That’s a fair assessment as well. That being said, I kind of like my wing on the other hand…….it is part of why I’m a lot more feared at the merge than an A-6 would have been….that and it makes it easy not to hit things on either side of the landing area back at the boat 🙂
Interesting about the A-6 vs F-14 wing, I’d always noticed how similar they looked, but I didn’t know it had been transplanted
I read somewhere lately that the accidents rates for USN is pretty high up until F-18.
I can assure you 90% of that is fbw. IMHO It’s still a POC wing. 🙂
Always? Well, not always.
When the wings are fully retracted the “typical” swing-wing fighter (whatever that his) will (in theory at least) have a very decent drag coefficient by comparison with its “fixed wings” companions. On the other hand the “swing mechanism” used on these aircrafts were fairly complex, heavy and they took space, so (again on theory) you could have a lighter fighter for the same size/thrust if the wings were “fixed”.
Cheers 🙂
very true,
The primary thing they were going after when swing-wing is in vogue is balance the need for low speed, primarily driven by take-off field lengths requirements, vs the need for high speed characteristics, primarily the Vmo and MMo and the level accel numbers.
they paid for that in weight.
not only the weight of the swing mechanism itself, but the fact that now the landing gears can not be mounted directly to load bearing wing structures. which further means a strengthened fuselage, which further means weight.
I would say this holds true for all the swing wing fighter developed in 60-70s. Mig-23/F-111/F-14/Tornado.
You make some valid points. I’d say that the main advantage that the A-6F would have had over the Hornet (aside from just being cool) is fuel, fuel, and more fuel. That and they can carry a whole heck of a lot more ordnance than we can ever hope to. That being said, in this day and age of JWeps and such, the days of going “downtown” and dropping a manly stick of 22×500# GP’s is probably over for good. At least with the current unease of collateral damage. As for survivability amongst threat WEZ’s, that’s probably a discussion better left off the interwebs, but I’d take my Hornet over an Intruder any day of the week. But I would like some more gas…..
You forgot the wing.
It’s the drag that makes the other half of range equation.
A-6 Had a pretty good high subsonic wing designed for efficient cruise. not so for that thin POC that;s on F-18’s wing .
they put the same basic A-6 wing, scaled it, and put on it the pivot. yes, on the F-14….
btw it’s basically the same wing (scaled that Grumman puts on their Gulfstream IIs which was built for range at speed. which the basic ideas gulfstream later shamelessly adapted and streched all the way to their Vs. 🙂
i see, so in the end the JF-17 was third ranking tier in the PAF want list.. or maybe fourth behind F-16
That was when it wasn’t that clear FC-1 would be a successful project.
@TR1 Trident.
look at it this way.
the role Russian Aviation industries is fulfilling for the PLAAF is a somewhat secure alternative source to ensure over-all schedule of their programs. either by technology transfer or direct imports.
It’s the far cry from only couple of years ago where alot of the over-all weapon systems can only be sourced from Russia.
a good example is their large air-lifter program. they have a tight schedule and they have identified the critical item that drives their over-all schedule into service is the engines. so they secured an engine source as D30K brought directly from Russia. after which their Chengdu aero-engines will build D30Ks in house…all to get the developement and intial induction on schedule. all the while they are getting their large high-by-pass turbofan developement in high gear to do an CFM56 class engine based on their WS-10 gas generator (very ironic! ) to power the ultimate version due to be available after couple of years in service.
The same pattern holds for J-11B, J-10A, etc etc.
To say the chinese industries are still lag behind today because they still import from Russia is kinda like seeing the tree but missing the forest.
Do they lag? yes. but obviously they are on a pretty fast clipped trajectory. are they going to have hiccups? of course. would this matter in the overall scheme? barring an ww3 or a total collapse of chinese social-economic system, no. the hiccups would not matter.
in a couple of years would you still be able to identify systems that Russian Aerospace industry is able to provide? sure. but by this trend you will find those items to matter less and less to the over-all program schedule and risks. that’s the important thing imho. whose right and whose wrong? you guys may be right in the transient of time. but its only the transients.
Usually one can only see an inflection point after it has passed.
Hmmm Yes that rumour is already out since two days but – at least at the SDF – the currently accepted opinion is that it was nothing but a rumour, since this photo below reportedly shows this prototype 1034 “after” its crash !
I have to admit that proves or disproves nothing but overall it’s strange.
Deino
Some dude wrote a poem and post it on the web.
SOme one else with a very active imagination take that to mean J-10B 1034 crashed.
The guy who wrote the poem completely debunk the rumour.
much ado about nothing.
Well according to the statements the FN delivered to China has 11,700kg while the regular Al-31F is certainly rated about 12,000 kg. That is my question, was it purposeful retuning to accommodate for the J-10?
well who is to believe? website or the “statement”
where is the statement anyways? :confused:
MMBPP SALUT has this:
Google translate, but you get the point.– Indeed, the AL-31F – motor, high demand currently. And we have confidence that in the medium term, production volume will be reduced.
On the contrary, there is some growth. If you take the statistics and plans for delivery in 2009-2012, the annual increase will be at 15-20% per year. Basically, he will remain at the expense of exports to China upgraded AL-31FN engine for the J-10 fighter. A month ago, Rosoboronexport signed a contract with China for more than 120 engines, the supply of 13 engines in 2011 and the completion of deliveries in 2013. In addition, held in June in Beijing meeting of the intergovernmental commission the Chinese side expressed its interest in the supply of upgraded AL-31FN engines with increased thrust – to 137 engines. So for the period 2014-2015 to the year, based on existing and future orders, which we see can be formed quite tense production program. Of course, if we talk about the period before 2020, the AL-31F will gradually descend from the market, the volumes will be reduced.
