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John Hestness's Groups

John Hestness's Discussions

Practical Experience with PID tuning

Started Jun 26, 2011 0 Replies

I am in the process of tuning an APM equipped Parkzone T-28.  I have tried the "Easystar default parameters" and found it just lackidaisically wandering around off course, and uncaring about its…Continue

Advice on using APM for ground vehicle?

Started this discussion. Last reply by Darren Mar 6, 2011. 10 Replies


DIYdrones search not working

Started this discussion. Last reply by Ken Jan 3, 2011. 2 Replies

It seems that the search function for the website is not working.Continue

Parkzone T-28 Trojan autopilot platform

Started this discussion. Last reply by Henk Jul 12, 2013. 7 Replies

I decided to use the Parkzone T-28 as the initial plane for my APM.  I picked it beacause it is a straight forward 4 channel foam plane that fits in my trunk assembled and it has a huge removable…Continue

Tags: Trojan, platform, Parkzone, T-28


John Hestness's Page

Latest Activity

John Hestness commented on Phillip Jones's blog post Finally got to fly in restricted airspace!
"Congratulations!  Nice flight, fun and exciting video to watch, and good music. Can you say any more about the restricted airspace and what your program is and what the goals are?"
John Hestness commented on Brian Martin's blog post Thermal Imaging Camera Competition (FLIR ONE vs SEEK Thermal)
"I received a nicely worded delay letter from Seek this week: We are sorry we have not shipped your Seek Thermal order in the time we originally expected. First and foremost, we would like to sincerely apologize for the delays and for any…"
Oct 18
John Hestness commented on Brian Martin's blog post Thermal Imaging Camera Competition (FLIR ONE vs SEEK Thermal)
"I got an order confirmation email form Seek.  It says they have high volume and there will be a 5 to 7 day delay in shipping.  Fed Ex ground shipping in the U.S. appears to be included in the price."
Sep 28
John Hestness commented on Brian Martin's blog post Thermal Imaging Camera Competition (FLIR ONE vs SEEK Thermal)
"I just ordered a SEEK android.  Will report back whether it works as claimed."
Sep 26
John Hestness commented on ced siou's blog post My pneumatic launcher
"What is the piston size and stroke?  Weight?  Launches per tank?  Air pressure?  Very nice launcher.  I think I have seen a similar looking military model, did you base it on that?"
Sep 10
John Hestness commented on Greg Dronsky's blog post "Drone! Fly to the nearest Tree and come back to me"...
"On the internet, nobody knows you're a dog. "
Sep 8
John Hestness commented on Lester Haines's blog post APM:Plane advanced tree avoidance algorithm
"Using the RGB model, the opposite of green is magenta so either greenphobia or magentaphile.  Or maybe the pollen parameter. I like the other suggestions too! "
Sep 7
John Hestness commented on Hai Tran's blog post LiPO Fire onboard Fijian Airlines B737
"A friend and I have decommissioned a few lipo's using various methods (axes, hammers, guns) and charge states. This was not scientific or even documented, but there did seem to be a relationship between the amount of charge and the amount of…"
Sep 5
John Hestness commented on Chris Anderson's blog post New Dyson robot vacuum has 360-degree SLAM camera tech
"It looks like they kicked Roomba's butt.  The tracks look effective and the whole vacuuming system looks more serious. All this serious effectiveness must need a substantial battery, it will be interesting to find out what kind and size…"
Sep 5
John Hestness commented on Hugues's blog post How-to "catapult launch" and Arduplane (XUAV Talon)
"Good description, write up, and photos. I need to make something like this for an EDF plane that is slow to take off.  Thanks."
Sep 3
John Hestness commented on Aym Altorra's blog post NASA's electric plane achieves vertical takeoff
"They better OK this with Colson first.  Just Saying. "
Aug 21
John Hestness commented on Bob's blog post Man Creates Flying Hexacopter Drone With 3Doodler 3D Printing Pen
"I think part of the pen process is art.  Like comparing a computer or a formula to Picasso or Michelangelo.  I can see both sides of this being exactly right.  Sometimes you feel like precision, sometimes you don't."
Aug 20
John Hestness replied to Bill Babcock's discussion 3DR radio and Samsung Galaxy Tablet
"It might have to do with whether the tablet has USB OTG (on the go) and this determines if it can supply power.  If I remember correctly. "
Aug 16
John Hestness commented on Jonathan Hair's blog post My 2 cents to the FAA
"Love the title and the picture. Good write up. Agree totally."
Jul 9
John Hestness commented on Mustafa TULU's blog post USA Trip Canceled
"I'm going to keep watching, Trent.  I am looking forward to a trip summary and lessons learned kind of show.  I am sure we can all learn valuable tips from your recent  experience. And most important, keep thinking big!"
Jun 17
John Hestness commented on Roger Sollenberger's blog post Follow-Me Mode: Available Today, Free in DroidPlanner 2.0
"Awesome.  Is this compatible with all versions of APM hardware?"
Jun 15

