John C Hansen
  • Saint Charles, IL
  • United States

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John C Hansen's Discussions

What Does Blade Flapping Mean?

Started Mar 9 0 Replies

After reading the following paper, I would appreciate some help understanding what "Blade Flapping" means.…Continue

Tags: Blade Flapping

How much More Thrust Is Produced By A Shrouded Propeller Compared To An Unshrouded Propeller When the Power Remains Constant?

Started Mar 9 0 Replies

There may have been more than one discussion of shrouded props, but after reading the threads and a great deal of the reference material on prop design, I am more interested in a variation on…Continue

Tags: Propeller, Shrouded

Tricopter vs Quadcopter vs Hexacopter

Started May 2, 2017 0 Replies

When thinking through the three different designs, I am pondering what would be the desirable traits of a Tri, Quad, or Hex, if the overall flight capability of each were the same in terms of the…Continue

Tags: Drone Design, Hexacopters, Tricopters, Quadcopters

Looking for a NORMAL Focal Length Lens

Started Apr 29, 2017 0 Replies

Where are the best resources for cameras with a FOV of around 40 degrees? This is equivalent to what we commonly call a "normal" focal length. And, once we find this lens, where would I find a 1"…Continue

Tags: Normal Focal Lenth


John C Hansen's Page

Latest Activity

John C Hansen replied to Johnny W. Brewer's discussion Question about dihedral.
"@Coastwise, No, nothing new. I wrote to the authors of the report I mentioned earlier. They had not evaluated the theoretical impact on the efficiency and flight time. I am preparing to do some of my own testing, but the design work is going slow…"
5 hours ago
John C Hansen replied to Karan Chawla's discussion Thrust Vector
"Gary McCray, I have searched the internet extensively on these two concepts of propeller dihedral and propeller twist, and I am unable to find any testing results or research that addresses the question of the impact on efficiency of either one. The…"
John C Hansen replied to Johnny W. Brewer's discussion Question about dihedral.
"I know this is an old discussion thread, but I have recently found a research report from 2017 on the math involved here: A Unified Approach to Configuration-based Dynamic Analysis of Quadcopters for Optimal Stability…"
John C Hansen posted discussions
Mar 9
John C Hansen replied to Beat Color's discussion Best Drones for Real Estate Photography
"Thanks for posting this. I am curious about the "smallest" autonomous flying course that can be flown. When a manufacturer says they can fly a course, they are often doing this for large tracts of land, or following a road, river, or power…"
Mar 7

Profile Information

About Me:
I am a licensed home Inspector in Illinois with experience as a private pilot. I also have a limited amount of experience building model RC planes and assembling electronics on PCBs.
Please tell us a bit about your UAV interest
I am looking to build a task-specific drone that is designed to do inspections of roofs without the need for ladders and actually walking the roof. I am looking for the optimum flight controls and camera sensor / lens that will make roof inspections safe and result in quality photographs that will be included in my inspection reports. Video capture is not a priority, and speed and distance traveled is also not part of my criteria.
Saint Charles, IL

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