Sean Skirvin
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  • Bowling Green, OH
  • United States
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Sean Skirvin's Discussions

Tandem Rotor-craft

Started this discussion. Last reply by Sean Skirvin Oct 7, 2011. 2 Replies

I am currently working on building a tandem rotor (chinook type) helicopter for use as a photography platform.  Not too far along yet, I have 2 x trex450 clones on the way from China at the moment.…Continue

Tags: trex, mixing, channel, helicopter, chinook

$100,000 Darpa UAV Contest

Started this discussion. Last reply by Stephen Wuest Nov 10, 2011. 8 Replies

Just wondering if anyone else here was entered in the Darpa UAV contest. I am currently working with a few guys on a entry. Basically they want a VTOL uav that can fly 2 miles NLOS(non line of sight)…Continue

 

Sean Skirvin's Page

Latest Activity

Sean Skirvin commented on Andreas's blog post RCTimer Brushless Gimbal and Controller
"it is a little off topic, but I liked watching the food disappear in the last vid"
May 9, 2013
Sean Skirvin commented on Christiaan van Vollenstee's blog post FPV X-4 Quad Frame
"While a agree with everyone about the aerodynamic losses, I think there are two other points to consider.  One is that shaping the arms this way could in theory make it less affected by wind. The second is glassing in a mold with the…"
Apr 26, 2013
Sean Skirvin replied to Gabe's discussion right and left rotation semi-symmetric rotor blades anywhere? in the group ArduCopter (traditional heli) user group
"Like the belt drive!  This is similar to the project I am working on at the moment(a tandem rotor using 335mm blades).  I was wondering if you have, or were planning on publishing any of the data you collected testing the rotor blades.…"
Feb 12, 2013
Sean Skirvin replied to Gabe's discussion right and left rotation semi-symmetric rotor blades anywhere? in the group ArduCopter (traditional heli) user group
"If you are interested in collaborating with someone on the production of those blades, I would be interested.  I have been seriously thinking about developing some CW and CCW asymmetrical rc heli blades for a project I have been working on…"
Feb 12, 2013
Sean Skirvin commented on Gisela & Joe Noci's blog post A large scale Variable Pitch Tilt Quadrotor implementation.
"Very nice!  Just one thought, if you fly it and realize that you have way too much yaw control with the current system, I think you should try just doing a DCP for the yaw, and using the tilt, at a much slower setting, for trimming the…"
Jan 5, 2012
Stephen Wuest replied to Sean Skirvin's discussion $100,000 Darpa UAV Contest
"I agree with the comment that this is not a military UAV site. I have reservations about the managerial efficiency of anything overseen by DARPA. I have serious doubts that Boeing or Lockheed or the big aero boys have practical experience building…"
Nov 10, 2011
Sean Skirvin commented on trappy's blog post TBS Video Update
"Excellent videos, good production value, and nice music too.   You do some insane maneuvers my friend, I was on the edge of my seat a few times!   I am also interested in what kind of video/Tx/Rx system you are using."
Oct 7, 2011
Sean Skirvin replied to Sean Skirvin's discussion Tandem Rotor-craft
"I was also thinking, instead of using collective differential for my pitch control, just using the elevators already on the SP and switching the orientation of the 450 bodies to facing each other, instead of facing away."
Oct 7, 2011
Alfred Riopel replied to Sean Skirvin's discussion Tandem Rotor-craft
"Looking forward to following your build. keep us posted."
Oct 7, 2011
Sean Skirvin left a comment for Alfred Riopel
"I started a individual thread for my questions about the tandem.  Thanks for all your help thus far.  I really like your coax too!   http://diydrones.com/forum/topics/tandem-rotor-craft"
Oct 7, 2011
Sean Skirvin posted a discussion

Tandem Rotor-craft

I am currently working on building a tandem rotor (chinook type) helicopter for use as a photography platform.  Not too far along yet, I have 2 x trex450 clones on the way from China at the moment.  I have some braided carbon tubes from Dragon Plate that I was going to use to connect the 450 bodies.  After some helpful words from Mr. Riopel, I have decided to use one motor mounted in the middle to power both rotors.    I'm not certain, but I'm considering using the tail belts from two…See More
Oct 7, 2011
Sean Skirvin replied to Alfred Riopel's discussion Feature request.: Coaxial Collective & differential collective yaw mixing in the group ArduCopter (traditional heli) user group
"Wow, thanks!  Quick question though, do you think it is required to mechanically connect the drive trains if I used a gyro and my rotors not overlapping?   As for needing help with the hierarchy, I'm not sure.  Here is what…"
Oct 5, 2011
Sean Skirvin replied to Alfred Riopel's discussion Feature request.: Coaxial Collective & differential collective yaw mixing in the group ArduCopter (traditional heli) user group
"I would also be very interested to see this as I am building a 450 tandem rotor.  I was planning on doing external mixing but would much rather it be done in the APM.  Also looking at getting the PhoneDrone board when it comes out and…"
Oct 4, 2011
Sean Skirvin commented on Jacob Eraklidis's blog post My UAVforge submission
"I wasn't trying to be overly negative, or say that it can't work.  I was just saying it is not the most inherently stable VTOL platform.  Also, if you can find someone that makes a VP EDF, I would be very interested to play with…"
Sep 24, 2011
Sean Skirvin commented on Jacob Eraklidis's blog post My UAVforge submission
"True, the Saturn V did that, like other rockets, but a 6 million pound rocket is going to be affected by the crosswind less (density/shape) and more slowly (inertia) than a 6 pound uas.  "
Sep 23, 2011
Sean Skirvin replied to Ihab Ali's discussion Flash Demo for new control rules
"Not me, I barley understood the old rules!"
Sep 23, 2011

Profile Information

About Me:
Background in wind turbine/composite development and manufacturing .
Please tell us a bit about your UAV interest
Always been interested in building things.
Hometown:
Bowling Green

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