The RD-107 (Russian: Ракетный Двигатель-107, romanized: Raketnyy Dvigatel-107, lit. 'Rocket Engine 107') and its sibling, the RD-108, are a type of rocket engine used on the R-7 rocket family. RD-107 engines are used in each booster and the RD-108 is used in the central core.

Form RD-107 is a tax return used by a food establishment to file and pay the convention and tourism tax of 2% on the gross receipts derived from the retail sales of prepared food items (including alcoholic beverages).

Nov 24, 2021 · The developed RD-107 engine (for Stage 1) and its twin sibling the RD-108 (for Stage 2) are still in use today! These engines first flew on May 15, 1957, on the first R-7 rocket, which featured four strap-on boosters (Stage 1) that surrounded a single core (Stage 2).

The R-7 rocket had an RD-107 on the first stage strap-ons and an RD-108 on the second stage core. After 120 seconds the strap-on rockets fell off into the desert and 2.5 minutes later the second stage separated. The RD-108 had one turbo-pump but 4 combustion chambers.

While the RD-107 has undergone a number of minor modifications over the years, it is largely the same engine today as it was in the late 1950s, making it the longest-lived rocket engine still in production.

The RD-107 consisted of four combined main rocket engines and two smaller control engines and was used in the R-7 launch vehicle of the type that launched the Sputnik 1 satellite in 1957.

RD-107 液体火箭发动机是前苏联R-7火箭家族的助推发动机，前苏联发动机代号为ΡД-107。 由前苏联气体动力实验室一设计局（现动力机械科研生产联合体）于 1954年～1957年研制。 推进剂为液氧和煤油。 采用蒸气燃气发生器循环，泵压式供应系统。 RD-107火箭发动机的主要特点是：共有4台并联固定式主推力室和2台游动推力室，全都由1台涡轮泵组供应推进剂。 每台游动推力室可作±45°的单向摇摆。

RD-107/108 engines Liquid propellant rocket engines for first and second stages of "Soyuz» LV family

Glushko LOx/Kerosene rocket engine. Soyuz 11A511-0, Soyuz 11A511U-0. Design 2000. Diameter is per chamber. First flight 1965. AKA: 11D511. Status: Design 2000. Number: 3008 . Thrust: 992.00 kN (223,010 lbf). Unfuelled mass: 1,200 kg (2,600 lb). Specific impulse: 314 s. Specific impulse sea level: 257 s. Burn time: 118 s. Height: 2.86 m (9.38 ft).

Modifications of the RD-107 and RD-108 engines for the Soyuz launch vehicle family The development of engines for the first intercontinental ballistic missile R-7 and family of the space launch-vehicles Vostok, Voskhod, Molniya and Soyuz was began in 1954.