What kind of weight could I expect to move with four AXI Gold 5345/14s, or four Hacker A50-14L 8-poles or similarly large motors?  I know the battery sizes will be heavier too.

I am trying to get help on finding info on motors, prop sizes (18 - 21"??) and overall limitations/lift requirements of motors and batteries for a 30 - 40 lb platform.  Flying time of course would be under 30 - 40 minutes.

I know this is going to get expensive as four of the Hacker motor/ESC/Battery combos is around $3300.00..  Cheaper ideas with similar power are welcomed. 

 Will the APM and mated electronics handle a platform of this size this the same as they would a 1/2 pound drone?The Freewave radio system is very interesting too.  

If I can get a reliable and stable flying platform, I will go further with all of the cool ideas that are on DIYDrones. 

Thanks in advance for assistance or help in any way.

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Well best get your COA first else you will have invested alot of money in a platform you can't use.
My Model Aircraft sUAS shall not exceed 55 pounds, for my personal recreational and educational use and will adhere to all legal standards and procedures.........

With big motors and props like you're describing I'd be worried about moment of inertia making the system response sluggish. At the very least think about variable pitch with the motors running at constant speed.


A single rotor helicopter lifting 40 lb would have a rotor diameter of around 2 m, maybe a bit smaller if you wanted to compromise efficency -> rotor disk area = 3.14 sq m. Four rotors with the same area would have a diameter of 1 m each.


http://us.vario-helicopter.biz/shop/product_info.php?cPath=23&p... should give you an idea of the scale of these things and the power required.While the link points to a scale model, its weight and flight envelope is in the class you're looking for.


Once you to large model helicopters the efficiency of a single rotor turning as slowly as you can manage is going to be an advantage, particularly if you want it to be electric.

Trying to give your german shepherd the Pixar's "Up" experience?

I am studying and trying to fill my pea brain with as much as I can but I still need a lot of help from the members here.  I will always be LOS and in standby to take control if there are failures in the equipment or electronics...

I really would like to know if a 30 - 40 lb quadrotor design/idea with four heavy duty brushless motors would be a viable choice to move a craft agile yet stable in a variable terrain environment.  I know the forums frown on certain types of discussion that may be overly aggressive so I will try to paint it to the audience so I don't get unprofessional replies.  A platform that could quickly move from point A to B above treetop level and then descend and maneuver in/around a site accurately based on pre-programmed waypoints, RSSI readings or other sensor based data.  I plan to use an old farm with several abandoned buildings and a unused dirt road. 

First step is getting a strong, maneuverable quadrotor craft that can carry some weight and still be agile and reliable.  I know the quadrotor can be agile as I've seen smaller ones autoleveling, doing monkey flips and turning sideways to go through windows and more on posted videos...


Do you mean AOC ?

This paper is excelent and full of pertinant and educated information:


I think that the idea can be brought into fruition and of course others are already light-years ahead......

Here's a really heavy lift device that I made last year. It's size restricts transport to overseas locations so I lost interest in it, but at maximum power it could lift 16 kilos of the ground. The rotors were 15"dia.x2 \ 300 watts continuous load specially wound motors. The camera mount in the forground is one of my own Carbon lightweight 5 axis that cn hold .05 degrees which when coupled with a 5D camera with IS lens can pretty much match Cineflex performance. I don't plan to take it any further. Yellow arrow is direction of flight.


Thanks for your info and input...

I am trying to get my ACAD skills up to designing a shroud like yours but only a quad and about 60 inches across the X.

I'm definitely looking into trying to design something modular too as you point out the movement would be difficult if not by air!.

The Microdrones md4-1000 is about the size that I want to go but with bigger motors.

Looks like about 20 inch props on theirs, and it has folding arms.


I am curious to know what the performance of four of these would be as far as lift and agile flying.


It says that they can push 20+ lbs each.  I figure that if a 30 lb craft would only push them to under half their limit they should be able to sustain for a while.  I need to get edjumicated on power and the amperage sucking qualities of these things before I put my foot in my mouth.

No I mean COA in the USA
Here's another, this one is a bit smaller both had dual redundancy I.e. two receivers and two FC's One in X and the other in +  14x4.7 props MK 3538 motors

awesome man....what kind of electronics, APM?


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