R. D. Starwalt
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  • Anderson, SC
  • United States
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R. D. Starwalt's Groups

R. D. Starwalt's Discussions

South Carolina UAV source needed - Columbia Area

Started this discussion. Last reply by R. D. Starwalt May 2. 1 Reply

A reporter in Columbia would like a contact person involved in this field. I do not live near Columbia and cannot provide good visuals for a news story. The reporter,…Continue

Tags: HR3514

Listen to Marketplace - March 7, 2013 3DR - interview with Chris Anderson

Started this discussion. Last reply by R. D. Starwalt Mar 7. 1 Reply

If you get it on your local public radio station, listen to today's episode.HERE is the…Continue

Tags: radio, public

Model Aviation online article - 'Rise of the Multicopter'

Started Jan 7 0 Replies

I did a quick search and found this was not mentioned previously...This is an online article about one of our favorite topics:…Continue

Needed - Dead or Afflicted APM2.x for 'repair' instruction methods

Started Nov 14, 2012 0 Replies

The group frequently has questions and requests on how to remove or change a connector on an APM2.x. 3DR does not do rework (almost no manufacturer of any electronic product does this anymore).A…Continue

Tags: header, APM2

 

R. D. Starwalt's Page

Latest Activity

R. D. Starwalt replied to renaud barbier's discussion retractable landing gear
"Patience Renaud. ;) Retracts? I have seen only one example of this and it was a 2008 or so video of someone who added aircraft electric retracts to their quad, operating by a typical channel switch on the TX. APM software, at this time, does not…"
5 hours ago
Derek Vignard replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"yes i use the 3DR module and Multirotor.  "
17 hours ago
R. D. Starwalt replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"This post is more for power connection issues but we do answer other questioins. What is the application for your APM? Heli, Multirotor, Airplane, Rover? How is the APM powered? If 2.5.2, are you using the 3DR Power Module? -=Doug"
yesterday
Derek Vignard replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"hi i dont know if im at the right place but i have a problem with my apm 2.5.2 after a calibration of my remote control nothing works. when i plug the apm to usb the power up i see led red and blue flashing and after only red flashing the tx and rx…"
yesterday
R. D. Starwalt replied to Tony K.'s discussion APM 2.0 wont power up from ESC's, only USB.
"The diode should be checked with no other wiring connected. This ensures (usually) there is no feedback from another path to skew your readings. On the diode scale/setting, you should be reading ohms, not volts. If you have power to the system and…"
Tuesday
R. D. Starwalt replied to Magnus Wake's discussion Bit of a melt down on my arducopter. Anythoughts
"This is good news and I am glad to hear you found something. Mysteries can be fun as long as there is no smoke...or aircraft falling from the sky due to them. Keep us posted for the first flights. -=Doug"
Tuesday
R. D. Starwalt replied to Alex Snyder's discussion First time build and not sure why one motor won't spin
"HERE is the motors test... -=Doug"
Tuesday
R. D. Starwalt replied to Alex Snyder's discussion First time build and not sure why one motor won't spin
"Is there a PDB between the APM and the ESC? If so, recheck the soldering/wiring on the PDB. You can perform a motor test via the CLI of Mission Planner. I will continue to look for the link but it essentially will pulse each motor in sequence. This…"
Tuesday
R. D. Starwalt replied to Tony K.'s discussion APM 2.0 wont power up from ESC's, only USB.
"Sorry to hear of your trouble but as I tell my manager 'This is how people gain experience.' If you are familiar with a schematic, HERE is a simplified power for APM2.0 and HERE is the one for APM2.5.x. You may have damaged the…"
Tuesday
R. D. Starwalt replied to Jean Cyr's discussion Newbiee question
"DSMX is an RF interference reduction scheme rather than an information encoding system. It is becoming difficult to sort out what data applies to what device at times. There is information in the DSMX stream but it could just as well be audio…"
Tuesday
R. D. Starwalt replied to Jean Cyr's discussion Newbiee question
"Tom means to use JP1 and that really depends on what your power scheme requires. What you are describing is not a typical RC RX and yes, the APM wants individual PWM inputs. See THIS page in the Wiki. I use a Spektrum DX6i. 6 Channels is…"
Tuesday
R. D. Starwalt replied to Magnus Wake's discussion Bit of a melt down on my arducopter. Anythoughts
"Nice drawing. A+ +1 on clipping/pulling the Red & Black wires from the Quattro OR just pulling JP1 to isolate the Output 5V from the APM 5V/Vcc section. The APM supplies drive signals and very little current to the Quattro inputs. The…"
Tuesday
R. D. Starwalt replied to Magnus Wake's discussion Bit of a melt down on my arducopter. Anythoughts
"Obviously there was significant current in that wire. It is difficult to see but is that the black (neg) lead that has melted in two locations? My guess, and that the BEC output of the Quattro module served to pump current through the ground of the…"
Monday
R. D. Starwalt replied to jesse haley's discussion begginer
"Jesse, The budget you have set will probably have you building your aircraft to save money. How are your building skills? Do you have tools and other construction resources? There are several fixed wing aircraft that can be made from foam board.…"
Monday
R. D. Starwalt replied to Personal's discussion My First Quadcopter Build
"Looks like you will be having fun with your quad! It will provide much experience and when you are ready, toss the KK2 and go with an APM or other aircraft electronics that are 'aware' of their location. Built it and fly on! -=Doug"
Sunday
R. D. Starwalt replied to Paul Dowling's discussion shorted 5v to ground on reciever input in the group ArduCopter User Group
"If it helps.... wait... TC3 beat me to it! The Eagle files for APM2.0 were pulled from the 3DR store but many of us have them still. -=Doug"
Sunday

