Are helicopters actually the best way to cross the Taiwan Straits?
An Mi-17 helicopter costs $18 Million and has a payload of 30 troops or 5 tonnes.
In comparison, a Type-072A LST likely costs about $14M and has a payload of approx 18 medium vehicles or 500+ tonnes.
That is based on the cost of the Indonesian Teluk Bintuni LSTs which are roughly the same length (120m) and displacement (4800tonnes) which cost $13.5 Million each.
Yes, LSTs are slower, but over the course of a day, the LST would be able to land far more troops and equipment than a helicopter.
Plus the LSTs would be a lot cheaper to operate and less vulnerable than a helicopter.
If the helicopters already exist, then yes, they might as well be used.
But for resupply and landing larger numbers of troops, more landing ships are the way to go.
The larger Type-071 LPDs look too big (25000tonnes) and expensive ($200 Million for the Thai export variant).
But the Type-072s are big enough to fit a single Mechanised Combined Arms Company.
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Looking at the existing amphibious fleet, it looks like there is enough sealift for the combat vehicles of 2 Amphibious Mechanised Brigades in the Chinese Army.
But there are actually 6 Army Amphibious Mechanised Brigades in total. Given the 2027 target to build the capability to successfully invade and conquer Taiwan, if China wanted to land the combat elements of all these Brigades on Taiwan in the single wave with LSTs, I get a figure of an extra 104 Type-072A LST for these 4 Brigades. The resupply elements would follow 12+ hours later once the LSTs sail back to Chinese ports to load up.
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In terms of Light Infantry Brigades, small landing craft like the Type-067 LCU (135tonnes) would work. My guestimate is that they might only cost $2-4 Million each. But each craft could carry a company of infantry troops along with their Unmanned Ground Vehicles. So my guess is that 24 of these LCUs would be enough to transport the combat elements of an Infantry Brigade. I see 4 Infantry Brigades assigned to the 3 Army Corps on the Coast which also have Amphibious Brigades. Plus there are many more Infantry Brigades assigned to other Army Corps.
Taiwan would primarily be an infantry/drone/recon battle because the terrain is mostly mountainous or urban.
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These LSTs and LCUs are well within the capabilities of Chinese shipyards to build quickly and cheaply.
104 Type-072A LST would have an acquisition cost of $1.5 Billion. Another 96 Type-067 LCU might cost $0.4 Billion
So by 2027, we could be looking at the combat elements for 6 Army Amphibious Brigades and 4+ Army Infantry Brigades via landing craft in a single wave onto beaches in Taiwan. You'd be looking at over 300 landing craft in the area, covered by at least 30 Air Defence Destroyers and Frigates. That's a minimum of 2000 SAMs plus overhead AWACs and fighter cover.
And then there would also be Airborne Brigades via plane and helicopter, along with Marine Amphibious Brigades via the Type-071 LPDs and the Type-075 LHDs.
Part 2:
Now, Taiwan is close enough to mainland China that in an Amp Op, the PLA could carry out airborne invasion helicopter transport out of the mainland and landing on Taiwan's beaches, as both territories are separated by a narrow, wider side. the strait is at a distance of 220 km and the closer side of the strait is at a distance of 130 km, this is close enough for helicopters to make 1-3 round trips before needing to refuel to proceed with the operation depending on the distance travelled. The Z-8 has a range of 700km, the Z-18 with 900km of range and the Z-9 probably around 560km of range.
The Z-8, based on its range, manages to make 2.6 trips before needing to refuel considering the closer side of the strait, and 1.75 trips considering the far side of the strait. The Z-18 can make 3.4 trips before needing to refuel, and can make 2 full trips on the far side of the strait. The Z-9 manages to make 2.1 trips considering the side closer to the strait and 1.2 trips considering the far side of the strait.
Considering the average speed of the Z-8, Z-9 and Z-18 helicopters at 260 km/h at cruising speed, if the distance traveled is 260 km, considering the narrowest side of the crossing, performing the calculation of the time of a trip dividing the average speed/hour by the distance traveled, the travel time is one hour, 30 minutes to arrive and 30 minutes to return, obviously I am disregarding the boarding and disembarkation of the troops that can take some time, this would make my job difficult , but in general terms, a helicopter can make a one-hour round trip from Taiwan, so much faster than amphibious ships, the agility of a helicopter and the proximity of the territories makes an invasion of Taiwan impossible if not When helicopters are used, it is actually a requirement to use them, but not necessarily the most important thing. Almost double the travel time on the far side of the strait.
In a simplistic approach, a helicopter could perform the crossing 4-5 times if the range between the naval air base was 130 km considering the side closer to the strait and 2-3 times considering the side farther from the strait.
In an Op Amp, just a single Z-9 could carry around 7.6-9.5 tons daily and 40-50 troops to Taiwan considering the distance of 130 km. If we consider the distance of 220 km, it could transport 3.8-5.7 tons and 20-30 soldiers to Taiwan daily.
A single Z-8 could carry around 12-15 tons daily and 108-135 troops to Taiwan considering a distance of 130 km. If we consider the distance of 220 km, it could transport 6-9 tons and 54-81 soldiers to Taiwan daily.
A single Z-18 could carry around 16-20 tons daily and 108-135 troops to Taiwan considering a distance of 130 km. If we consider the distance of 220 km, it could transport 8-12 tons and 54-81 soldiers to Taiwan daily.
Just a single Z-8, Z-9 and Z-18 could carry 35.6-44.5 tons and 256-320 soldiers daily considering a distance of 130 km. Considering the far side of the strait, a single Z-8, Z-9 and Z-18 could carry 17.8-26.7 tons and 128-192 soldiers daily.
Now do the math. Let's say a rotational force composed by 10 helicopters Z-8, Z-9 and Z-18, it would be enough to multiply by 10. Now, a force composed by 100 units of each helicopter, which is a reasonably small number compared to the capacity of the PLAN and the Chinese aeronautical industry.
10 Z-8, Z-9 and Z-18: 30
130 km: 356-445 tons and 2560-3200 soldiers.
220 km: 178-267 tons and 1280-1290 soldiers.
50 Z-8, Z-9 and Z-18: 150
130 km: 1780-2225 tons and 12800-16000 soldiers.
220 km: 890-1335 tons and 6400-9600 soldiers.
100 Z-8, Z-9 and Z-18: 300
130 km: 3560-4450 tons and 25600-32000 soldiers.
220 km: 1780-2670 tons and 12800-19200 soldiers.
Simply, the small distance makes things much easier for the PLA for an airborne operation, the above analysis is just a brief mention that rotational capacity in a future contingency in Taiwan cannot be overlooked, it will become a key requirement in addition to of the vessels. Some things in this review may change, for example replacing the Z-8 with the Z-18 will make a carrying capacity even greater, add 10 more Z-18s, 50 Z-18s or 100 Z-18s in place of the Z-8s , those Z-18 carrying all-terrain vehicle (ATV) means 4-5(or 2-3) of these vehicles can be delivered for each Z-18, now put 10 Z-18 carrying ATVs, that means 40- 50(or 20-30) ATVs could be delivered daily, 100 Z-18 transporting ATVs translates to 400-500(or 200-300) delivered daily.
Simply distance makes it possible.
And if I'm not mistaken, of the 6 PLAGF amphibious brigades since the 2017 reform, 4 were transferred to the PLANMC in order to complete the two existing brigades at the time, which increased the size of the PLAMC from around 13,000 to around 13,000. 36,000 people.
Don't despise the airborne capability of an Op Amp against Taiwan.