Rainier Aerospace has officially decided to cancel vertical launches for the Rainier Endeavor, which includes sea-launches and mobile-pad launches. This comes after Rainier Aerospace, through simulations, discovered that the Atmos rocket-engine lacks sufficient thrust to properly launch the Endeavor vertically in an efficient manner, and wastes more fuel than a standard runway take-off runway, which the Endeavor rocket-plane was originally designed to launch from said runways. The Atmos engine is also at it's max potential for power and cannot be increased anymore unless a new engine or variant is developed using a different cycle, or more Atmos engines are added to the Endeavor, but the Endeavor was never designed to handle more than 1 Atmos engine, and frankly Rainier Aerospace does not want to pursue a totally new engine or engine variant just for 1 launch method that the launch system isn't dependent on. Rainier Aerospace will continue to pursue runway & 747 air-launches for the Endeavor rocketplane launch system, with the 747 still providing incredible flexibility for potential future customers on launches & launch locations. The Endeavor is also nearing it's first powered launch from a runway, but it's waiting on 1 more engine test for the Atmos rocket engine, which recently received a new gimbal mechanism. The first runway launch will be conducted without the 2nd stage OMV, which it's engine, the Orbitz rocket-engine, is nearing it's first live-fire test run after multiple design troubles & delays. The OMV also suffered it's fair share of design troubles and delays, but is now good to go and is just waiting on the Orbitz engine and a power-less abort parachutes test from a 747 before it will be ready to ride the Endeavor on a launch. Anyways, that's all for now, have a great day!
Make a ramp.