A table/overview for the Su-27 V-speeds

[d0ppler]

Internet/google isn't helping me today. I'm looking for a table with the different speeds, like for example VSO (stall speed landing config), VNE (never exceed), VY (best rate of climb), VX (best angle of climb), VFE (max flap extended), VR (rotation), VLE (max landing gear extended), etc..

Preferably in km/h.

[Pavlin_33]

1 hour ago, d0ppler said:

Internet/google isn't helping me today. I'm looking for a table with the different speeds, like for example VSO (stall speed landing config), VNE (never exceed), VY (best rate of climb), VX (best angle of climb), VFE (max flap extended), VR (rotation), VLE (max landing gear extended), etc..

Preferably in km/h.

One great thing is that you have an angle-of-attack indicator in your cockpit. This will tell you when the plane will stall, for example, so you already can determine the VSO your self.

I believe VY should be 900km/h TAS, but I am not 100% sure. The RL manual has it as the climb speed.

If memory serves me right VNE is M2.5 (cockpit canopy limited) and I can't remember the IAS at the moment.

I can check for the rest if I have time.

[AeriaGloria]

I replied to you on Reddit. 
 

For everyone else here I will quote myself

”That’s because what you need is the flight manual.

Minimum control speed- 200 kmh

VNE- 1400 kmh IAS, Mach 2.35

VY- depends on profile: for MIL climb this is 870-900 kmh TAS. For AB climb this is Mach 0.9. Above 12 km you usually need to climb at Mach 1.65+ or 1250 kmh TAS when going for max cieling or speed

VX- this depends on altitude and climb profile. There is no one VX angle. I often find 10 degrees with MiL power works for me until you get high. You can work it out manually by following the speed recommendations for climb profile

VFE- 600 kmh IAS

VR- maximum ground speed of front wheel, 320 kmh, main wheels is 360 kmh

VLE- 500 kmh

There isn’t much else. Best turning speed is 850-1000 kmh, though most people use 800-900 kmh for lower G and better radius.”

Edited January 7 by AeriaGloria

[AeriaGloria]

13 hours ago, Pavlin_33 said:

One great thing is that you have an angle-of-attack indicator in your cockpit. This will tell you when the plane will stall, for example, so you already can determine the VSO your self.

I believe VY should be 900km/h TAS, but I am not 100% sure. The RL manual has it as the climb speed.

If memory serves me right VNE is M2.5 (cockpit canopy limited) and I can't remember the IAS at the moment.

I can check for the rest if I have time.

One thing though, flow separation (I.e stall) only occurs really at 40-50 degrees AOA, and AOA gauge only goes up to 30, which is still helpful as above 25-30 degree AOA is when you lose almost all lateral and directional control. 
 

For landing, I would consider about 15 degrees my limit, as the tail will not the runway at 16 degrees AOA 

As far as endurance and best range speeds go, for MiG-29 this is 4-7 degrees AOA. I would expect perhaps 2 degrees lower for Su-27 

Edited January 7 by AeriaGloria

[Ironhand]

11 hours ago, AeriaGloria said:

VNE- 1400 kmh IAS, Mach 2.35

Just to specify for OP a bit more. Using 1400 km/hr, you can maintain that speed until the fuel runs out. But using Mach as the reference, you are limited to 5 minutes in the 2.15-2.35 range due to possible degradation of the canopy.

[AeriaGloria]

Yes, forgot to mention 

[Pavlin_33]

14 hours ago, AeriaGloria said:

For landing, I would consider about 15 degrees my limit, as the tail will not the runway at 16 degrees AOA

I was under the impression that 8° AoA is the "on speed" value for the Flanker.

[Pavlin_33]

14 hours ago, AeriaGloria said:

Best turning speed is 850-1000 kmh, though most people use 800-900 kmh for lower G and better radius.”

I'm a little bit nit-pickin' here, but when it comes to turn rate/turn radius, any speed below (or above) max rate in a rate fight will just equal worse performance. When it comes to radius fight, any speed higher than just above stall value will  have the same effect.

Smaller radius in a rate fight and better rate in a radius fight will not help, 'cause of geometry.

[AeriaGloria]

5 hours ago, Pavlin_33 said:

I'm a little bit nit-pickin' here, but when it comes to turn rate/turn radius, any speed below (or above) max rate in a rate fight will just equal worse performance. When it comes to radius fight, any speed higher than just above stall value will  have the same effect.

Smaller radius in a rate fight and better rate in a radius fight will not help, 'cause of geometry.

Well you’re also limited that by while Su-27 hits best sustained rate at 1000 kmh. The Mach 0.85 G limit means you can’t achieve it above around 925-935 kmh TAS. If