Moderator Comment by Mark Harrison on February 3, 2013 at 1:32pm

I'll be monitoring the test flight from the bunker!

3D Robotics Comment by Joshua Ott on February 3, 2013 at 3:06pm

So will I.

Comment by wayne garris on February 3, 2013 at 3:41pm

wow very awesome going to have to poor through your website. see what else you got. whats the Kv on those bad boys? 

3D Robotics Comment by Joshua Ott on February 3, 2013 at 4:05pm

Wayne,

I'm not T-motor. I'm about to be a customer though.

Those big motors are probably pretty dang slow, a 29" prop tip will go super-sonic at ~ 8,700 RPM. Figure at least 6s(25.2v) to keep the amps somewhat reasonable, less than 350kv for sure. Probably a good bit lower than that even, it would be good to run power systems of this size at closer to 12s or something like that.

I didn't see any specs on these, but I didn't really look. My immediate needs are much more reasonable : )

Wiki Ninja Comment by Gary McCray on February 3, 2013 at 8:47pm

Considering their 4014 is 330KV  and manage about 500 watts practical continuous power and about 6 pounds of thrust I'd guess these may be under 200KV and over a thousand watts and at least 12 pounds of thrust.

Maybe not a hammock, but a 20 pound plus payload with a quad or 30+ with a Hex should be possible.

Probably manage a dozen Pizzas so the first practical (well maybe not) Pizza copter?

3D Robotics Comment by Joshua Ott on February 3, 2013 at 10:37pm

Yes Gary, that sounds like a good starting point, tacos are nothing.

As these large motors come into the market -- I look forward to seeing the batteries that can feed them.

Comment by Tobias Krieger on February 4, 2013 at 12:07am

The Hackers Q80 are about the same size/power. Maybe the price of the tigers is less?

Developer Comment by R_Lefebvre on February 4, 2013 at 5:33am

I'm definitely curious to see if a multirotor that big will work.  There's a theoretical limit where you can't accelerate/decelerate a propeller fast enough to stabilize a quad.  Will require variable pitch.  Once you go there, what is the point of a multi-rotor?

Comment by R. D. Starwalt on February 4, 2013 at 5:37am

Basically the company is saying they are not going to try to determine the operational characteristics of undesigned aircraft - 'tell us what you want, we will build the motor for it'.

Most end users (media applications) would specify flight time and payload lifting ability. Everything else, to them, is just details.

It is interesting that the design group would cast their net to the community at large. Is this smart management or something else? All the parameters to crunch the numbers are in motor design software. They just want to know how many motors they can make at that size. Is there a real market for them?

-=Doug

 

Comment by John Moore on February 4, 2013 at 8:26am

@R.D.

I think its a smart move for the company to not assume it knows what the people want, but I think a few hours on RCGroups could give them all of the infor they needed. Right now there are a quite few active threads on rewinding motors for various uses.

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