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. 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 chrisa's blog post Heavy lifting VTOL technology, frames.
"You might have seen my Instructable... HERE is the DIYD blog link about some of it (last year). -=Doug"
Oct 10
R. D. Starwalt commented on chrisa's blog post Heavy lifting VTOL technology, frames.
"Good to see MHefny still around! He did *much* work with software and his controller. I enjoyed his discussions and explanations. Any project, unless for fun, should have specifications. You will never be able to determine if you project meets goals…"
Oct 10
R. D. Starwalt commented on chrisa's blog post Heavy lifting VTOL technology, frames.
"This looks budget-driven and not good-engineering-practice-driven. Better to say 'I used angle aluminum because it is cheap (or all I had)' rather than to try to rationalize add-ons and make pseudo-engineering arguments. CF has a place…"
Oct 9
R. D. Starwalt commented on Chris Anderson's blog post Google Science Fair winner models drone obstacle evasion on fruit flies
"He is trying to swat that quad with my favorite prototyping material..bless his heart. Anyone else notice the latency before movement? He actually stopped the plywood sheet and could have busted that quad if desired. Better to have written a learned…"
Oct 5
R. D. Starwalt replied to Pete Anderson's discussion APM 2.6 for sale
"That's a fire sale price... somebody jump on this before I do.. -=Doug"
Oct 5
R. D. Starwalt replied to Andrew Gaiennie's discussion I'm cursed
"If totally new to RC, one word - SIM. For all the money you have spent on hardware and trying to learn new skills, you could have purchased a computer sim several times over. They come with an infinite crash budget. They also come with more model…"
Oct 5
R. D. Starwalt commented on Greg Dronsky's blog post Carbon Nanotube Yarns Could Replace Copper Windings in Electric Motors
"Electric machines still depend on the iron laminate plates for field shaping in the induction motor world. To be sure, the replacement of copper wire with another material will reduce the device weight.It looks like the lead photo is a three pole…"
Oct 5
Jason McPhee replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"There's one big thing I think we're all missing here.  Imagine I"m using one battery to power the plane, and a BEC on the output rail.  Even if I have JP1 open, the servo return current, can still go back to the battery via…"
Sep 28
R. D. Starwalt commented on John Githens's blog post Google Glass, civilian drones, and space for reflection
"A very interesting read John, thank you for referring it. The populace doth complain too much, me thinks. ;) I think Glass is not much more than a repackaged cell phone with internet. Even more so I think the public - I choose that word specifically…"
Sep 19
R. D. Starwalt commented on CliffN's blog post PX34-A refit (update 2)
"Weight is the enemy of things that need to move. I am not a fan of 'quick build' wings if higher performance is important. Jaron's Intermezzo wing is a very stiff, KF5 type, and his central structure could be modified for a…"
Sep 16
R. D. Starwalt commented on Chris Anderson's blog post 3DR announces partnership with Intel on Edison for Linux-based companion for Pixhawk
"Jack, I get the joke. It came at a great moment. -=Doug"
Sep 11
R. D. Starwalt commented on Chris Anderson's blog post Gas-powered quadcopter second Pixhawk-based finalist for The Hackaday Prize
"Rob, I totally agree and often seeing attempts like this remind me that inspiration needs to be tempered with research. Helicopters have never been mechanically simpler with DFC/Flybarless setups. The electronics can work well with good mechanicals…"
Sep 6
Rosario W Trusso replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Hello I'm still studying and setting up my APM 2.6 ,but after reading the last few lines of your problem it seems to me that's exactly what has happened you supplied to much voltage to the board -if you had the jumper installed and…"
Sep 4
R. D. Starwalt commented on Chris Anderson's blog post Gas-powered quadcopter second Pixhawk-based finalist for The Hackaday Prize
"Yeah...wow. Reminds me of previous attempts like the SkyCar... sorta. Moller So...if I were going to go with an ICE power source that size, the Youngblood approach works. Just scale it up and perhaps go with shaft drives. Wow. -=Doug"
Sep 4
R. D. Starwalt commented on Tim V's blog post BE Tech Club Kickstarter Failed, Moving to IndeGoGo
"You might consider links to the school or more information up front to clearly identify your location. I figured it out after going to your profile. You are welcome to come to my garage and haul off half the stuff I have for your program. I keep…"
Aug 23
Marc MERLIN replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Aaah, the power module isn't protected from powering the servo rail with the diode when JP1 is installed? Ok, not sure why it would be designed that way, but now that makes sense, why you'd have to remove JP1 if you use the power…"
Aug 19

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.
Hometown:
Anderson, SC

R. D. Starwalt's Photos

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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…

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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…

Continue

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…

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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…

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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

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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