R. D. Starwalt
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  • Anderson, SC
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R. D. Starwalt's Discussions

Wanted: Dead/Busted GoPro - any model

Started this discussion. Last reply by R. D. Starwalt Feb 4. 2 Replies

Did you:Pile your aircraft in from 300 ft?Hit a tree/pole?Drop in in the parking lot?2 year old toss it like a baseball against a brick wall?Regardless, I would like one (or a couple) to investigate…Continue

Tags: GoPro

For $99, be a part of the growing 'Drone Industrial Complex'

Started this discussion. Last reply by Andre K. Jan 20. 1 Reply

With a name like this, who couldn't make millions in the growing drone business?…Continue

Tags: names, domain, ebay

Shame it is not April 1 -- All our FAA fears could be over with this idea

Started this discussion. Last reply by Gary McCray Dec 25, 2013. 5 Replies

I am amazed at the ingenuity of THIS device.MX-X1 FAA…Continue

Tags: scam

A More Simplified APM2.5.x 5V/Vcc Schematic

Started this discussion. Last reply by Hein du Plessis Jun 13, 2013. 5 Replies

Target Audience: Readers who do not have Eagle or are confused about using it.You Need: Basic electronic schematic reading abilityIt was time for an update and simplification!…Continue

Tags: Module, Power, Vcc, 5V


R. D. Starwalt's Page

Latest Activity

R. D. Starwalt commented on Jeremy Guillory's blog post Water-jetting Hexacopter frames out of Lexan
"Nice work! The original Arducopter used clear plastics for airframe pieces though I am not sure if Lexan (GE ->SABIC material) was used or another polycarbonate. It may have even been acrylic. The plus side is of this construction method is parts…"
19 hours ago
R. D. Starwalt commented on Chris Anderson's blog post Analysis of FAA appeal in the Trappy case: Agency created its own problems
"Euan -- LOL! If I had a new APC 10 x 4 prop set for every time my name was pronounced that way, I could bust all the props on all my quads every week and still not run out of spares.  I also apologize to the international community for…"
R. D. Starwalt commented on Chris Anderson's blog post Analysis of FAA appeal in the Trappy case: Agency created its own problems
"+1 David T... and don't forget the webinar that the AMA hosted a couple weeks ago with the guys from the Roswell Flight Test Crew giving their presentation of FPV. I watched/participated and found it very professional and well done but,…"
R. D. Starwalt replied to Martin Brousseau-Kiel's discussion My dad wants me to build a drone, what should I build?!
"I recommend obtaining the back issue of Make Magazine on Drones, Issue 37 That will give you something to hold while you collect parts, etc for the project. If you are looking only for direct control electronics (RC only), you would not need…"
R. D. Starwalt commented on Chris Anderson's blog post Analysis of FAA appeal in the Trappy case: Agency created its own problems
"No one is going to be required to join the AMA just like no amateur radio operators are required to join the ARRL. The ARRL is recognized as a community based organization by the FCC. They lobbied for that just like the AMA did with the FAA. Some…"
R. D. Starwalt commented on Chris Anderson's blog post Analysis of FAA appeal in the Trappy case: Agency created its own problems
"To plow over this ground again... Congress and the President essentially put the FAA on a timeline with P.L. 112-95. The M.O.U. between the FAA and the AMA was another aspect of P.L. 112-95 in that the AMA is a organization recognised by the…"
R. D. Starwalt replied to Nolan Crook's discussion Blown Fuse (F1) on 2.6 - Board won't power up at all - HELP!
"That is a mystery part.. I turned off multiple layers in the Eagle file for  2.5.2 and cannot find that part. F1 is there. So is the USB connection, the pads for the connector rails right of the USB but, nothing where I have put the green…"
R. D. Starwalt replied to Nolan Crook's discussion Blown Fuse (F1) on 2.6 - Board won't power up at all - HELP!
"Yes, you definitely are learning about electronic failure points. Something was definitely awry to cause the smoke to get out of that part...which I cannot find on the Eagle drawing either. My gut response is that it is a capacitor, shorted, and…"
R. D. Starwalt commented on MikeA's blog post For all the Techpod lovers and supporters
"'Measure everything twice, cut it once' is an old saying. Sometimes other things go wrong. Last weekend I was helping a fellow modeller with a taxi pre-maiden flight. The model is a DH Beaver ARF. I think it needs a steerable tail wheel,…"
Apr 6
R. D. Starwalt commented on Gary Mortimer's blog post Change Agents: Chris Anderson's drone dream takes flight
""There's a great future in drones. Think about it." -=Doug"
Mar 26
R. D. Starwalt commented on Gary Mortimer's blog post Change Agents: Chris Anderson's drone dream takes flight
"Today's 'something' I learned: Chris Anderson worked in particle physics research. Yesterday I did not know that. I will have to discuss this with my Theoretical Physics buddy.... seriously. He says I should be working in the…"
Mar 26
R. D. Starwalt commented on Mark Harrison's blog post As a traditionalist I've always preferred a model rocket...
"That young man knew his claim to fame, "I'm the first!"My grandfather used these... without, of course, the high tech plastic covered handles. I seem to remember them being rusty too. -=Doug"
Mar 26
R. D. Starwalt replied to Monroe Lee King Jr.'s discussion APM Repair Service
"Monroe is still around and has many projects he is involved with -- this repair service is not one of them that I know of. The posts I see here are common and have been repeated numerous times over the years I have been with this group. Now with the…"
Mar 23
R. D. Starwalt replied to Nolan Crook's discussion Generic Magnetometer on APM 2.6??
"It does sound like you need to reach out to 3DR. With a miswired cable, that could have been the root cause of all your issues. BTW you don't need to solder those little JST connectors. You can unlock the pins from the housing and move them as…"
Mar 22
R. D. Starwalt replied to Nolan Crook's discussion APM 2.6 FRIED from broken Power Module - Salvage??
"Sounds like you have covered more than 90% of my ideas. The zener, D4 can only do so much before it either blows or shorts out. D1 is for reverse supply connection protection but as you were using a PM, that should not have failed. D1would fail with…"
Mar 22
R. D. Starwalt replied to Monroe Lee King Jr.'s discussion APM Repair Service
"Um folks, look at the date of this post... I don't think Monroe quit his day job. Jason has a good question that is probably more a growth market -- turn key setup/repair. -=Doug"
Mar 22

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 - 35 years experience.
Please tell us a bit about your UAV interest
I am interested in amateur science applications of micro-aviation and the educational inspiration that interactive technology can provide to school kids.
Anderson, SC

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R. D. Starwalt's Blog

Eweek 2013 Triple Tree Aerodrome -- What a great place almost in my backyard!

Posted on September 28, 2013 at 7:47pm 1 Comment

Why did I wait so long to go to Triple Tree Aerodrome? The facility is fantastic and literally a gem less than a hour from my house.

I brought my two Arducopter quads and spent a huge amount of time letting folk hold them, and pour over…


The Instructables WBQ (Wide Body Quadrotor) has maiden flight!

Posted on August 26, 2013 at 7:44pm 5 Comments

Yes! Another APM 2.5 powered quadrotor took to the air in South Carolina. All that energy, time, effort and planning paid off this evening with the maiden flight of my entry into the DIY Drones sponsored Instructables Drone…


Winners of the 2013 Instructables Drone Contest (sponsored by 3D Robotics and DIY Drones)

Posted on August 5, 2013 at 7:43am 2 Comments

It is old news to some folk but the 2013 Instructables Drone contest ended on July 15 and the winners were:

(Note: Author names are Instructable member names. Several are…


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…


Comment Wall (13 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


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!


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!


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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