The RD-253 (Russian: Ракетный Двигатель-253, romanized: Raketnyy Dvigatel-253, lit. 'Rocket Engine 253') and its later variants, the RD-275 and RD-275M, are liquid-propellant rocket engines developed in the Soviet Union by Energomash.

Specific impulse sea level: 285 s. Burn time: 130 s. Height: 2.72 m (8.92 ft). Diameter: 1.50 m (4.90 ft). Engine: 1,280 kg (2,820 lb). Chamber Pressure: 157.00 bar. Area Ratio: 26. Thrust to Weight Ratio: 139.06. Oxidizer to Fuel Ratio: 2.67. Family: Storable liquid. Country: Russia. Propellants: N2O4/UDMH. Agency: Glushko bureau.

From 1987 to 1993, NPO Energomash developed a more powerful version of the engine, designated RD-275, which has been used on the first stage of the Proton rocket until 2007, when the improved RD-276 model was introduced. The engines were mass produced at PPO Motorostroitel (also known as Permskie Motory or PAO Proton-MP) in the city of Perm.

Interstate 275 (I-275) is an auxiliary Interstate Highway in the US state of Michigan that acts as a western bypass of the Detroit metropolitan area. The Michigan Department of Transportation (MDOT) maintains the highway as part of the larger State Trunkline Highway System.

Interstate 275 (I-275) is an 83.71-mile-long (134.72 km) [1] highway in Ohio, Indiana, and Kentucky that forms a complete beltway around the Cincinnati metropolitan area and includes a part in a state (Indiana) not entered by the parent route.

Mar 13, 2025 · The Ohio Department of Transportation has announced that a single-lane closure of I-275 East, between U.5. 52 (Exit 71) and Five Mile Road (Exit 69) in Anderson Township is now in place to allow for an emergency pavement repair.

Nov 17, 2019 · The first-stage engines for “Proton” heavy-class launch vehicles (RD-253, RD-275, RD-276) have been mass-produced at the Perm plant since 1965. The last forced modification – RD-276 – was manufactured in 2005. During this time, “Proton-PM” manufactured more than 90 sets of engines and conducted about 770 fire tests.

Apr 12, 2025 · CINCINNATI (WKRC) - Lanes of Interstate 275 in Hamilton and Clermont counties will be closed for utility work and median cable rail installation. Single-lane closure on I-275 …

Mar 14, 2025 · A single-lane closure on Interstate 275 North in eastern Hamilton County remains in effect following emergency pavement repairs.

11 hours ago · A large fuel spill has caused a partial closure of northbound I-275 at 6 Mile Road, Michigan State Police say.