F-35 High Energy Laser

F-35 Armament, fuel tanks, internal and external hardpoints, loadouts, and other stores.
  • Author
  • Message
Offline

glennwhitten

Newbie

Newbie

  • Posts: 14
  • Joined: 12 May 2017, 18:42

Unread post04 Dec 2018, 23:51

spaz wrote: "The biggest obstacle remains the Corona effect. This occurs with power cables charged with extreme voltages at high altitudes. Those conditions mean the air around the cable becomes a conductive plasma, creating the conditions for a dangerous short circuit. Modern aircraft routinely fly at altitudes above 30,000ft where the Corona effect becomes most pronounced. Hybrid electric vehicles will need megawatt powers, meaning they will need to distribute the power from the generator to the motor along cables carrying hundreds of thousands of watts. No solution to the problem yet exists, but lightweight insulation materials may be promising."

Maybe they discovered the needed cable insulation for the Corona Effect at the University of Melbourne, a ceramic based cable insulator that is heat and fire resistant.

Electrical Cable Triggers Lightweight, Fire-Resistant Cladding Discovery
Tue, 11/20/2018 - 10:40am
by University of Melbourne

A University of Melbourne researcher has led the successful development of an organic, non-combustible and lightweight cladding core - a product that was previously thought to be impossible to create.

Typically, lightweight cladding is made from organic, carbon-based, composite materials like plastic, but these materials by their nature are combustible. Non-combustible materials like steel, ceramic tiles or concrete are much heavier and more expensive to produce and install.

University of Melbourne Fire Engineering Group research leader Kate Nguyen has discovered that the plastic insulation around electrical cables uses tiny ceramic particles that activate and chemically interact with each other, forming and spreading a heat resistant network through the material.
Offline

castlebravo

Active Member

Active Member

  • Posts: 229
  • Joined: 08 Feb 2011, 19:10

Unread post05 Dec 2018, 22:01

archeman wrote:
sferrin wrote:
spazsinbad wrote:...The biggest obstacle remains the Corona effect. This occurs with power cables charged with extreme voltages at high altitudes. Those conditions mean the air around the cable becomes a conductive plasma, creating the conditions for a dangerous short circuit. Modern aircraft routinely fly at altitudes above 30,000ft where the Corona effect becomes most pronounced. Hybrid electric vehicles will need megawatt powers, meaning they will need to distribute the power from the generator to the motor along cables carrying hundreds of thousands of watts. No solution to the problem yet exists, but lightweight insulation materials may be promising."


Wouldn't something like a shielded cable work? :?:


This Corona effect has always been an issue for radars. That is why they run in sealed pressure controlled boxes.


I suspect they will do the same with tactical laser weapon pods for fighters. They can have enough batteries/capacitors in the sealed pod to to fire it a few times, and then recharge it over time with lower voltage/power from the aircraft.

The "Killacycle" electric drag racing bike got 500+ HP out of a ~200lb lithium battery pack. 500 HP is ~373kw, so that should be good for a ~150kw laser assuming <50% efficiency, and at 9.7kwh of capacity, it would in theory be able to fire the laser for ~90 seconds. It may even be preferable to avoid the complexity of recharging in flight and just put enough battery in the pod to last an entire sortie.
Offline

knowan

Active Member

Active Member

  • Posts: 218
  • Joined: 24 Jul 2018, 10:39

Unread post10 Dec 2018, 23:59

castlebravo wrote:The "Killacycle" electric drag racing bike got 500+ HP out of a ~200lb lithium battery pack. 500 HP is ~373kw, so that should be good for a ~150kw laser assuming <50% efficiency, and at 9.7kwh of capacity, it would in theory be able to fire the laser for ~90 seconds. It may even be preferable to avoid the complexity of recharging in flight and just put enough battery in the pod to last an entire sortie.


Don't forget cooling; the energy that isn't going into the laser shot is almost entirely waste heat, which has to be dealt with somehow.
That will likely be some sort of active cooling system; if the laser is an isolated pod, that will cut into the power available for the laser.
Offline
User avatar

element1loop

Elite 1K

Elite 1K

  • Posts: 1124
  • Joined: 31 Dec 2015, 05:35
  • Location: Australia

Unread post21 Dec 2018, 05:16

Why DARPA thinks air assets will be the last to get laser weapons

By: Aaron Mehta

Dec 20, 2018

WASHINGTON – It’s been a running joke inside the defense technology community for years: lasers are the weapons of the future ... and always will be. But while experts have long predicted laser systems, also known as directed energy weapons, are juuuust over the horizon, more and more technology experts have said they believe lasers are truly in the realm of the possible in the near-term for the Pentagon. Which raises the question: who gets them first?

Speaking at the Washington Post earlier this month, Steven Walker, director of the Defense Advanced Research Projects Agency, said, if possible, the Air Force would love to get directed energy up and running tomorrow. "I never met a four-star general who didn’t want a laser on his airplane,” Walker said. “It would be really neat. That would be a really neat technology and capability.” But weight remains an issue, Walker warned. Quite simply, the technologies needed to support a laser weapon are heavy. “All this power generation and cooling adds up in terms of weight," he said. As a result, “I think airplanes will probably be the last, sort of, application of it, but I think we’re very close to having a ship-based capability,” he said. “The Navy’s done some demonstrations in that space. I think ground capability, lasers from the ground, from trucks, are being worked pretty heavily. And those will be closer than a laser on the airplane.


https://www.c4isrnet.com/electronic-war ... r-weapons/

--

This does not mean you can't initially put four smaller and lighter lasers on to a flight of four fighters, and have them surround and mutually attack the same target at the same time, coordinated via data-fusion pointing, timing and coop-engagement.
Accel + Alt + VLO + DAS + MDF + Radial Distance = LIFE . . . Always choose Stealth
Offline

squirrelshoes

Enthusiast

Enthusiast

  • Posts: 90
  • Joined: 08 Nov 2016, 23:53

Unread post26 Dec 2018, 02:55

That makes sense.

I think USAF will be the last of the three major branches to have a combat laser deployed, and when they do the first platform won't be on a fighter it'll be an AC-130. Seems they are always fiddling around with the weapon load of AC-130s and JSOC is often a bit quicker to adapt and try new things. AC-130 seems like a natural platform since it can handle the weight, operates at lower altitudes, and is definitely something that could make use of unlimited magazine that comes with DEWs.
Offline
User avatar

element1loop

Elite 1K

Elite 1K

  • Posts: 1124
  • Joined: 31 Dec 2015, 05:35
  • Location: Australia

Unread post26 Dec 2018, 03:58

squirrelshoes wrote:That makes sense.

I think USAF will be the last of the three major branches to have a combat laser deployed, and when they do the first platform won't be on a fighter it'll be an AC-130. Seems they are always fiddling around with the weapon load of AC-130s and JSOC is often a bit quicker to adapt and try new things. AC-130 seems like a natural platform since it can handle the weight, operates at lower altitudes, and is definitely something that could make use of unlimited magazine that comes with DEWs.


A heavy experimental DEW has already been installed and tested in the weapon bay of an Avenger drone. No particular need to get humans that close. In fact you could put a similar system into the bay of an MQ-25 Stingray.
Accel + Alt + VLO + DAS + MDF + Radial Distance = LIFE . . . Always choose Stealth
Previous

Return to F-35 Armament, Stores and Tactics

Who is online

Users browsing this forum: No registered users and 2 guests