TL7 Guided Missile Frigate Copyright 1995 by Douglas Cole This is a conversion of the FFG-61 Ingraham Class of US Guided Missile Frigates. It is the first in a series of conversions I will attempt. The Ingraham is an improved version of the Oliver Hazard Perry Class (FFG-7). The vessel is made out of aluminum, thus the medium body strength. I used the Harpoon Data Annex (GDW) and Jane's Fighting Ships 1991-1992 as reference material, including the number of propellors, the horsepower of the drivetrain, sensors and sensor ranges, weapons loadout, speed, and range. That the two ships come out even remotely close is a testament to David Pulver's design process. Notes for purists: I'm fairly sure the Ingraham has roll stabilzers. If not, remove them and subtract two from the stability rating. The fuel bunker has enough tankage to drive the ship over 4531 miles. However, since the FFG's turbine engine burns the same fuel as its two helicopters, extended flight operations will reduce that range. *I don't know if this is accurate!* There is an extra 9,000 cubic feet of cargo space in the lower hull. This should be enough to include up to 60,000 gallons of helicopter fuel (which is probably way too much!). The missile control radars (STIR and Mk92) should not be used as detection radars. They are probably tight beam, and if I could I'd have put a limitation on them that they can't be used for detection, only targeting. Likewise, the SPS-49 is a search radar, and shouldn't be used to guide missiles (this is not true of the SPY-1x series of phased array radars carried on the Aegis ships...but that's another story). All of the radars should be considered to be mounted on full traverse turrets, but since they're on open mounts, I didn't bother. I included a separate mess hall, bridge and CIC. It seemed appropriate. I also did not include a computer. From what I understand, this class of ships mounts several refrigerator sized computers which are probably the equivalent of a decent desktop system, except protected against salt air, temperature, and occasional missile strikes! There is plenty of room in the superstructure for a couple of these. The 100 mile range on the Towed Array is misleading. It has a direct path range of about 25 miles, but can "hear" farther than that due to convergence zone detection. When conducting a secret approach of a sub or ship, roll for detection _once_ at 100 miles, 75 miles, and 50 miles. Then, at 25 miles and closer, more frequent attempts can be made. Please, if there are any problems with the design, LET ME KNOW!!. I'll fix them. Also, if there are any enthusiastic vehcile designers out there, I could use the following aircraft systems or their equivalents: SH-60F with dipping sonar, F-14D, SH-3, SH-2, E-2C, EA-6B, F/A-18C, A-6/TRAM. However, since many of these aircraft are designed to land on a carrier, make the body of those with arrestor gear Xtra Heavy. Otherwise, if normal jet fighters are heavy, there's no difference between an F-15 and an F-14. Check out the discussion in sci.military.naval about navalizing the F-22 to see what I mean! Enjoy. Structure: TL7 Medium Body, Cheap materials. 201,850 cubic feet. HT20,646. Total compartmentalization, Bilge pumps (30,100 lbs water per min); Flotation Hull with fine lines (3532 tons max load). Power and Propulsion: Two 15,500 KW High performance Gas Turbine engines[HT 150 each], consume 44,640 gallons of fuel per *day*. Screw propellor drivetrain with 30,586 KW of motive power[HT 686]. The ship only has one propellor and one shaft. There are two external propellor pods (retractable). Each is 325 HP, and will move the ship at 9 mph. They are not used except in berthing or emergencies. Fuel: TL7 Self sealing tank [HT 6668]. 247,000 gallons of aviation gasoline provides the ship with a range of 4,531 miles as per Jane's. The hull as a fire extinguisher system (hoses and whatnot) [HT 147]. Flight Deck for Helicopter, 1400 square feet. Crew Accommodations(part 1): Standard quarters for 100 sailors. Provisions for 210 persons for one month. Mess hall for 80 persons. Environmental Control for 300 quarters (whole ship). Hull Ordance Bunkers: After Torpedo Storage: 24 Mk46 324mm torpedos [HT 603] Forward Missile Magazine. 40 Medium sized SAMs or SSMs (treat SAM's as Med SSM's...they're bigger than anything in the rules. See separate posting for the SM1-MR Block VI SAM). [HT 678]. Hull Mounted Weapons: Mk13 Mod 4 Medium SSM launcher in limited traverse turret (covers front 180 degrees) Single rail launcher, fires six missiles per minute, autoloaded. [HT 18] Two Triple Torpedo tube launchers (manual reload), Port and starboard. [HT 106]. 12 Chaff Dischargers, 12 Flare dischargers in open mounts. Hull Mounted Sensors: SQQ-89 Active/Passive Sonar (treated as combination of a long range active sonar and advanced medium range passive sonar. This is one piece of equipment, with combined HT31. SQR-19 Towed array sonar. 100 mile range [HT 58]. Superstructure: 65,000 cubic foot superstructure, Standard materials [HT9700]. Superstructure has separate fire extinguisher system [HT69]. Sensor Array: SPS-49 air search radar [Scan 26, HT63]. SPS-55 Surface search radar [Scan 24, HT 32]. LN-66 Surface Search Radar [Scan 22, HT22]. Mk92 Gunfire director (can also illuminate second target for Mk13 launcher) [Scan 20, HT12]. STIR Missile control radar [Scan 21, HT18]. FLIR (forward looking infrared) [Scan 17, HT4]. AN-SLQ 32(v)3 Combined ESM/ECM system (Combined Deceptive Jammer, Area Jammer, and Radar Detector/ Locator] [Range 556 miles, Jam rating 6]. Navigation and Communications Equipment: INS, GPS, 4 Long Range secure radios with Radio Direction finder. Superstructure Mounted Weaponry: 76mm rapid fire naval gun in full traverse turret. Autoloader. Magazine is in superstructure (not turret) and holds 3600 rounds [Gun HT43, Magazine HT 888]. Phalanx CIWS system. 20 mm 6-bar gatling gun in full traverse turret[HT25]. Also in turret is a dedicated mini-radar and Genius MiniTC, running Targeting +3 and CIWS 9, for a net to-hit of 12-. I don't know if this is the right way to do it, but it produces a hit probability in line with reality. 5000 rounds 20mm API are stored in a hopper below the turret. Crew and Accomodations in Superstructure: 5 Roomy quarters for Captain, XO, and three VIPs (other officers?). Standard quarters for 75 sailors. Space is set aside in the superstructure for the Bridge and CIC. Hangar space for 2 SH-60F Helicopters [HT 888] That's it for the superstructure. The following locations are armored: Hull: DR 100 Metal armor; Superstructure DR 25 Metal armor; DR 35 ablative armor (Kevlar) over Electronics; DR50 metal armor over Missile, torpedo, and naval gun magazines; DR45 Metal armor over Turbines and Drivetrain; DR 20 metal armor over bridge; DR 20 metal armor over 76mm gun; DR 20 metal armor over Mk13 launcher; DR50 metal armor over fuel bunkers. Improved Sound Baffling. Cargo Hold: 9,000 cu ft. Stats and Performance: Cost: $123,700,000 Loaded Mass: 3031 tons Net Power: 55KW Max Speed: 39mph (34 kts) Acceleration: 4.3 mph/sec Deceleration: 12.2 mph/sec Water MR: 0.25 Water SR: 8 (6 if no stabilizers) Size Modifier +10 Radar Signature: +10 IR Signature: +14 Acoustic Signature: +2 (or +4 with a penalty for the size of the ship while moving through the water. All those waves hitting the hull make noise).