Future High Speed Helicopter and next generation rotorcraft

TerraN_EmpirE

Tyrant King
First point, At the moment there doesn’t seem to be a drive to Blue whale or Z-X.
Z10, Z20 are still very new the latest Z8 and Z18 are as well. Because the PLA has just introduced them into inventory. It seems unlikely that we will see a sudden hard drive to replace them. Practicality and Conservative seem the drivers of PLA R&D they don’t seem the type to suddenly hang random hard turns. Even when they do they are still conservative.
Rather the drive now is to build up there numbers. Improve the existing models and technologies establish a good fleet then move when they have the basics down.

The US FVL program is done today because the US has the luxury of an established very capable fleet of system. FARA and FLRAA are the next step in that but would start out replacing decades old AH64,AH1,H60,H1 and filling the premature demises of OH58D. They build of established technologies and ideas. Part of the US driver for Tiltrotor and FVL tech is as a reaction to the Chinese drives in Sea denial of the SCS and Western pac. To try and get the ability to rapidly reenforce allied forces in the Island chains in the event of push to shove.
The PLA doesn’t have the same speed and range issues by geography and technology positioning. IE they can float across most of their potential conflict zones win a landing craft from home. It’s the difference between Global and Regional.
For them if they were to want to try and push a counter FVL capacity the next logical step would be (well yes the engine issue as in getting better engines into widespread issue, Then) rotary wing refueling. Extending the ranges of there helicopters so as to enable vertical infiltration from stand off when faced with anti ship missile systems and the like. That would extend ASW capacity in a Naval chopper if partnered with a low speed tanker like the KC130J.

Second point.
A10 and Su25 are frankly sitting in a mission role that is obsolete. Most CAS missions today and in future conflicts as well as in the recent past have not been done by A10 but F16 and FA18. A10 was designed based on the assumption of the Cold War gap conflict. That is that the Soviets would have flooded into Germany in the tens of thousands with cheap T55 tanks. These would swarm western forces who would engage in hit and run tactics to draw the Soviets back deny them build up and harass them until they could be cut off. The A10 was designed to swoop in and kill a as many T55 as possible before they were swatted by Air defense systems.
The Soviets from the other side saw it similarly that in the event of war they would be faced with trying to push deeper into Western Europe getting cut off and and sniped by western tanks at every hill. They wanted to build an aircraft that could take western tanks deep inside western lines before it was swatted by western Air defense systems.
So what’s wrong with that you ask? Once Composite armor MBT emerged, the 30 mm guns weren’t tank busting anymore the rockets weren’t that great and the missile load isn’t that impressive. Improved mobile missile systems easily spot and swat these giant mosquitoes before they can bite. Finally Multirole fighter systems with modern ATGM and multi kill tank buster munitions emerged.
Basically a F16C with an CBU97 can disable a mechanized regiment from high altitude then turn and burn.
So then A10... SU25 where do they fit? They kinda don’t. What they ended up doing is Close close Air support against infantry but even then the 20mm gun is more than enough and A10/SU25 isn’t that much more effective than a fighter. Where they fall to next is COIN. COunter INsurgency where in vs a fast mover they can loiter longer and don’t burn as much fuel. But those aren’t unique advantages as most turboprop flight trainers can do the job. Drones with substantially lower payload can also do similar missions.
This is also why you don’t see newer platforms built like A10, Su25 or Q5.
Attack Helicopters fill a slightly different place they can support troops by being part of the manouver element. They can stay with the troops can land and take off can also lay in ambush. They can also operate in extreme shifts of ground terrain like natural and artificial (cities) canyons.
In the US the MH6 and FARA are targeted to the later as well as scouting. They can place troops on the streets because of their smaller footprint as transport or bring firepower into cull de sacs. Attack choppers similarly like to hunt scouting and attacking with smaller load outs.

Point Three. The Blue Whale is a whale of a yarn and short term isn’t needed and long term might not be needed.
The US had concepts like blue whale to replace C130 but they didn’t go anywhere. The Chinese and Russians have a chopper that sits in a similar payload class to the Bluewhale, the Mi26 Halo. The Problem with the 20 ton class chopper is what do you use it for?
Infantry okay but then again any large heavy lift chopper can carry them. Look at CH47.
Vehicles? Again same as Infantry.
Armored vehicles? Not really they will either be to heavy for the lifter, or to large both demanding either second lifters to carry extra parts and assembly on site or just won’t fit. Alternatively they are often to light to actually offer more than token protection against anything bigger than an assault rifle.

