by NavyShooter » Thu Nov 25, 2021 9:47 am
Having sailed on a class of ships that had 2x LM2500 GT's and a Propulsion Diesel Engine, I will observe that we had the ability to drive with either GTs or PDE, but not normally both at the same time. There was always a transition period where they would all be providing power, but that was usually at a relatively low power setting - ie less than 18 knots.
I will guess that having the combining gears (we called it a Cross-Connect Gearbox) to tie power from all engines in together with multiple different engine speeds - that'd be a challenge. Sounds like the design wasn't up to the challenge.
One of the 'key' design features to the LCS concept was the speed - and having all engines tie in to generate that speed made sense, but if you can't tie in one of your main propulsion engines at the same time, it limits your speed - and thus the design will be a failure.
I always wondered about the light armament on them as well - as a ship designed to go 'into harm's way' in the littorals, having something more than a 57mm up forward would be handy, and having at least ESSM capability would, I think, be a minimum for entering that kind of dangerous space close ashore.
Just my thoughts though.
Having sailed on a class of ships that had 2x LM2500 GT's and a Propulsion Diesel Engine, I will observe that we had the ability to drive with either GTs or PDE, but not normally both at the same time. There was always a transition period where they would all be providing power, but that was usually at a relatively low power setting - ie less than 18 knots.
I will guess that having the combining gears (we called it a Cross-Connect Gearbox) to tie power from all engines in together with multiple different engine speeds - that'd be a challenge. Sounds like the design wasn't up to the challenge.
One of the 'key' design features to the LCS concept was the speed - and having all engines tie in to generate that speed made sense, but if you can't tie in one of your main propulsion engines at the same time, it limits your speed - and thus the design will be a failure.
I always wondered about the light armament on them as well - as a ship designed to go 'into harm's way' in the littorals, having something more than a 57mm up forward would be handy, and having at least ESSM capability would, I think, be a minimum for entering that kind of dangerous space close ashore.
Just my thoughts though.