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VHF Data Link. The VHF Data Link or VHF Digital Link ( VDL) is a means of sending information between aircraft and ground stations (and in the case of VDL Mode 4, other aircraft). Aeronautical VHF data links use the band 117.975–137 MHz assigned by the International Telecommunication Union to Aeronautical mobile (R) service.
The USRA Light Mikado was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard light freight locomotive of the USRA types, and was of 2-8-2 wheel arrangement in the Whyte notation, or 1 ...
It (and VGN Nos. 901–904) became Norfolk and Western Y3 class locomotives Nos. 2000–2004. The USRA 2-8-8-2 was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. These locomotives were of 2-8-8-2 wheel ...
The Erie Matt H. Shay 2-8-8-8-2. The only 2-8-8-8-4 triplex locomotive ever built. A triplex locomotive was a steam locomotive that divided the driving force on its wheels by using three pairs of cylinders to drive three sets of driving wheels. Any such locomotive will inevitably be articulated. All triplex locomotives built were of the Mallet ...
The 2-8-2 wheel arrangement was rarely, but successfully, used on British rails. Nigel Gresley of the London & North Eastern Railway (LNER) designed two Mikado types of note: The Class P1 was a freight derivative of his famed Class A1 4-6-2, inspired by the Pennsylvania Railroad's twin K4s 4-6-2 and L1s 2-8-2 locomotives. Two were built, but ...
The 2-8-8-2 was a design largely limited to American locomotive builders. The last 2-8-8-2 was retired in 1962 from the N&W's roster, two years past the ending of steam though steam was still used on steel mill lines and other railroads until 1983. A similar wheel arrangemement exists for Garratt locomotives, but is referred to as 2-8-0+0-8-2 ...
Infobox references. 3,9-Divinyl-2,4,8,10-tetraoxaspiro [5.5]undecane ( DVTOSU) is a bicyclic organic molecule having a central quaternary carbon atom (a spiro atom) with which two alicyclic rings are linked, each comprising five atoms. DVTOSU is a diallyl acetal and the precursor for the isomeric ketene acetal monomer 3,9-diethylidene-2,4,8,10 ...
2-8-8-8-4. Under the Whyte notation for the classification of steam locomotives, a 2-8-8-8-4 has two leading wheels, three sets of eight driving wheels, and four trailing wheels . The equivalent UIC classification is to be refined to (1'D)D (D2') for these engines. Only one 2-8-8-8-4 was ever built, a Mallet -type for the Virginian Railway in ...