Brad Hughey
  • Male
  • Belvidere, IL
  • United States
Share Twitter

Brad Hughey's Friends

  • Cap
  • Hrishi Dharam
  • Josef Mouris
  • Tom Altmann
  • Chris Fulmer
  • aditya k
  • John Githens
  • Mike Klinker
  • James Dinh
  • Dean Wynton
  • Mehran
  • Marcos Costa
  • R. D. Starwalt
  • Rod Cole
  • Michael Duffy

Brad Hughey's Groups

Brad Hughey's Discussions

The FAA, A Book Review, and Thoughts of Redundancy

Started Jul 18, 2012 0 Replies

I just finished an excellent read: Why Planes Crash, by David Soucie.Mr. Soucie is a former FAA accident investigator and otherwise has a very diverse background in aviation.  However, far from a…Continue

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 Mike Eubanks Jan 28. 86 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

Our Host's Alma Mater Calls Us Out

Started Mar 7, 2012 0 Replies

I don't know how many of you read The Economist, so I thought I'd share this link to an article that brags on our Fearless Leader and this very community.  In the global context of "perhaps things…Continue

 

Brad Hughey's Page

Latest Activity

Mike Eubanks replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Brad - Hi, and a huge thanks for all the great detail here!  Still planning to put your machine together this spring? Key question (if you care to disclose): what are you planning to use for rotors/props?  Have you had time to run any of…"
Jan 28

Wiki Ninja
Gary McCray left a comment for Brad Hughey
"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…"
Jan 25
Luc Maximilien replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Ducted fans are not efficient for multirotors, I do not see any differences if blades are exposed or not when something fall in to your head from above.As anyone ever thought to put any protection on blades of a small airplane ?The other stuff is…"
Jan 25
Geo Kohler replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Ducted fans are definitely a must on any personal vtol aircraft for sure. Imagine the F/DWI incidents if everyone was whizzing around with exposed rotating blades protruding from every possible point of impact! lol With the massive power to weight…"
Jan 24
thomas lewis left a comment for Brad Hughey
"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…"
Jan 14
Brad Hughey commented on Gary Mortimer's blog post Would you fly it?
"I'm late to this party, but I'm actually glad to see other, currently more well-funded inventors getting into the manned electric multicopter fray.  It's an excellent idea (if I do say so myself), although this one has the added…"
Jan 13
Quadzimodo commented on Brad Hughey's photo
Thumbnail

eCopter 07Jul11

"Progress update?"
Dec 7, 2013
Brad Hughey commented on Tommy Larsen's blog post Full size Y6 Air-Scooter
"@Gary McCray: Thank you for your kind words.  Poles and zeros, my friend.  It's all about transfer function and feedback.  Larger inertial moments might seem like stability when in fact they create issues for correction and…"
Nov 18, 2013
Brad Hughey replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"If you have the power, a larger pitch will mean a greater coefficient of lift.  Think of pitch like gearing; the higher the pitch, the taller the gear.  So yes, you'll produce more thrust if you have the available torque to twist the…"
Nov 18, 2013
Brad Hughey replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"I'm still around, despite going back to my IT industry "day job" for funding.  My full-scale multicopter exploits shall begin anew in the spring of 2014. Your question is simple, but the answer really isn't.  A basic…"
Nov 17, 2013
Brad Hughey replied to Eloy Ritter's discussion Quadcopter and density altitude
"Yes, you're correct, I forgot about the top of your altitude range.  That's going to make a noticeable difference.  Assuming the temperature is the same (it rarely is), then at 9000 ft. the ideal power is 86 watts X 60% X 50% =…"
Sep 19, 2013
Brad Hughey replied to Eloy Ritter's discussion Quadcopter and density altitude
"Yes, the specs are best at sea level.  Without getting too involved in the math, thrust is going to be roughly proportional to air density.  I found a neat little calculator here: http://www.denysschen.com/catalogue/density.aspx Plugging…"
Sep 18, 2013
Brad Hughey replied to Zach Davis's discussion Large quad design
"You're right about needing variable pitch control with only 4 thrust units.  The rotational inertia of blades big enough for anywhere near a practical disk loading will make variable speed control unworkable.  Otherwise, read THIS…"
Sep 3, 2013
Brad Hughey commented on Tommy Larsen's blog post Full size Y6 Air-Scooter
"@Gary McCray: I am honored by your words of support, but Dan Wilson is correct.  The overhead rotor has everything to do with "packaging" of the disk area, which needs to be large in order to have any hope of a reasonable flight…"
Sep 3, 2013
Brad Hughey replied to Rick's discussion Possibility of an alternate power system?
"Hybrid electric power sources have been discussed in some length before in this venue.  The bottom line is: not only are fossil fuel engines feasible for aviation on-board power generation (high energy vs. mass ratio), but they're IN USE…"
Jun 24, 2013
Brad Hughey replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Thanks, Joe.  I contribute sporadically when the spirit moves me.  You can find a treasure trove of airfoil data at this site: http://www.ae.illinois.edu/m-selig/ads/coord_database.html "
Mar 25, 2013

Profile Information

About Me:
I am a personal aviation entrepreneur dedicated to manned electric VTOL flight. An EE by education and early career, I was active in the data storage industry until recently, including authoring a couple articles for Storage magazine.
Please tell us a bit about your UAV interest
Eschew the "U". My interest is manufacturing electric VTOL personal aircraft for the mass (ATV) market. For a technical treatise, please see US Patent #7,699,260 - A Vertical Takeoff and Landing Aircraft Using a Redundant Array of Independent Rotors.
Hometown:
Chicago Suburbs

Brad Hughey's Photos

Loading…
  • Add Photos
  • View All

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,
Wiki Ninja
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

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

© 2014   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service