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Sikorsky-Boeing SB-1 Defiant

Compound Helicopter Technology Demonstrator

Sikorsky-Boeing SB-1 Defiant

Compound Helicopter Technology Demonstrator

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
IMAGES
Overview



The SB-1 Defiant is a Sikorsky-Boeing initiative to satisfy the U.S. Army Future Vertical Lift program requirement.
National Flag Graphic
ORIGIN: United States
YEAR: 2023
STATUS: In-Development
MANUFACTURER(S): Sikorsky-Boeing Joint Venture - USA
PRODUCTION: 1
OPERATORS: United States (possible)
National flag of United States
USA
Technical Specifications



Unless otherwise noted the presented statistics below pertain to the Sikorsky-Boeing SB-1 Defiant model. Common measurements, and their respective conversions, are shown when possible.
CREW: 2
POWER: 2 x Honeywell T55 turboshaft engines driving 2 x Four-bladed main rotors in a coaxial arrangement over the fuselage and 1 Six -bladed tail rotor arranged in a "pusher" configuration.
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Armament



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Variants / Models



• SB-1 "Defiant" - Base Series Name.


History



Detailing the development and operational history of the Sikorsky-Boeing SB-1 Defiant Compound Helicopter Technology Demonstrator.  Entry last updated on 3/28/2019. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
The "SB-1" (or "SB>1") is a joint venture "compound helicopter" development between long-time helicopter-maker Sikorsky and defense powerhouse Boeing. The design is being fleshed out to satisfy the United States Army's "Future Vertical Lift" (FVL) program which has since taken over the "Joint Multi-Role" (JMR) requirement. The SB-1 technology demonstrator is in direct competition with the in-development V-280 "Valor" being offered by Bell Helicopters for the same high-speed, transport-minded Army requirement. To date (January 2019), the V-280 has been able to reach speeds near 320 mph and has been in active flight-testing for nearly a year.

The SB-1 is part of a next-generation of U.S. Army helicopters that encompasses a family of rotary-wing aircraft to undertake a variety of over-battlefield roles. These designs are intended to succeed the UH-60 Black Hawk,AH-64 Apache, OH-5 Kiowa, and CH-47 Chinook models in U.S. Army service. Commonality of parts between the new designs is also a strong suit of the family, lowering long-term maintenance and repair costs. In the end, it is hoped for a new, more mobile helicopter force to better aid elements on the ground. Sikorsky and Boeing have not teamed up on a military aircraft project since the cancellation of the RAH-66 Comanche stealth light-attack helicopter of the late-1990s / early-2000s.

At the heart of the SB-1, and other compound helicopters for that matter, is speed in a world where forward flight for helicopters is typically maxed under 200 miles-per-hour. The compound approach of the SB-1 promises twice that and doubles range in the process - this not only makes a speedier and rangier platform, it also augments general maneuverability and agility - useful for when the aircraft finds itself under fire or attempts to navigate the confined spaces of a mountainous or urban environment. One of the more notable American attempts at a frontline compound helicopter was the Lockheed AH-56 "Cheyenne" attack platform of the 1960s-1970s which was eventually cancelled after 10 units were completed. That helicopter is detailed elsewhere on this site.

The coaxial main rotor arrangement, already popular with many Russian Kamov-branded types (as in the Ka-50/Ka-52 "Black Shark" series, is used to provide the necessary lift properties while also aiding in general stability along the lateral axis. The tail propeller unit applies the required forward thrust - giving the aircraft a much improved operating speed for a helicopter. The use of a traditional main rotor blade coupled with a "pusher prop" gives such aircraft the name of "compound helicopter".




Sikorsky-Boeing SB-1 Defiant (Cont'd)

Compound Helicopter Technology Demonstrator

Sikorsky-Boeing SB-1 Defiant (Cont'd)

Compound Helicopter Technology Demonstrator



The prototype SB-1 was unveiled in December of 2018 at the Sikorsky West Palm Beach facility and ground-testing is set to follow during in 2019. A first-flight, which had been planned before the end of 2018, is also targeted for sometime in 2019 as there have been delays in bringing the SB-1 design to fruition. The product's design is influenced some from Sikorsky's previous work in the compound helicopter field - namely the "S-69" of the 1970s and the more modern "X2" (both detailed elsewhere on this site).

While the in-development Sikorsky S-97 "Raider" compound helicopter (detailed elsewhere on this site) shares an appearance and overall capabilities equal to the SB-1 Defiant, the S-97 is being developed by a separate design team at Sikorsky for a U.S. Army high-speed scout and light-attack platform requirement. The Defiant is intended to fulfill a multi, non-direct combat role closer to that of the UH-1 "Huey" or UH-60 Black Hawk series of medium-lift transports.

As with the S-97 Raider project, the SB-1 carries a fuselage similar in appearance to the Sikorsky UH-60 Black Hawk transport helicopter. This seats the two pilots at the front (behind a shallow nose cap) side-by-side in the cockpit. Aft of this position is the passenger/cargo cabin with sliding doors to either side of the fuselage. Above this compartment is the engine fitting encompassing 2 x Honeywell T55 turboshaft engines. Atop this installation is the double (coaxial) rigid main rotor arrangement made up of two independently rotating, four-bladed components with cranked tips. The fuselage then runs aft to house the pusher propeller unit. Under the tail is a ventral housing for the tail landing gear unit. The mass of the aircraft is supported through forward-set, single-wheeled landing gear near midships. The tail section also holds outboard vertical fins along wing stubs.




Program Updates

December 2018 - Sikorsky-Boeing have unveiled the new SB-1 Defiant compound helicopter. Ground-testing will follow in 2019.

January 2019 - A first-flight of the SB-1 is targeted for some time in 2019.

March 2019 - The SB-1 completed its first-flight on March 21st, 2019 at the Sikorsky West Palm Beach, Florida facility. The flight lasted around 30 minutes and encompassed basic flight maneuvers at low speed.
Media







Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed
Hi: 300mph
Lo: 150mph
This entry's maximum listed speed (295mph).

Graph average of 225 miles-per-hour.
City-to-City Ranges
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  NYC
Graph showcases the Sikorsky-Boeing SB-1 Defiant's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production (1)
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
1
1

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
Small airplane graphic
Supported Roles
A2A
Interception
UAV
Ground Attack
CAS
Training
ASW
Anti-Ship
AEW
MEDEVAC
EW
Maritime/Navy
SAR
Aerial Tanker
Utility/Transport
VIP
Passenger
Business
Recon
SPECOPS
X-Plane/Development
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Commitments / Honors
Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental x-plane aircraft
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.


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