John C Hansen
  • Saint Charles, IL
  • United States
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Tricopter vs Quadcopter vs Hexacopter

Started May 2 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 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

Connection a USB joystick to a Ground Station

Started Apr 29 0 Replies

Is there a (standard) way that joysticks can be used in place of the more common controls that are included with all radio controllers?Continue

Tags: Joysticks

Availability of Shrouded Propellers for hovering platforms

Started Apr 20 0 Replies

I have read a number of threads related to shrouded propellers. And, if the primary goal were to significantly improve the safety of a drone used for close inspection of buildings and roofs, then any…Continue

Tags: Propeller, Shrouded

 

John C Hansen's Page

Latest Activity

John C Hansen posted a discussion

Tricoptor vs Quadcoptor vs Hexacoptor

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 same lift, endurance, and speed.Now I feel I should ask if these three configurations actually could be made to lift the same for the same amount of time at the same speed.What makes any designer choose a tri, quad or hex? Does each design have distinct attributes that the others lack? Are they each…See More
May 2
John C Hansen replied to Chad Frazer's discussion The Perfect Camera System - Can anyone do this?
"@Chad Frazer - I also wanted to write this post myself, so I am glad you did write it. I may have written a few less things than you did and a few of my needs are actually simpler than yours. One big example of the difference between us is that I…"
Apr 29
John C Hansen posted discussions
Apr 29
John C Hansen replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"@ Rob Lefebvre - It is good to see an octocopter that has made the leap from paper to a real aircraft that flies. The performance stats for this octocopter that you have mentioned here bring me to ask: Why did you use motors that do not have higher…"
Apr 28
John C Hansen replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"@Brad Hughey, I enjoy your input on this subject. As I read your last comment in this thread: "...the angle of attack range can be very limited.  This means that there's a very narrow range of speeds (advance ratios) in which such…"
Apr 27
John C Hansen replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"@Luc Maximilien I see the note on page 13 that you refer to related to Open Source, and I believe it refers to the network that would integrate the different state-wide agencies in North Carolina. With various patents for the actual AVEA, I presume…"
Apr 27
John C Hansen replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"@Luc Maximilien From their website, The AEVA can carry 5 Kg./ 11 pound camera gimbal for ONE HOUR between quick recharges. While I cannot determine the Figure of Merit for this aircraft, these specs far surpass what is currently available in the…"
Apr 26
John C Hansen replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"@Brad Hughey Thank you for that link. I am happy to see the design of a hexacopter as shown in the photos. It is a design I believe in strongly, but I am puzzled by why more "hobbyists" are not pursuing it. Six ducted fans or shrouded…"
Apr 25
John C Hansen replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"I recognize that this is an old discussion, but I would like to interject my thoughts on this topic. The discussion title drew me in because of the term "large scale" added to the word multicopter. Then I see in the first paragraph the use…"
Apr 25
John C Hansen added a discussion to the group PIXHAWK
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Can the PIXHAWK be programmed to flip a Quad?

Can the PIXHAWK be programmed to do specific flight routines? I am curious about flipping a quad or hex and then flying inverted by simply issuing a single command. (I am just a curious guy.)See More
Apr 20
John C Hansen posted a discussion

Availability of Shrouded Propellers for hovering platforms

I have read a number of threads related to shrouded propellers. And, if the primary goal were to significantly improve the safety of a drone used for close inspection of buildings and roofs, then any net efficiency gain would simply be a bonus.  Based on what I read though, the net efficiency of producing static thrust may be as much 50% to 60% even after deducting for the additional weight of the shroud. This would allow for either of three different design changes. 1) a smaller overall size…See More
Apr 20
John C Hansen posted discussions
Apr 18

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.
Hometown:
Saint Charles, IL

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