Su-27 Open-Beta chit-chat and first impressions!

[GGTharos]

That's exactly what it is. It is the export version of the 27S.

 

I simply thought SK was indeed the basic 80's variant. As for the 'quality'.

[mvsgas]

What are the main differences between the SK and S? Does the SK change depending on the country that bought them?

 

Is it avionics packages, or engines or many different things depending on the country that buy them, etc.

[Bucic]

That's exactly what it is. It is the export version of the 27S.

Ah, OK. All clear now.

Edited November 15, 2014 by Bucic

[GGTharos]

I can only guess that it relates to the ECCM capability of the radar, and possibly some of the RWR programming.

 

I know that the missiles they list in the manual are the export versions (73E, R1, T1, ER1, ET1) and I'm actually fairly certain that for those, the difference IS in the ECCM circuits.

 

What are the main differences between the SK and S? Does the SK change depending on the country that bought them?

 

Is it avionics packages, or engines or many different things depending on the country that buy them, etc.

[mvsgas]

Thanks

I only ask because for example the F-16 ( which is the only aircraft I has some knowledge on) changes from version to version and from country to country, etc. It can have some minor differences and some major ones. To add to that there is the updates, some countries buy them some don't. Some are completing the updated or changes to the aircraft at different times. So I was not sure if the SU-27 has similar differences. ( structural , weight, performance, etc)

Edited November 15, 2014 by mvsgas

[GGTharos]

You're absolutely right to wonder, my impression is this:

 

You have the S, SM, SK and SMK variants, basiacally (the SM has subvariants 1 and 3, 2 IIRC was not produced). The SM are supposedly S upgrades, with the major changes being in avionics, and IIRC recently re-engined as well ... 2005 or 2008 I think.

 

The actual SK should have the same performance and basic avionics as the S. From there on though, things get F-16ish. Although I don't believe the airframe capability changes much for the SK variants, you start going into more capable variants like the Indian Su-30's, the Chinese Su-27SK/SMK (I think they upgraded them) etc.

[Esac_mirmidon]

The SK version has a strong landing gear wich allows greater take off and landing weight and greater payload. Also it has downgraded ECM and data link equipment and other minor changes in cockpit layout, communications and navigational aids.

[theropod]

i found that old video about su-27 and at 0:10 seconds there starts a short run and takeoff like f-15c does at airshows.

i tried that take off with very low fuel and asc off but su-27 cannot perform this takeoff maneouvre short like this in sim or i cannot handle it.

is there anyone can perform short takeoff like this?

thanks

Edited November 15, 2014 by theropod

[159th_Viper]

i found that old video about su-27 and at 0:10 seconds there starts a short takeoff like f-15c does at airshows.

i tried that take off with very low fuel and asc off but su-27 cannot perform this takeoff maneouvre short like this in sim or i cannot handle it.

is there anyone can perform short takeoff like this?

thanks

 

Here we go:

 

SU-27 Short Take-Off.trk

 

Edit: Vid attached in case of playback issues.

 

gShANW0fRnY

Edited November 15, 2014 by 159th_Viper

[theropod]

Here we go:

 

[ATTACH]107479[/ATTACH]

 

Edit: Vid attached in case of playback issues.

 

gShANW0fRnY

 

thank you for video:)

 

real one's takeoff is shorter than yours but looks nearly same:)

[Ironhand]

Opps. A bit late to the party but anyway: Short TO TRK.

[Nedum]

Here we go:

 

[ATTACH]107479[/ATTACH]

 

Edit: Vid attached in case of playback issues.

 

gShANW0fRnY

 

Thx.

 

With each day I love this "bitch" more and more.

What a beauty, what a fine, nice FM! :thumbup:

[theropod]

Opps. A bit late to the party but anyway: Short TO TRK.

the real su-27 takeoff run is 2.5 seconds shorter than yours but the same vertical climb with yours.

 

thank you

[Ironhand]

the real su-27 takeoff run is 2.5 seconds shorter than yours but the same vertical climb with yours.

 

thank you

:) I get up a bit quicker in this one: Short TO #2.

[theropod]

:) I get up a bit quicker in this one: Short TO #2.

