Theoretical performance of a CH4/L-fuelled Patrol frigate (PF) in 1975

American Patrol Frigate mid 1970s design

Fuel weight 278.9 LT. Dimensions 409.7 x 41.9 x 13.6 x 15.0 (freeboard) feet. Range 4,350 (at 30 knots)-1,650 (at 50 knots) nautical miles.

Performance of a representative DFM-fuelled Patrol frigate (PF) in 1975. Displacement 3,000 light tons. Dimensions 406 (waterline) x 41.5 (waterline) x 13.8 (ship draft) x 14.2 (ship freeboard) feet. Propulsion 1 screw. Horsepower 40,000 hp. Maximum speed 31 knots. DFM fuel weight 315 LT. Cruising speed 20 knots. Range at cruising speed 4,000 nautical miles based on 10 percent fuel reserve rounded to nearest 50 nautical miles.

Patrol frigate (PF) general applicable for the next specific warfare areas:

ASMD=self protection against anti-ship missiles

ASW (P)=force protection against subsurface threats

AAW=force attribution of airborne threats

ASUW=warfare against surface ship threats

EW=electronic warfare

CDS=combat direction systems

SURV=surveillance

NGFS=naval gunfire support

MIW=mine warfare

SPW=special warfare

Principal mission characteristics

Mission: sea control task force defense

Duration in day: 24.4

Range in nautical miles: 12,000

Mission description: escort of task force to/from operation area. Five days patrol in operation area. Divert twice/day in transit for sub contacts.

Ship oporational parameters

Days in transit:

Transit day profile hours: 20

Transit day profile in knots: 20

Transit day profile in nautical miles: 400

Days in op area: 5

Op area day profile in hours: 20

Op area day profile in knots: 16

Op area day profile in nautical miles:320

Total time at speed in hours: 100

Total time at speed in knots: 16

Ship operational parameters

Days in transit: 19.4

Transit day profile hours: 4

Transit day profile in knots: 29

Transit day profile in nautical miles: 116

Days in op area: 5

Op area day profile in hours: 4

Op area day profile in knots: 20

Op area day profile in nautical miles: 80

Total time at speed in hours: 408

Total time at speed in knots:20

Source

Hydrogen. Hearings before the subcommittee of energy research, development and demonstration of the committee on science and technology U.S. House of Representatives. Ninety-fourth congress, first session June 10 and 12, 1975, p. 1027 and further