal shook loose from the receiver.
Bill
- At 8:26am on June 29, 2010,
Dave Whittington said… - Doug,
A couple of things
1. I should be able to understand the code as necessary
2. I don't have ailerons - only rudder - but it turns very well as is
3. I only have a DX6i transmitter, so I will only be able to test MANUAL/other mode - one at a time.
4. I do have a gumstick video camera to record the flight along with the flash log
5. I will take my laptop along as necessary to download various versions - but I can't run the ground station as I didn't get telemetry hardware.
6. I will probably fly out slightly over the ocean - see http://vimeo.com/10569804 - but how close can my waypoints be for a figure eight ( I want to keep it in tight and over the beach).
Dave Whittington
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