Скачать с ютуб Locomotive horn air consumption tests в хорошем качестве

Locomotive horn air consumption tests

A video showing how much air different horns use. Each horn listed below and the time it took for it to burn through 20 gallons of air at 120 PSI, no compressor running. Wabco E2: 30 seconds, sound falls off considerably after 60 PSI Nathan M5: 12 seconds (Holy air hog batman!) Leslie VAR S5T: 25 seconds Nathan K5LA: 16 seconds Nathan P5 (P5A used in video): 25 seconds First off what sort of things affect how much air a horn uses? There are a number of factors, but it all comes down to two basic things, the size of the air inlet and the wear of the diaphragms and nozzles. Now when I say inlet, I’m not talking about the 1/2” threaded port in the base of the manifold. Rather I am talking about the small hole that feds air into the chamber where the diaphragm is housed. The purpose of the inlet is to meter the air flow going into the chamber so that the diaphragm receives a consistent even flow. Now when it comes to the inlet, the bigger the inlet is, the louder the horn will be. But, a bigger inlet also means that the horn uses more air, and is harsher sounding. Some horns, such as Leslie Supertyfons the inlet can vary in size quite a bit without making the horn too harsh sounding. On other horns, especially the K and P series, the inlet is already at its maximum size and drilling it out only makes the horn harsher and less air efficient, without much gain in how loud it is. So don’t drill out your Nathan bells! Nathan P horns can use either a single diaphragm, or two diagrams. A double diaphragm horn has the same effect at drilling out the orifice, it is louder, harsher, and used more air. Old cast horns and new cast horns will use the same amount of air all other factors being equal. Nathan M horns can be either 3/16” or 5/16” inlets. Again, the larger the inlet the more air it uses. Notice that my picture of the Leslie pin there is a #2 on the pin. This is the size of the pin, in this case a #2 is an 1/8”. There sizes are 2 through 5, with 2 being the largest and 5 being the smallest. There is one size bigger than 2, this is the M or #7 pin, which is the same size as the internal diameter of the pin. M pins are typically only used on single chime horns. A horn that has all #2 pins is called full orifice, and has an F on the tag, for example S3LRF means an S3L with one bell reversed that is full orifice. Other Leslie horns are variable orifice, with pins being different sizes. The idea of a variable orifice horns is to balance the sound by making some bells (tones) louder or quieter than others. In the case of air usage, a full orifice horn uses more air than a variable orifice horn.