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Be sure to count your waypoints...

Started this discussion. Last reply by Gary Mortimer Dec 24, 2013. 1 Reply

During a mission yesterday, my copter hit the first four waypoints, and then kept moving in the same direction, instead of turning towards the next waypoint. I watched it for a while and then brought…Continue

30 minute multicopter flight times, with a camera, in practice ?

Started this discussion. Last reply by Euan Ramsay Dec 18, 2013. 9 Replies

I am wondering if anyone is flying a platform that achieves 30 minutes flight time in practice, while carrying a small camera.The Phantom 2 Vision is close, at 20 to 25 minutes from a 5200mAh…Continue

Could use log analysis help.

Started this discussion. Last reply by Knut Graf Oct 21, 2012. 12 Replies

I did two flights today. One manual flight in stabilize mode, going into a loiter, back to stabilize, to RTL,and then landing in stabilize. Everything behaving as expected.Then a second flight, with…Continue

Side effect when using Ch6 Tuning

Started this discussion. Last reply by Knut Graf Aug 26, 2012. 4 Replies

While doing channel-6 tuning for 2.7.1 with Mission Planner 1.2.8 and 1.2.9, I found the following behavior:In the Arducopter Config screen, when clicking "Write Params", the parameter that is…Continue

 

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Latest Activity

Knut Graf posted photos
Apr 10
Knut Graf commented on Chris Anderson's blog post PocketDrone -- new APM-based Kickstarter project
"This looks like a smart design. But does "heavy lift" go together with "Capable of carrying up to 1/2 pound payload" ? The term "heavy lift" is often used for rigs capable of carrying DSLRs and professional movie…"
Jan 8
Knut Graf replied to Kevin W's discussion 3DR Iris vs Phantom 2 Vision
"Maybe one of the resellers in Europe or in the US might ship to Indonesia ? You might try onedrone.com (Europe) or UAVDirect (disclosure: I have friends there) or another one. Btw, you also brought up customer support. I've seen people have…"
Jan 7
Knut Graf replied to Ahmad Affiq Bin Sukari's discussion APM + OpenCV
"I have been looking at a similar use case, where a copter could LAND on a visual target, based on control inputs generated from computer vision on an onboard camera. That would be an amazing transitional-technlology capability, useful for…"
Jan 7
Knut Graf replied to Kevin W's discussion 3DR Iris vs Phantom 2 Vision
"The Phantom Vision 2 flight time is real, and it's hard to beat. The system is light, and the components are well-matched. There is a good amount of Phantom community support (on other sites), but the Diydrones community is exceptional. The…"
Jan 7

Moderator
Gary Mortimer replied to Knut Graf's discussion Be sure to count your waypoints...
"Make it part of your pre flight Knut, before you send it off review the mission. I have lost count of the number of times I have not put in an RTL or left an altitude at 0 and watched something I did'nt expect start happening. That review time…"
Dec 24, 2013
Knut Graf posted a discussion

Odd flight: following some waypoints, then not.

During a mission yesterday, my copter hit the first four waypoints, and then kept moving in the same direction, instead of turning towards the next waypoint. I watched it for a while and then brought it back with RTL, which worked fine.Reviewing the data this morning, I found that my mission did not have a waypoint 5. Instead, it connected wp4 to wp6, but the copter apparently did not know to skip the missing wp, and kept heading in it's previous direction.It's entirely possible that I…See More
Dec 24, 2013
Euan Ramsay replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"Agreed - something in the 16/17 prop range with an AUW of <3.5kg including 8A or more of capacity should get around 30 minutes. This will be tricky, as 8A is around a kilo, and the high pole count, 6S motors needed to crank 15/17 props…"
Dec 18, 2013
Knut Graf replied to Marek's discussion 2-axis gimbal for ortophoto
"Do you have an update on this gimbal ? I'd buy one if you sold it ! Thank you Knut"
Dec 17, 2013
Euan Ramsay replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"Slight modifier on my spec - I replaced the Ar8000 with an Orangerx with 2 sats on 30cm cables."
Dec 17, 2013
Euan Ramsay replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"I have room, but going to something like a 12,000 only gives me 1 more minute flight time! I'm pretty much at the optimum right now. However I can gain more by putting it on a diet - throwing the al RCtimer gimbal and getting a CF one at half…"
Dec 17, 2013
Knut Graf replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"You are right, OG. I'd expect a 30 min copter to have something in the 16 / 17 inch range prop size, although that is pure speculation. Some configurations do have considerable headroom in terms of payload capacity though, so that doubling…"
Dec 17, 2013
OG replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"no another battery will not work you need larger props as well . increasing battery density only give you so much and increases the overall waight. larger props probroply outside your motors sweet spot so the craft will be less efficient. formual is…"
Dec 17, 2013
Knut Graf replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"Thank you for the reply. This is in the performance range of the Phantom 2 Vision, but using a large battery. Do you think you have payload headroom for another battery ?"
Dec 17, 2013
Knut Graf replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"Thank you for the reply. So that's 15-20 minutes on the OFM Reptile 650. Have you achieved 30 with larger batteries ?"
Dec 17, 2013
Euan Ramsay replied to Knut Graf's discussion 30 minute multicopter flight times, with a camera, in practice ?
"Not quite 30 mins, but I can get 24 minutes at "smooth video" sticks at 900m ASL, at 20'c ambient. Landing at 3.5v.   - Quadframe "heavy", with 155mm legs (CF bottoms though), 4 pontoons and DJI plate - Tmotor…"
Dec 17, 2013

Profile Information

About Me:
I design software, and I fly RC.
Please tell us a bit about your UAV interest
Looking to do some scripting, and looking to win insight into the industry.
Hometown:
Austin

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Building a 3DR-B... found a frame orientation issue

Posted on May 12, 2012 at 7:51pm 4 Comments

After putting the copter together over a few exciting evenings, initial test flights showed some very strange control responses with pitch and roll being swapped. I could "correct" this by swapping my Aileron and Elevator receiver channels, but that made the autopilot's stabilization input completely unpredictable. I checked my wiring and documentation, and found the following:

The PDB that comes with the 3DR-B is oriented to use rotor 2 and 3 as the quad's front in x-mode.…

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Comment Wall (1 comment)

At 2:10pm on April 29, 2012, HangerRat said…

Knut,

Still available, the APM is yours if you want it. Paypal is just fine, my paypal email is: mikefapex@gmail.com .  Send me your mailing address and I'll get it in the mail to you ASAP.

Thanks,

Mike

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