F-15EX

Military aircraft - Post cold war aircraft, including for example B-2, Gripen, F-18E/F Super Hornet, Rafale, and Typhoon.
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henshao

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Unread post23 Aug 2022, 01:27

As to which would have greater range, I can't say, but bear in mind poor Rodan is carrying 30,000lbs of fuel in that loadout
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madrat

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Unread post23 Aug 2022, 01:40

henshao wrote:
madrat wrote:I don't recall the F-15E being able to use guided weapons off those rear stations. I thought F-15SA were the first.


by "rear stations" I must be misunderstanding you. you mean air to air maybe?

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Sorry, its the two outermost stations were activated for AIM-120, but conceivably could carry other weapons.
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sprstdlyscottsmn

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Unread post23 Aug 2022, 01:59

henshao wrote:As to which would have greater range, I can't say, but bear in mind poor Rodan is carrying 30,000lbs of fuel in that loadout

And guzzling it rapidly.
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Corsair1963

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Unread post23 Aug 2022, 02:36

sprstdlyscottsmn wrote:
henshao wrote:As to which would have greater range, I can't say, but bear in mind poor Rodan is carrying 30,000lbs of fuel in that loadout

And guzzling it rapidly.


Just to overcome the drag of external fuel tank. You need to consume half of the fuel from within it! :shock:
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sprstdlyscottsmn

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Unread post23 Aug 2022, 12:44

Corsair1963 wrote:
sprstdlyscottsmn wrote:
henshao wrote:As to which would have greater range, I can't say, but bear in mind poor Rodan is carrying 30,000lbs of fuel in that loadout

And guzzling it rapidly.


Just to overcome the drag of external fuel tank. You need to consume half of the fuel from within it! :shock:

Recalling another post where I diagram that drag due to lift is a function of span loading squared (assuming G and q are constant), and that max range occurs at altitudes/speeds where Di ~ .4 Dt it's not hard to make a first order argument that when both aircraft are in cruise that fuel flow will be relative to span loading squared. In the case of the Mudhen/EX with 4 big JDAMS the SL^2 values range from 3,300,000 at 90% fuel to 2,400,000 at 50% fuel. The F-35A with the same load is 2,700,000 at 90% fuel to 2,000,000 at 50% fuel.

So the Mudhen averages 21% more drag due to lift. So with having 61% more fuel at 21% ore drag that means 33% more range right? No, because that is only drag due to lift and doesn't count for the fact that the F-15E/X has vastly more form drag under these conditions, possibly twice as much.
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henshao

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Unread post23 Aug 2022, 16:07

Ok maybe I should just directly quote so that my intentions are understood.

Corsair1963 wrote:The Desert Storm Loadout # 1 is a good example on why even with a heavy load the F-35 is still more than competitive!


The F-15E is at gross with 5 GBU-10s, 2 External Tanks, 4 Air to Air Missiles, plus the Target/Nav Pods. Yet, for comparison the F-35A/C could carry 6 GBU-10s and 4 Air to Air Missiles and would still be under gross by a few thousands pounds!

The F-35 would offer far better performance carrying less external stores. Likely, even has better range....

So, what's the reason for the F-15E/EX again???


In your comparison, poor Rodan is carrying 30000lbs of fuel (to 18k)

As far as range, to quote the Oracle from the Matrix, "what's really going to bake your noodle later on" is how these two jets would deliver such ordnance. I like the span loading figures but dare I say the big story is that the F-15E has terrain-following for a reason (it needs it). That is to say fat amy in a more sensible loadout (all internal) can get a lot more from 18k, as it would be allowed to do everything it wants from angels 35. You start strapping bombs to the wings and the conversation becomes very interesting.
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charlielima223

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Unread post23 Sep 2022, 00:55

An interesting wrinkle...

https://breakingdefense.com/2022/09/air ... -15ex-buy/

The F-15EX would be the best way to replace the existing F-15E fleet or upgrade younger F-15Es close to the EX. I think the EX is a good way for the ANAG to compliment/supplement the growing F-35 fleet.
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weasel1962

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Unread post23 Sep 2022, 01:56

Only 13 F-15C & 3 F-15D will remain in inventory by FY23 per budget. The 213 F-15E fleet will reach an average age of 30.5 years this month. The F-15E does have a longer airframe life than the C/Ds so it can shoulder on past the 36 year average airframe life of the C/Ds.

What that means is that the F-15E can in theory wait until NGAD.

213 F-15E +189 F-22s suggest a 400 unit NGAD program very close to the original 414 PCA replacement that CBO was budgeting for from FY 2028 (service entry 2030).
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henshao

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Unread post23 Sep 2022, 03:51

Jumping to harebrained theories over here, but is it possible the F-15EX, though originally slated to replace the F-15c, will instead replace the F-15E, while the F-15E replaces the F-15C?

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daswp

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Unread post23 Sep 2022, 04:09

weasel1962 wrote:Only 13 F-15C & 3 F-15D will remain in inventory by FY23 per budget. The 213 F-15E fleet will reach an average age of 30.5 years this month. The F-15E does have a longer airframe life than the C/Ds so it can shoulder on past the 36 year average airframe life of the C/Ds.

What that means is that the F-15E can in theory wait until NGAD.

213 F-15E +189 F-22s suggest a 400 unit NGAD program very close to the original 414 PCA replacement that CBO was budgeting for from FY 2028 (service entry 2030).

But they want to retire 30 Block 20 aircraft, and some of the remaining 159 would be training aircraft.
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weasel1962

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Unread post23 Sep 2022, 06:30

Realized I missed out the ANG's 5 sqn of C/Ds (100+). Drops in F-15E or F-22 numbers will put more pressure on the NGAD program.

Fewer planes in NGAD, the more expensive NGAD unit cost will be. There is a balance the USAF needs to achieve. Might not have a choice if planes start falling from the sky due to age.
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