Sukhoi Su-27/30/33/35/37 Flanker series & Su-34 Fullback - History, Design, Performance & Dissection

My dude

One website is the official export agency of the Russian government (Mach 1.45 / 1100 kph)

The other is the company that manufactures the aircraft (1500 kph / 1100 kph)

And for the sake of completeness, here’s the FSVTS (Federal Service for Military-Technical Cooperation) listing for Su-32:

https://www.fsvts.gov.ru/catalog/689.en.html (Which lists Mach 1.5 / 1100 kph)

What is your source that Su-34 should be able to go Mach 1.98 at altitude and 1450 kph on the deck?

I’m sorry, but this is a new height of absurdity …

Doesn’t game has multiplier for Vne? 1.05 or around this.

This is not Vne

We are talking about maximum speed (at level flight)

And 1450 kph / 1100 kph = 1.318

That’s quite a chunky multiplier!

I was replying to Su-30SM message.

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Even for Su-30SM, I’m not claiming it’s the Vne (though it very well might be).
I was talking about maximum speed in level flight, but I was checking the speed for that one from statshark, since it’s not on live yet …

Also Su-30SM and Su-30SME are entirely different aircrafts, so sources for SME are not applicable to SM.

They differ in avionics IIRC
The airframe design is similar

The engine thrust curves have to be wildly different to account for such a drastic difference in speed … Possible in this case but I doubt it …

As for Su-34 vs Su-34E
It’s virtually impossible for the former to have a max speed of 1450 on the deck when the export version goes 1100 on the deck …

Su-30SM max speed Mach 2.0

image

You mean IRL (source?) or on dev server?

Either way, 1.75 to 2.0 is not that big of a difference

But in the case of Su-34

1450 vs 1100 on the deck

And Mach 1.98 vs 1.45 at altitude

Is a massive difference … It completely changes the nature of the aircraft …

IRL

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That information is inaccurate and most likely it pulls the speeds from earlier data during development before the aircraft was fully tested and went into serial production.

The speed information matches what is given in the 2005 Rosoboronexport brochure for “Su-32 export aircraft” …

Spoiler

And that’s besides that fact that in the game it goes even faster than these “early” development marketing numbers, which were probably made with the hope of finding export customers to fund the further development of the aircraft.

Either that, or they had to limit it later due to safety issues …

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Brochures are for 12500 thrust. Stand 13500 thrust.

Which aircraft are you talking about?

Su-34. Look at thrust numbers in Su-32 brochure and Su-34 stand

Su-30MK, Su-30SM and Su-30SME are completely different planes. Data for one is not applicabe to other.

1- Change from 125kN to 135kN doesn’t make you go from 1100 kph on the deck to 1450 or 1400 kph.
Again, sorry, but that’s an extremely absurd claim. The math doesn’t remotely math and you don’t even need to know math to figure that out …

2- The 2005 Rosoboronexport brochure lists the same speed figures and seems like the 135kN variants of the engine weren’t even a thing back then:

Spoiler

Stand photo is from 2012.

Yes

But it pulls the speed information from some older inaccurate sources …

The three official websites I showed you are from 2023-2025

Or perhaps the real speed wasn’t declassified in 2012?
That would be an alternative explanation for the 2005 brochure too …

@_Fantom2451