Uninformed question about Iroquois Class Destroyer

[solardave]

"Smoke from Tribal class destroyers"
This is a normal occurence during harbour movement.  What you are seeing is unburned fuel from the Mains turbines.  The two Pratt and Whitney FT4's as well as the two cruise turbines, Pratt and Whitney FT12's since replaced by Allison K570/571 turbines are all running. I believe that all engines must be running during harbour moves for safety reasons.  The FT4's do not have good combustion characteristics at very low power settings.  There are no General Electric LM2500's onboard Tribal class ships.  There are however, three Solar Turbines Inc. 750KW turbine generators and one Allison/ Detroit Diesel 1500KW diesel generator onboard.  Former Solar Turbines Canada Ltd. FSR.
Per Ardua ad Astra

 

[Cloud Cover]

Good stuff. Thanks Dave.

 

[Good2Golf]

Oops, my bad on mentioning LM2500's in the same breath as Tribals...should have remembered the FT12's.  Mind you, I didn't know that the FT12's had been replaced by 501/570/571's...funny sometimes to think that an engine (K501) in a ship was derived from an engine (T56) that's still strapped to our 40-year old Hercs... 

Cheers,
Duey

 

[Imprezzed]

"Smoke from Tribal class destroyers"
This is a normal occurence during harbour movement.   What you are seeing is unburned fuel from the Mains turbines.   The two Pratt and Whitney FT4's as well as the two cruise turbines, Pratt and Whitney FT12's since replaced by Allison K570/571 turbines are all running. I believe that all engines must be running during harbour moves for safety reasons.   The FT4's do not have good combustion characteristics at very low power settings.   There are no General Electric LM2500's onboard Tribal class ships.   There are however, three Solar Turbines Inc. 750KW turbine generators and one Allison/ Detroit Diesel 1500KW diesel generator onboard.   Former Solar Turbines Canada Ltd. FSR.
Per Ardua ad Astra

You are right on all points. All engines must be up and running in case of failure. As for the smoke, it's a common occurance in the class. Athabaskan sometimes smokes like a chimney.

 

[TAS278]

I would like to point out as well that all ships have a gearbox. It would be terribly inefficient to shut down an engine to switch to another. Smoke is a very normal thing and it doesn't mean it is come from the GT's. Could be from the generators. They could be doing some engine maintenance. There are many, many scenarios. All said; this thread turned into quite the discussion about IRO. Well Done! HEh