Hopefully this will help put that "supersonic transport" nonsense to bed. Cargo always goes subsonic-period.
http://russia-insider.com/en/science-tech/revival-russias-aviation-industry-new-russian-transport-aircraft/ri13262
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“Project Yermak”
Alongside the undoubted plan to bring the IL106 to production, there has also been a huge amount of internet chatter about a Russian plan for a supersonic aircraft supposedly capable of carrying up to 200,000 kg (200 tonnes) of cargo over a range of 7,000 km.
Allegedly the Russian military is demanding as many as 80 of these aircraft.
A technical manager of Russia’s Volga-Dnepr Group has produced concept drawings of what this supposed aircraft might look like, and there is a widely circulated film based on those drawings which has attracted a huge amount of attention, and which can be easily found on YouTube.
These pictures show a futuristic looking aircraft that would not look out of place in a science fiction film.
They have attracted much ridicule from critics who seem unaware that they are the product of a single individual’s imagination rather than pictures of a genuine state spoaircraft concept.
Is there any truth to these stories?
The source who supposedly leaked the information about this programme claims to have been “shocked by the demands of the military”, which strongly suggests someone out to make mischief. That is a good reason for doubting the stories are true, especially as they have received no corroboration from any other official Russian source.
Though the ability to carry a 200,000 kg (200 tonne) payload over 7,000 km would indeed add a formidable capability, the tactical advantage to be gained from supersonic flight - which could only save some hours in what would already be a very rapid aerial deployment even if made using conventional subsonic aircraft - is not at all obvious.
On the face of it a supersonic capability would add little of value, whilst adding astronomically to the cost and complexity of the project, making it practically inconceivable that the Russians are considering it.
What is far more likely is that the Russians are planning a heavy lift transport aircraft in the class of the AN124 - for which they have a real need. It is a virtual certainty however that it does not have a supersonic capability.
If the source who leaked the story about the supersonic transport has pro-Ukrainian sympathies - and there are known to be such people on the liberal side of the Russian elite - then that might explain it.
He might have been deliberately spreading disinformation about an AN124 replacement project, hoping to stir up an outcry during a time of budget cuts against supposed reckless over-spending by the military in order to stop development of what would be a formidable competitor to the Ukrainian AN124.....................