 

congratulations ironhand ,thats it! same now:)

what fuel payload?

only asc off or with trim?

thank you:)

[Ironhand]

congratulations ironhand ,thats it! same now:)

what fuel payload?

only asc off or with trim?

thank you:)

I used 20% fuel for a gross weight of 18027. I think, though, that I could have loaded a bit more (25-30%) and still been OK. I just didn't have time to play around with it to find out what the max weight was. I turned ASC off, flicked myself off the runway and, then, immediately re-engaged it. I had tried one time prior with ASC engaged and it seemed to "mush" off the runway. Having it OFF had the right feel. I didn't do it as cleanly as I would have liked. But it was good enough.

[theropod]

thank you ironhand, i had perform it nearly like yours:)

[dumgrunt]

wow, isnt she a bit of a pig compared to the Eagle? love it.

[Ironhand]

wow, isnt she a bit of a pig compared to the Eagle? love it.

More like an F-14. :)

 

 

thank you ironhand, i had perform it nearly like yours:)

Cool! Feels great, doesn't it?

[rrohde]

Always trim for the airspeed. If it increases, trim. If it decreases, trim.

 

Autopilot is not the A key. Use the correct AP key commands.

 

Funnily enough - I just went through one of the new and updated Su-27 interactive training missions narrated by Wags, and there we have the "A" key featured as the route following autopilot. :)

 

So what is it? Is "A" in our out?

Edited December 10, 2014 by rrohde

[theropod]

Cool! Feels great, doesn't it?

 

great but dangereous sometimes:) little adrenaline boom!

thank you ironhand

[Darkwolf]

Am i the only one that the Su27 wants to kill (and kill, in fact) ?

 

On a regular basis, the plane just decide to dive and put like 32 negative G, while i only touched the stick. That is really annoying since beside the plane go uncontrollable, the side effect are the brain immediately implosing in the helmet, and the beer being splashed everywhere in the cockpit.

[theropod]

Am i the only one that the Su27 wants to kill (and kill, in fact) ?

 

On a regular basis, the plane just decide to dive and put like 32 negative G, while i only touched the stick. That is really annoying since beside the plane go uncontrollable, the side effect are the brain immediately implosing in the helmet, and the beer being splashed everywhere in the cockpit.

 

you are not alone:)

i think su-27 don't like anyone who wants to push her limits on first days:)

[Sceptre]

Am i the only one that the Su27 wants to kill (and kill, in fact) ?

 

On a regular basis, the plane just decide to dive and put like 32 negative G, while i only touched the stick. That is really annoying since beside the plane go uncontrollable, the side effect are the brain immediately implosing in the helmet, and the beer being splashed everywhere in the cockpit.

 

Never press S, ever :D

[Fri13]

What is the fuel consumption rate with a afterburner?

 

I have read that Su-27 could use normally afterburner around 30min (depending of course altitude, weight etc etc) but in emergency cases when fuel needs to be dumped, it takes almost 8 minutes to get all fuel out to 1500kg limit.

 

So shouldn't su-27 have very good fuel efficiency even with afterburner?

 

This page is from AL-31 engine technical description book that is available for some years at airwar.ru.

 

Right before 11.2 begins, it would translate like “Afterburning fuel flow”: through II and III contour < 16,200 Kg/hr, through I and IV contour < 16,200 Kg/hr, through V contour < 3,600 Kg/hr.

 

Those “contours” are separate afterburner fuel lines with sprayers, on this engine there are 5 of them. So through all 5 of them there is possible a maximum fuel flow of 36,000Kg/hr. Taking this number as the fuel dump flow, with both engines afterburner fuel systems dumping the Su-27’s entire 9,400Kg of fuel would be dumped in 7.83 min.

 

For anybody thinking that for this particular engine, emergency fuel dump using afterburner fuel system is just a theory – it is not. It is a fact that can be checked easily in the book I took the page from. It clearly states that FN-31A afterburner pump is used for afterburner operation AND for emergency fuel dump[\quote]

 

https://www.metabunk.org/threads/debunked-military-chemtrails-on-off-su-30-smoke-skywriting.2926/#post-83910