The RD-701 (', Rocket Engine 701') was a liquid-fuel rocket engine proposed by Energomash, Russia (USSR at that time). It was briefly proposed to propel the reusable MAKS space plane, but the project was cancelled shortly before the end of USSR. The RD-701 would have been a tripropellant engine that used a staged combustion cycle with afterburning of oxidizer-rich hot turbine gas. The RD-701 would have had two modes. Mode 1 used three components: LOX as an oxidizer and a fuel mixture of RP-1 / LH2 which is used in the lower atmosphere. Mode 2'' would have also used LOX, with LH2 as fuel in vac
The RD-701 (', Rocket Engine 701') was a liquid-fuel rocket engine proposed by Energomash, Russia (USSR at that time). It was briefly proposed to propel the reusable MAKS space plane, but the project was cancelled shortly before the end of USSR. The RD-701 would have been a tripropellant engine that used a staged combustion cycle with afterburning of oxidizer-rich hot turbine gas. The RD-701 would have had two modes. Mode 1 used three components: LOX as an oxidizer and a fuel mixture of RP-1 / LH2 which is used in the lower atmosphere. Mode 2 would have also used LOX, with LH2 as fuel in vacuum where atmospheric influence is negligible.
The use of less dense fuel components at maximum efficiency conditions allows minimizing the volume of fuel tanks and subsequently their mass down to 30%. The RD-701 proposal was developed into another proposal, the RD-704, which featured a single combustion chamber.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).