R. D. Starwalt
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  • Anderson, SC
  • United States
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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 Rob Dunbar's blog post 1st Drone in Nevada Test Program Crashes in Demo
"Yes, the drones are to be feared...if you are in the launch path! I think almost every other news story showed show a crash/failure. At some point the general public will get over the media based hysteria that has been induced for the last three…"
R. D. Starwalt commented on Chris Anderson's blog post Good-looking VTOL project on Kickstarter
"This finally triggered me to sign up to Kickstarter... haven't back it, yet. Thanks for the post Chris! With all the recent discussion about VTOL and the challenges of the phase transition, it would be nice to have a bit more technical…"
R. D. Starwalt commented on Eric Compas's blog post APM response to catastrophic air frame/wing failure?
"OK. Let us think about how we could detect a lost servo...without adding a wire or two to the current servos on the market having power, return(ground), and signal(position) wires. As Jake alluded, there is no direct feedback from the servo to the…"
Dec 11
R. D. Starwalt commented on Eric Compas's blog post APM response to catastrophic air frame/wing failure?
"Eric, That's a super sounding program. I am a 1994 graduate of the Space Life Science Training Program (SLSTP) at KSC. This technology would have been super back then for several of the projects I worked with. GIS was a sub discipline at…"
Dec 10
R. D. Starwalt replied to Edgar Scott's discussion Should we put an end to requiring a traditional Tx for Multicopters? in the group ArduCopter User Group
"To slip a bit more into the side issue of feedback from the system we are controlling...there are several feedbacks in the conventional RC system. Feedback was a major concern when the 'fly-by-wire' (or previously hydraulics) systems were…"
Dec 10
R. D. Starwalt replied to Edgar Scott's discussion Should we put an end to requiring a traditional Tx for Multicopters? in the group ArduCopter User Group
"Glad you liked it Sam! Yes, a twist grip on single stick systems back then, had one large knob on top of the stick that was turned, like a volume knob, for rudder control. L/R was aileron like today, F/B was elevator like today. Twist was rudder and…"
Dec 9
R. D. Starwalt replied to Edgar Scott's discussion Should we put an end to requiring a traditional Tx for Multicopters? in the group ArduCopter User Group
"Tech change today is nothing new. In my research on Jack Headley (as Northrop Performance Engineer and well published aircraft modeler - see my blogs about him HERE) I came across an interesting 'disruptive idea' regarding the old…"
Dec 8
R. D. Starwalt commented on Eric Compas's blog post APM response to catastrophic air frame/wing failure?
"Andrew, we are talking about a $3 airframe here... To have APM 'know' the mechanical limits of all possible airframes (fixed wing only in this discussion) would require an agreed upon standard in destructive (or near destructive) testing…"
Dec 7
R. D. Starwalt commented on Eric Compas's blog post APM response to catastrophic air frame/wing failure?
"The APM would have to have an airframe supervisory sub-system to alert it to this kind of failure. Maybe in ArduPlane 37.6 ? ;) Seriously, even CF can break if the loads aren't designed correctly. I hate to hear of your flight failure. Crashing…"
Dec 6
R. D. Starwalt commented on Team Tiltrotor's blog post Prototype Tiltrotor Development using APM 2.5
"Ah yes, thank you. I have seen the drawer slide/MDF/All Thread approach before. Simple, economical, and effective. Look like you have a lot of axis movement/range. Thank you!  What software are you using for the G-code interpreter? (or what…"
Dec 4
R. D. Starwalt commented on Team Tiltrotor's blog post Prototype Tiltrotor Development using APM 2.5
"From your paper... What did you base the hardware (nuts and bolts and mechanics) off? I have considered this as another project and would like to know more... unless you plan to offer a cutting service. -=Doug"
Dec 1
R. D. Starwalt commented on Team Tiltrotor's blog post Prototype Tiltrotor Development using APM 2.5
"Larry - It is interesting to note that the young fellow in the UK employed a 'clear wing tip' like Team Tiltrotor used initially. If you pay attention to what he has done with the KK2 settings and his TX settings, he has distributed the…"
Dec 1
R. D. Starwalt commented on Daniel Lukonis's blog post Butterfly Drone flown with no battery!
"Picare, rain gutter screen material is usually found at hardware stores in the US. Sometime these are referred to as 'DIY Stores'. -=Doug"
Dec 1
R. D. Starwalt commented on Team Tiltrotor's blog post Prototype Tiltrotor Development using APM 2.5
"Jake - yeah that might be an issue but, I think he is willing to let that part of it go. ;) On the other hand, how cool would a propane/LPG powered tilt rotor be? Best save that pondering for another thread. He is currently showing step-by-step…"
Nov 29
R. D. Starwalt commented on Team Tiltrotor's blog post Prototype Tiltrotor Development using APM 2.5
"Team Tiltrotor here's the link to Rick's build.  OSPREY That link is his member profile and blog listings. Slide down the page for more pics like below. He is more of a airframe type of guy and has been looking for…"
Nov 27
R. D. Starwalt commented on Jake Wells's blog post My Free Foam board 250 sized quadcopter plans.
"Great Job! Why not a DTF (Dollar Tree Foam-board) quad? It brings the price point down to the group project (schools) level and upgrades the prop safety. A+ Jake! -=Doug"
Nov 27

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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