00X/004 future nuclear CATOBAR carrier thread

Kalec

Junior Member
Registered Member
Institute 704 is auctioning a trapezoid elevator, dimensions are 21m/26m * 15m. IIRC it is very similar to CVN-78 in term of size.

Maximum load capacity 238 tons.

No source for security reason.

Screenshot from public auction, dimension is in asterisk here.

1684499066643.png
 
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Kalec

Junior Member
Registered Member
Why do they even bother to publish such bidding document to general public?
Bureaucracy.

It was aimed to ensure there is no embezzlement or nepotism, but well it never works on preventing any such thing.

It took a while to archive these thing until it is taken down. Both are from official military auction website.
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3.1工作目标

为实现升降机的转运需求,进行平台本体的结构优化设计和计算仿真,完成平台轻量化研究工作。

3.2主要性能指标要求

平台主体外形尺寸:

平台形状为正梯形,尺寸约为21m/26m×15m。平台本体(不含吊点)高度不大于2.5m。吊点位置高度不大于3.4m。

平台型式:四吊点型式。

工作范围要求:

平台在6级海况环境条件下满足额定承载转运要求,局部不产生塑性变形;在9级海况环境条件下满足承载要求,局部不产生塑性变形。对极端受力工况进行仿真含抗爆及抗冲击。
3.1 Objective of the work

In order to realize the lifting requirements of the elevator, the structural optimization design and simulation of the platform body are carried out to complete the research work on the weight reduction of the platform.

3.2 Main performance index requirements

Platform body shape size:

The platform shape is trapezoidal, the size is about 21m/26m×15m. The height of platform body (without lifting point) is not more than 2.5m. The height of lifting point position is not more than 3.4m.

Platform type: four crane point type.

Working range requirements:

The platform meets the rated load-bearing transshipment requirement under the environment condition of 6 grade sea state, and the local does not produce plastic deformation; it meets the load-bearing requirement under the environment condition of 9 grade sea state, and the local does not produce plastic deformation. Simulation of extreme stress conditions including anti-explosion and anti-impact.
3.3 技术指标

1)最大承载能力:238t;

2)连续试验能力:满载升降运行不少于2300次(不低于每小时15次,每日10小时强度连续运行);
3.3 Technical requirements:

(1) Maximum load-bearing capacity: 238t;

(2) continuous test capacity: full load lifting and lowering operation not less than 2300 times (not less than 15 times per hour, 10 hours of continuous daily intensity operation);
 

Blitzo

Lieutenant General
Staff member
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Bureaucracy.

It was aimed to ensure there is no embezzlement or nepotism, but well it never works on preventing any such thing.

It took a while to archive these thing until it is taken down. Both are from official military auction website.
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They're a bit further along than I expected if they're already doing tenders for parts of the ship like this. That said maybe they're just getting ducks in a row.
 

vincent

Grumpy Old Man
Staff member
Moderator - World Affairs
They're a bit further along than I expected if they're already doing tenders for parts of the ship like this. That said maybe they're just getting ducks in a row.
Companies generally don’t issue tenders for something to be acquired a few years later because of a variety of factors: the supplier may go out of business, technology may change, requirements may change, etc.
 

ACuriousPLAFan

Brigadier
Registered Member
They're a bit further along than I expected if they're already doing tenders for parts of the ship like this. That said maybe they're just getting ducks in a row.
Companies generally don’t issue tenders for something to be acquired a few years later because of a variety of factors: the supplier may go out of business, technology may change, requirements may change, etc.
Could this be (unofficially) indicating that either the 003A CV-19 or 004 CVN-20 is already in some (early) stages of construction?
 

Blitzo

Lieutenant General
Staff member
Super Moderator
Registered Member
Could this be (unofficially) indicating that either the 003A CV-19 or 004 CVN-20 is already in some (early) stages of construction?

The "next carrier is under early stages of construction" is a big call to make, and in turn needs a lot of mutually supporting and correlating indicators and rumours to avoid jumping the gun, so no I would not interpret it that way.

Instead, file it under the mental folder titled "huh neat".
 

ZeEa5KPul

Colonel
Registered Member
This is an instructive example to illustrate the Bayesian nature of correct PLA watching. We have a piece of evidence e, these tender documents. We have the hypothesis h, the next carrier is in the early stages of construction, whose probability we are trying to determine in light of this evidence. We have an elegant formula for determining this:

o(h | e) = o(h) * P(e | h)/P(e | not h)

o(h | e)
is the odds that the hypothesis is true given the evidence, o(h) is the prior odds of the hypothesis, P(e | h) is the probability that we would see the evidence e if h were true, vs. P(e | not h), the probability we would see the evidence if h were false.

How significant this evidence is is determined by this ratio. Intuitively, this is how much the evidence moves the needle. The prior odds of the hypothesis is where the needle originally was.

I take a more optimistic view about the PLAN's procurement schedule than the knowledgeable consensus here, so my prior odds are higher than most others'. While this evidence is significant, it's certainly not a picture of modules being assembled that would overwhelm any prior. So to sum up, I think it's fair to say the needle moved in the right direction by a decent amount.
 

VESSEL

Junior Member
Registered Member
Bureaucracy.

It was aimed to ensure there is no embezzlement or nepotism, but well it never works on preventing any such thing.

It took a while to archive these thing until it is taken down. Both are from official military auction website.
Please, Log in or Register to view URLs content!
Please, Log in or Register to view URLs content!
238t is the upper limit for this testing system rather than one elevator.
 

ACuriousPLAFan

Brigadier
Registered Member
This is an instructive example to illustrate the Bayesian nature of correct PLA watching. We have a piece of evidence e, these tender documents. We have the hypothesis h, the next carrier is in the early stages of construction, whose probability we are trying to determine in light of this evidence. We have an elegant formula for determining this:

o(h | e) = o(h) * P(e | h)/P(e | not h)

o(h | e)
is the odds that the hypothesis is true given the evidence, o(h) is the prior odds of the hypothesis, P(e | h) is the probability that we would see the evidence e if h were true, vs. P(e | not h), the probability we would see the evidence if h were false.

How significant this evidence is is determined by this ratio. Intuitively, this is how much the evidence moves the needle. The prior odds of the hypothesis is where the needle originally was.

I take a more optimistic view about the PLAN's procurement schedule than the knowledgeable consensus here, so my prior odds are higher than most others'. While this evidence is significant, it's certainly not a picture of modules being assembled that would overwhelm any prior. So to sum up, I think it's fair to say the needle moved in the right direction by a decent amount.
TL; DR?
 
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