Artem's Friends

  • Gyrobot
  • Mikhail
  • Julien Dubois
  • Forrest Frantz
  • Rolf Blomgren
  • Shyam Balasubramanian
  • Tommy Larsen
  • Simon Howroyd
  • Rob_Lefebvre
  • emile 'butch' alline
  • Michael Oborne

Artem's Groups

Artem's Discussions

New power module proposition

Started this discussion. Last reply by Artem Mar 5. 7 Replies

Hi everyone! I would like to list two ideas (none novice or mine) which I hope will gain the attention of our community and result in 3dr introducing some new products and functions in the apm…Continue

Tags: halleffect, hall effect, voltage sensor, current sensor, 6s

MyFlyDream AAT and APM/Pixhawk

Started this discussion. Last reply by mP1 Feb 18. 2 Replies

Hi, I am seriously considering building an antenna tracker. However after some research and sourcing all the various parts/bits and pricing it all together I get a really "hacked-together" looking…Continue

APM Output Function

Started Dec 17, 2013 0 Replies

Hey, could someone point to me where can I find APM_RC library? Also, am I correct that this library includes functions which are used to control APM output? this is what I am trying to do:currently…Continue

noob question

Started this discussion. Last reply by Artem Nov 19, 2013. 6 Replies

Hi everyone, I've just finished building a tricopter, put an apm 2.6 with external mag/gps on a self made mast very far from any interference, but close to the CG my apm is directly on the CG. done…Continue

Tags: 2.6, apm

 

Artem's Page

Latest Activity

Artem commented on Georgie xu's blog post Lego-copter
"lol, what happens when it crashes? looks a fun idea, I might re-purpose some of my son's lego :) but I think I will epoxy all the blocks together :)"
Tuesday
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"yep, same thing here!  one of the internal compass offset is around 500. "
Tuesday
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, here is a video it shows that when applied yaw other two motors either spin up or down depending on a yaw direcrion. Cranck up you volume to hear the motors: http://youtu.be/Q1TjRckOl-I"
Monday
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, any hope for an answer?"
Sunday
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Thx Terry! Some good info real life info."
Sunday
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Terry, could you share, are you running a 4s or 6s setup, also, what is your hover amp average on 17" props as well as the weight of the copter. Thank you! "
Saturday
Artem commented on Nick's blog post Custom built APM mini quad.
"it mostly helps active flight by decreasing the angle necessary for the fast flight, thus reducing chances of getting props in the view, as well as helping to decrease loading on the "front" motors, which in turns results in lesser amp…"
Sep 11
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Yew, exactly. Btw, MP mandates all CCW props starting since 3.1.5 I think this wiki page is too old. Adverse effects of the wrong direction motors are mostly visible with 15-17" props."
Sep 11
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Yes, this is what I meant. At first I tjought I had a mechanical issue and kept changing yaw servos, but than I realize that motor direction could be part od tje issue. Even on the cheapest servo I tried works fine with all CCW props, however gives…"
Sep 11
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"That is true, I believe till 3.1.2 all size of props were fine in eve all CW, however I can assure that at least 3.1.5 and 3.2 rc1-7 for 15 and 17 " props this doesn't work well as they have a lot of inertia and increasing yaw PIDs also…"
Sep 11
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, may I ask you to disable motor spool up/down on a tricopter? As I mentioned in my previous post yaw in a teicopter involves spooling up/down the moyors like on a quad/hexa/octa. In my opinion this is not needed as the tail servo has more than…"
Sep 10
Artem commented on Nick's blog post Custom built APM mini quad.
"I wonder if you are vibro isolating that FC tower? and the GPS needs to be at least couple of cm above your motors, otherwise it catches their RF noise.  very good frame design though! are you US based? "
Sep 10
Artem commented on Ralph Wu's blog post SimonK ESC with upgrade port
"and 30a for 7 :)    http://witespyquad.gostorego.com/speed-controllers/rtf-escez-30amp.html tried them..... well,   not good for the high pole count motors. these so far are the best for…"
Sep 10
Artem replied to Philip Johansson's discussion Would this be a correct placement of my antennas?
"if you twist the power cables it will largely diminish magnetic interference, also, routing the cables inside the CF tubes will help a bit with RF noise as well  (not the mag interference though, as it goes right through alum/CF tubes, but…"
Sep 9
Artem replied to Philip Johansson's discussion Would this be a correct placement of my antennas?
"my 5c   Rx near an ESC (especially if it is of the 433mhz kind) is a bad idea, all ESCs emit RF noise on the 400mhz band which atmel/silabs chipset clock speed.  vTx is fine as long as it is as far from the Rx and GPS as possible. I would…"
Sep 9
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, here is what I found regarding that imu2 madness, it happens only when I plug the battery with my LEDs on! doesn't happen when LEDs are off though and it is OK to turn them on after the pixhawk booted up. but your pre-arm checks work…"
Sep 9

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Comment Wall (3 comments)

At 6:05pm on January 29, 2014,
MR60
Forrest Frantz
said…

What is your budget?

At 6:14pm on January 29, 2014, Artem said…

this is going to be for my "dream tricopter"  and thus I will be making some saving for this purpose, so if it is under 100usd than I think I could afford them....  so far I found NX-4006-530kv motors 67g 481g @ 3.35amp theoretically 

At 6:16pm on January 29, 2014,
MR60
Forrest Frantz
said…

Also, can I phrase the question as such:

Is there a rotor (motor and prop) that generates more than 430 grams of net thrust (500 grams less motor weight of 70 grams; thrust after the weight of the rotor is removed along with the additional weight of 2 grams per inch of prop over 10"), while sipping 43 watts or less (3 amps at a 4S voltage that varies between 10 and 17 volts)?  In other words, a rotor with an efficiency of about 10 grams per watt at 430 grams of net thrust.

Is it OK to word the question that way?  If so, then a 130 gram rotor generating 560 grams thrust at 43 watts would be OK as would a 50 gram rotor generating 480 grams of thrust at 43 watts.

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