Lær om livet ombord på flådens flagskib under den kolde krig -
PEDER SKRAM. Fartøjet var bygget til at lede en kampgruppe af
krigsskibe, bestående af korvetter, missiltorpedobåde, ubåde og
minelæggere.

En unik oplevelse i Københavns Havn!Lær om livet ombord på flådens flagskib under den kolde krig -
PEDER SKRAM. Fartøjet var bygget til at lede en kampgruppe af
krigsskibe, bestående af korvetter, missiltorpedobåde, ubåde og
minelæggere.

En unik oplevelse i Københavns Havn!
The machinery was a so-called CODOG (Combination Of Diesel Or Gas) machinery comprising 2 Pratt & Whitney marine gas turbines and 2 16-cylinders single acting, turbocharged 2-stroke General Motors diesel engines.
The machinery was a so-called CODOG (Combination Of Diesel Or Gas) machinery comprising 2 Pratt & Whitney marine gas turbines and 2 16-cylinders single acting, turbocharged 2-stroke General Motors diesel engines.

Machinery and propulsion

The machinery was a so-called CODOG (Combination Of Diesel Or Gas) machinery comprising:

 

  • 2 Pratt & Whitney marine gas turbines type GG4A-3 - a maritime version of the Pratt & Whitney jet engine type J75 used in i.a. Loockheed U2, F105 Thunderchief and the passenger planes Boeing 707 and DC 8. The maximum output of each turbine was 22,000 AHK. The gas turbines were used at speeds in excess of 15 knots and could give a speed of more than 30 knots (app. 55 km/h). They consumed 11 tons of fuel per hour, and the total supply of fuel was 440 tons.
  • 2 16-cylinders single acting, turbocharged 2-stroke General Motors diesel engines, type 16-567D. Normal output from each main engine was 2,400 BHK at 800 rev/min of the propellers. Max speed when using diesels was 15 knots (app. 28 km/h).

Via a large gear reducing the revolutions from 5,000 to 330 rev/min each engine was coupled to a propeller shaft. At the end of each shaft a 3 m diameter propeller was mounted. Each propeller had three 900 kg bronze blades with hydraulically variable pitch. The diesel engines and the gas turbines worked together in such a way that when gas turbines were required for high speed, the diesel engines automatically coupled out to stop or idle. On the bridge and in the control room a handle hydraulically adjusted the pitch of the propeller.

 

The frigate needed a lot of electricity for turning the gun turrets, the Sea Sparrow launcher and its general consumption. This electricity was provided by five Frichs diesel generators each giving an output of 375 KW (app. 420 KVA) at 3 x 450 V, 60 Hz.

 

PESK-hjaelpemotor.jpg

One of the frigate's five auxiliary engines.