Brad Hughey
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  • Conroe, TX
  • United States
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Brad Hughey's Groups

Brad Hughey's Discussions

North Central Illinois (Rockford) Area Test Field Wanted

Started this discussion. Last reply by Gary McCray Jan 12, 2013. 19 Replies

My electric multicopter is 25 feet wide from propeller tip to tip.  Testing it in my driveway is no longer a viable option.  Mechanical and electrical failures have been eliminated, and now it's time…Continue

The Case for Large-Scale Electric Multicopters

Started this discussion. Last reply by James Thesken Apr 30. 140 Replies

This discussion thread is a follow-on to several conversations I've had with people in the forums who are particularly interested in the aerodynamics of vertical take off and landing (VTOL)…Continue

Tags: cyclic, control, quadcopter, quadrotor, multicopter

The Most VTOL Fun You Can Have for 20 Bucks - Syma 107

Started this discussion. Last reply by Brad Hughey Nov 10, 2011. 3 Replies

I bought my son one of these electric model R/C copters for his 9th birthday, and I'm embarrassed to say I've played with it more than he has.  It is an indoor flyer, remarkably stable, and while the…Continue

Tags: Syma, S107, Amazon, Helicopter, R/C

Soft Start Throttle

Started this discussion. Last reply by Brad Hughey Aug 10, 2011. 2 Replies

For me it seems APM system leaves about 20% of the first throttle travel as dead slack, then suddenly springs forth with about 20% duty cycle in the PWM signal.  This probably isn't an issue for most…Continue

Tags: start, soft, response, Throttle

 

Brad Hughey's Page

Latest Activity

Brad Hughey replied to Kate's discussion Flight time vs. battery life
"And the somewhat counter-intuitive part is that your ship will be less stable. Raising the CG closer to the lifting plane or even higher will help, but only so much."
May 3
James Thesken replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
" As something related to T-Motor, I bought six of their 80A ESC's for $70 each. They left the factory receipt in the box with each ESC costing $6 each to manufacture. Funny how amazingly cheap these electronics are to make. "
Apr 30
Gary McCray replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Interesting points Lu and Stmp, I have used quite a few KDE motors on 400 sized quadcopters with up to props but have not had occasion or need to operate them near maximum. I have found them to be excellently reliable and they have good design with…"
Apr 30
Luc Maximilien replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"About T-Motors and other hardware companies I would like to underline that they  often lie about the performances of their products , I had  a long discussion with T-Motor because of 20% less performance than their data sheets even with…"
Apr 30
Gary McCray replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Hi Rob, Sorry if I've given the wrong impression, I totally agree, that the Phantom and Mavic (and Solo) class quad copters and the newer smaller Spark and even smaller ones have a fantastic future and because of their simplicity, reasonable…"
Apr 30
Gary McCray replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Hi Rob, Just to respond to parts cost differential: I think the market for 30" T-motor propellers is vanishingly small, they are virtually a custom item, same thing for their largest $600.00 motors. It is a market they are trying to create, not…"
Apr 30
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Gary, I actually think that for basic hovering operations, or flight at low speeds, or in light wind conditions, multirotors actually make more sense.  You basic consumer aerial video, or even professional stationary aerial video, a multirotor…"
Apr 30
Gary McCray replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Hi Peter, In the UAV area where we normally are there really isn't any difference in control of a heli or multi, they both use the same fly by wire control. Comparing ease of controllability of a manual manned helicopter to a fly by wire manned…"
Apr 30
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Yes.  Again, my intent here is not to say that electric multirotors have no place, or that helicopters are just better. It's just to have an honest discussion about the issues. We can't advance the technology if we don't tackle…"
Apr 30
Brad Hughey replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"@Peter Dobber - You've made an excellent point . The bottom line: how to achieve lifting platform reliability? Conventional single-rotor helicopters are reliable because they set a goal of attaining and maintaining mechanical perfection. Think…"
Apr 30
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Peter, This idea that "helicopters are hard to fly" is just completely untrue.  It's a very common misconception that permeates the drone industry.  But commonality doesn't make it true. Helicopters are not hard to…"
Apr 30
Peter Dobber replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Rob and Gary, It's a nice little chopper and an impressive video. Issue with all conventional helicopters is that they are difficult to pilot and very expensive to maintain. Flying choppers like this will be a manual task for the foreseeable…"
Apr 30
George Kelly replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
Apr 29
Gary McCray replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Hi Rob, That is one really cool little copter alright, and $50,000.00 is actually an amazing deal with that lovely little turbine. Frankly I seriously doubt the Kitty Hawk can manage 5 minutes, really quickly hit the weight design limits of that…"
Apr 29
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Gary, Thing is, I don't really considering anything shown in that video to be dynamic flight.  It's just really easy hover manoevering.  Compare that the performance shown here, skip ahead to 1:50 and hang on to your…"
Apr 29
Gary McCray replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"It is interesting to me that the Kitty Hawk works as well as the video seems to indicate it does. The relatively few large fixed props would seem to indicate that control should be marginal at best. I imagine the video was achieved over several…"
Apr 29

