PLAN Aircraft Carrier programme...(Closed)

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Engineer

Major
A COGES arrangement (Combined Gas Electric Steam) system would be very good for an IEPS setup, particularly since this arrangement is very thermodynamically efficient, with waste heat from the Gas turbines powering the Steam generation system which simultaneously drives the electric generators.

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In theory yes, although in practice the extra power gained may not worth the amount of space such system takes up.
 

Franklin

Captain
If you take a look at the picture below you will see that there is not much room behind the island for a bomb farm. There is little room but it seems to be hard if not impossible to access. So where are they going to store the munition during flight ops ? Are they going to open the munitions elevator everytime they need it. Or are they going to reserve a spot on the main deck for it. If they do the first that's going to slowdown flight ops and if they are going to do the latter they will take away space that could have been used to spot an aircraft and also from a safety point of view its not recommended. The last thing you want to happen in a accident is a flaming jet crashing in to a pile of bombs and rockets! That could turn a disaster into a catastrophy as you can lose the ship.

Chinese+aircraft+carrier+j-15+flying+shark+fighterChina++Aircraft+Carrier+Liaoning+CV16+j-15+16+17+22+21+31+z8+9+10+11+aesa+J-15+Flying+Shark++OPERATIONALFlying+Shark+Shi+Lang+z-8+helicopter+aew++%2811%29.jpg
 
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i.e.

Senior Member
In theory yes, although in practice the extra power gained may not worth the amount of space such system takes up.

MT30 sized plant with an intercooler would be perfect choice for a carrier but china doesn't have a mature engine in that class right now.

I still like my own idea,

3 shaft with center shaft on low speed marine diesel and out two with coupled gas turbines and electric motor for feathering... no complex coupling reduction gear between the high speed Gas turbines and the low speed marine diesel.

just like the kreigsmarine would have done.. :p


almost forgot another good feature of a steam turbine plant is the thermal efficiency for a cruise and dash is pretty close.
if you couple a cruise turbine on the same shaft as a dash turbine. the gearing technology is 100 years old and it is reliable.
at cruise unneeded boilers can be turned off, with only enough steam for the cruise turbines.
at high speed, cruise turbines are clutched off and high speed cruise turbines are used.

better cruise efficiency than a gas turbine running on lower than optimum setting for cruise. and simpler gearing.

of course. space is an issue.
 

i.e.

Senior Member
If you take a look at the picture below you will see that there is not much room behind the island for a bomb farm. There is little room but it seems to be hard if not impossible to access. So where are they going to store the munition during flight ops ? Are they going to open the munitions elevator everytime they need it. Or are they going to reserve a spot on the main deck for it. If they do the first that's going to slowdown flight ops and if they are going to do the latter they will take away space that could have been used to spot an aircraft and also from a safety point of view its not recommended. The last thing you want to happen in a accident is a flaming jet crashing in to a pile of bombs and rockets! That could turn a disaster into a catastrophy as you can lose the ship.

doesnt the soviets usually arm their airplane in the hangars below then put them on deck?
something about the harsh arctic weather not been conducive for deck work?
 

Engineer

Major
MT30 sized plant with an intercooler would be perfect choice for a carrier but china doesn't have a mature engine in that class right now.
That intercooler is pretty large.

at cruise unneeded boilers can be turned off, with only enough steam for the cruise turbines.
at high speed, cruise turbines are clutched off and high speed cruise turbines are used.

better cruise efficiency than a gas turbine running on lower than optimum setting for cruise. and simpler gearing.

of course. space is an issue.
You can't turn boilers as well as steam-turbines on and off at a moment notice. They don't work like that.
 

Sczepan

Senior Member
VIP Professional
If you take a look at the picture below you will see that there is not much room behind the island for a bomb farm. There is little room but it seems to be hard if not impossible to access. So where are they going to store the munition during flight ops ? ....

Chinese+aircraft+carrier+j-15+flying+shark+fighterChina++Aircraft+Carrier+Liaoning+CV16+j-15+16+17+22+21+31+z8+9+10+11+aesa+J-15+Flying+Shark++OPERATIONALFlying+Shark+Shi+Lang+z-8+helicopter+aew++%2811%29.jpg
couldn't you store the munition in front of the Island?
 
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