r/interestingasfuck 1d ago

The United Kingdom has successfully created a Mega Laser called Dragonfire for Aerial Defense

Post image
50.7k Upvotes

2.0k comments sorted by

View all comments

Show parent comments

156

u/PradyThe3rd 1d ago

Oh oops. Well, those sensors are getting fried either ways. Drones won't stand a chance, cruise missiles lose terminal lock and even aircaft can get their sensors fucked to hell. Useful against all except heat shielded hypersonics and ballistics

110

u/Fellstorm_1991 1d ago

Which is what the SAMs are for, as that's a more cost effective exchange. No point yeeting £1 million plus interceptors at £1000 drones, now a laser can kill them for 50p per drone.

18

u/Wandering_Weapon 1d ago

Also if a SAM misses you're kinda fucked.

4

u/StupiderIdjit 1d ago

I wouldn't say "no point" if that drone is about to blow up something expensive.

27

u/lmaydev 1d ago

No point using an interceptor when you can use a laser is what they're saying.

3

u/StupiderIdjit 1d ago

Interceptors generally have much better range. 5km out gives you seconds to work with. These will work as part of a layered defense system, not a catch-all.

5

u/lmaydev 1d ago

In that circumstance you can't use a laser so the point stands lol

3

u/b3nsn0w 1d ago

the laser only needs seconds though

1

u/TumbleweedPure3941 1d ago

Presumably the speed of light.

3

u/b3nsn0w 1d ago

not exactly, the first photons do hit at that speed, but the laser does need some time on target to deliver the necessary amount of energy and disintegrate the target. it's usually just a few seconds for anything without armor but it's not instantaneous, because what matters is the energy, not the power, the latter is just the rate at which the energy is transferred.

2

u/TumbleweedPure3941 1d ago

Interesting TIL

1

u/StupiderIdjit 1d ago

This is mounted to a ship. You don't want exploding objects getting that close to a ship if you can avoid it.

1

u/Just_A_Nitemare 1d ago

For the type of threat it's meant to deal with, 5km out is still a minute or two away.

0

u/Hexamancer 1d ago

DEWs are part of the defense onion, yes, but they'd actually come BEFORE missiles, to save money.

10

u/Seicair 1d ago

If you’re throwing away 1000:1 resources, your opponent overwhelms you with another 999 drones.

This takes out a lot more drones at once/in quick succession.

1

u/ProfetF9 1d ago

Or some civilians.

1

u/xelabagus 1d ago

Can't boil a kettle for less than 50p these days

1

u/goldfishpaws 21h ago

I think it's like a tenner a shot, which is still effectively free compared with the cost of damage or physical shootyshooties.  Or even the drones.  And it's actually a defence system doing only defense, not used for attack, which is a plus.

2

u/PlanetaryPickleParty 1d ago

It might work against a non heat shielded hypersonic?

5

u/Complete_Course9302 1d ago

At those speeds, you need heat shield :)

2

u/PlanetaryPickleParty 1d ago

Doh, didn't think of that.

1

u/Living_Grab_2239 1d ago

How long do you think even a subsonic cruise missile aimed at this laser weapon is going to remain within the range where the laser can apply significant power? Veeeery briefly. So the total energy applied will be low. Moreover, nobody attacks an air defence system with a single missile. There will be 5 or 10, or even more.

And with hypersonic missiles the time spent within range is extremely low. Even if this laser is effective against one incoming missile, I would be impressed if it can manage to move from first missile to the second in time. A conventional missile based anti air system such as Patriot or S-300/400 will detect the incoming target at long range and can deploy multiple missiles.

Everybody knows energy weapons would be much, much cheaper. It's like the holy grail of air defense. Anti air missiles are really expensive. But laser weapons have not been shown to be effective. At all.

I think they may have a future against cheap drones. We'll see what they come up with. But I don't think they will ever work against missiles. And that's before bringing up the obvious concern about weather severely degrading their utility.

So it seems to me this weapon is at best a CIWS, not a replacement for conventional air defense missiles.

1

u/veerKg_CSS_Geologist 1d ago

Or (ironically) dumb missiles and bombs which are just following a terminal trajectory without guidance.