|
Title: Heavy Lift Quad config for 2kg payload Post by: mith on January 20, 2014, 10:54:24 PM I'm looking to build a heavy lift quad to support payload of upto 2 kg using the following parts
I found this config on web ;D Turnigy HAL frame NTM Pro Drive 3530 motor x 4 Turnigy 9 x 4.7 props Hobbywing Pentium 40 amp ESC x 4 2650 3S1P Turnigy MultiWii Pro with GPS controller board I would like to know if the following config would work or not ???. Any suggestions /feedback are most welcome :hatsoff:. Title: Re: Heavy Lift Quad config for 2kg payload Post by: sandeepm on January 20, 2014, 10:59:28 PM Go for hexa instead of Quad
Title: Re: Heavy Lift Quad config for 2kg payload Post by: mith on January 20, 2014, 11:00:58 PM I cannot due to budget limitations. Looking for an under 20K quad for the task.
Title: Re: Heavy Lift Quad config for 2kg payload Post by: Abhishek Goudar on January 21, 2014, 12:25:38 AM RcBazaar has a hex combo (Hiller 550 hexacopter Super combo ) for just under 13K.
http://www.rcbazaar.com/products/2302-hiller-550-hexacopter-super-combo.aspx (http://www.rcbazaar.com/products/2302-hiller-550-hexacopter-super-combo.aspx.) The remaining accessories viz. a 6ch radio and a LiPo (3S 2200 mAh) can be bought within your budget. This is assuming that you do not want any other additional accessories like FPV gear. mod edit link fixed Title: Re: Heavy Lift Quad config for 2kg payload Post by: mith on January 21, 2014, 08:46:38 AM Will this Hex be able to take that payload? Title: Re: Heavy Lift Quad config for 2kg payload Post by: Abhishek Goudar on January 21, 2014, 09:53:22 AM Well as per the data provided, each motor provides a thrust of 750gm with a 10 X 4.5 prop. So the 6 motors together would provide a net thrust of about 4.5kg. Subtracting the weight of the frame, the LiPo and all other electronics on board, should provide you with a net thurst of about 2.7-3.1 kg.
The senior members on the this forum will probably validate the data and rectify any miscalculations on my part. I too am a beginner :). Best of luck :) P.S: Thank you moderator for redressing the link. Title: Re: Heavy Lift Quad config for 2kg payload Post by: mith on January 21, 2014, 01:38:01 PM Thank you Abhishek.
Title: Re: Heavy Lift Quad config for 2kg payload Post by: Abhishek Goudar on January 21, 2014, 06:27:08 PM You are welcome mith. Hope to see your build log soon :)
Title: Re: Heavy Lift Quad config for 2kg payload Post by: Shehwar on January 21, 2014, 06:36:59 PM Looking forward to the build... ;D :thumbsup: :thumbsup:
Title: Re: Heavy Lift Quad config for 2kg payload Post by: chetanmayekar on January 22, 2014, 12:53:59 AM on thumbrule your calculation will work. but efficiency varies project to project ...
btw wht is your payload. ? Is it go pro with brushless gimble or DSLR itself. you will definitely need bigger battery pack. else it will not last .. ecalc.ch may be useful.. Title: Re: Heavy Lift Quad config for 2kg payload Post by: chintal on January 22, 2014, 10:01:52 AM Guys i am not sure but i think while calculating thrust of a motor at hover only 50% of its actual thrust is calculated so if in specs it is written that a motor gives 1000grms of thrust it is at full throttle
So u should only count the thrust as 500 grams so that ur copter will hover at 50% throttle and u can fly it perfectly Title: Re: Heavy Lift Quad config for 2kg payload Post by: Abhishek Goudar on January 24, 2014, 03:49:05 PM @chintal: Thank you for the info. Based on your premise i was wondering if the thrust was a linear function of the throttle ?
Title: Re: Heavy Lift Quad config for 2kg payload Post by: Shehwar on January 27, 2014, 06:00:20 PM thrust is a quantity related to motor. and any actuator does not have a linear function. according to my presumptions...thrust and throttle are related by the quantity of RPM.(as throttle is increased the RPM increases and thus causing an increase in thrust till the max rpm).
and dynamics states that thurst is proportional to RPM squared. this is just my theory. Title: Re: Heavy Lift Quad config for 2kg payload Post by: chintal on February 01, 2014, 09:52:38 AM Well thrust and throttle at default are equal
For eg throttle at physical 50% gives signal to receiver of 50% then then motors will half half of its total thrust While in the case of a phantom Its programmed in such a way that when u give more the 50% throttle it goes up At 50% it tries to maintain its height And below 50% it comes down The speed of going up or down depends on the amount of throttle deviation |