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shingen
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Posted: Mar 31, 2012 - 02:58 AM
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haavarla wrote:
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Because that is what they are designed to do - look good at air shows. They probably do handle better at low speeds than the F-16, and so do many other airplanes - F/A-18 for example. The F-16 is designed to handle better at combat airspeeds, and after 35 years, it remains one of the very best. However, good low speed handling is not the result of superior lift, but of controllability at very high angles of attack, primarily the result of two vertical tails vs. one on the F-16. Those two VT become a hinderance at combat or cruise speeds due to the extra drag. Russian and Western designers know what they are doing, so the airplanes do what they are designed to do.
What thats it? i asked you a stright question and this is what you could come up with? I suppose the next thing coming is none of the Su/Russian fighter design can do anything else sinse they never proved them self in real combat.
I must say, this is low, and i expected more coming from someone claiming your CV.
Oh well, never underestimated nationalist feeling getting in the way of objectivity.
They don't probably do have better low speed handeling. They just do. Sure the ventral fins and twin verticals help in lateral stability, but on the flip side, it did not help the F-14 in Lateral stability.. go figure. The F-16 also have large ventral fins last time i've checked. Doesn't seems to help much.. And the singel vertical on F-16 are quite large for the fighter size too. Which doesn't seems to help much eighter.
There is no way the F-16 can fly as slow as F-18. The F-18 is a Carrier jet, its supposed to have good slow speed handeling due to its wing design, i thought this beeing obvious.
Design as Mig-29/Su-27 are not Carrier operating jets. And furthermore, all the lateral stability in the world does not stop an jet from falling out of the sky. That is where the slow speed handeling merge with high lift. But ofcourse you allready know this, but choose to ingore it..
Why don't you just claim that Sukhoi General designer Mikhail P. Simonov fighter designs was a failure, cause you seems to know better.
How good are the jets in today's environment where it's about sensors, MMI, weapons, and BVR?
That's one of the reasons why the F-15 can still compete with(and with better sensors beat) the Su. It's better at high speed. Low speed high alpha is irrelevant for the way air forces want to fight today. What are the best planes here? Typhoon, F-15, F-16.
Look at the difference between the Typhoon and the Su. The Typhoon was also started after the F-15 and look what they did to make something better in aero performance. They sacrificed low speed handling to get what they wanted to make a plane that could fight with BVR weapons. If they go WVR they use HMS and HOBS.
So, if you don't live on a carrier, what is the use of this low speed stuff? |
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1st503rdsgt
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Posted: Mar 31, 2012 - 03:02 AM
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haavarla wrote:
What thats it? i asked you a stright question and this is what you could come up with? I suppose the next thing coming is none of the SU/Russian fighter design can do anything else sinse they never proved them self in real combat.
I must say, this is low, and i expected more coming from someone claiming your CV.
Oh well, never underestimated nationalist feeling getting in the way of objectivity.
They don't probably do have better low speed handeling. They just do.
Sure the ventral fins and twin verticals help in lateral stability, but on the flip side, it did not help the F-14 in Lateral stability.. go figure. The F-16 also have large ventral fins last time i've checked. Doesn't seems to help much.. And the singel vertical on F-16 are quite large for the fighter size too. Which doesn't seems to help much eighter.
Enough with the lateral stability, the modern FCS(Flight Control Computer) is there to support the pilot in control any fighter jet.
There is no way the F-16 can fly as slow as F-18. The F-18 is a Carrier jet, its supposed to have good slow speed handeling due to its wing design, i thought this beeing obvious.
Design as Mig-29/Su-27 are not Carrier operating jets. And furthermore, all the lateral stability in the world does not stop an jet from falling out of the sky. That is where the slow speed handeling merge with high lift. But ofcourse you allready know this, but choose to ingore it..
Why don't you just claim that Sukhoi General designer Mikhail P. Simonov fighter designs was a failure, cause you seems to know better.
Stop being such a fanboy crybaby. Everyone here listens to johnwill for a reason. So you got burned by an actual fighter-aircraft designer (as once happened me); let it go and move on. |
_________________ The sky is blue because God loves the Infantry.
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shingen
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Posted: Mar 31, 2012 - 03:02 AM
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cola wrote:
haavarla wrote:
Then could you explain to me how the Mig-29 and Su-27 has such exellent slow speed handeling over other design like F-16? Or is this also based on nothing? Like it or not it is based on the total lift performance.
havaarla, Mig29 in particular was designed to operate from rough (grass) runways and had intake covers (while breathing through the LERXs) for that purpose, as well as variable pressure and very spread tires, for good stability while rolling on diverse surfaces.
