It will be a Goodrich DB-110 reconnaissance pod.
You learn something new every day, thanks for the info!
I was thinking the same. The load is fairly heavy though, 8x 500lbs LBSs plus the usual.
Anyone happen to know what pod some of the Strike Eagles are carrying on their centerline?
The link posted in #117 contains all the documents…
Not much headroom in the design with 10% better fuel efficiency over the T-38C. That would allow you an F404 that is derated to slide in there, but that’s as long as its not a vis-a-vis comparison. Otherwise you’re limited to all dry thrust around 5,000 lb st in a modern engine with maybe 8,000 lb st in wet thrust. Not many engines fit that interpretation. I think the competitors will all measure T-38C’s wet thrust against their dry thrust, and depending on the design will leave room to incorporate wet thrust or sell it as an upgrade.
Is there a modern engine that doesn’t have 10% better fuel economy? Probably not. The (non-derated) F404 certainly fits the bill even though it’s a low bypass design.
Does anyone have any details on whether any of the ‘clean sheet’ designs from NG, Boeing and the back-up from LM, are supersonic, and to what extent ?
Could an MB346 achieve supersonic ( M1.2 to M1.4 ) with variable shock intakes, variable area exhaust, and possibly afterburner ?
Haven’t gone through the requirements yet, is supersonic ability even in there ?
With afterburners certainly, doesn’t require variable intakes. Has already been done, see here: http://en.wikipedia.org/wiki/Hongdu_L-15
Supersonic speeds are not mentioned however if USAF really wants this jet to be an aggressor, supersonic capability ala F-5 is probably wanted.
They weren’t used because without the new flight control system using them made the aircraft unstable in flight. They were unusable…
True, but the point is stations 1/9 are not part of any upgrade. The flight control system certainly is.
The point remains that in terms of overall complexity each of the examples I have listed is on par with the Gripen NG. They didn’t do the exact same thing but the end result was the same. New avionics, new/uprated engines, a lot of additional capability but technologically conservative and relatively inexpensive compared to a clean slate design.
Maybe on par, maybe not. I don’t think it’s really that important, they’re all pretty complex upgrades.
The closest example might be Gripens spiritual predecessor, the F-20 – new engine, new avionics and some structural mods, but generally the same layout.
Neither did the original F-15E include new engines, the -229 was introduced only after ~132 examples were built, nor does the F-15SA add two additional weapon stations. Stations 1 and 9 have always been there, just not used.
As for the engines, the F-15 didn’t require any major structural redesign to accept the F100-229 or the F110, like f.e. larger intakes. Whether changes from F404 to F414 are more extensive than from F100-220 to -229, I’m not sure.
Turkey to decommission RF-4E fighter jets after crashes
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The Rafale’s conformals are exactly as far along as those on the Eurofighter and Super Hornet… that is to say they could be fully developed and ordered but nobody has yet.
Even if they were ordered conformal tanks wouldn’t boost the Rafale’s range to equal that of the F-35, the Rafale would still need external tanks.
Maybe not. The F-35 burns a lot of fuel hence the relatively poor combat radius of 600nm with internal weapons. I.e. about the same as an F-16 with 2 bags and 2 2000lbs stores – the F-35 burns ~88% more fuel.
What’s the combat radius of a similarly loaded Rafale? More than 600nm I guess. 1150l CFTs probably won’t give the same extra range as 2000l tanks though… but the F-35 looses range too when carrying external stores.
Surely a company like Boeing can figure out such trivialities such as too little vertical stab…
Sure they can figure it out… are you going to pay the bill?
Or in other words: why go for simple and inexpensive when you can have complex and expensive.
CF6 engines attached to the fuselage with one 404 under each wing the least complicated????
What planet on you on MadRat!
That would involve a huge amount of costly work and significant certification work! How do you propose attaching the large turbofans to the fuselage of what are nearly fiftyfive year old airframes. There would have to be significant structural work and changes to the fuel pipework, it would totally change the aerodynamics! It would be such a massive job that it is almost insane to suggest it!
The (user) name says is all… 😉
The RFI specifies eight engines.
Who would have thought.
I know these types of jets don’t have fuel in the wings for safety, but what about using wingtip tanks? Should be far enough from everything and not pose a fire hazard.
Not quite true for the A-10, it carries fuel in the inner area of the wings, about up to where the landing gear is located.