Profile Information

About Me:
I started building robots and control panels in grade school. Now I upgrade and maintain industrial control systems. I started flying RC about a year ago and I mentor in the FIRST robotics program.
Please tell us a bit about your UAV interest
I just finished assembling an APM. I want to try it in an airplane, helicopter, quadcopter, and a snow sled that I made last winter. I would like to automate my yard work and house work. Some day I want a light speed star ship, with an autopilot of course.
Minneapolis MN

 kludge "to improvise with a kludge or kludges" and kludgemanship "skill in designing or applying kludges".

A crock that works. 

An ill-assorted collection of poorly matching parts, forming a distressing whole.

Something that works for the wrong reason.

A kludge is often used to fix an unanticipated problem in an earlier kludge; this is essentially a kind of cruft.


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John Hestness's Blog

Airventure 2013

Posted on August 1, 2013 at 12:30pm 2 Comments

Interesting things I saw at the EAA Airventure event in Wisconsin this week.

Here is former GMA host David Hartman interviewing astronauts Chris Hadfield, Chris Ferguson, Charles Precourt, and Charles Duke.

Hadfield talked about space walking and his youtube video.  …


Lifehacker interview of Chris Anderson

Posted on November 28, 2012 at 9:23pm 20 Comments

Happen to run across this today.  Great interview and a look at the workshop!

Quick and Easy Rover

Posted on April 4, 2012 at 8:21pm 40 Comments

In between aircraft I built this rover.  It is a Traxxas Slash frame with a piece of 1/8" aircraft plywood on top for an electronics platform.  The plywood measures 16.5" x 6.5".  It was super easy to build.  In the next few days I will finish configuring the electronics, update and confirgure the software and test it out. …


Free AI class possibly has Drone applications

Posted on December 16, 2011 at 5:00pm 1 Comment

I am just finishing the Intro to Artificial Intelligence free on-line class from Stanford.  There are probably many helpful things in this wonderful class taught by Peter Norvig and Sebastian Thrun.  But I have to mention the Particle filter algorithm that can locate a vehicle in a previously mapped environment quickly and with minimal computation. …


Comment Wall (2 comments)

At 12:31pm on July 22, 2011, George Tarrant said…


Sorry if this is a stupid question but have you decided the missions you want your planes to perform? Its the missions that will dictate the PID loops you need.

If your question relates more to PID gain values, I'll need a dimensioned 3-view sketch of the plane to begin with.

At 4:37pm on July 22, 2011, John Hestness said…
George, I am using Ardupilot Mega. The mission is just to fly the plane to the waypoints, assuming wind of 0-12 MPH (0-19 KPH). My question is about the gains, and I have linked to a 3 view below. The wingspan is 44 inches (112 cm) AUW is 39 ounces (1.1 kg) Thank you, John

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