Tom Mahood
  • Irvine, CA
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Need advice for imaging a steep ridgeline

Started this discussion. Last reply by Tom Mahood Aug 7. 9 Replies

I'm interested in imaging a possible archaeological site located along the spine of a fairly steep descending ridgeline and am looking for advice on how to approach the imaging. At the very least I'd…Continue

Any good GPS cameras lighter than a Canon SX230 HS?

Started this discussion. Last reply by Tom Mahood Apr 11. 4 Replies

I've been using a Canon SX230 HS on multicopters for mapping and vertical imaging. I think it does a great job and takes fantastic pictures....but it's heavy! At 220 grams it seriously shortens…Continue

Need help with difficult analysis of log for Loiter crash

Started this discussion. Last reply by Tom Mahood Feb 21. 1 Reply

I've spent the past 4 hours going through the logs of my tricopter crash with both MP and APM Planner trying to figure out why it went down and I'm stumped. I'm decent with log interpretation and try…Continue

Tags: crash, Loiter

Not getting correct kmz files created after update of MP and 3.1 rc-7

Started this discussion. Last reply by Tom Mahood Dec 12, 2013. 2 Replies

I updated both a quad and a tricopter to 3.1 rc-7 and it appears the kmz files for the logged flights are not being written correctly. Both craft had been running 3.0.1 and creating the kmz files…Continue

 

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Latest Activity

Tom Mahood replied to Francesco Bertelli's discussion [Wishlist] Auto-soft-landing on accidental throttle down
"Pretty much. That variable has been around for quite a while. Of course Position Hold is new to 3.2, but the variable applies to any guided mode, such as AltHold and Loiter. It simply caps the maximum descent rate. There are similar parameters for…"
8 hours ago
Tom Mahood replied to Francesco Bertelli's discussion [Wishlist] Auto-soft-landing on accidental throttle down
"That would be the "Speed Down" parameter in the WPNav section of the "Extended Tuning" tab. You can also change it in the "Full Parameter List"  where it's listed as the WPNAV_SPEED_DOWN parameter. Same…"
16 hours ago
Tom Mahood replied to Francesco Bertelli's discussion [Wishlist] Auto-soft-landing on accidental throttle down
"You already have at least two modes that do this, AltHold and PosHold, both excellent for aerial photography.  In either mode if you put the throttle to zero, accidental or otherwise, the craft will descend at its maximum allowable programmed…"
20 hours ago
Tom Mahood replied to Edgar Scott's discussion Is there a way to tell if Tx loss signal initiated my RTL in the group ArduCopter User Group
"Glad it worked out. I should have mentioned that one of the very first things I do when looking at any log is to filter for ERRs and see if there's anything going on. Sometimes I'm surprised to find things I had no idea were there."
Aug 15
Tom Mahood replied to Edgar Scott's discussion Is there a way to tell if Tx loss signal initiated my RTL in the group ArduCopter User Group
"The first clue is the big red error banners on the top of the graph saying "Failsafe Radio" for a start. Another thing you can do is right click on the bar just above row 1. You'll see a Filter dialog box appear. Filter on ERR and…"
Aug 14
Tom Mahood replied to Edgar Scott's discussion Is there a way to tell if Tx loss signal initiated my RTL in the group ArduCopter User Group
"Yep, that was it. Between 1.5 to 2 minutes you had a radio failsafe three times, the first when you were about 2,260' from launch. It stayed in RTL until about 3.5 minutes when you switched it to PosHold."
Aug 13
Tom Mahood commented on Timothy Clemans's blog post Drone seized by police at Los Angeles park
"Jonathan, I fully agree with all your points except the legality. It wasn't an airspace issue and it wasn't that there were people around using their cameras, why couldn't he (his just happened to have a flying tripod)? He violated a…"
Aug 8
Tom Mahood commented on Timothy Clemans's blog post Drone seized by police at Los Angeles park
"Correct, my mistake. Actually the Port Police is the appropriate entity to deal with this. It looks like he was flying from the parking lot of the USS Iowa Museum, which is ultimately controlled by the LA Port Authority. It's not clear from the…"
Aug 7
Tom Mahood commented on Timothy Clemans's blog post Drone seized by police at Los Angeles park
"Gary, the park regulations are part of the Los Angeles City ordinances which the Los Angeles PD is authorized to enforce. Don't know about the property confiscation rights though."
Aug 7
Tom Mahood replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"Thanks, Steve. I guess I'll plan on an attempt with a longer duration multicopter rather than fixed wing. It's a small enough footprint that it would be hard to match the elevation change with a fixed wing. A copter would give me much…"
Aug 7
Tom Mahood replied to NIKOLI YAP's discussion I could use some help with my skywalker, using pixhawk.
"Did you do a radio calibration? In Manual mode the RC controls are just passed straight through, and in Stabilize it only does self-leveling. The FBW modes take your stick inputs and react to them. If it isn't seeing correct stick inputs, then…"
Aug 5
Tom Mahood replied to William Cox's discussion Heavy Lift Quadcopter Pixhawk/U8 Tiger Motor Problems
"Good to hear it worked out OK. For me, that's a rarity....."
Aug 4
Steve Zeets replied to Tom Mahood's discussion Need advice for imaging a steep ridgeline
"Tom, I did this once, however there wasn't as much vertical difference.  But, it was in a small footprint area.  I mapped a sledding hill that was long and narrow with a lot of vertical relief.  Like iskess said, you just have…"
Aug 4
Tom Mahood replied to William Cox's discussion Heavy Lift Quadcopter Pixhawk/U8 Tiger Motor Problems
"Yeah, there is a distinct advantage to using the Multirotor setting on the Castles, but as I mentioned, also some quirks. The biggest deal would be the ability to do a 490 Hz motor update rate. That's the case in the Multirotor setting, but…"
Aug 2
Tom Mahood replied to William Cox's discussion Heavy Lift Quadcopter Pixhawk/U8 Tiger Motor Problems
"Bernie, if you are using the 35 Amp Multirotor ESCs they have fixed endpoints. The normal all at once calibration will not work with these. To arm them, but not have the motors spin they need to see a PWM signal of less than 1.11 milliseconds (1110…"
Aug 2
Tom Mahood replied to William Cox's discussion Heavy Lift Quadcopter Pixhawk/U8 Tiger Motor Problems
"A couple of things....First, are you sure you are in Stabilize mode when arming? The way you describe the motors coming up only after the throttle is raised past half sounds like it's in AltHold or Loiter modes. Second, Castle ESCs can be a…"
Aug 1

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Tom Mahood's Blog

Personal Drones May Present Public Safety Concerns

Posted on August 29, 2013 at 10:30pm 9 Comments

...Or so says the Joint Regional Intelligence Center. JRIC is yet another anti-terrorist agency most people have never heard of and is comprised of the Feds and law enforcement agencies in the counties of Southern California. The following single page…

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A composite folding H-quad

Posted on August 21, 2013 at 12:40pm 18 Comments

I've just wrapped up a new design based upon a lot of ideas I stole found on this site.…

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Comment Wall (1 comment)

At 7:14pm on December 12, 2013, Dennis Okeefe said…

this is cool.  i was looking for how to import .kmz files into mission planner and saw your post about exporting them.  i immediately realized who you were since i am a big fan of yours - black world stuff you have posted.  are you new to this "hobby"?   it would be a useful tool for "research".  anyway, do you know if you can import data directly from google earth into mission planner?  

timmy

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