The RD-801 as well as the RD-810 are being designed based on the work of the RD-8 vernier and the maintenance and improvement of the RD-120 engines. The RD-801 can be used stand alone on a Mayak or in a cluster.
The designers have proposed three versions of this engine:
RD-801 (version 0) (Russian: РД-801 (версия 0)): This is the basic module with no TVC.
RD-801 (version 01) (Russian: РД-801 (версия 01)): This is a version which includes a TVC by gimbaling of the nozzle in two axis by +/- 6°.
RD-801V (Russian: РД-801В): High altitude of the rocket engine with extended nozzle.
Mayak – Prospective Ukrainian launch vehicle family for which the RD-801 is being developed.
RD-8 – The Zenit second stage vernier engine which was the technological base for the RD-801.
RD-120 – The Zenit second stage main engine which was the technological base for the RD-801
RD-810 – A higher thrust engine of the same family.
^ abcdefDegtyarev, A . V.; Shulga, V . A.; Zhivotov, A . I.; Dibrivny, A . V. (2013). "СОЗДАНИЕ СЕМЕЙСТВА КИСЛОРОДНО-КЕРОСИНОВЫХ ЖИДКОСТНЫХ РАКЕТНЫХ ДВИГАТЕЛЕЙ НА БАЗЕ ОТРАБОТАННЫХ ТЕХНОЛОГИЙ ДЛЯ ПЕРСПЕКТИВНЫХ РАКЕТ-НОСИТЕЛЕЙ ГП "КБ "ЮЖНОЕ"" [THE DEVELOPMENT OF LOX - KEROSENE L IQUID ROCKET ENGINES FAMILY FOR PERSPECTIVE LAUNCH VEHICLES OF YUZHNOYE SDO BASED ON PROVEN TECHNOLOGIES] (PDF). АВИАЦИОННО - КОСМИЧЕСКАЯ ТЕХНИКА И ТЕХНОЛОГИЯ (in Russian). National Aerospace university them. NE Zhukovsky. 2013 nr. 01 (98): 44–50. ISSN 1727-7337. Retrieved 2016-07-11.
^"RD-801". Defense Industry Of Ukraine Products And Services. Retrieved 2016-07-11.