Passive protection of airfields

Totoro

Major
VIP Professional
Lets say a flanker costs PLAAF $50 million, with extras. Sitting on the tarmac its completely unprotected. Not only is it clearly visibile to the enemy, ready to be struck, but a large bomb falling and detonating 100-200 m away may do enough damage to render it inoperable.

With many planes parked on the tarmac, be half of them just decoys made out of wood, enemy will probably use some sort of cluster munition, wiping out dozens of planes in one attack.

Lets look at taiwan. Even using google earth its clearly visibile they have many hardened shelters for their planes. On the other hand, PLAAF doesn't even employ earth/concrete revetments in great numbers and where they do exist it seems a policy to make em large enough to cram 2-3 fighters in one. That makes a nice fat target for a bomb, which could afford itself a 15 m CEP and still fall inside the revetment. Hardened shelters are almost non existant.

So lets get back to that 50 million flanker. Wouldnt it make sense spending another million to build a bunker to make it safer? For a million, you could build a fortress in china. (less so in, say, US) Definitely stronger than what SDB can penetrate. SDB's force at penetration is some 30 000 Newtons, with 50 kg of explosive.

Not only couldn't the enemy use very efficient cluster munitions but it would force it to get back to heavy hitters, at least 1000 lbs jdams. That effectively means at least four times less targets per aircraft in one sortie and/or shorter range.

Furthermore, and this i see as even more important, you can not hit what you can not see. So, in addition to decoy targets, one could simply create vast covered surfaces under which you would build the hardened shelters. If you have, say, 200 by 200 meter homogenous surface with no way of knowing where exactly underneath it are targets parked - you'd need lots more bombs to systematically cover the whole area. Cheap to do with carpet bombing, yes, but very pricey with precision guided munitions.

Alternatively, one could simply build several dummy shelters for every real hardened one but i believe the first solution is not only cheaper but requires less surface.

Of course protecting planes isnt enough. fuel tanks, fuel lines, ammo depots, etc should all be burried under the ground, not so much to make them hardened /that too, of course) but to hide their exact location from the enemy. Those parts which must be visible should be made in great numbers, made highly redundant. In the end, is one time investment of %100 million extra too much for such a protected airbase? You may think it is, i think it is not. China raised its official budget by 5 billion this year. a third goes to PLAAF. So why not rebuild 5 airbases per year for half a billion, each year? Budget increases would still be great even without that money.
 

Finn McCool

Captain
Registered Member
I was looking at Taiwanese airbases on Google Earth and I found their level of protection to vary. At one I saw 9 of what appeared to be Chung-Kuo Indigenous Fighters (or whatever those are called) simply sitting in a giant concrete parking lot. At Another bases, I couldn't find any planes, Until i looked at a heavily forested hillside and was able to see that the Taiwanese had what appeared to be bunker/caves in the hillside. You can see Google Earth pictures of every ROCAF airbase at TaiwanAirPower.org. It gives you a good idea of the force protection (or lack thereof) that totoro was taking about.

Hardened aircraft shelters and such are excellent to have and majorly improve an Airforce's survivability. However, China would probably be better served to improve its radars and other airdefence capability. China is so large that it could put most of its planes inland, away from a possible strike. In the event of a war, it could have bases that are in striking distance of its enemys, and the PLAAF would only move its valueable aircraft into these bases once hostilities had begun, eliminating the possiblity of a deadly preempitve strike. The Forward bases could be hardned, but this system saves the money that would be used to fortify all the PLAAFs bases.
 

MIGleader

Banned Idiot
Chinese airfeilds are not as vulnerable as they seem. They are covered by radar, and have various SAMs and AAA. The PLA also employs the Bodyguard laser countermeasures system. The system can create a smokscreen around an airfield, as well as use laser beams to create fake targets. This system is effective against laser/tv guided munitions. Bodyguard consists of six parts, and can cover an area up to 16,000 sq meters.
 

coolieno99

Junior Member
A surprise attack like the one on Dec. 7, 1941 Pearl Harbor is extremely difficult to execute nowadays due to military and political reasons. Besides, China can supplement her 100 or so airbases by using sections of her thousands of miles of paved freeways and roads as aircraft runways.
 

Totoro

Major
VIP Professional
I was talking just about the passive protection aspect. Of course one has to have sensor coverage, sams, aaa, etc. That goes without saying. So please let this thread not turn into overall protection of airfields. Lets talk just about most passive measures.

