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

Wanted: Dead/Busted GoPro - any model

Started this discussion. Last reply by R. D. Starwalt Feb 4, 2014. 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, 2014. 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 Chris Anderson's blog post Canada says if a drone has a "remote" it's not autonomous. What would Chappie think?
"Semantics and interpretations aside (definitions, though in print, do change in time) - the focus of the article I linked, by Bruce T. Clough, was not on what a thinking machine/robot/UAV is or is not but, on how do we measure…"
Mar 21
R. D. Starwalt commented on Chris Anderson's blog post Canada says if a drone has a "remote" it's not autonomous. What would Chappie think?
"Good distinction regarding AI but, would not some level of intelligence be required and isn't that the Skynet reference? THIS article discusses UAVs in particular (the link should pull down the pdf). A quote on Wiki from the…"
Mar 19
R. D. Starwalt commented on Chris Anderson's blog post Canada says if a drone has a "remote" it's not autonomous. What would Chappie think?
"As I have said for over 15 years...  IT ≠ IQ Our tech isn't even a smart as a cat - yet - and probably will not be for quite a while. A cat's ability to 'sense and avoid' is amazing and part of their basic…"
Mar 18
R. D. Starwalt commented on Chris Anderson's blog post 3DR Spektre and IRIS+ get FAA commercial use approval
"BNSF (Railroad owned by Warren Buffet), Build Imagery (Development Videographer). Two very different companies with one common need - views from a different perspective. It is nice to see technology adoption but, better to see validation…"
Mar 13
R. D. Starwalt replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"There is a subtle difference between '5V' and Vcc in APM2.6. 5V is defined as the connection at JP3 ---> JP1(closed)---D1---F2--- then it becomes Vcc afterward. The PM supplies JP_Vcc----JP1(open)---D1---F2--- same as above. If JP1 is…"
Mar 12
Ahmed Shareef replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Yeah that's right. After that I used a spare cable but didn't power up. I checked and pm gives out 5.4 v. Please note that I can power up apm using servo rail output."
Mar 8
R. D. Starwalt replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Which part burned? There have been reports of the small cable from the PM to the APM burning, usually the ground/earth wire. You should suspect F2 is open. Take care with the wiring to follow the recommendations in the documentation. -=Doug"
Mar 8
Ahmed Shareef replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"hi guys, I'm using apm 2.5, hk esc with sbec, apm power module. today while testing motor and servos, somehow the PM cable burnt to ashes. i suspect esc because motor was running at the time. PM was quite hot. Then i removed esc and use…"
Mar 7
R. D. Starwalt replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Did you sort out the issue with the bad APM? I just reread the above post and *10* amps is a lot of current with no motors turning! The APM should only draw milliamps when simply powered up. There are several components that, if failed, could make…"
Feb 25
R. D. Starwalt commented on Gary Mortimer's blog post The Mexican immigrant who set up a global drone firm
"Timing is critical in any trend and Jordi Munoz was at a right place at a right time with the right collection of silicon and code. Of course luck favors the prepared and he was prepared. The media loves a underdog-success story and tends to…"
Feb 24
David Jones replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Ok so I test with a new APM2.6 VCC now reads correct with all other setup the same as before. Must have been a fault on the board or chip? Also the fault I had with Lipo volt reading was caused when I tried to calibrate it selected…"
Feb 13
David Jones replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Now I have also the main battery voltage sensor and current meter not working, I have 3 Power Modules I tested with but all give same results so the problem must lie elsewhere. The Current reading is showing 10 amps even when nothing is happening, I…"
Feb 8
David Jones replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"thanks for reply but not sure we understand each other. My APM 2.6 is powered from the Power Module that supplies 5.3v, servo is powered separately from a 5v UBEC. Its the APM that is giving errors regarding low voltage, and the APM that I checked…"
Feb 6

Bill Bonney replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"It probably means your UBEC voltage is sagging under load from the servo. I'm assuming you are powering the servo with the same UBEC? The voltage sensor is actually built into the AVR chip, so its unlikely to be faulty without it not working at…"
Feb 5
David Jones replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Hi, could someone possibly help me with an error I'm getting or at least point me in the right direction as I'm kind of new here. I have APM 2.6, gps, x8r, tinsy, on a tricopter (servo powered from separate UBEC) Data logs report VCC…"
Feb 5
R. D. Starwalt commented on Rui Costa's blog post $15K AERIAL PHOTOGRAPHY DRONE HELICOPTER FLY AWAY CRASH / RESCUE in the AMAZON Rainforest!
"'Break' being a phrase everyone can understand. Those of us in the techno-nati understand that either the pot in the stick went south or the channel failed, got reassigned, or something along those lines. Betcha that one gets some…"
Jan 26

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 national support specialist for MRI systems - 36 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

Guess what was seen at the NMAM in Muncie, IN?

Posted on April 19, 2014 at 10:30am 7 Comments

This week I visited the National Model Aviation Museum in Muncie, Indiana. If you have never been, put it on your short list of 'to-do' items - seriously. Just inside the main front door, to the right is a double set of doors, with glass windows, that lead into the Claude…


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…


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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