LZ-400 Rhino
LZ4 may refer to: Transportation * LZ 4 (Luftschiff Zeppelin 4), a German experimental airship * LZ4, a GM High Value engine * SpaceX Landing Zone 4, located at SLC-4 West, at Vandenberg Air Force Base Space Launch Complex 4 Other uses * LZ4 (compression algorithm), a data compression algorithm * 24944 Harish-Chandra, a main-belt asteroid formerly called 1997 LZ4 * ''Led Zeppelin IV The untitled fourth studio album by the English rock band Led Zeppelin, commonly known as ''Led Zeppelin IV'', was released on 8 November 1971 by Atlantic Records. It was produced by guitarist Jimmy Page and recorded between December 1970 and Fe ...

LZ 4
The Zeppelin ''LZ 4'' was a German experimental airship constructed under the direction of Ferdinand von Zeppelin. First flown on 20 June 1908, it made a series of successful flights including a 12-hour flight over Switzerland. It was destroyed when it caught fire after landing to carry out engine repairs during a projected 24-hour endurance trial. This disaster proved fortunate for Zeppelin: donations by the German public raised 6.5 million marks, so guaranteeing the future of his development of airships. Background The successful flights of '' LZ 3'' in 1906 had produced a change in the official attitude to Count Zeppelin's work, and a grant of 500,000 marks had been voted by the Reichstag. However, a condition of purchase by the government was the completion of a 24-hour trial flight. This was beyond the capabilities of ''LZ 3'', so work was started on a larger airship with greater fuel capacity. Design and development Construction of ''LZ 4'' was started in Nov ...
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GM High Value Engine
The High Value engine family from General Motors is a group of cam-in-block or "overhead valve" V6 engines. They use the same 60° vee bank as the 60° V6 family they are based on, but the new bore required offsetting the bores by away from the engine centerline. These engines (aside from the LX9) are the first cam in block engines to implement variable valve timing, and won the 2006 Breakthrough Award from ''Popular Mechanics'' for this innovation. For the 2007 model year, the 3900 engine features optional displacement on demand or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. It was rumored GM would produce a 3-valve design, but that never came to be. These engines were produced primarily at the GM factory in Tonawanda, New York and at the Ramos Arizpe engine plant in Mexico. The assembly line for this engine was manufactured bHirata Corporationat their powertrain facility in Kumamoto, Japan. As of the 201 ...
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Vandenberg Air Force Base Space Launch Complex 4
Space Launch Complex 4 (SLC-4) is a launch and landing site at Vandenberg Space Force Base, California, U.S. It has two pads, both of which are used by SpaceX for Falcon 9, one for launch operations, and other as Landing Zone 4 (LZ-4) for SpaceX landings. The complex was previously used by Atlas and Titan rockets between 1963 and 2005. It consisted of two launch pads, SLC-4W and SLC-4E, which were formerly designated PALC-2-3 and PALC-2-4 respectively. Both pads were built for use by Atlas-Agena rockets, but were later rebuilt to handle Titan rockets. The designation SLC-4 was applied at the time of the conversion to launch Titan launch vehicles. Both pads at Space Launch Complex 4 are currently leased by SpaceX. SLC-4E is leased as a launch site for the Falcon 9 rocket, which first flew from Vandenberg on 29 September 2013, following a 24-month refurbishment program which had started in early 2011. SpaceX began a five-year lease of Launch Complex 4 West in February 2015 in o ...
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LZ4 (compression Algorithm)
LZ4 is a lossless data compression algorithm that is focused on compression and decompression speed. It belongs to the LZ77 family of byte-oriented compression schemes. Features The LZ4 algorithms aims to provide a good trade-off between speed and compression ratio. Typically, it has a smaller (i.e., worse) compression ratio than the similar LZO algorithm, which in turn is worse than algorithms like DEFLATE. However, LZ4 compression speed is similar to LZO and several times faster than DEFLATE, while decompression speed is significantly faster than LZO. Design LZ4 only uses a dictionary-matching stage (LZ77), and unlike other common compression algorithms does not combine it with an entropy coding stage (e.g. Huffman coding in DEFLATE). The LZ4 algorithm represents the data as a series of sequences. Each sequence begins with a one-byte token that is broken into two 4-bit fields. The first field represents the number of literal bytes that are to be copied to the output. Th ...
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