atomic's ballistic Y6

[atomiclama]

After my last attempt of building my own multi went surprisingly well, I think it is time for something silly.

I have always fancied the idea of Y6, redundancy, extra power with not so much extra weight and I';ve heard good things about them in the wind. So why not.

First motors, easy, seen a few recommendations for them and general good comments so why not.
http://www.banggood.com/Wholesale-SunnySky-X2212-KV1400-Brushless-Motor-For-RC-Models-p-60577.html

Now I have heard a lot about the inefficiency of the coaxial set-up but wanted to find out for my self the numbers.
Also what the motors will pull with the HQ8x4.5 props I had lying around.

Problem is I only have one spare ESC oh well lets see what one motor can do.

First test, just see what the motors pull, I';ll redo the rig with some scales to get the thrust later.
Luckily the lab at work has 2x 50A stabilised power supplies  ::)



Full whack 30A @12.6V 378W  That';s abit more than from the table.

Now to start ordering the rest of the parts.  ::)

[flybywire]

Looks like that';s part of the ';vice quad';!



Soz, couldn';t resist.

[guest325]

Told you those motors were good, it';s going to go like a rocket!!!

[barneyg]

Apparently Sunnysky rate their motors with seriously flexible props ... it results in a very low current draw, if you use an even vaguely stiff prop the current draw will sky rocket.

[guest325]

Yes,  I';ve noticed that,  one reason why I always use 30A esc';s with them.

[atomiclama]

Looks like that';s part of the ';vice quad';!



Soz, couldn';t resist.

There';s a report to moderator link, can I use it for bad puns? 

[atomiclama]

Told you those motors were good, it';s going to go like a rocket!!!

Yeah hardly any vibration straight from the box aswell.

I tried holding onto the arm, got to about 1/2 power before I bottled it and found the vice.
Could be a hand full. But fun I hope.

[flybywire]

There';s a report to moderator link, can I use it for bad puns? 

Hmm, I love ';pun-ishment';.   

[guest325]

What size props are you using,  I would recommend 8*4.5/4.7 should fly very nicely, my tricopter on that setup at an all up weight of just over a kg was ballistic;  yours with 2*motors but more weight should be very entertaining!  You will need about 5000mah to get decent flight times but you can get away with 25C I think.
Zippy compacts are the best power to weight ratio I';ve found - thinking about it if you';ve got 3S2200';s you could parallel them up to try it out.

[atomiclama]

I';ll start with HQ8x4.5 as I already have a few of them in my box of bits and take it from there.

Battery wise  seeing as though I';ll need ~180A @ full power I was thinking of paralleling up my 1400 40/80C lipos, won';t last long but don';t think I';ll be able to handle it for long.

Need to trickle the kit in under the radar. Bigger lipos in the future.

[atomiclama]

really need to spend some time on this.

I have 4 motors and 3 ESC sitting in my draw.

What I plan on doing is: -

Knock up a test rig to see what thrust, current draw and efficiency I';m going to get from the setup.

Find what ratio I need to run the upper and lower motors at to even the load. I can then modify cleanflight mixer to match.

Compare BlHeli, SinmonK and WiiESC all with active braking enabled.

If I get through all that I might get round to putting into the planned Y6

[Ynot6]

my part built Y6 has emax 2213 motors with 1045 props.