So what do they do? Cargo freight primarily. But you can do that from a C130, KC390, AN12, Y9 either air drop or Short strip landings.
To get that really practical point it has to be even bigger A400M class. But the engineering on that favors a STOL fixed wing between Y9 and Y20.
So where does blue whale fit? It’s fine if you want a CH47 class lifter maybe even a little bigger something in the C27J class with higher speed but beyond that it’s just to expensive for to little outcome.
 

Mohsin77

Senior Member
Registered Member
A10 and Su25 are frankly sitting in a mission role that is obsolete.

I'll go a little further and say that such platforms were always obsolete. I read an interesting article a while ago on the history of the A-10 (i think it was on FAS.) Apparently, the A-10 was developed for a purely political and accounting reason. The US army was developing the predecessor of the Apache and wanted funding to provide its own CAS. The USAF complained to congress that CAS should belong to the air force (otherwise it would lose its CAS budget.) Congress sided with the USAF and blocked the army's project. Of course, the USAF failed to deliver on its CAS promises to the army, and so the army developed the Apache anyway, and the USAF got stuck with the A-10 lolz.

Personally, I feel that all CAS missions should be done by the army. CAS is a tactical mission and a distraction for the air force, which should focus on higher priority strategic tasks. Give the army enough gunships, guided artillery and cruise missiles equipped with cluster munitions and they can handle it themselves. CBU munitions are great, but you don't really need to risk vipers to deploy them anymore. Even artillery has guided anti-armor submunitions these days. It's much safer than sending in vipers to fly directly over enemy armor, which would be protected by SPAAGs etc.
 

Mohsin77

Senior Member
Registered Member
p.s. This doctrinal issue of CAS applies to all militaries and needs to get sorted out. It seems like there's a lot of politics involved in this issue in all countries.
 

Dishi

New Member
Registered Member
First point, At the moment there doesn’t seem to be a drive to Blue whale or Z-X.
Z10, Z20 are still very new the latest Z8 and Z18 are as well. Because the PLA has just introduced them into inventory. It seems unlikely that we will see a sudden hard drive to replace them. Practicality and Conservative seem the drivers of PLA R&D they don’t seem the type to suddenly hang random hard turns. Even when they do they are still conservative.
Rather the drive now is to build up there numbers. Improve the existing models and technologies establish a good fleet then move when they have the basics down.

The US FVL program is done today because the US has the luxury of an established very capable fleet of system. FARA and FLRAA are the next step in that but would start out replacing decades old AH64,AH1,H60,H1 and filling the premature demises of OH58D. They build of established technologies and ideas. Part of the US driver for Tiltrotor and FVL tech is as a reaction to the Chinese drives in Sea denial of the SCS and Western pac. To try and get the ability to rapidly reenforce allied forces in the Island chains in the event of push to shove.
The PLA doesn’t have the same speed and range issues by geography and technology positioning. IE they can float across most of their potential conflict zones win a landing craft from home. It’s the difference between Global and Regional.
For them if they were to want to try and push a counter FVL capacity the next logical step would be (well yes the engine issue as in getting better engines into widespread issue, Then) rotary wing refueling. Extending the ranges of there helicopters so as to enable vertical infiltration from stand off when faced with anti ship missile systems and the like. That would extend ASW capacity in a Naval chopper if partnered with a low speed tanker like the KC130J.

Second point.
A10 and Su25 are frankly sitting in a mission role that is obsolete. Most CAS missions today and in future conflicts as well as in the recent past have not been done by A10 but F16 and FA18. A10 was designed based on the assumption of the Cold War gap conflict. That is that the Soviets would have flooded into Germany in the tens of thousands with cheap T55 tanks. These would swarm western forces who would engage in hit and run tactics to draw the Soviets back deny them build up and harass them until they could be cut off. The A10 was designed to swoop in and kill a as many T55 as possible before they were swatted by Air defense systems.
The Soviets from the other side saw it similarly that in the event of war they would be faced with trying to push deeper into Western Europe getting cut off and and sniped by western tanks at every hill. They wanted to build an aircraft that could take western tanks deep inside western lines before it was swatted by western Air defense systems.
So what’s wrong with that you ask? Once Composite armor MBT emerged, the 30 mm guns weren’t tank busting anymore the rockets weren’t that great and the missile load isn’t that impressive. Improved mobile missile systems easily spot and swat these giant mosquitoes before they can bite. Finally Multirole fighter systems with modern ATGM and multi kill tank buster munitions emerged.
Basically a F16C with an CBU97 can disable a mechanized regiment from high altitude then turn and burn.
So then A10... SU25 where do they fit? They kinda don’t. What they ended up doing is Close close Air support against infantry but even then the 20mm gun is more than enough and A10/SU25 isn’t that much more effective than a fighter. Where they fall to next is COIN. COunter INsurgency where in vs a fast mover they can loiter longer and don’t burn as much fuel. But those aren’t unique advantages as most turboprop flight trainers can do the job. Drones with substantially lower payload can also do similar missions.
This is also why you don’t see newer platforms built like A10, Su25 or Q5.
Attack Helicopters fill a slightly different place they can support troops by being part of the manouver element. They can stay with the troops can land and take off can also lay in ambush. They can also operate in extreme shifts of ground terrain like natural and artificial (cities) canyons.
In the US the MH6 and FARA are targeted to the later as well as scouting. They can place troops on the streets because of their smaller footprint as transport or bring firepower into cull de sacs. Attack choppers similarly like to hunt scouting and attacking with smaller load outs.

