2016年9月1日 · The JEL system’s function is to keep the load level on top of the crawler as it rolls out of the crawlerway and to allow vertical motion to drive under, and pick up, a Launch pad and launch vehicle. Engineers from NASA Ames also assisted in the rollout by installing and recording continuous strain gauge data on eight of the crawler shoes.

- INTRODUCTION There are some unique mechanisms in the hydraulic jacking, equalization, leveling (JEL), and steering systems required by the Crawler to perform its mission.

2018年12月11日 · The JEL system was designed with 16 single-acting hydraulic cylinders, four of them in each corner of the transporter’s undercarriage. With this system, the crawler transporter could lift the completely equipped launch platform from its parking slot in the vehicle assembly building, level it during the transport and for the launch pad ramp ...

April 6, 2005 – A crawler, with new shoes and modifications, moved space shuttle Discovery to Launch Pad 39B for its STS-114 return-to-flight mission. Crawler Transporters 3 NASA Facts The crawler transporter (foreground) sits behind the Vehicle Assembly Building after its …

Crawler Transporter Steering and Jel Systems The transporter weighing 2.8 million kilograms (6.3 million pounds) was used to lift a 5.7-million-kilogram (12.6-million-pound) combination of mobile launcher and space vehicle, transfer this load approximately 5.6 kilometers (3.5 miles) from its point of assembly, negotiate curves of 152-meter (500 ...

The specification for the new JEL- cylinders was worked out by NASA based on the requirements for the new rocket and space ship generation. But also some proposals from Hunger Hydraulik regarding the design concept of the new JEL- cylinders were considered and taken over.

The crawler-transporter, carrying the mobile launcher (ML), is being prepared for a journey Nov. 15, 2011, to Launch Pad 39B at NASA’s Kennedy Space Center in Florida.

NASA is developing an expendable heavy lift launch vehicle capability, the Space Launch System (SLS), to support lunar and deep space exploration. The Artemis I Dynamic Rollout Test (DRT) recorded accelerations on Artemis I, the Mobile Launcher (ML), and Crawler Transporter (CT), during its rollout from the Vehicle Assembly Building (VAB) to ...

2015年3月31日 · New gear assemblies and jacking, equalizing and leveling (JEL) hydraulic cylinders are being installed, and other components have been upgraded to ensure the crawler’s ability to handle the load of NASA’s Space Launch System and Orion spacecraft on the mobile launcher as it travels to the launch pad.

A pair of behemoth machines called crawler-trans-porters have carried the load of taking rockets and spacecraft to the launch pad for more than 50 years at NASA’s Kennedy Space Center in Florida.