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building your own APM hardware with arduino mega2560

Started by shanthosh ravikumar. Last reply by Joe Bredestege Mar 22. 6 Replies

i am trying to build the hardware itself .... as of now i have a i2c based mpu9150 only... i'm planning on buying the other sensors soon and maybe make a sensor sheild !! i have tried uploading the…Continue

Handling servos in ArduCopter.cpp

Started by Bernabe Puente Moure Mar 4. 0 Replies

Hello everyone.I am a developer with many years of experience but a complete newbie in Ardupilot.I'm trying to modify the ArduCopte.cpp controller to add the servo handling functionality just as…Continue

quadcopter model dynamique identification

Started by telli khaled. Last reply by telli khaled Mar 2. 3 Replies

hello everybody I confused about quad-copter model identification , since the quad is unstable in open loop ,then how can I identify it since is unstable ??? but if I add a controllers in loop of…Continue

MAVLink Tutorial for Absolute Dummies (Part –I)

Started by Shyam Balasubramanian. Last reply by Shyam Balasubramanian Feb 27. 105 Replies

Hi All,I was recently fiddling around the code for a while and decided to create a tutorial out of it so that others may find it useful. If I would have known this knowledge long back, I am sure I…Continue

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Comment by Chris Gough on February 24, 2012 at 4:45am

Pay attention, sometimes motors have in their specs the thrust, but it's not lifting thrust but horizontal thrust (for planes)

??? I thought thrust was thrust.

motocalc works well for me.

Comment by Rui Manuel Cravo Marques on February 24, 2012 at 4:38am

Gjango, I don't know if you're familiar with this site : http://www.ecalc.ch/ 

The thrust depends on several factors : motor power, motor kv, propeller used. A 100w motor with 800kv and a 13" propeller will give you less thrust than a 300w motor with 800kv and a 13" prop, since the last one will be able to maitain higher rpms with such a "eavy" prop, but the motor will also be heavier. Pay attention, sometimes motors have in their specs the thrust, but it's not lifting thrust but horizontal thrust (for planes)

Comment by Gjango on February 24, 2012 at 4:28am

hi to all

How can I calculate the thrust produced per motor in kg?

Comment by Ellison Chan on February 18, 2012 at 10:36pm

Well, 850kv @ 20amp would probably generate over 1kg thrust per motor.  So your flying weight with the gopro is over 4 kg?  That does seem like a heavy drone.  If you're really over 4kg, you should probably be looking at a hexa or octo.  Since if you try to find motors for a quad that can lift greater than 4kg, you're talking about expensive motors and escs.

Comment by Adli Shahnaz on February 18, 2012 at 10:06pm

Elison, 850kv with 20amp ESC. I just transferred from the normal jdrones ardu frame to the X1 frame. Should I change the motors and the ESC?

Comment by Ellison Chan on February 18, 2012 at 10:02pm

Adli, what kv motors come with that frame?  12x45 sounds like they're big for a 20amp rated motor..  Adding another battery in parallel will likely make the lifting ability worse, since there will be the extra weight of the battery added to what you say is an already heavy drone.

Comment by Adli Shahnaz on February 18, 2012 at 9:46pm

Hi guys,

Can I add an extra battery to the arducopter?What do I need to do in order to do that? Help please. Right now, I am using the JDrones X1 frame with 20amp of motor and 12 x 45 props. It seems  a little bit heavy to lift with gopro attached to it. Thanks.

Comment by Sayan Andriyanov on February 4, 2012 at 12:11pm

Adli, is your camera fixed or it dangles?

Comment by Gage Halverson on January 29, 2012 at 5:55pm

I have the official 900Mhz telemetry kit soldered it myself I've tried using x-ctu and unbricking and reloading the firmware 

i called diydrones store and the lady didn't know what to do 

i found this posts and i kinda tried it (not soldering the wire on but just holding it therehttp://diydrones.com/forum/topics/xbee-900-kit-lights-but-no-telemetry?xg_source=activity&id=705844%3ATopic%3A645885&page=2#comments

and http://diydrones.com/forum/topics/xbee-pros-unable-to-talk-w?commen...


3D Robotics
Comment by Chris Anderson on January 29, 2012 at 4:06pm

Gage: You'll have to post info on your whole setup. If you're not using the official 900Mhz telemetry kit, I won't be able to help you. (I've never used anything else)

 
 
 

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