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A chimney cowl or wind directional cap is a helmet-shaped chimney cap that rotates to align with the wind and prevent a downdraft of smoke and wind down the chimney. An H-style cap is a chimney top constructed from chimney pipes shaped like the letter H. It is an age-old method of regulating draft in situations where prevailing winds or ...
Regular chimney sweeping removes creosote and prevents fires in the chimney. Steps to prevent this buildup of deposits include only running appliances hot during the initial ignition phase regularly, only building short and hotter fires, regular cleaning of flues using a chimney sweep, and only using internal chimney structures where possible versus a chimney attached to an external wall.
The transmitter must be equipped with a device to monitor the antenna's electrical properties. This is very important, as a charge could remain after a lightning strike, damaging the gap or the insulators. The monitoring device switches off the transmitter when the antenna shows incorrect behavior, e.g. as a result of undesired electrical charge.
Japanese intelligence officers did not even recognise that Yagi was a Japanese name in this context. When questioned, the technician said it was an antenna named after a Japanese professor. [20] [21] [N 1] Close-up of Yagi arrays of the ASV Mark II radar fitted beneath a Bristol Beaufort aircraft for anti-submarine warfare
The main advantage of locating a space power station in geostationary orbit is that the antenna geometry stays constant, and so keeping the antennas lined up is simpler. Another advantage is that nearly continuous power transmission is immediately available as soon as the first space power station is placed in orbit, LEO requires several ...
The PAPI can be seen to the right (non-standard) side of the runway. The aircraft is slightly below the glideslope. A precision approach path indicator (PAPI) is a system of lights on the side of an airport runway threshold that provides visual descent guidance information during final approach.
Antenna is the eleventh studio album by the American rock band ZZ Top, released in 1994. It was the band's first album to be released on the RCA label. The single "Pincushion", reached number 1 on the Mainstream Rock Tracks chart in the US. The second single "Breakaway" featured a non-album B-side: "Mary's".
The song was inspired by one of the drawings of a chimney sweep created by Mary Poppins screenwriter Don DaGradi. When the Sherman Brothers asked about the drawing, DaGradi explained the ancient British folklore attributed to "sweeps" and how shaking hands with one or touching their sleeve could bring a person good luck. [2]