lancelot wrote:So these engines are supposed to have higher thrust-weight? And perhaps the whole rocket is lighter? Only way to increase ascent speed like that.
The diameter is essentially the same as the RS-36 (Vojevoda) but the overall length is greater by a non-trivial amount.
According to Wiki the mass is almost the same. I am not so sure about this given the difference in length. Assuming
that they are the same mass, a faster burn means longer range.
The advertising of the its potential use on trajectories over the south pole tells me that its range is substantially greater
than the RS-36. Going from high latitudes in the northern hemisphere over the south pole to middle latitudes in the northern
hemisphere is well over 20,000 km (*). It is likely that hypersonic glide vehicle range is being included in the total range. But
the ICBM range increase has to be substantial in any case.
(*) Circumnavigation range is about 40,000 km ignoring the oblate spheroid geometry and altitude of flight corrections.