The take off and landing part would be separeted so the lenght doesn't need to exceed more than 200m.
The problem is that to get it shorter you have to make it much wider, which when it comes to operating in international shipping lanes and of course most ports, including canals and dry docks it is easier to handle a long ship than a wide ship because long ships are actually much more common than very wide ones which are limited to oil rigs or radar rigs for ABM systems...
As for larger ships like an aircraft carrier, why not use nuclear? Since nuclear engines from Russia work well.
They have already invested a lot of money developing new nuclear power plants for big ships... they have not actually operated that many nuclear powered surface ships, but their future will be full of them.
So are you going to put ships into the slipways, therefore, preventing the construction of other ships and delay work.
Those other ships are civilian ships and they can wait. They need to expand their capacity to work on large ships anyway if they are going to build big ships for the Russian navy and large civilian ships then they will need a lot of large docks... land based and floating to be able to handle them in the future... gotta start some time.
Welcome to shipbuilding, The loss of PTD-50 was large for Russia.
If it was such a loss, then they can build another four of them... two in Russia and give the contracts for the other two to South Korea and China... PTD-50 wasn't made in Russia and there is no reason why its replacements need to be, but it would be useful work for a Russian shipyard to build nonetheless.
I seem to remember the PTD-50 was made in Sweden in the 1980s or something, so it is time to build a new one anyway.
Nuclear ships carry back up diesel or gas engines if I'm not wrong.
They do, but your main propulsion is the important thing... if your backups fail your primary engine should meet all your power needs until the smaller backup propulsion systems are sorted... it is the opposite of that that is the problem.
People somehow imagine that if you have enough of flat land next to the shore it can be used as shipyard xD
Of course not, but then it is not just going to happen on its own either... if they want Carriers then they need big ships, if they want to be a global economic power that can continue to say no to the US and EU and do what you like then you need some large ships in your navy... it doens't matter how many Zircons your corvettes can carry, it is about endurance and range and operating on the other side of the planet with minimum support.
And it doesn't need to be as expensive as the US makes it appear.
I only remembered that Kirovs has both, nuks and turbines.
At the time they didn't have nuk power plants for surface ships with enough power so they added gas turbines to boost speed above the 18knts the nuke PP could manage.
These days they have rather more powerful and rather more efficient NPPs that wont need to be refuelled over a 30-40 year operational life period which makes them much cheaper to operate.
Their new breeder reactor designs means you can put spent nuclear rods around the nuclear pile of a running breeder reactor to turn it back in to reactor fuel that can be used again... in other words the spend fuel rods can be reused/recycled...
It would be good, anyway to build a new navy shipyard near murmansk with a large enough drydock AND to get a new floating drydock (the PD-50 was build in 18months in two swedish shipyards and then welded.together (the main shipyard went bankrupt in 1989, btw)). Moving such a big drydock could be quite problematic, and PD50 was damaged on its first voyage to murmansk, so asking.the chineses or the koreans to build it and.then.transfer it could also be risky. Maybe Sevmash in severodinsk or the Rostec shipyard in murmansk could build such a floating drydock?
Murmansk could have two made and SK and China could make one each for the Pacific fleet...
And are basically only ships ever with such propulsion.
It was quicker and easier than developing a new reactor with enough power.
I seem to remember the reactor is a modified sub reactor and not originally designed for very large ships...
That shipyard in Sweden was quite big and almost without orders, so it's possible that they got a good deal.
I would suggest they would get a good deal from quite a few shipyards in Europe... but I really wouldn't trust them these days after the Mistral fiasco even if Russia did end up ahead they didn't get the ships they wanted.