I am just thinking aloud that, on top of the active defense measures, it is wise to hedge your bets and do some fortification of the infrastructure and/or hide as much of it from the enemy as possible. Why? Cause such dirt digging and reinforced concrete wprk is low tech, cheap work compared to radars and sams and so on.

So for 5-10% increase in overall cost you've added another layer of defense for the enemy to plan for. And forcing the enemy to use few times more planes for the same desired effect is quite an achievement.
 

SampanViking

The Capitalist
Staff member
Super Moderator
VIP Professional
Registered Member
China certainly has the money and the ability to build hardened shelters, so if they are reluctant, there is probabaly a good reason.

My best guess is that they are too easily identified as targets and vulnerable to Cruise Missile attacks. Maybe PLAA feels that mobility is a better war time defence.
 

Totoro

Major
VIP Professional
Being mobile and not having a centralized network and/or depending on just a few super protected airfields is always a plus. but to make an air force the plaaf sized force mobile on the ground would take an enormous logistical effort and huge amounts of money.

If you're gonna move the planes around in the woods, make them take off from highways or just some country roads - that means just a couple of planes per that road. And that means hundreds upon hundreds of such units, each of which has to have its ground crew. And you can't just scale it down for a group of 3-4 planes. It'd mean more ground crew people per plane than on an airfield.

So, while it is doable and while it is an overall superior solution really, especially with using numerous decoys, it would require a several fold increase in numbers of support crews. It'd be quite pricey and while i'm sure china can afford to spend an one time huge sum of money to harden its airfields, i don't know if it can afford to continuously sustain such a mobile network of micro mobile airbases. And you can't just do it in a time of war as one'd need constant practice and training to make such a network truly effective.
 

Finn McCool

Captain
Registered Member
The power of passive protection is always underestimated. WWII provides a good example. Time after time, the US Marines would go ashore onto Pacific Islands and take heavy casualties from Japanese fortifications that were supposed to be knocked out by naval bombardment. Again in the Vietnam War relentless US bombardment of targets in North Vietnam and tunnel complexes in the South failed. US bombing of the north did cause the North to suffer, but the damage that the US thought it inflicted was not anything like the actual damage. Combined with active protection, the PLAAF could greatly improve the projected casualty rates it would suffer against the USAF if it had effective passive protection. For casualty rates see the Jian vs. F22 thread/s. Passive protection is a priority for the PLAAF now because it does not have a really large stockplie of non-obsolete aircraft that can hold their own. However, as the PLAAFs stockplie of Sukhois and Jians grows, it can rely on the massiveness of the Chinese landmass to protect it.
 

FreeAsia2000

Junior Member
SampanViking said:
China certainly has the money and the ability to build hardened shelters, so if they are reluctant, there is probabaly a good reason.

My best guess is that they are too easily identified as targets and vulnerable to Cruise Missile attacks. Maybe PLAA feels that mobility is a better war time defence.


Agreed.

It's better to be prepared than spend billions having to upgrade
fixed defences every year which are becoming more and more irrelevant
with global imaging
 

Totoro

Major
VIP Professional
Whole point of fortifications is that they're damn cheap for what they offer. And they're mostly an one time investment with very little money needed for maintenance once they've been constructed.

As for fixed defences, of course one should try to go mobile as much as possible. But there are certain things that you can not make mobile. Landing strips are one, for example. Also, china doesn't seem to have chosen the approach of small highly mobile ground crews to service the planes hiding in the forests, etc. More or less everything is at airbases. So since you already are operating at a fixed location, why not fortify it a little?

US keeps criticising taiwain about relative lack of fortification of its strategic targets. Even though, at absolute level, they're far higher than china has. Sure its always better not to let the enemy hit your bases but if that is unlikely to be avoided, every little bit of protection helps.

As for global imaging - it is not persistant. There are no US satellites at geostationary orbits over US as they'd be far to voulnerable. Monitoring is far from being around the clock, with hourly gaps until another satellite flies over a target. U2s and global hawks are for the likes of iraq and other countries which are unable to deal with them. Without protection such planes would be next to useless if sent over china.

But yeah, it does help a big deal to have satellite surveillance and mapped out targets. Which is why simply putting a cover over targets and/or producing many bogus targets helps. That's all just the last layer of defense, of course. First layers would try not to let enemy attack you in the first place.
 
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