Su27's derivative, ended up on carrier due the similar philosophy in original design.
However, all those extra lifting areas pile up on drag resultant as the speed increases and this is why there are only a few aircraft superior to F16 in performance, even today.
Obviously, F16 can't land on carrier or on grass runway, but no one asks for that anyway.
haavarla wrote:
Design as Mig-29/Su-27 are not Carrier operating jets.
Yes, they are.
Cola,
Have you ever read any of the stuff about a possible carrier based F-16? It's pretty interesting. It turns out the navy picked the F-18 instead as the F-16 had some issues with approach speed, AoA etc. From what I can tell the F-16 could have been made suitable, maybe not as good as others bu it could have worked. |
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haavarla
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Posted: Mar 31, 2012 - 03:03 AM
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What's the L/D for the F-15 and F-16 vs MiG-29 and Su-27 at transonic and supersonic speeds? You know, where the fighting happens.
I haven't found any good sources for the 29 and 27, nor the 15 and 16 with stores.
Its a reason you havent found it, its classified material.
Unconfirmed material on internet states, the F-15 has under par performance in 0-450Kn, 450-600Kn a little better performance and above 600 its pretty much the same. Ofcourse the Fuel and weapons weight must be equall, which in reality it never are.. |
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shingen
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Posted: Mar 31, 2012 - 03:11 AM
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If it's classified, why can I find 15 and 16 L/D stuff with google?
I would bet there's some good estimates available.
Also, what I've seen is that the higher the speed, the better the F-15 is vs the Su. |
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haavarla
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Posted: Mar 31, 2012 - 03:13 AM
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Cola@
Try not to simplify everything.
Upon the design and Creation of Mig-29/Su-27 they was not design for Carrier operation.
Later on however, they modified the Mig-29M into Mig-29K, with some changes.. you know 10% larger flap surface, The MiG-29K was modified from the Mikoyan MiG-29M for naval operations. The airframe and undercarriage were reinforced to withstand the stress experienced upon landing. you know, all that stuff that a Carrier operating jet need.
Pretty much the same story with Su-27 into Su-27K..
In short no, the Mig-29 and Su-27 are not Carrier jets. |
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haavarla
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Posted: Mar 31, 2012 - 03:20 AM
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If it's classified, why can I find 15 and 16 L/D stuff with google?
I would bet there's some good estimates available.
Also, what I've seen is that the higher the speed, the better the F-15 is vs the Su.
Not what i got. Above 600Kn the curves of both jets are similar, so the F-15 enjoy a small edge in the transonic speed regime.
Edit: Keep in mind that for a fighter to go faster than 600kn with stores on, it has to be at much higher altitude, where the air is considerable thinner.
And it has better top speed regime as well. but that is pretty much on paper figures sinse no fighter goes there, like ever.
I've read several books about F-15 in Desert Strom, with the DT jettison, the F-15C never went above 650kn.. well according to the F-15 USAF pilots anyway.
Read the book 'F-15 Engaged', its all there.
If you got the F-15 and F-16 L/D stuff from google, great, why do you ask for it elsewhere?
Here you can read about an F-15C pilot whom flown Su-27UB and his take on it:
http://www.eaa.org/warbirdsbriefing/art ... lanker.asp
Interesting enough he states the Su-27UB feels very similar to F-15C.. just one minor different he did not point out, those are UB which has lower performance due to beeing a two seater, while the F-15C is a singel seater.. |
Last edited by haavarla on Mar 31, 2012 - 04:07 AM; edited 2 times in total
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johnwill
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Posted: Mar 31, 2012 - 03:30 AM
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haavarla,
My response was as respectful to you, to the Russian airplanes, and the Russian designers as I know how to be. If you don't agree with my comments, fine. I suggested a few posts ago that you lighten up and try to be a little less confrontational in your posts. You ignored my suggestion, so I will no longer respond to your posts, until you cease with the childish rants. You are making a fool of yourself and giving your nice country a bad name. |
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shingen
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Posted: Mar 31, 2012 - 03:32 AM
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haavarla wrote:
Cola@
Try not to simplify everything.
