Slotted Keyless Cam Lock, For Door Thickness (In.) 1/4 with Bright Nickel Finish Keyless Slotted Cam Locks. Use Keyless Slotted Cam Locks for drawers and doors that do not require a key for locking. Sets include 2 double-punched cams for mounting latch flexibility, plus hardware. 180Â° cam rotation.
propulsion. n. 1. the act of propelling or the state of being propelled. 2. a propelling force. [C15: from Latin prÅpellere to propel].
Spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. There are many different methods. Each method has drawbacks and advantages, and spacecraft propulsion is an active area of research. However, most spacecraft today are propelled by forcing a gas from the back/rear of the vehicle at very high speed through a supersonic de Laval nozzle. This sort of engine is called a rocket engine. All current spacecraft use chemical rockets (bipropellant or solid-fuel) for launch, though some (such as the Pegasus rocket and SpaceShipOne) have used air-breathing engines on their first stage.