The PLAN LCAC Type 726 Yuyi Class

kwaigonegin

Colonel
wait! ... What are you guys measuring again? some kinda contest or something?
LOL no pun intended!

ok on a more serious note here, based on my mk 1 eyeball after seeing a few REAL LCACs in my life..... the Chinese LCAC IMHO can potentially squeeze in 2 IFVS side by side at it's widest point (i.e not other obsuction like open doors, hatches etc) BUT no more.. By comparison a USN LCAC can squeeze in 2 strykers AND a Humvee or just two Srykers, Bradleys etc with plenty or room to spare on either side.

As I've opined before, I think the ramp is a serious design flaw on the Chinese LCAC. The width and the opening/closing mechanism is much less than the actual opening of the deck. This will impeded loading and unloading and certainly make it impossible or extremely difficult to park 2 side by side on the front row on full loadout.
 

SanWenYu

Captain
Registered Member
a serious design flaw
It is not a flaw if the requirements never asked for side-by-side loading. I think that 726 is perhaps just not designed to be comparable in loading capacity to the US LCAC. Disappointing but understandable.

Not sure about the "opening/closing mechanism" though. What's wrong with it?
 

kwaigonegin

Colonel
It is not a flaw if the requirements never asked for side-by-side loading. I think that 726 is perhaps just not designed to be comparable in loading capacity to the US LCAC. Disappointing but understandable.

Not sure about the "opening/closing mechanism" though. What's wrong with it?

lej9dS1.jpg


Compare to USN LCAC where it doesn;t impede the loading and unloading process since it is flush with the main body.

I7yHbC2.jpg


Aside from the obvious it is also a hazard because it obstructs the movement of vehicles goods and can potentially damage either one if it gets hit by accident during the unloading.

I just think it is a HUGE design flaw in my personal opinion but it's just mine own. not saying I'm smarter than PLAN engineers etc.
 
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SanWenYu

Captain
Registered Member
Compare to USN LCAC where it doesn;t impede the loading and unloading process since it is flush with the main body.

Aside from the obvious it is also a hazard because it obstructs the movement of vehicles goods and can potentially damage either one if it gets hit by accident during the unloading.

I just think it is a HUGE design flaw in my personal opinion but it's just mine own. not saying I'm smarter than PLAN engineers etc.
Oh, I never thought those two things are for opening/closing the ramp. I mistook them as bumpers to keep the vehicle in center when moving in and out. Now I agree this is a really bad design. It is so obvious that I'd assume the engineers had no choice.
 

kwaigonegin

Colonel
Oh, I never thought those two things are for opening/closing the ramp. I mistook them as bumpers to keep the vehicle in center when moving in and out. Now I agree this is a really bad design. It is so obvious that I'd assume the engineers had no choice.

That's why there are old sea dogs like me around to show you the errors of your ways my young padawan.

Ok J/k .. I'll be the first to admit many of you here puts my knowledge and understanding of military matters to shame!
 

Iron Man

Major
Registered Member
They have to deflate in order lower the deck and allow the ramp to touch the ground or sand
So it is in deflated position. Because now the weight acted on lower pressure cushion causing the cushion skirt to droop
It is all logical. Gee if you don't understand I don't what will.You are definitely not technical person. I give up
Hey technical genius, the FRONT skirt is deflated, but the side skirts are definitely not deflated; we are measuring the WIDTH of the 726, not the LENGTH, so the state of the front skirt is completely irrelevant. Are you blind or what? At most you could make a case that the side skirts are partially deflated or on their way to becoming deflated, but clearly they are still infused with air in your photo and not in their fully resting state as depicted in my photo.

You make erroneous calc because you use perspective picture and not elevation view So your beam dimension 530 is incorrect
In my picture you use pixel 580 is incorrect too because you measuring drooping air cushion skirt and take it as normal inflated position

I did explain why I measure the opening because it is not elevation level and measuring chain winches on the well deck of type 71 will give you erroneous calc
I have absolutely no idea why you think this argument is supposed to help your quixotic cause of side-by-side IFV loading. If the side skirts are deflated as you claim, then fully inflated they would be even wider than they are in the photo. Second, your perspective claim is BS unless you can demonstrate EXACTLY how my lines were drawn erroneously. Third, I calculated 571 not 580, unless you somehow forgot how to read. Fourth, you are still trying to weasel your way out of accounting for your 'error' in measuring the width of the 071's well deck, an error SO obvious it strains the imagination to conceive of how you could have honestly missed that error.

