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14 mai 2013 2 14 /05 /mai /2013 16:20
Another Old Warrior Too Good To Replace

May 14, 2013: Strategy Page


In April the latest version of the Kiowa Warrior scout helicopter (the OH-58F) made its first flight. The army had wanted to buy a new scout helicopter design, using an existing civilian model. But years of evaluations led the army to conclude that the fifty year old Bell 206 model, used as the basis for the OH-58A, was still the best available. None of the new candidates were sufficiently superior to outweigh the fact that the basic Bell 206 design, as upgraded and modified since the 1960s as the OH-58, had more than kept pace with potential new rivals. So the army upgraded the OH-58D with much improved electronics (Internet Internet-like capabilities and the ability to control nearby UAVs) and pilot protection. A lot existing components were replaced with new versions that were stronger and/or more powerful. About 60 percent of the components in the F model are new. Production begins in two years and the first of over 300 OH-58Fs (upgrades or new aircraft) will enter service in 2016.


This move is made necessary because the current U.S. Army fleet of 230 OH-58Ds is wearing out. Ten years of war have hit the OH-58Ds hard. Those used in Iraq were in the air 72 hours a month while those in Afghanistan were airborne 80 hours a month. In peacetime, these choppers spend about 24 hours a month in the air. Moreover, combat use puts more stress on the aircraft. Plus there's battle damage, which included twenty destroyed in combat. The current solution is to spend several billion dollars to refurbish and upgrade the current fleet to the OH-58F standard and thus keep the OH-58 in service for another 10-12 years. It is believed that a replacement will be found and built before then, or the OH-58 will go through another round of upgrades. This has worked for other military systems (the Sidewinder air-to-air missile, the B-52 bomber and C-130 transport) so this is not a particularly daring choice. It just works.


The OH-58D has a top speed of 226 kilometers per hour, and a range of 241 kilometers. It has a mast-mounted sight, which carries a powerful FLIR (heat sensing camera) and a laser designator. The OH-58F will move the sensors to the body of the aircraft, right in front of the pilots. The OH-58D is lightly armed, and usually only carries four Hellfire (anti-vehicle) or Stinger (anti-aircraft) missiles, or 14 70mm unguided (or guided) rockets. The upgrades don’t change the weapons load, and OH-58D users are still arguing for a new engine. Over the decades, the new equipment and weight has been added, without an increase in engine power. For a scout helicopter, the OH-58 was getting more sluggish as it got older. This was not good, even though the OH-58F is five percent lighter than the OH-58D, which helps a bit.


To help ease the workload on the OH-58Ds, the army is reorganizing its light aviation battalions, by removing some OH-58 helicopters, and adding RQ-7 Shadow UAVs. The new battalions have 29 aircraft, eight of them UAVs. All this is the result of years of experience with the RQ-7, and some tests, using UAVs as scouts for helicopter gunships, or in cooperation with scout helicopters, rather than the traditional scout helicopter (like the OH-58) operating exclusively. The tests were successful, and the army is updating its tactics as well.


In the last decade, scout helicopters have been doing a lot less scouting, having been replaced by MQ-1C, RQ-7 and Raven UAVs. The scout helicopter pilots are relieved at having UAVs take over some of the more dangerous missions. In particular, the scout helicopter pilots are glad to lose the job of going in to "draw enemy fire" (and thus reveal where the enemy is). This sort of thing has gotten a lot of scout helicopter pilots killed. But there are still situations where the superior situational awareness (two pilots with four eyes, four ears and two noses) of humans is preferable. There are some even more basic considerations. The RQ-7 can stay in the air for up to eight hours per sortie, about three times longer than the OH-58 while the new MQ-1C can do four times better than that.


The army is also equipping some of its AH-64 helicopter gunships with digital communications that enables them to see what the UAVs are seeing. The OH-58s often scout for the AH-64s, finding targets. Now the RQ-7s can do it better, by letting the AH-64 pilots see what the RQ-7 has detected. There are also systems that allow the AH-64, or OH-58 pilots to take control of UAVs. The OH-58F will have both of these capabilities. Meanwhile, it's expected that the army aviation battalions will gain more UAVs, and lose helicopters.

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7 mai 2013 2 07 /05 /mai /2013 16:20
The US Army's new CASUP-updated OH-58F Kiowa Warrior helicopter during its first flight at Redstone Arsenal in Alabama. Photo: courtesy of Denise DeMonia.

The US Army's new CASUP-updated OH-58F Kiowa Warrior helicopter during its first flight at Redstone Arsenal in Alabama. Photo: courtesy of Denise DeMonia.


3 May 2013 army-technology.com


The US Army's new cockpit and sensor upgrade programme (CASUP) modernised OH-58F Kiowa Warrior armed reconnaissance helicopter has conducted its first ceremonial test flight at Redstone Arsenal in Alabama.


Designed to address obsolescence issues in the aircraft and its sensor capabilities, the CASUP programme converts the existing OH-58D Kiowa Warriors into OH-58F models, which represents a major modernisation to the helicopter in the last 20 years.


A significant change is the relocation of the helicopter's mast-mounted sensor payload, featuring improved optics, infrared sensor, laser pointer and laser spot tracker, to the front to help pilots better acquire targets in challenging conditions.


Kiowa Warrior Training and Doctrine Command capability manager colonel John Lynch said the decision, which leaves aircraft slightly more exposed to threats, follows consideration of operations conducted over the past 12 years in Iraq and Afghanistan.


"With the linkages that are provided through communications, through manned-unmanned teaming in the current generation of aircraft as opposed to the original OH-58D in the late 1980s, and teaming with other aircraft such as the AH-64 Apache, we believe we will be able to overcome that risk and still perform the mission in major combat operation-type environment," Lynch said.


Weighing 160lb lighter than the D model, the OH-58F helicopters feature a new digital cockpit that can be customised to display mission related information, doubled processing speed, as well as separate map and data viewing capability for the pilot and co-pilot.


Meanwhile, the Redstone Arsenal has already started production of Prototype Qualification 1 OH-58F, as the army is awaiting a decision to either pursue Kiowa Warrior replacement programme, called Armed Aerial Scout (AAS), or overhaul the helicopter with a service life extension programme (SLEP).


If approved, the SLEP programme will cover production of a total of 368 OH-58F Kiowa Warriors from 2017 to 2025.

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