F-35 Multirole Joint Strike Fighter

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ADMk2

Just a bloke
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Verified Defense Pro
I thought the weight reduction managment program was much earlier in the design and development phase, and one might believe that right now the F-35 design was somewhat finelized, bar some minor issues(tail hook etc) lately?

If they will have to enlargen both the tail hook, wheel brakes and the verticals stabz this late in the program, it does not sound like an weight reduction are in work, rather otherway around..
Anyway, lets wait and see how it looks like when it goes IOC.
SWAT did bappen back in 2004 or so, but they are still on the lookout for potential weight savings. If necessary a fuel tank could be removed from the aircraft as was done with F-22A (though it wasn't necessarily done to save weight) which would affect range somewhat, but it may be a viable tradeoff, if they can save several hundred kilos of weight from the design in doing so.

Time will tell as you say.
 

colay

New Member
One cannot assume that the fixes will automatically result in a weight penalty.


Inside Defense.com - Exclusive national security news from inside the Pentagon

The fixes made to the Marine Corps' short-takeoff, vertical-landing variant of the F-35 Joint Strike Fighter actually improved the weight margin on the aircraft by 270 pounds, despite concerns by the Pentagon's acquisition chief last year that it would add to the aircraft's weight, a Lockheed Martin official told reporters Jan. 20.
 
One cannot assume that the fixes will automatically result in a weight penalty.
That is quite true and as ADMk2 reminded us they have been aware of weight concerns since 04.. With this public awareness, there seems to be a new haste to get our little bird right, every problem resolved means we're one step closer full scale production. It seems like finally some of these folks are getting their heads together, the more they fly and get this thing back in the wind, tunnel the more hope I have that we all might be pleasantly suprised at what I nice airplane we have.
 
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RobWilliams

Super Moderator
Staff member
Apart from the Norwegian NSM are there any other anti-ship missiles that can fit the F-35?

All i know of is the NSM but there must be more i'd have thought, after all an F-35B/C (C more so) armed with anti-ship weapons would be more of a threat than a ship armed with Harpoon missiles due to the increased strike range and its LO characteristics.

Using Wiki figures which i don't like doing, NSM has an 'operational range' of185km+ compared to the Harpoons 124km but i wouldn't bet anything valuable on those being correct however.
 
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rip

New Member
Apart from the Norwegian NSM are there any other anti-ship missiles that can fit the F-35?

All i know of is the NSM but there must be more i'd have thought, after all an F-35B/C (C more so) armed with anti-ship weapons would be more of a threat than a ship armed with Harpoon missiles due to the increased strike range and its LO characteristics.

Using Wiki figures which i don't like doing, NSM has an 'operational range' of185km+ compared to the Harpoons 124km but i wouldn't bet anything valuable on those being correct however.
Don’t get carried away way with comparing the rang of anti-ship missiles. The limiting factor when used in real world engagements is in almost all cases, to correctly identify the right target and then making sure that after the weapon is fired that it hits the intended target and not something else. Up in the far artic where few people live and it is very cold, it might not be a big problem because there is so few unaccounted for ships at sea in those waters at one time. But in allots of places in the world where things are more likely to happen, the problem is not getting a solid radar contacts or getting a firing solution but telling friend from foe or from a neutral or a clueless fisherman. They all make great radar contacts.
 

RobWilliams

Super Moderator
Staff member
Don’t get carried away way with comparing the rang of anti-ship missiles. The limiting factor when used in real world engagements is in almost all cases, to correctly identify the right target and then making sure that after the weapon is fired that it hits the intended target and not something else. Up in the far artic where few people live and it is very cold, it might not be a big problem because there is so few unaccounted for ships at sea in those waters at one time. But in allots of places in the world where things are more likely to happen, the problem is not getting a solid radar contacts or getting a firing solution but telling friend from foe or from a neutral or a clueless fisherman. They all make great radar contacts.
Yeah, i understand there's more aspects to it than just range but I was thinking in times of a conventional war, when the contact is known and it's a reasonably capable enemy it'd be pretty high importance to be able to hit them before they get in range to hit you so comparisons of range should be taken into account. That and i know very little about the technical gizzards inside missile systems so have to make these rudementary judgements :)
 
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RobWilliams

Super Moderator
Staff member
The JSOW family of bomb/missiles can fit internally and the Turkish are working on one also.
Ah right, thanks. I tried searching things like "F-35 anti-ship capability" and all i could find was numerous links on the NSM.

