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ArduCopter User Group

Discussion group for ArduCopter users

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ArduCopter Pixhawk HITL

Started by Tweeter. Last reply by Jani Hirvinen yesterday. 1 Reply

Hey All,Is there currently support for an ArduCopter Hardware in the loop on the Pixhawk?Thanks!Continue

APM 2.6, AC 3.1.5 - Loiter mode issue - found loose GPS battery and terminals inside 3DR gps casing!

Started by PF. Last reply by PF on Tuesday. 10 Replies

Hello,My HL octo is flying great with APM2.6 (w/ 3DRuBlox w compass) and AC3.1.5, but I have challenges in loiter. I can take off and enable loiter. Then the octo will stand perfectly steady, for…Continue

Sonar for walls

Started by Newtoon. Last reply by Newtoon on Tuesday. 4 Replies

Hi everybody !For my next project, I would like to build a quad capable of not a hitting a wall while climbing (to follow a building for instance) and not the ground, like what this guy did …Continue

Tags: sonar

Landing Gear Servo choice?

Started by Mark Aylward. Last reply by Artem on Tuesday. 8 Replies

Hi Folks,I have a foldable landing gear for my OCTO but only manually.  I would like to buy a servo to drive the gear up and down. Naturally it needs to be light and it should not need to be very…Continue

Tags: limits, travel, Gear, Landing, Servo

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Comment by Rui Manuel Cravo Marques on February 24, 2012 at 6:20am

Chris Gough, yes me too. Correct me if I'm wrong, but have you tryied to push a car ? It has about 2000kgs, are you making that force ? I seriouslly doubt that 1000gr of thrust in spec sheets would be lifting capability but more "suited for a 1000gr airplane model", so it accelerates untill it has a speed where air can sustain the weight. I see spec of motors with 1200gr thrust with a 10" prop... put 4 of this on a quad and see if you can lift 4800gr :)


Developer
Comment by Marco Robustini on February 24, 2012 at 5:01am

Ecalc work fine, when I designed my X8 got it right:

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?

 
 
 

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