Hmmm...I guess we will have to wait and see the actual specs.
Foxtrot Alpha is then WAY, WAY off on this.
Be interesting to see if China is wanting something to operate off of LHD type vessels.
China's transport, tanker & heavy lift aircraft
- Thread starter Totoro
- Start date
Foxtrot Alpha is then WAY, WAY off on this.
Be interesting to see if China is wanting something to operate off of LHD type vessels.
Well we already have consistent first hand accounts that it is a 38 ton class take off weight helicopter.
Foxtrot alpha writes some good stuff on US and european defence developments but are not as good for Russian developments and poor for Chinese ones. It's not really a surprise that they have misread this and jumped the shark a little bit.
Not necessarily more stable or better lift.Question, if the Mi-26 type would have a co-axial rotor would it make the helicopter more stable and lifting easier?
They would alleviate the need for the tail rotor to compensate for the centrifugal force.
Both systems can be efficient and stable...and are in use.
TerraN_EmpirE
Tyrant King
well there was that report of a joint Ruso-Sino megachopper a while back. this could be part of the cause of the confusion. as is 38 tons for a chopper is nothing to sneeze at. remember the empty weight of 62,170 lb 31 short tons.
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TerraN_EmpirE
Tyrant King
here is the problem for a mega lifter with coaxial rotors. the bigger the chopper the bigger the rotors. the bigger the rotors the more they flex when you look at Mi26 it's rotor is flexing about equal to the height of a full sized medium lift helicopter. now if you coaxial it you can shave the length of the rotor some but not by much. so you have now two massive sets of counter rotating rotors flexing at each other. so unless you build a really really really tall rotor mast chances are that they are going to hit each other and disaster. you would need a exceptionally rigid rotor system to allow for a mega coax chopper.Question, if the Mi-26 type would have a co-axial rotor would it make the helicopter more stable and lifting easier?
now a coaxial tilt rotor might be possible for such as you would have four much smaller rotors.
another option that has been studied is a tandom rotor like a mega sized chinook
The Ka-28 has the reputation of being a better lifter than a single rotor helicopter of the same power. So coaxial rotors make sense. But remember how long is the distance between the rotors in the Ka-28.
When going for a large coaxial rotor helicopter you can reduce the needed rotor mast length by combining a large multi blade upper rotor, but one a bit smaller than that for a single rotor helicopter, with a lower rotor with more blades and a smaller diameter. The two rotors will so absorb the same power at the same input moment for moment equilibrium and provide about the same lifting force. The tip speed of the lower rotor will be the same or a little lower than that of the upper rotor.
wtlh
Junior Member
I have heard somewhere that a Ka-28 crashed due to the two rotors colliding during a high-G manoeuvre (pilots ejected safe). They "fixed" the problem by putting a restriction on the allowed manoeuvring limits.
If the pilots ejected it was a Ka-52. And for these high-G manoevres is part of their way of life so the restriction must be a temporary fix awaiting a permanent solution.
wtlh
Junior Member
I am sorry, it was a Ka-52 attack helicopter indeed.