Point Three. The Blue Whale is a whale of a yarn and short term isn’t needed and long term might not be needed.
The US had concepts like blue whale to replace C130 but they didn’t go anywhere. The Chinese and Russians have a chopper that sits in a similar payload class to the Bluewhale, the Mi26 Halo. The Problem with the 20 ton class chopper is what do you use it for?
Infantry okay but then again any large heavy lift chopper can carry them. Look at CH47.
Vehicles? Again same as Infantry.
Armored vehicles? Not really they will either be to heavy for the lifter, or to large both demanding either second lifters to carry extra parts and assembly on site or just won’t fit. Alternatively they are often to light to actually offer more than token protection against anything bigger than an assault rifle.

So what do they do? Cargo freight primarily. But you can do that from a C130, KC390, AN12, Y9 either air drop or Short strip landings.
To get that really practical point it has to be even bigger A400M class. But the engineering on that favors a STOL fixed wing between Y9 and Y20.
So where does blue whale fit? It’s fine if you want a CH47 class lifter maybe even a little bigger something in the C27J class with higher speed but beyond that it’s just to expensive for to little outcome.

I'd generally agree with you that the PLA tends to be conservative and right now is more focused on building up the scale to be a cohesive and balanced force, and focused on the problem of going from not having to having something instead of going for the most advanced equipment.

The blue whale is kind of a long shot and I'd agree that the technical challenges are daunting and it would be a very ambitious project. However I did remember that in an interview back in 2012 in Tianjin when they first unveiled the model and the 5000kw engine, the designer or chief engineer said that this engine would be used in the blue whale and gave a bunch of other performance parameters, which seems plausible as 4x5000kw would give you more shaft power than a mi-26. Funny thing is, later this model never appeared again and was never talked about again, which kinda reminds me of back in the mid 2000s when the first Blackhawk looking Chinese medium helicopter model was made public, and subsequently disappeared and then a decade later the z-20 was in testing, which makes you wonder if the blue whale project is actually being pursued cause it seems to be following a similar trend.

And I think there's still a major business case for something like the blue whale. The c-130 and y-9 both still need some sort of an airstrip to operate from and land, whereas mi-26 may match the payload of those turboprop lifters, but it doesn't have nearly the range nor speed. The blue whale will be a good combination of both, that you have nearly the range and speed of the fixed wing, but also the ability to land troops and equipment anywhere without the need for any prep. With a 20t payload, you'll be able to perhaps fit in a couple of the mengshi 4x4 or a 6x6/8x8 apcs used by the new light mechanized brigades. Think of it as the modern mechanized air assault enabler, it's like making fast deployment bridgades even faster and more tactically flexible.
image.jpeg

Also, designing common compound helicopter power train makes a lot sense. Now that wz-20 engine is in service, it makes sense to have most of the army aviation helicopters to be utilizing a common engine for parts and ease of maintenance. A heavy attack helicopter can be designed to use that engine with the same power train as the z-20 whereas future z-18L can use 3 such engines that will give it a combined shaft power approaching early versions of the chinook. If we're going for commonality for that, why not adopt the approach for fvl to develop a common compound helicopter power train for both the heavy attack heli and the medium tactical transport heli. That would save time and money.
image.jpeg

Also, the CAS mission will always be needed, the troops on the ground will always need a flying gunship whenever possible. I'd agree that in a near peer conflict the survivability for sth like an a-10 will be really poor, but it's not everyday that you start fighting a world war. Also, traditional methods of CAS performed by a-10 can be split into 2 components, the risky high speed bombing portion can be undertaken by stealthy unmanned drones such as gj-11 and the traditional loitering gunship anti-tank/fire support role can be undertaken by a low flying attack helicopter, and with a fast attack helicopter, you can increase surprise factor and survivability in an attack while increasing service range. If you think about the original marine harriers, their main role is CAS and ground attack, while China lacks an aircraft like that, but to perform that role for the marines a high speed chopper might be capable of that as well and a vtol fighter which is expensive and inefficient may never be needed.
 