Upon the design and Creation of Mig-29/Su-27 they was not design for Carrier operation.
Later on however, they modified the Mig-29M into Mig-29K, with some changes.. you know 10% larger flap surface, The MiG-29K was modified from the Mikoyan MiG-29M for naval operations. The airframe and undercarriage were reinforced to withstand the stress experienced upon landing. you know, all that stuff that a Carrier operating jet need.
Pretty much the same story with Su-27 into Su-27K..
In short no, the Mig-29 and Su-27 are not Carrier jets.
You're ignoring his bit about the field performance. And also, if they're not carrier jets, why optimize for low speed handling anyway? |
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haavarla
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Posted: Mar 31, 2012 - 03:50 AM
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Easy, the field performance are or were according to SU strategic, tactical and on a larger AF doctrines.
Those was their requirements from the very start.
In NATO standards, its called class B Airbase .
I'm not sure, but todays VVS might have departed from these kind of requirements.
They have about 7 airbases(some have two airbases attached to one airbase designation) for fixed wing left. All those Class B airbases are gone now.. |
Last edited by haavarla on Mar 31, 2012 - 04:08 AM; edited 2 times in total
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haavarla
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Posted: Mar 31, 2012 - 03:54 AM
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Quote:
haavarla,
My response was as respectful to you, to the Russian airplanes, and the Russian designers as I know how to be. If you don't agree with my comments, fine. I suggested a few posts ago that you lighten up and try to be a little less confrontational in your posts. You ignored my suggestion, so I will no longer respond to your posts, until you cease with the childish rants. You are making a fool of yourself and giving your nice country a bad name.
Fine.
And try to act accordingly next time you post. That airshow remark was uncalled for and not very proffesial by any standards..
And lets make it clear, i do not challange your figures on F-16 test flight research. |
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shingen
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Posted: Mar 31, 2012 - 04:12 AM
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| The airshow remark has also been made by at least one test pilot and seems to be borne out by combat records. |
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johnwill
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Posted: Mar 31, 2012 - 04:17 AM
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Quote:
Quote: However, good low speed handling is not the result of superior lift, but of controllability at very high angles of attack, primarily the result of two vertical tails vs. one on the F-16.
o Concerning the F35 versus a Gripen, may I conclude this as well?
Quote: The F-16 is designed to handle better at combat airspeeds
o Although Saab claims the Gripen handles better, in a Dutch report (competition) was mentioned the Gripen was not that that much of an improvement above F16.
Just an opinion here, but I have read the F-35 has excellent high AoA capability, and that would apply with a heavy weapon load as well. I don't know about the Gripen, but it's handling qualities, particularly at high AoA, must be degraded when loaded with heavy weapons. Another factor is asymmetric weapon carriage. The F-35 carries its weapons close to the centerline, while the Gripen carries them farther out on the wing. Drop a bomb on one side only and low speed handling worsens, obviously less on the F-35 than on the Gripen.
Comparing the Gripen with the F-16 is another story. I really don't have any knowledge about that, but there should be some here that do. |
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haavarla
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Posted: Mar 31, 2012 - 05:00 AM
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cola
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Posted: Mar 31, 2012 - 10:48 AM
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@shingen,
didn't know that.
haavarla wrote:
Cola@
Try not to simplify everything.
Upon the design and Creation of Mig-29/Su-27 they was not design for Carrier operation.
Later on however, they modified the Mig-29M into Mig-29K, with some changes.. you know 10% larger flap surface, The MiG-29K was modified from the Mikoyan MiG-29M for naval operations. The airframe and undercarriage were reinforced to withstand the stress experienced upon landing. you know, all that stuff that a Carrier operating jet need.
Pretty much the same story with Su-27 into Su-27K..
In short no, the Mig-29 and Su-27 are not Carrier jets.
Mig29 in fact, fared even better than other naval aircraft, cause it didn't have added weight of navalized fighters, since it wasn't supposed to operate from catapults, in salty environment.
You can put 10% larger flaps on F16 and it still won't be landing on the carrier.
Just check wing configurations of planes in question and you'll see Mig29 is in the Hornet class, rather than F16's.
Yes, Mig29 wasn't envisaged as naval fighter as such (F18 wasn't neither btw), but its design and performance characteristics essentially suggest so.
...and johnwill is right, about low speeds.
Those who fight below their corner speeds, don't fight for long. |
_________________ Cheers, Cola
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