Agree, not just an exercise in replace x lbs of thrust with a similar amount of thrust. Weight, thrust lines, center of gravity, engine/wing dynamics, torsion/bending, FOD all come into play. Massive twins on the inners, or mixed powerplants are not the solution. 4 (or 8) well known engines, placed in about the same place is the way to go.
8 engines is the only sensible option.
4 bigger engines come with a lot of problems as you mentioned. One engine out is another problem with the B-52’s tiny rudder. To sort out all these issues would require major design work and thus is a no-go imho.
There are several modern engines comparable to the TF33 in thrust and size. Like the RR BR700, the GE CF34 or maybe even the GE F118.
Oh, I see. Pretty certain USN fighters need to be able to miss an arrestor hook and take off again on only one engine, especially considering how far they usually operate from the nearest land bases.
Tried to google but no real info
Wasn’t that one of the problems the Jaguar M encountered? I.e. not enough power for a single engined bolter. So I would assume the French have that requirement.
He did said F-16 accelerates best (compared to MiG-29 or F-15), which is wrong for the most part of the flight envelope. He is also wrong about F-15’s M2.5 is limited to 50000 feet, flight manual says its limited to 45000 feet. He could not have operated F-15A to M2.35, as its top speed without Vmax is M2.25 when completely clean, and M2.07 with empty pylons says flight manual. He is also wrong about M2.35 is not operational limit, its M2.3, above that is transient. He is also wrong on that F-16 is more maneuverable than MiG-29, numerically speaking MiG-29’s maneuverability is superior in any criteria in most of the envelope when compared to GE Powered Block 50 F-16’s, says luftwaffe’s MiG-29G manual and blk50 manual.
Top speed depends very much on temperature though. On a cold day and with new engines, the F-15A hits the M 2.5 limit as you probably can read in the manual for yourself 😉
I’m surprised about his comments on the -220 engine. While static thrust is less and the C model is heavier, overall performance is much better.
Standard aircraft characteristics says 1571nm ferry range for the F-106 with tanks, 1140nm clean.
How would the Buccaneer have worked in the nuclear strike role? British nukes? Somehow I can’t imagine that. Integrating American bombs? Surely they would have found a way to persuade the Germans to buy something American instead. Really, an American jet was the only politically feasible option.
They needed a hunchback upgrade with staggered seats like in a Flanker two-seater.
No. The Su-27UB staggered seat layout adds a considerable amount of drag. Absolutely no need to trade better forward visibility for the radar intercept officer for reduced performance.
Give it a higher fuel fraction to avoid the smallish under-intake mounted fixed tanks. Wouldn’t one big drop tank centerline had made more sense for non-Pheonix load outs? That, or F-15 derived Fast Pack compatibility.
The tanks on the other hand didn’t hurt the performance all that much iirc. If they wanted a higher fuel fraction, they could have had the F-111B.
A centerline fuel tank would block all the stations there, so not an option. There’s no place for F-15 style CFTs, but the proposed USAF interceptor version had this ugly installation: http://commons.wikimedia.org/wiki/File:USAF_ADCOM_Grumman_F-14_Tomcat_proposed_interceptor_-_1972.jpg
I don’t consider a pair of 30mm DEFA superior to quad 20mm colts. The French operated F-8’s carrying R.530’s and Magic II’s. They also carried RWR’s. The F-8 Y-racks on the chins could carry AAM’s, a single R.530, or LAU-10 Zuni 4-packs of 5-inch rockets. Crusader II’s (F-8C and newer) eventually gained IRST and others incorporated Bullpups. There was a wide variety of free fall bombs cleared, from 250-pounders to 2K-pounders. And they offered Spey-powered versions to sucker in customers. F-8 was better than Mirage III where it counted.
Not only were the 20mm Colt guns unreliable, 4 of them are also less powerful than 2 DEFAs.
wiki says:
In service, the Mk 12 proved less than satisfactory. Although its muzzle velocity and rate of fire were acceptable, it was inaccurate and frequently unreliable. Pilots of the F-8 Crusader over North Vietnam, in particular, appreciated the presence of the cannon, but jams and stoppages were common, especially following hard dogfighting maneuvers.
About gun effectiveness: http://www.quarryhs.co.uk/modern_fighter_gun_effectiveness.htm