130 engines ~ 40 fighters, 2 regiments worth of engines.
that is about 1 year production at current rate of J-10.
also happen to be roughly the initially buy number PaF is looking at for “JF-20”
may be they are looking for an engine that can back fit to older models as a spare replacement that also offers higher thrust. who knows.
may be situation is similar to F-16C/D block *0 vs *2, maintaining two engine sources to put pressure on the either supplier and build redundancy into critical sources
The AL-31FN has a different gearbox on it, it is even position different vs AL-31F/FP etc.
The AL-31FN engine has the lowest BTO rate of all the AL-31F engine series.
So its obvious a cheaper engine to manufactor..On the Thrust part, i wonder if it has a slightly smaller Comp fan diameter.. eighter that or it has a different Hi/low pressure fuel pump installed.
same Inlet diameter and flow rate as AL-31F.
so no.
as for lowest MTBO number can you show some numbers? thanks in advance?
Partly Corrected!:D
Take a look at this:
http://www.salut.ru/ViewTopic.php?Id=664“Thrust growth and jet nozzle with thrust vector control are potential if modernized into the AL-31FN-M1 arrangement.”
Could this be the one last order by China??
There it seems you are right, cause new produced AL-31FN is rated at 12.700kgf..
So yes, PLAAF might have down rated em for longer life..
To my knowledge salut offered to Chengdu, no firm answer yet.
if any customers (PLA, PaF) wants them, I am sure Chengdu would oblige. but I think at the moment they are trying to put together a new proposal based on a much bigger power plant. wether salut is involved or not, don’t know.
As for the “down rate for longer life part”…
on the same page, AL-31F is quoted as rated 200 kgf less than the AL-31FN variant. with flow rate and inlet diameter being the same.
no, not a good evidence to show anything.
in blue we thrust.
Not really new, since we’ve heard about that AL-31FN-order already a few weks (months ?) ago, but new to me is the part regarding the J-11 with the AL-31F:
an AL31F powered J-11/27SK/30MKK etc, can not change its engine to WS-10 in field or at maintaining factories. same with new builds with WS-10 powerplants.
PLAAF/PLAN typically maintain (guess here, don’t ask why and how I got numbers) something close to 1:3 ratio between installed engine and spare engines. roughly on par with USAF.
their two seaters have the highest hours and burns most engines… as all of their conversion-to-3Gen trainings are all done on two seaters UBKs and 10S.
thus the emphasis on getting JL-9 into service quickly.Besides that, what’s wrong at the moment ?? 😮 :confused: … within the last two weeks not a single sensational unveiling ?? :diablo:
Its the national day holiday week.
Plus, I would take a modern MiG-29 over a contemporary J-10 😉
.
interm or radar performance I can’t comment because there are too many variations in paramerters. but in term of airframe-system performance…
I would take J-10A/B over a Modern Mig-29 and here is why:
a Me-109F or a G was deadly in the hands of expertens in BoB. but spitfire would let the pilot know know how close you are to the edge of the envelope but a Me-109 would take a novice straight through it.
the system J-10A had can take the aircraft to the edge interm of angle of attack and energy limits, and stay there, and not worry too much of loosing control. and that’s consistent if you are a novice with 100 hours or a experten with 1000 hours. donno with Mig-29. or at least I haven’t heard.
I heard from Dino that PLAAF wanted the Draken in the 60s or 70s too. good taste
Ironically, the other China got both :diablo:
Yes Draken was briefly looked at.
The Lin Biao-dominated PLAAF was looking for supersonic interceptors that had some rough field STOL capability in event that during conflict with either soviets or americans the airfields were going to go first. J-13 light fighter was also born under that vision.
btw they were briefly looking at harriers too.
As for ironic part.
not really. two different time scale. 80s vs 90s. The versions PLAAF were looking at were much early and they didn’t have the $$$ to buy it anyways (incase of M2K) or politically impossible (surrender all sovereignty essentially) to pull those deal off.
But french made good by providing other stuff to China.
Also, as an addendum:
early 90s Chinese deal with Soviet Union/Russians were intially evolved around Mig-29s, it was almost an accident of history that they were to buy su-27SK.
alot of early su-27SK were pretty primative by today’s standards but still much better overall than whatever chinese had in production and shenyang baulked at buying-producing Su-27s. instead want to push their own design… an evolution of J-8II.
radar wise they (PLAAF) wanted APG-66 to integrate if possible (well-known story of peace pearl etc) but that was really a dual/counter/backup with the domestic JL-10 radar developement. the whole of chinese aerospace industry learned quite a bit from peace pearl on how to integrate avionics and radars, even if the deal didn’t go through.
JL-10 was a really interesting radar…almost all front line fighters in PLAN/PLAAF service had a version of that radar one time or the other.
more on that later.
80s were a interesting and trying time for PLAAF and the whole chinese aerospace industry, alot of new projects were in conception, you are seeing the fruits of them today.
USN: Wanted advanced tomcat variants as NATF alternative, got F-18E
I would say “some people in USN” wanted advanced tomcat variants.