SAAB JAS-39 (A,B,C,D) "Gripen"

(Version 1.01 - Last updated: 07/16/04)
Background and RPG stats by Kenneth Olson
Artwork by Ted Nomura, Pat Kelley, Pat Thornton, Katie Gillette, Ben Dunn
Published in Antarctic Press Robotech #7 and #8

BACKGROUND

The JAS-39 "Gripen" was designed in the mid 1980's to replace the aging Viggen and Drakens fighters and provide the first "fourth-generation" multi-strike fighter to the Swedish Air Force.  As with all Swedish fighters, the Gripen is designed to use small low-tech airbases scattered around the countryside and take-off and land in less than 800 meters of unimproved automobile roadways.  The resultant fighter uses advanced avionics and the close-coupled canard wing configuration common to the multinational Euro-fighter, French Rafale, and the aborted Israeli Lavi.  The Gripen is composed primarily of a carbon-fiber composite construction which makes up 25 percent of the airframe weight.  The design is not as stealthy as some other 4th generation fighters; however, the fighters small size and reduced signature intakes have reduced its overall radar cross section.

The initial flight of the Gripen occurred on December 9, 1989 and proved so successful that the Swedish Air Force ordered 500 aircraft in light of the deteriorating global situation prior to the Global Civil War.  One year before the start of the Global Civil War in January of 1992, Eastern Co-Prosperity countries were able to persuade neutral Sweden to buy nearly 200 fighters in exchange for guarantees of territorial security.  Nearly 175 Gripens were delivered prior to the start of hostilities at which point deliveries stopped; however, during the war the Gripen showed that the fighter was equal to its contemporary light multi-role fighters such as early model F-16 and F/A-18 fighters. 

The Gripen was designed to use a wide variety of weapons from both Western Alliance and Eastern Co-Prosperity arsenals.  On single-seat versions of the Gripen, a Mauser BK-27 27mm cannon is mounted in the fuselage underneath the left air intake.  The cannon is capable of firing up to 6,500 rounds per minute with a muzzle velocity in excess of 1250 meters per second fed from an internal 120 round storage drum.  Up to  7,942 lb (3,600 kg) of external stores can be mounted on two wingtip, two wing, one centerline, and one below the starboard air intake harpoints (total of six).   Each hard point can mount short range missiles (such as the AA-8, AA-11, AIM-9, or ASRAAM), a single medium range or long range missile (such as the AA-10, AA-12, AIM-120, or AMRAAM), or up to 500 kg of fuel, equipment or ordinance.  The fighter is equipped with the Ericsson SAAB PS-05A multi-role radar in the nose of the Gripen can be operated in either high or medium PRF air-to-air search or a low PRF mode to be used in air-to-ground missions.  All modes can be selected through the HOTAS switch.

After the crash of the SDF-1 and subsequent end of the Global Civil War, the formerly neutral Sweden was an early member of the United Earth Government (UEG) and was given access to key advanced technologies from the SDF-1.  This allowed SAAB engineers to provide a second generation Gripen with advanced alloys which provide greater protection from enemy weaponry and resulted in new over-technology turbojet design with vastly improved fuel economy and thrust to weight ratios over the older models.  The PS-05A radar was replaced with an active, electronically scanned antenna (AESA) which could be mechanically gimbaled.  This allows the system to scan 60 degrees electronically and if needed an additional 60 degrees mechanically.  The newly designed JAS-39 (C,D) models entered into production in 2010 and continued until the end of the First Robotech War in 2011 during which time nearly 325 advanced units were produced.

Nearly the entire Swedish air force was destroyed during the Zentraedi bombardment of the planet and only 137 Gripens survived.  The UEG decided to upgraded all the surviving aircraft to the more advanced -C/D and this work was completed in 2015.  The Gripen saw little combat use in the interlude between the 1st and the 2nd Robotech Wars and eventually all the UEG Gripens were placed into reserve by 2027.  There was some interest at the start of the 2nd Robotech War to upgrade the remaining 75 units which had been placed in mothballs; however, the costs proved too prohibitive and the entire fleet remained in the UEG aircraft bone yard throughout the conflict.  There were several reports of Gripens being used by resistance groups during the 3rd Robotech War.  Although these reports were never confirmed, the Gripens ability to use small stretches of highway to take-off and land and coupled with the fact that the Gripen uses a conventional power plant would make the fighter desirable to resistance groups.

RPG STATS

Vehicle Type:  SAAB JAS-39 "Gripen"
Class: Multirole strike aircraft
Manufacturer:  SAAB-Scania
Crew: One Pilot (A,C),  two pilots  (B,D)
Service History:
JAS-39 (A,B): Single (two) seat multi-role strike aircraft, served with Sweden from 1992-2010 and with Eastern Co-Prosperity Sphere from 1994-2010
JAS-39 (C,D):  Single (two) seat multi-role strike aircraft, served with Sweden from 2002 until 2010 and with the United Earth Defense Forces from 2002 until 2010 

MDC BY LOCATION:

Location JAS-39 (A,B) JAS-39 (C,D)
1 Pilot's Cockpit 30/35 50/60
Front Stabilizers (2) 10 each 25 each
2 Wings (2) 25 each 50 each
2 Tail 15 30
Engine
15 each 35 each
Ventral 35mm Cannon 10 25
1 Main Body 40 80