Profile Information

About Me:
Certifiable hobby nut regarding electronics, flying things, rolling things, and driving things. ARRL (KB4FEM), SARA (Amateur Radio Astronomy), BSEET (SC State 2010), SLSTP (1994), AMA (79169). I am a field service engineer supporting MRI systems - 34 years experience.
Tell us a bit about your UAV interest
I am interested in amateur science applications of quadrotors and the educational inspiration FPV can provide to school kids.
Hometown:
Anderson, SC

R. D. Starwalt's Photos

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R. D. Starwalt's Blog

Voltage and Current monitoring for a South Carolina Arducopter

Posted on September 30, 2012 at 12:24pm 13 Comments

 

Using EC3 connections on my quad was a good idea...except when it applied to the AttoPilot 90A sensor from SparkFun. The goal for adding this sensor to the system was to be able to remove it cleanly if needed. The sensor pcb design was…

Continue

Now I can time (approximately) flights of a South Carolina Arducopter

Posted on September 6, 2012 at 5:55pm 4 Comments

 

It took me a little while to learn what most of the switches and buttons on my DX6i could do. This past weekend the Trainer switch was assigned to start the timer in a count up mode.

Behold!

With my EFlite 30C 11.1V 3200 mAh battery almost 7 minutes of mostly hovering flight was achieved (no…

Continue

A noob South Carolina Arducotper Builder/Pilot does Outreach

Posted on August 25, 2012 at 5:30pm 3 Comments

 

It was a fair certainty that Chris Anderson couldn't make it on August 23 to the local radio club and discuss the state of the art of DIY drone technology. On the other hand, he would have raised many smiles at the thought of attending the Anderson…

Continue

Adding an Arming Plug and a Camera mount to a South Carolina Arducopter

Posted on August 21, 2012 at 6:15pm 7 Comments

 

It was a busy weekend. One of my earliest concerns with this project was the lack of an ON/OFF switch that could handle the current of the system and that would not look like something from an old junk box. I wanted it to be easy to use, easy to access (translate: no where near the propellors), and completely…

Continue

Comment Wall (11 comments)

At 8:37am on May 13, 2012, Carl La France said…

Quit a project you have going!  I never seen one of them fly in real life. you are right into it.After a while it becomes an extension of your self "Good Job!

" Education"  begins the moment you are born and never ends ."" The shortest pencil is better than the longest memory" I was always a believer in the 3 book theory ! You read one book on a related subject by a particular Author you are a Clone ! You read a second book  on the same subject by another Author  you can see a difference !You read the third book on the same subject by a different Author  You can formulate your own Decisions ! The guy that wrote the first book doesn't know what he is talking about and if you only read one book you are a Clone.