Profile Information

About Me:
I am a personal aviation entrepreneur dedicated to the proposition that flying is the ultimate expression of freedom. An electronics engineer by education and early career, I was active in the data storage industry for a long time. But my first love has always been aviation, having passed my private pilot check ride 4 days after my 17th birthday.
Please tell us a bit about your UAV interest
It's ironic that coming from the data storage industry, my job was to preach the benefits of having redundancy and fault-tolerance. "If it moves, it fails."

Regular helicopters rely on achieving and maintaining mechanical perfection for reliability. What if they were designed more like enterprise storage systems?

THEY CAN BE.
Hometown:
Chicago Suburbs

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Comment Wall (6 comments)

At 5:38pm on July 29, 2011, Julie Macfarlane said…

I have about 30 years experience as an EE and have all the neat tools  :)

Either thats a very small driveway or you are out of control  :)

Must be a blast to fly!

At 5:52pm on July 29, 2011, Brad Hughey said…

It's a full-sized (3-car garage) driveway and the eCopter has a 30 foot rotor array span.  I guess it might look like a model, but it's a single-passenger FAA Part 103-compliant (ultralight) human-carrying multi-rotor electric VTOL aircraft.  It will be a blast to fly, but there are some unique tribulations with ground-effect aerodynamics that I am very close to solving with the help of a little automation.  :-)

At 3:59pm on March 5, 2012,
T3
William Premerlani
said…

Hi Brad,

I am not sure what you mean by your question, "how fast is fast enough". Could you elaborate? If you are talking about sampling rate, tests that I have done show that 8000 samples/second is about right.

Bill

At 5:58pm on October 2, 2012, R. D. Starwalt said…

Methinks the same. Friends we are now.

-=Doug

At 7:24am on January 14, 2014, thomas lewis said…

This is a excellent platform to develop for a affordable and safe flying machine.I'm guessing you could use some of the same software and hardware,that was developed for the hobby,commercial multicopter market with a little tweeking.The design affords itself to,being able to fly on fewer than all the motors and a ballistic chute,making it,really safe .A slow,low altitude,affordable VTOL aircraft,I love it,good luck,I have no doubt you will succeed.Hopefully we will see more and more software,hardware being developed.

At 12:10pm on January 24, 2014, Gary McCray said…

Hi Brad, I foolishly started a Blog about optimal Multicopter design and it has kind of gone ballistic.

I consider you one of my main mentors in this area with your very solid grounding of the real issues and aerodynamics to which they are subject.

I'd very much appreciate it if you might take a look at the blog and possibly insert some of your own perspective.

http://diydrones.com/profiles/blogs/some-multicopter-design-thoughts

It could use a serious grounding and benefit from your insight.

Best Regards,

Gary

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