NOTES:

  1. Destroying the MDC of the main body or the Pilots Compartment will destroy the mecha
  2. Destruction of either of the wings or tails will send the Gripen into and uncontrollable spin

SPEEDS:

MAXIMUM SPEED:
JAS-39 (A):  1100 kph  (Mach 0.9) at sea level and 2150 kph (Mach  1.97) at 30 kft
JAS-39 (B):  1050 kph (Mach 0.86) at sea level and 2025 kph (Mach 1.86) at 30 kft
JAS-39 (C):  1300 kph (Mach 1.06) at sea level and 2525 kph (Mach 2.31) at 30 kft
JAS-39 (D):  1220 kph (Mach 1.0) at sea level and 2350 kph (Mach 2.15) at 30 kft
CRUISE SPEED (max performance without afterburner)
JAS-39 (A):  1000 kph  (Mach 0.92) at 30 kft
JAS-39 (B):  900 kph (Mach 0.82) at 30 kft
JAS-39 (C):  1400 kph (Mach 1.28) at 30 kft
JAS-39 (D):  1100 kph (Mach 1.01) at 30 kft
STALL SPEED:
JAS-39 (A):  180 kph
JAS-39 (B):  190 kph
JAS-39 (C):  170 kph
JAS-39 (D):  180 kph
CLIMB RATE:
JAS-39 (A):  5,000 meters per minute
JAS-39 (B):  4,500 meters per minute
JAS-39 (C):  6,000 meters per minute
JAS-39 (D):  5,500 meters per minute 
CEILING:
JAS-39 (A):  16,000 m (52.5 kft)
JAS-39 (B):  15,700 m (51.5 kft)
JAS-39 (C):  18,500 m (60.7 kft)
JAS-39 (D):  17,250 m (56.5 kft)
MIN TAKE-OFF DISTANCE: 
JAS-39 (A/B):  800 meters
JAS-39 (C/D):  650 meters
MIN LANDING DISTANCE: 
JAS-39 (A,B):  600 meters with drag chute
JAS-39 (C,D):  550 meters with drag chute
DESIGNED G LIMITS:
+9.0 to -3.0 g
RANGE:

STATISTICAL DATA:

LENGTH:
14.1 m (A,C)
14.8 m (B,D)
WINGSPAN:
8.4 m
HEIGHT:
4.5 m
WEIGHT (DRY):
 ENGINE THRUST
JAS-39 (A,B):  1 x General Electric / Volvo Flyingmotor RM12 turbofan, 54 kN static thrust with 80.5 kN of afterburner
JAS-39 (C,D):  1 x General Electric / Volvo Flyingmotor RM13 turbofan with overtechnology, 70 kN of static thrust with 130 kN of afterburner 
INTERNAL FUEL CAPACITY:
JAS-39 (A,C):  794 US gal (3,008 liters) 
JAS-39 (B,D):  754 US gal (2,852 liters)

WEAPON SYSTEMS:

  1. (All) 1 x 27MM MAUSER BK-27 27MM CANNON (JAS-A,C only):  A single Mauser BK-27 27mm cannon is mounted in the fuselage underneath the left air intake.  The cannon is capable of firing up to 6,500 rounds per minute with a muzzle velocity in excess of 1250 meters per second.  The cannon is fed from an internal 120 round storage drum.
  2. (All) 6 x BODY/WING HARD POINTS:   Up to  7,942 lb (3,600 kg) of external stores can be mounted on two wingtip, two wing, one centerline, and one below the starboard air intake (total of six).   Each hard point can mount short range missiles (such as the AA-8 or AA-11), a single medium range or long range missile (such as the AA-10 or AA-12), or up to 500 kg of fuel, equipment or ordinance.  The JAS-39 "Gripen" could mount Western Alliance equivalent weapons, such as the AMRAAM, however as the fighter was primarily used an adversary role during the Global Civil War and subsequent use in the EBSIS, Eastern Co-Prosperity weapons are presented here.
  3. 2 x BOP-402 CHAFF/FLARE DECOY DISPENSERS: Two chaff flare decoy dispensers are located in two dispensers located in the rear of the aircraft.  Each dispenser can hold up to 30 decoys apiece with the standard load out consisting of  50% chaff bundles and 50% flares.  The type and number of each decoy is triggered manually by the pilot.


STANDARD EQUIPMENT FOR THE GRIPEN:


COMBAT BONUSES FOR JAS-39 (A,B) TRAINING:


COMBAT BONUSES FOR JAS-39 (C,D) TRAINING:


Random Hit Locations

When there is an equal chance of hitting both sides from 1D6

When there is a preferred side, roll 1D10

Gripen

FRONT

BACK

SIDES

TOP

BOTTOM

Pilot's Compartment (Main Body) 01-40 01-05 01-20 01-20 01-15
Front Stabilizers (Main Body) 41-45 06-10 21-25 21-28 16-25
Wings (Main Body) 46-65 11-40 26-36 29-60 26-60
Tail (Main Body) 66-70 41-50 37-55 61-65 -
Engine (Main Body) 71-75 51-80 56-60 66-70 61-65
35mm Cannon (Main Body) 76-78 81-83 61-63 - 66-70
Main Body 79-00 84-00 64-00 71-00 71-00


REFERENCES USED IN THIS DESIGN

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