Since I am from the "Old School "  I learn by mistake! I do every thing twice . I just get right into it doing it wrong the first time  which is good practice so I can do it right the second time ! have a good day

Carl

At 12:38pm on May 13, 2012, Carl La France said…

You have a lot of experience in RC I never seen mini servos before the Radian Pro  I got a special on regular size servos from planes from the past  We put everything inside back then and they flew well . I like the way you sketch things out taking advantage of the  space available my radio is a 6 Di by using one servo for the ailerons I free up the aux channel for the camera The work you do looks quality ! have a good day!

 Carl

At 7:15pm on May 17, 2012, Carl La France said…

R .D. go to my page and check out my posted photos ! I am going to try and get the wing together this week end . You are working with new to me technology On your Quadro rotor how do you sinc  each motor to run at the same rpm ? I t must be a pretty good balance to get it to hoover stationary it looks pretty big how far is it across ?when you are 20 feet away how can you tell the front from the back?have a good day!

Carl

At 9:00pm on May 18, 2012, Carl La France said…

R.D. I have a quad on my real flight simulator and I can't even begin to control it after looking at your pictures of the inside of the Nova  I like the way you routered out the foam and made a basket for the servos . pretty precision stuff. Impressive  you might be working to closer tolerances than me because of the stuff you want to put in and the room you have  available. I jigged up and laid up the ribs for the wing on my drone today  my buddy has a ping pong table in his garage that belongs to his son he never uses it it has become a work bench I screwed the jig to the table to keep the wing straight From the drawing to cutting the pieces to laying it up is quite a change  after looking at it full scale it is kind of "High aspect ratio "  There is a lot of pieces and it took all day I c/a ed my fingers together many times at one point  when I was about half done I thought  "Why am I doing this? I am old I should be sitting on a bench in a park some where enjoying the weather watching people walk their dog then pick their dogs crap up and put it in plastic bags!" I will get my son to take a picture of the wing over the weekend and Post You have a good day! Carl

At 2:05am on May 23, 2012, Carl La France said…

R.D Do you have any experience with pusher prop stall and spin recovery where the motor is right on the tail? I am concerned Gyroscopic procession might make it impossible to recover if I put the motor there  Thanks Carl

At 6:52pm on May 24, 2012, Carl La France said…

I didn't read any thing on it I was going from practice experience in a  large plane .Spin Recovery Verify ailerons are centered , opposite rudder to stop the spin elevator forward to break the stall  pull out of the ensuing dive altitude loss  150 to 700 feet depending on the skill of the pilot . I don't know about a rear engine plane ? Just guessing in a full scale drone like the raptor that is rear engine since they are not in the plane they probably need 500 feet to stop the spin and another 400 feet to pull out of the dive

My concern is if I build a rear engine
RC plane and I only have 100 feet of altitude and if it goes in to a spin if I would be able to pull out or would the torque from the motor make it impossible to fly out of it? and increase the spin rate? right now I am looking at all the options as to where to put the motor other than on the nose Thanks Carl

At 5:22pm on June 4, 2012, Carl La France said…

R.D. Thanks for your comment I have been including the drawings with my posts as I make them up If any body wanted to make their own they could I am inventing as I go along same as you with your Quadro rotor One of the reasons I have an aluminum tail With the Spirit glider I have  the tail broke nearly every time I flew it You have a great Day! Carl

At 7:39pm on June 21, 2012, Carl La France said…

R.D. I left a comment for Robert Pigeon on his comment wall with some pictures check it out he means well and is a good guy .I am rebuilding for the EDF wait till you see my next post next week!

At 7:03pm on July 10, 2012, Carl La France said…

Bam! and they walked away Thanks R.D,

At 11:15am on September 22, 2012, John Githens said…

Doug,  (I am still adjusting to the design of the DIY Drones site... not the best from my experience with wikis and blogs.)  Below is a reply to your comment. Not sure if you would have received an alert that I left one in the other location.

Thanks for the offer and the tip about keeping a log sheet. I bought this charger from progressiverc because of some favorable blog mentions (and they are conveniently located in the basement of a house a few miles away from our home). Based on meeting those guys, I have a high trust for their advice and products. Haven't looked at these pages. I am about to *carefully* charge my first lipos with a charging bag.

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