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Building Copters with Round Tubes - Stronger, Lighter, Easier to Mount Motors than Square Tubes

Started by Forrest Frantz. Last reply by Hugues 11 hours ago. 465 Replies

Round tubes offer the following pros:handle twist better than square tubes.  Thus for the strength, are far lighter.are more readily available (pipes, tubes, arrows, kite frames, golf clubs and…Continue

Iris to X8

Started by Bob Kirkpatrick. Last reply by Ivan Bejarano on Monday. 7 Replies

My Iris was accidentally run over and two arms were broken off and the motors and propellers on those arms were destroyed. Iris' shell and contents were not harmed. I was thinking that I would like…Continue

APM with Raspberry pi (connection) make as a WI-FI

Started by yuvraj. Last reply by yuvraj on Monday. 7 Replies

I have to integrate the apm with Raspberry pi and my plan is I don't wanna use the 2.4 ghz radio instead of using this I need to fly through laptop/desktop or mobile phone If any body done please…Continue

Tags: raspberrypi, apm, wirelesscommunication, wifi

Anybody heard of ESC losing calibration after ESC low voltage cutoff

Started by Sean Headrick Jan 23. 0 Replies

  In an attempt to understand the absolute full extent of the battery payload, a field operator had conducted a test allowing the copter to loiter until it "fell" from the sky. I know, I cringed…Continue

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Comment by Dennis Fuente on January 7, 2014 at 12:30pm

Hi Sean 

 Yes i see that this is a common problem after updating to 3.1 i would think that 3dr would take care of the issue guess not. 

Thanks for the information i am going to try and go back to previous 2.9

Dennis 

Comment by ShadowAir Ltd. on January 7, 2014 at 12:25pm

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Comment by Sean Headrick on January 7, 2014 at 12:21pm

I had the same problem, likely a blown regulator. seems a pretty common problem. In the "load Firmware" section of mission planner there is an  option at the lower right side that says "load previous firmware" or "load previous version" . You can find version 2.9 there.

Comment by Dennis Fuente on January 7, 2014 at 12:14pm

hey guys 

Is it possible to go backwards in version say from 3.1 back to 2.9 my apm worked in 2.9 but came up with a problem in 3.1.

Thanks

Dennis 

Comment by Essam on January 5, 2014 at 11:49pm

Thank you all; I have making some progress towards my project while reading your inputs

Comment by Drone-University.com on January 3, 2014 at 2:12pm

@essam

You may have a look at this French site : http://airinov.fr/concept#/concept/télédétection

They are using 4 different lenses of which 2 different IR, specifically to do exacftly what you are looking for.

You may use Google automatic translation if you cannot read French.

Cheers


Moderator
Comment by Michael Pursifull on January 3, 2014 at 11:47am

@Essam: ArduCopter has no trouble at all climbing to 2200 AGL; in fact, it can get there very quickly.... the limiting factors here is regulatory and one of resolution and of vibration. As you are in the US, you'll need to stay under 400ft AGL. Being closer helps in that each pixel of your camera will cover a smaller bit of your target, meaning that it is generally more useful. It also means that whatever blur effect you have from high frequency vibration is a bit less destructive to the data, as long as it is within acceptable limits.

What is the reason you need to capture the entire area in a single shot (vs taking multiple shots in rapid succession using a patterned flight and stitching them together?) There are a growing number of software packages that stitch the photos together for you....

Comment by Sean Headrick on January 3, 2014 at 10:25am

@Essam As you are new to this technology, you may be overlooking the possibility of photo-stitching. In general terms this would allow you to take lower altitude, higher resolution images that could then be stitched together into a single flat image or into an actual 3D orthomosaic based on common points among the images or GPS tagging. It is still a pretty large area, but a fixed wing outfitted properly should be able to satisfy your requirements

  

Comment by Charles lakins on January 3, 2014 at 10:20am

I wouldn't say altitude is your problem until it comes to the camera resolution and filtering capabilities any craft given the amount of flight time required will perform the needed altitude and allow you the decent time to land too

 

to achieve the filtering required are there limits to distance to be effective ?

my concern is the farther away the less likely to get results usefull

Comment by Alan Jump on January 3, 2014 at 10:16am

@Essam Your operating altitude is going to depend on the field of view of your selected lens. If you need the camera to capture a single image to cover 120 acres, and your lens has a 38 degree viewing angle, my maths say you'll need to fly at around 2200 feet AGL. A wider-angle lens will reduce that altitude, but may distort the image.

 
 
 

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