World's fastest military helicopters

emilymainzer

Just Hatched
Registered Member
At a maximum speed of 315km/h, the CH-47F Chinook is the world's fastest military helicopter. Below is an article showing 10 fastest helicopters:
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Hyperwarp

Captain
It seems the CH-47 and CH-53K have almost the exact same top speed 315 km/h (170 knots) -
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.

I guess tilt-rotors don't count, otherwise the V-22 can hit 509 km/h at sea level.
 

TerraN_EmpirE

Tyrant King
Well CH53K actually has to make a flight first before you can go and give it as having a true top speed. Today its still ground test.
 

Hyperwarp

Captain
^^^

true,

but it seems almost all H-53 Legacy Models have a top speed of 315 km/h.

After a bit of Googling, it seems the Ka-50/52 can reach 340+ km/h in a dive and 300 - 315 in level flight at max ceiling (depending on source).
 

Black Shark

Junior Member
^^^

true,

but it seems almost all H-53 Legacy Models have a top speed of 315 km/h.

After a bit of Googling, it seems the Ka-50/52 can reach 340+ km/h in a dive and 300 - 315 in level flight at max ceiling (depending on source).

The problem in co-axial helicopters design is they have much lower dive speed than conventional designs, due the reason that unloaded rotor blades come much closer to each other, so they are restricted to 340km/h, the actual inoffcial tests of Ka-50 was stated by Kamov company to be near 460 km/h with 8.7t weight which is the fastest attack helicopter. The major speed comes from the co-axial design which has in theory no speed limitations, further the speed can succeed over 500 km/h, not counting such upgrades which will be used in future which is basically stubbed wings angled to produce lift in speed flights like Mi-24 does and unloads the disc.

For example the Mi-24B without stubbed wings flown by Galina Rostorgueva with 341.2 km/h and todays Mi-24 with 200hp per engine more, reshaped front and with lower aerodynamic shape and stubbed wings can achieve 370km/h.

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However, FAI.org doesn't records all military records, unfortunatley.
 

T-U-P

The Punisher
Staff member
Super Moderator
Registered Member
Moved to World Armed Forces section since this has nothing to do with PLAAF
 

TerraN_EmpirE

Tyrant King
Precisely Black Shark, that's part of the reason why right now there is a surge of interest in compound Coaxial based rotary wing designs like the Sikorsky Raider, Defiant and the Kamov KA92. These offer higher sustained speeds increased maneuvering and range although the advantage of the designed maxes out in scale at Kamov's Ka92 which is a large medium lifter almost in the same category as the Hip. Anything above that and it seems to me that the most efficient configuration is a tiltrotor.
 

Black Shark

Junior Member
Precisely Black Shark, that's part of the reason why right now there is a surge of interest in compound Coaxial based rotary wing designs like the Sikorsky Raider, Defiant and the Kamov KA92. These offer higher sustained speeds increased maneuvering and range although the advantage of the designed maxes out in scale at Kamov's Ka92 which is a large medium lifter almost in the same category as the Hip. Anything above that and it seems to me that the most efficient configuration is a tiltrotor.

Indeed, the next generations of helicopters civil and military will have one big requirement to come closer to jets performance, of course not to such an extent but with twice the range,speed and payload capability and co-axial designs are today a great layout for helicopters to achieve this goals and even having further capabilities to compound or like i think even further with an engine pusher at specific speeds above 300 km/h that a seperated engine would be needed to push it and the main engines can't do the job because they are connected to gearbox and therfore rotors, meaning an adjustment in thrust is not possible with main engines, but can give a much higher potential in speed than pusher rotors, however they have also negative effects and many dificulties to make such design achievable, like significantly highered IR signature and where this engine had to be installed not to disrubt the balance of the helicopter while thrusting the airframe. However not to fetch it to far to off topic but companies are indeed interested in Raider and KA 92 designs and others will go this way most probably, too.

What about the Westland Lynx?

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Maximum speed of 324 km/h beats the Chinook by 9km/h

Actually the westland Lynx has set a record of 400 km/h in its class and it was a special version, like the most world records are performed by special versions of helicopters or at least altered in specific areas, better engines, lowered take off weight or reshaped or all together.

Another fast heliopter is the S-67 Black Hawk which was absolute astonishing when it was tested in 70s. with 3 records during its time with 335km/h than in closed circuit run with 348km/h and a special version with 370km/h and it was the only Attack Helicopter that was initially intented to be counterpart of Mi-24, a special version with cargo compartment for limited use.
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Jeff Head

General
Registered Member
^^^

true,

but it seems almost all H-53 Legacy Models have a top speed of 315 km/h.

After a bit of Googling, it seems the Ka-50/52 can reach 340+ km/h in a dive and 300 - 315 in level flight at max ceiling (depending on source).
Well, the new AH-1Z Viper that the US is now building for the US Marines to replace the Super Cobras can reach 410 km/h in a dive and speeds of 233 miles per hour.

It's cruise speed is 185 miles per hour or 296 km/h.

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