Dishi

New Member
Registered Member
I'll go a little further and say that such platforms were always obsolete. I read an interesting article a while ago on the history of the A-10 (i think it was on FAS.) Apparently, the A-10 was developed for a purely political and accounting reason. The US army was developing the predecessor of the Apache and wanted funding to provide its own CAS. The USAF complained to congress that CAS should belong to the air force (otherwise it would lose its CAS budget.) Congress sided with the USAF and blocked the army's project. Of course, the USAF failed to deliver on its CAS promises to the army, and so the army developed the Apache anyway, and the USAF got stuck with the A-10 lolz.

Personally, I feel that all CAS missions should be done by the army. CAS is a tactical mission and a distraction for the air force, which should focus on higher priority strategic tasks. Give the army enough gunships, guided artillery and cruise missiles equipped with cluster munitions and they can handle it themselves. CBU munitions are great, but you don't really need to risk vipers to deploy them anymore. Even artillery has guided anti-armor submunitions these days. It's much safer than sending in vipers to fly directly over enemy armor, which would be protected by SPAAGs etc.
I agree with you that CAS should be performed by the army, it makes sense from a structural, command and organization point of view. Airforce CAS would require a airforce liaison attached to the ground unit and fixed wing aircraft competes for space and resources with the airforce's other services in a forward operating base. And helicopters used for CAS is ideal for the army as you don't need an airfield for it so and its easier to forward deploy sticking close to army units, a high speed helicopter that can approach the speed of a ww2 piston fighter can overcome traditional shotcomings associated with the helicopter and be a great CAS platform.

Btw I think the story you're referring to was the army's cancelled ah-56 Cheyenne that was meant to replace the Vietnam era ah-1, which happens to be a high speed compound helicopter. Beautiful machine, it's a shame that it's cancelled due to politics.
 

Mohsin77

Senior Member
Registered Member
Yep, it was the Cheyenne, and now I remember that the article I read was actually on the history of this cancelled project.

Also, attack choppers with top mounted radars have another advantage in that they can utilize cover and become immune to any SPAAG/SAM. Once locked on target, they can pop up and launch, then drop back down behind cover.
 
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Dishi

New Member
Registered Member
Since I do not want to start - at least yet - a new thread I think this is the best for it!


But during what event was it unveiled? ... is it just a fancy concept unveiling show or are these real proposals?
I think it’s more of a concept study than an actual project, since it’s CHRDI, their job is to study all kinds of potential design concepts for possible applications in the future, but before the military found an actual use for it and start funding them, it will most likely remain a paper project.
It does kinda resemble the electric motor tilt rotor concept show in Tianjin a few years ago.
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I think a potential high speed helicopter that could be in the works may be more similar to one of the concepts at Changhe where they actually design and build them. Scroll to the bottom of the article:

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steel21

Junior Member
Registered Member
Apparently, the A-10 was developed for a purely political and accounting reason. The US army was developing the predecessor of the Apache and wanted funding to provide its own CAS. The USAF complained to congress that CAS should belong to the air force (otherwise it would lose its CAS budget.) Congress sided with the USAF and blocked the army's project. Of course, the USAF failed to deliver on its CAS promises to the army, and so the army developed the Apache anyway, and the USAF got stuck with the A-10 lolz.
Are you referring to the Lockeed AH-56 Cheyenne?

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steel21

Junior Member
Registered Member
as future z-18L can use 3 such engines that will give it a combined shaft power approaching early versions of the chinook. If we're going for commonality for that, why not adopt the approach for fvl to develop a comm
I agree with all of Moshin and Dishi's point.

I think this is a good case where perhaps the civil-mil fusion can take the lead and create a business case before military vendors can take a proven design and stack some armor and weapons. I imagine there are extremities in the BRI project that a large VTOL / V-44can work.

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The Bell OH-58 and OH-6 are some examples that comes to mind.
 
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