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Sukhoi Checkmate (Su-75)


Lightweight 5th Generation Fighter Proposal


Russia | 2026



"The export-minded Sukhoi Checkmate is an all-modern lightweight fighter offering from Russia with inherent stealth characteristics."



Authored By: Staff Writer | Last Edited: 11/15/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
The Sukhoi "Chekcmate" 5th Generation lightweight stealth fighter is the latest combat aircraft offering from Russia, the entry viewed to be a low-cost, stealth-minded offering by Russia for interested export parties. The design is sponsored by Rostek State Corporation (UAC) and was teased in the days leading up to the MAKS 2021 air show outside Moscow. The aircraft appears to borrow design lines from both the American Lockheed Martin F-35 "Lightning II" strike fighter and the Russian Sukhoi Su-57 "Felon" multi-role fighter, both featuring inherent stealth characteristics as well as 5th Generation classification.

At its core, the fighter in question is of single-seat, single-engine configuration with proven external stealth characteristics including fuselage chine running from nose to tail. The cockpit is seated aft of a short nosecone, presumably shrouding an all-modern radar unit. The fuselage is deep, tapered at the nose and tail ends, and assumed to house an internal weapons bay or bays. Interestingly, the air inlet is fitted ventrally, allowing for clean air intake to the turbofan within the middle-aft of the fuselage (the Lockheed F-16 "Fighting Falcon" and Eurofighter "Typhoon" multirole types both feature this design quality). The new fighter also bears some similarities to the Boeing X-32, a prototype strike fighter which unsuccessfully competed with the X-35 for the role eventually fulfilled by the F-35 Lighting II design. The exhaust port of the engine, bookended at the rear of the fuselage by the tailfins, is circular.

The mainplanes are of relatively small-area delta shape, negating the need for traditional horizontal tailplanes. The tailplanes featured are outward-canted, believed to be all-moving, and cover the role of vertical and horizontal planes seen in more conventional fighter designs.

Estimate performance figures indicate a maximum speed beyond Mach 2.0. Gross Take-Off Weight (GTOW) is assumed to be in the 20 ton (short) region. Comparatively, the F-35 reaches speeds of Mach 1.6 at altitude and sports a gross weight of 25 tons. The F-16 Block 50/52 aircraft has a maximum speed of Mach 2.05 and a GTOW of 13.25 tons. As such, the Checkmate may feature performance and battlefield capabilities somewhere between this 5th and 4th (respectively) fighter designs.

It is accepted that the Checkmate aircraft on display at MAKS is a full-sized mockup and not a full-fledged, flyable prototype. Additionally, base on the tail number on display, the fighter may carry the official designation of "Su-75" in service.

Named prime candidates for the Checkmate appear to include Argentina and Vietnam who both field an aging feet of primary 4th Generation (or older) fighters. India always remains in the running for new Russia fighter types as well while the Checkmate may very well be used as a lightweight counterpart to the heavier Su-57 for the Russian Air Force, as the Mikoyan MiG-29 "Fulcrum" has been to the Sukhoi Su-27 "Flanker" series for decades.

NOTE: Structural dimensions and performance specifications showcased on this page are estimates on the part of the author. Data will be updated as new information allows.

Content ©MilitaryFactory.com; No Reproduction Permitted.

November 2021 - The Sukhoi Su-75 is being showcased at the Dubai aerospace event, United Aircraft Corporation hoping to interest the UAE in the lightweight stealth fighter design.

November 2021 - The first of several flyable Checkmate airframes have entered the assembly phase according to UAC.

Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Sukhoi Checkmate Lightweight 5th Generation Fighter Proposal.
1 x Afterburning turbofan engine of unknown make, model, and thrust output.
Propulsion
808 mph
1,300 kph | 702 kts
Max Speed
59,055 ft
18,000 m | 11 miles
Service Ceiling
2,485 miles
4,000 km | 2,160 nm
Operational Range
70,000 ft/min
21,336 m/min
Rate-of-Climb
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Sukhoi Checkmate Lightweight 5th Generation Fighter Proposal.
1
(MANNED)
Crew
49.2 ft
15.00 m
O/A Length
32.8 ft
(10.00 m)
O/A Width
16.4 ft
(5.00 m)
O/A Height
36,156 lb
(16,400 kg)
Empty Weight
51,588 lb
(23,400 kg)
MTOW
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
RANGE
ALT
SPEED
Armament
Available supported armament and special-mission equipment featured in the design of the Sukhoi Checkmate (Su-75) Lightweight 5th Generation Fighter Proposal provided across 5 hardpoints.
Unknown. Assumed internal automatic cannon for close-in work. Also support for precision-guided drop bombs / munitions as well as air-launched air-to-air and air-to-surface missiles of Russian origin.

Also assumed: External (perhaps optional) hardpoints for additional air-launched / air-dropped ordnance.


X X X

X
X
X
X
X
Hardpoints Key:


Centerline
Wingroot(L)
Wingroot(R)
Wing
Wingtip
Internal
Not Used
Variants
Notable series variants as part of the Sukhoi Checkmate (Su-75) family line.
"Checkmate" - Base Project Designation.
Operators
Global customers who have evaluated and/or operated the Sukhoi Checkmate (Su-75). Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 0 Units

Contractor(s): Sukhoi OKB / Rostek State Corporation (UAC) - Russia
National flag of Argentina National flag of Russia National flag of the United Arab Emirates National flag of Vietnam

[ Argentina (possible); Russia (possible); United Arab Emirates (possible); Vietnam (possible) ]
Relative Max Speed
Hi: 1000mph
Lo: 500mph
Aircraft Max Listed Speed (808mph).

Graph Average of 750 MPH.
Era Crossover
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
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Image of the Sukhoi Checkmate (Su-75)
Image copyright www.MilitaryFactory.com; No Reproduction Permitted.

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
AIR-TO-AIR COMBAT
X-PLANE
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Similar
Developments of similar form-and-function, or related, to the Sukhoi Checkmate (Su-75) Lightweight 5th Generation Fighter Proposal.
Going Further...
The Sukhoi Checkmate (Su-75) Lightweight 5th Generation Fighter Proposal appears in the following collections:
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