Heavy Lifters - where are we up too?

[KopterX]

This is under the news section, the specs posted seem obsolete.

"30/3/2012 Skyjib 8 new center section The skyjib 8 has been upgraded to further strengthen the center section, now tested to 500 Kgs, the new construction also stiffens the booms laterally. Please contact Droidowrx if you are a skyjib 8 owner and want this upgrade."

They may referred to structural breaking point of the center section, which does not necessarily modify the AUW.

The booms alone, if they are quality composite, may stand up to 500-700KG applied to a 500mm long tube.
Here is a video about testing a CFC tube: http://www.youtube.com/watch?v=FsopuX_KsVM
So if the central section is not holding at least 500kg it will break before any of the booms.

Both SkyJib8 and CS8 will probably will hold easy up to 400kg weight, suspended from motors and with the load on the center.

However, a structural breaking point at this weight is overkill because there is no heavy-lifter multirotor that can accelerate more than 2.5G straight up.

Supposing we have a multirotor that have a 16 kg AUW (which is the normal AUW of a of a heavy-lifter with a RED EPIC setup), at 2.5G acceleration, it will weight 40KG. This is 10 times less than the 400kg structural limits. Unnecessary strength, detrimental to airframe weight.

 

[remyd]

Thanks Kopter X - so what are some of the specs of the current heavy lifters that you mention?