JSOW is the 'glide bomb' right? I'd assume because its unpowered its relatively cheap compared to other options. My specific interest is what munition would the RAF/RN use if any? The RAF website says the only 'anti shipping' munition they use is the Stingray torpedo which AFAIK is an ASW weapon.
 

SpudmanWP

The Bunker Group
The JSOW-ER provides enough thrust to maintain straight and level flight with enough control authority to do endgame maneuvers..
 

Abraham Gubler

Defense Professional
Verified Defense Pro
The JSOW-ER provides enough thrust to maintain straight and level flight with enough control authority to do endgame maneuvers..
Sure but to achieve the range quote it flys the same profile as a glide bomb. Flying the same profile as a NSM or Harpoon its range would be tiny.
 

Abraham Gubler

Defense Professional
Verified Defense Pro
It is said that it can fly 200 miles at wavetop heights.
Fair enough. I knew it had a glide flight path and just assumed range at low alt would be much smaller. I do have a full technical report somewhere which I should dig up and have a look at.
 

Todjaeger

Potstirrer
Apart from the Norwegian NSM are there any other anti-ship missiles that can fit the F-35?

All i know of is the NSM but there must be more i'd have thought, after all an F-35B/C (C more so) armed with anti-ship weapons would be more of a threat than a ship armed with Harpoon missiles due to the increased strike range and its LO characteristics.

Using Wiki figures which i don't like doing, NSM has an 'operational range' of185km+ compared to the Harpoons 124km but i wouldn't bet anything valuable on those being correct however.
While this is not precise information, the SLAM-ER (Land-attack version of the Harpoon) has a number of sensor, guidance and motor/range improvements which gives the SLAM-ER a range of 250+ km... I would imagine at least some of the advancements achieved in the SLAM-ER made their way into the Harpoon Block II. After all, the Harpoon missile programme itself is nearly 35 years old...

-Cheers
 

RobWilliams

Super Moderator
Staff member
Fair enough. I knew it had a glide flight path and just assumed range at low alt would be much smaller. I do have a full technical report somewhere which I should dig up and have a look at.
I'd be pretty interested in that too :)

I can't really find any info on the unit cost of the NSM (one link i found claimed a cost of $1,000,000) but if that is the case and even if the JSOW-ERs cost goes up then it'll still be pretty cheap in comparison.

Here's a pretty interesting link if you want to find out about plenty of missile systems, essentially its a massive directory.

Missile.index Missile Search
 

RobWilliams

Super Moderator
Staff member
While this is not precise information, the SLAM-ER (Land-attack version of the Harpoon) has a number of sensor, guidance and motor/range improvements which gives the SLAM-ER a range of 250+ km... I would imagine at least some of the advancements achieved in the SLAM-ER made their way into the Harpoon Block II. After all, the Harpoon missile programme itself is nearly 35 years old...

-Cheers
This is from Boeing in regards to the improvements made to the Harpoon's Block II

Harpoon Block II provides accurate long-range guidance for land and ship targets by incorporating the low-cost inertial measuring unit from the Boeing Joint Direct Attack Munition (JDAM) program and the software, mission computer, integrated Global Positioning System/Inertial Navigation System, GPS antenna and receiver from the Standoff Land Attack Missile Expanded Response (SLAM ER).
[1]

Also Boeing states the range of the Block II is "in excess of 67nm" which from looking around isn't really an improvement, then looking at that list of upgrades it appears most of the improvements were made to improve operational accuracy rather than its range.

http://www.boeing.com/defense-space/missiles/harpoon/docs/HarpoonBlockIIBackgrounder.pdf
 
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Todjaeger

Potstirrer
Also Boeing states the range of the Block II is "in excess of 67nm" which from looking around isn't really an improvement, then looking at that list of upgrades it appears most of the improvements were made to improve operational accuracy rather than its range.
When I checked the USN's fact file on the Harpoon and Harpoon Block II, the only actual Block II information was the unit cost of US$1.2 mil. all the rest of the information was taken from the Block I.

One interesting thing to note is the very different appearance in the seeker head of the SLAM-ER vs. that of a Harpoon Block II. What that suggests to me is that not all of the guidance work done on the SLAM-ER was applicable for the Harpoon Block II, since that (the Harpoon Block II) is still a AShM, while the SLAM-ER is a LACM.

Also recall reading somewhere that the NSM/JSM and the Harpoon Block II have comparable ranges, the most significant differences between the two being that the Harpoon has a much larger warhead and is overall a larger missile, while the NSM & JSM are small enough to fit within the internal bay of an F-35 yet provide a standoff attack capability.

-Cheers
 
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