Wednesday, October 5, 2022

Bell To Downsize Unmanned V-247 Tilt Rotor For US Navy’s Future Vertical Lift-Maritime Strike Program

The United States (US) Navy’s Future Vertical Lift-Maritime Strike (VFL-MS) program has led Bell to resurrect the unmanned tilt-rotor V-247 Vigilant, which will entail the company undertaking massive structural changes to drop weight and rotor size for fitting inside Arleigh Burke-class destroyer hangars.

Originally designed for the US Marine Corps’ Marine Air-Ground Task Force (MGTF) Unmanned Aerial System (UAS) (or MUX) program, the autonomous tiltrotor is required to fit in the same space as an MH-60R, while the company explores and tests cheek, internal weapons bay, belly, or wing pylon missile options.

Having brought down its weight from 13,607 kilograms to 12,700 kgs by primarily reducing the excess fuel capacity for the MUX program, the 247 is expected to greatly enhance a frigate or a destroyer’s maritime and land strike capabilities, with the autonomous operation allowing greater flexibility in loiter time and endurance.

Interestingly, Bell’s tilt-rotor V-280 Valor along with Sikorsky’s co-axial Defiant X are also contending for the manned version of the VFL-MS, called the Future Long-Range Assault Aircraft (FLRAA).

Vigilant’s rotor blades and nacelles have been “right-sized” to carry a smaller, lighter fuselage that meets the Navy’s need for an unmanned maritime strike capability. Bell image

Bell has meanwhile displayed full-sized mock-ups at defense exhibitions with various configurations of underwing missiles and bombs like the AGM-114 Hellfire, Textron Fury glide bombs, AIM-9x Sidewinder, and Joint Strike Missile, with the MUX version coming with conformal bell pods that could carry electronic warfare equipment.

A model of the V-247 dedicated for Anti-Submarine Warfare (ASW) sporting a side-mounted sonobuoy launching array was also displayed.

Both the US Navy and US Marine Corps are fixated on establishing new and more-advanced autonomous shipboard unmanned capability. Bell’s V-280 Valor, which demonstrated a level of an autonomous flight late in its development, and Sikorsky’s Defiant X compound coaxial helicopter are potential options for a manned version of VFL-MS (Future Vertical Lift Maritime Strike), as well.

Aiming to replace the MH-60R and MQ-8C Fire Scout, the US Navy’s Request for Information (RFI) lists Intelligence, Surveillance, Reconnaissance, and Targeting (ISR&T); Surface Warfare (SUW); Anti-Submarine Warfare (ASW); Mine Counter Measures (MCM); Air Warfare (AW); Electronic Warfare (EW); Search and Rescue (SAR); Command and Control and Special Operations Forces (SOF) Support.

V-247 Vigilant Navy Missile

A Long-Range Strike And Cargo Transport

The original MUX program for which the V-247 was designed was scrapped by the USMC in March 2020, when it realized that a large UAV taking off from amphibious ships performing a multitude of tasks and configurations would rather be broken down into a family of UAVs – a very large land-based aerial vehicle and a medium-sized one for shipborne operations.

The MUX program was meant to be a Group 5 UAS/UAV, the largest of the categories with the highest altitude and greatest endurance.

An earlier rendering of the V-247 shows it firing a Hellfire missile from its internal weapons bay. Bell image

It was intended to perform command, control, and communication; early warning; persistent fires; escort; electronic warfare; reconnaissance, intelligence, surveillance, and target acquisition (RISTA); and tactical distribution.

The UAV was also to be a long-range strike and cargo transport with capabilities similar to the Bell Boeing MV-22 and Lockheed Martin F-35. That meant a range of more than 690nm (1,280km/h) and flight endurance of more than 24 hours.

The MUX program was intended to help the Amphibious Ready Group and Marine Expeditionary Unit (ARG/MEU) team operate more like a carrier strike group.

With the F-35B Joint Strike Fighter being introduced at the time, the major gap between a carrier air wing’s capabilities and what the Marines were missing was an airborne early warning capability. The Navy’s E-2D Advanced Hawkeye could not always be requisitioned for Marine amphibious operations.

MUX was thus expected to help protect USMC amphibious assault ships from long-range anti-ship missile strikes with its robust sensor and communications package, effectively serving as Airborne Early Warning platforms.

But industry representatives began warning how the USMC was expecting too many roles out of a single aircraft, which would also involve minimal logistics and transport capability.

With the VFL-MS program, the existing V-247 already has some of the capabilities, with the autonomous system simultaneously handling both the complicated mechanics of tilt-rotor control while releasing fires being the defining feature.

Featured News