While still waiting for the TX/RX to arrive,
I started to design and build the HEXA frame for upgrade
each arm is made of 14x14mm 1mm wall square tube,
arm length: 40cm from center, 80cm from motor to motor.
center plate is 16cm dia., two 2mm thick plates.
Also, i have done weight calculations and measurements:
Frame: 470g
camera mount: 460g
motors: ~500g
battery:~500g
DSLR camera: 950g
Lens: 550g
electronics (ESC, pilot, servos): ~500g estimated
For a breathtaking scary total of 3930 GRAMS
well, that scared me a bit, i will consider:
-drilling plenty holes in the arms and everywhere i can to take material off
-using a lighter DSLR (can save max 300g)
-using a smaller swivel plate for the camera mount (though the smaller ones have much smaller center hole, thus heavier)
here are a few pics of the construction:
If the motors will allow this and that beast will take off,
i will use a 8000mAh 14.8v battery, it's around 900gr
Still have to think about / order:
- wireless USB solution for connecting the DSLR to ground
-wireless video and cheap tiny camera
- try out HK's 9050 3-blades props if they are better than the jDrones 12x45
-design landing gear
-design a swivel mount for the camera yaw axis
Comments are appreciated !
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Comments
ouch !! i just got hit by the 12x45 BLACK
and yes,
that bloody hurts.
makes you think again about ordering the composite ones.... :D
Jani, that's nice to know.
could you tell by your tests until now/ or your instincts -
would my hexa do well with 6 of the bigger motors (orange) and 12x4.5 props for a total of 4-5kg ? (900g per motor)
or will it be too on the edge and dangerous for the motors ?
when i think that these motors are designed for use with an arducopter frame about 2-2.5kg, and mine is 4.5kg, that scares me a bit, even if i have 6 motors and not 4...
and how about the composite props being better performers than the "black epp" ones ? is it right ?
We can make more tests for those motors, smaller 2830-358 motors runs really nice with 4S and 10X45 props. We are using those on our proto hexas. Bigger 2836-358 motor also supports 4S. Currently building new test bench to get even more data from the motors.
totally sounds black art...
i already ordered 6 motors and props and ESC's.
so i'll try with that,
will try to estimate if the load is too high on the motors
(this can be done by simple current measurement while the copter is hovering, right ?
Ivan,
here - 6" lazy susan
Can you give some more info where you bought (or how you made) this:
https://storage.ning.com/topology/rest/1.0/file/get/3689399096?prof...
i didnt get the kv thing yet...
after all, low kv+high throttle = high kv+lower throttle
so i better have the same speed with headroom to more throttle....
i get that there is also the power or strength - the current rating,
but if i run the 1000kv motor with low throttle, it will still have greater power than the one i have now, and will spin faster on the same throttle...
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=...
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=...
what do you think ?
ordered.
:)
could you explain ?
they are stiffer thus more resistant to the air ?
i currently have the cheaper "black" props.
do you think the "stronger" composite ones (at the same size and pitch) will give better performance ?
Justin you are right, though the bottom part of it relies on the bearing (it is mounted vertically)
will try to find the plastic ones locally to be able to 'feel' it before i get it
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