STS-135: ET-138 Tanking Test reveals SSME Fuel Valve issue
Atlantis’ External Tank (ET-138) was put through a Tanking Test on Wednesday, slightly delayed due to a lightning storm which passed over the the Kennedy Space Center (KSC). The test – which is checking the health of the tank’s LO2 stringers – is showing positive signs, although a Space Shuttle Main Engine (SSME-3) Main Fuel Valve (MFV) leaked during tanking, which will require replacement and launch date assessments.
Preparations in the flow towards the Tanking Test were all on track, ahead of what was set to be a 7am loading , including the final work on a small issues with observed moisture on an orbiter system, requiring the removal and replacement of a Window Cavity Conditioning System (WCCS) dessicant.“The aft closeout and confidence checks for cryo load were successfully completed. Orbiter Crew Hatch gap measurements were completed, GUCP (Ground Umbilical Carrier Plate) QD (Quick Disconnect) leak checks were performed. Results were within spec,” noted the NASA Test Director (NTD) report (L2). “The WCCS carrier panel closeout was completed.”
PRSD (Power Reactant Storage and Distributation) GO2/GH2 Reactant gas load operations were also completed, followed by OMBUU (Orbiter Mid Body Umbilical Unit) demates.
However, operations took a seven hour hit at the T-14 hour point of the schedule towards the Tanking Test, as a lightning storm passed over the pad just a few hours prior to the scheduled retraction of the Rotating Service Structure (RSS).
The events were not as severe as the end of March lightning storm which passed over Endeavour ahead of STS-134′s launch.
As a result, the schedule for the test slipped to the right, with the start of the Tanking Test moving to NET (No Earlier Than) 11am local time – after the RSS was successfully retracted just after midnight.
“S0037 Tanking Test operations continued working a modified timeline driven by significant weather delays; Chief Engineer tagup – 0800. ET Tanking Weather Brief – 1030EDT. Cryo load is now scheduled to begin NET than Wednesday at 1100 EDT and run through early evening,” added the NTD.
“RSS rotation to park was delayed due to the significant weather that came through the area last evening. The Orbiter Weather Protection (OWP) and RSS have been retracted at this point to support tanking.”
However, just an hour prior to the scheduled start time for tanking, managers decided to delay again to 1pm local, before changing the schedule again to a 12:25 start.
Ac Load Tester - News
The system installed for verification testing in Nagasaki is currently being adjusted towards an in-plant electric-load leveling test. Testing will be conducted envisaging such cases as short-cycle conditioning to level fluctuations of electricity
“S0037 Tanking Test operations continued working a modified timeline driven by significant weather delays; Chief Engineer tagup – 0800. ET Tanking Weather Brief – 1030EDT. Cryo load is now scheduled to begin NET than Wednesday at 1100 EDT and run
But if you're going to load up the concourse with retail chains, it's nice when one or two of them are actually useful. The second thing is that Pittsburgh airport is one of the trial spots for so-called CrewPASS. Now under testing at a handful of
The United States Postal Service is testing a mail truck outfitted with AC Propulsion's V2G technology. “We see V2G as fundamental for EVs,” Gage said. “Without V2G, EVs are just a big load on the grid. With V2G, the grid and EVs work together.
Testing can be performed by inductively coupling an AC signal to the probe tip, with coupling enhanced by including a magnetic material in the dielectric probe tip. Using an AC test signal enables testing of ICs without requiring separate power and
Schumacher BT-100 100 amp Battery Load Tester
This device is a c slew load tester.
A c slew load tester works by using a calibrated load to the battery (the load is essentially a large c resistor that heats up when voltage is applied).
To decent try using this method, the battery must exist at least 75% charged. A good battery should exist able to render half its cold cranking amps (CCA) rating for 15 seconds without dropping below 9.5 volts (if you desire to try batteries that are not amply charged you’ll motive to buy an electronic tester which tests by measure the internal resistance of the battery.)
IMPORTANT NOTE: This unit (by design) will have hot and might initially create some smoking if there is any foreign matter on the resistor element.
Ac Load Tester - Bookshelf
Rapid Load Testing on piles
The aim of a load test is to proof that a foundation fulfills the specified ... However, ac- ceptance is low in Europe. The research described in this paper ...The application of stress-wave theory to piles, science, technology and practice : proceedings of the 8th International Conference on the Application of Stress-Wave Theory to Piles : Lisbon, Portugal, 8-10 September 2008
Dynamic load testing offers more elegant and much cheaper solution in Czech ... Static load test for in situ verification of load bearing capacity of piles ...Popular Science
Measuring the battery's AC resistance (impedance), the tester draws less current than a glove compartment's light bulb and eliminates the need for load ...Experimental electrical engineering and manual for electrical testing; for engineers and for students in engineering laboratories
EXPERIMENT 5-G. — Motors and Lamps Connected in Parallel to the Same AC Supply. ... The load in most power plants consists partly of incandescent lamps, ...Use of waste materials in hot-mix asphalt
This helps illustrate the conclusion that asphalt-rubber mixtures will exhibit more Average Stress, kg/sq cm AC-20 -35 -30 -25 -20 -15 -10-5 0 Test ...Day-by-day Guide Directory
Ac Tester-Ac Tester Manufacturers, Suppliers and Exporters on ...
Choose Quality Ac Tester Manufacturers, Suppliers, Exporters at Alibaba.com. ... Related Searches: ac circuit tester, ac dc voltage tester, ac load tester, ac dc tester View all ...
AC load bank|load bankS|Intelligent charge/discharge tester ...
AC load bank|load bankS|Intelligent charge/discharge tester|Intelligent battery discharger
Ac Electric Testers-Ac Electric Testers Manufacturers ...
Choose Quality Ac Electric Testers Manufacturers, Suppliers, Exporters at Alibaba.com. ... Load Banks are devices designed to provide electrical loads for testing power sources ...
Programmable AC Electronic Loads
4600 Series AC Electronic Loads are intended for applications that require the entire range of non-linear loading to thoroughly test AC-output power conversion devices
CT70 - AC Circuit Load Tester
CT70 - AC Circuit Load Tester. AC outlet load handling capabilities plus Outlet Tester functions