I think the main function of type 726 is to carry the main battle tank to shore and nothing else the PLA amphibious APC has water jet propulsion and doesn't need to be carry by LCAC
It is one of the fastest amphibious vehicle in the world
So different philosophy from US They did their job
Oh so even though you claim that the 726 could carry IFVs and APCs side by side, now the tune is that they somehow aren't going to be used this way. LOL ok whatever you say, technical genius.

Oh, I never thought those two things are for opening/closing the ramp. I mistook them as bumpers to keep the vehicle in center when moving in and out. Now I agree this is a really bad design. It is so obvious that I'd assume the engineers had no choice.
You pointed it out yourself, it is not actually a bad design flaw if the 726 was not designed to load vehicles side by side in the first place. It is also clear from the placement of both the gate winches as well as the air vents that side by side loading is not a specific requirement of the 726. Basically, the entire configuration of the vehicle deck, from the placement of the track guides, the placement of the air vents, and the placement of the gate winches, indicates single-file loading. Could the 726 load 2 jeeps side by side? Maybe in a pinch, but I certainly wouldn't say this is something that was designed into the 726 from the beginning.

Putting our expectations and desires into another person's/team's design is not necessarily an indication of bad design on their part. The fact is that the PLAN's first generation ACV is not up to par with the USN's ACV in terms of utilizing the vessel's footprint to maximum efficiency. If this is because the 726's engines are bigger and less efficient than the LCAC, then it will hopefully be addressed by a second generation PLAN ACV and engine design.
 

SanWenYu

Captain
Registered Member
Iron man, you quoted other's words as mine.

You pointed it out yourself, it is not actually a bad design flaw if the 726 was not designed to load vehicles side by side in the first place.
Just to clarify, when I first said it is not a design flaw, I was talking about the ramp width. I still stand by that statement because by now it looks like 726 wasn't required to do side-by-side.

Later when I said it is a really bad design, I was agreeing with kwaigonegin on the ramp's opening/closing mechanism after he pointed it out to me.

Two different contexts.
 

Iron Man

Major
Registered Member
Iron man, you quoted other's words as mine.


Just to clarify, when I first said it is not a design flaw, I was talking about the ramp width. I still stand by that statement because by now it looks like 726 wasn't required to do side-by-side.

Later when I said it is a really bad design, I was agreeing with kwaigonegin on the ramp's opening/closing mechanism after he pointed it out to me.

Two different contexts.
Oops, yes those were replies to Hendrick but I cut and pasted the wrong quote title.

As for the ramp width and the ramp winches, again they aren't design flaws if the 726 is not intended for side-by-side stacking, which by its details it clearly isn't. I can easily imagine them having designed a wider front ramp with the winches spread further apart, like this (quick hackjob PS):

726 Mod.jpg

This slight modification would entail very minimal design changes to the 726 that would only involve the front end. I think this small mod would potentially allow the 726 to carry up to 9 HMMWV-sized vehicles, with 1 by itself in the far back and 4 pairs side-by-side that could be easily disembarked from the front ramp. The fact that the 726 was NOT designed this way from the beginning indicates to me that the 726 was never intended to embark any vehicles side-by-side, only single file. This does make for a very rapid egress but makes for very poor carrying capacity in exchange.
 

SanWenYu

Captain
Registered Member
Oops, yes those were replies to Hendrick but I cut and pasted the wrong quote title.

As for the ramp width and the ramp winches, again they aren't design flaws if the 726 is not intended for side-by-side stacking, which by its details it clearly isn't. I can easily imagine them having designed a wider front ramp with the winches spread further apart, like this (quick hackjob PS):

View attachment 36244

This slight modification would entail very minimal design changes to the 726 that would only involve the front end. I think this small mod would potentially allow the 726 to carry up to 9 HMMWV-sized vehicles, with 1 by itself in the far back and 4 pairs side-by-side that could be easily disembarked from the front ramp. The fact that the 726 was NOT designed this way from the beginning indicates to me that the 726 was never intended to embark any vehicles side-by-side, only single file. This does make for a very rapid egress but makes for very poor carrying capacity in exchange.
I agree that a change like this could be done and would make better use of the floor for side-by-side.

But the winches, if still sticking out of the floor, would still be vulnerable to damages from bumps by vehicles. It would probably be even more so with two columns of vehicles squeezed in.
 
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