- usually the smallest gear in a gear drive train, although in the case of John Blenkinsop's Salamanca, the pinion was rather large. In many cases, such as remote controlled toys, the pinion is also the drive gear.
- the smaller gear that drives in a 90-degree angle towards a crown gear in a differential drive.
- the small front sprocket on a chain driven motorcycle.
- the round gear that engages and drives a rack in a rack and pinion mechanism and against a rack in a rack railway.
- in the case of radio-controlled cars with an engine (i.e. nitro) this pinion gear can be referred to as a clutch bell when it is paired with a centrifugal clutch.
Monday, December 7, 2015
pinion
A pinion is a round gear used in several applications:
Sunday, December 6, 2015
Saturday, December 5, 2015
Friday, December 4, 2015
Neuroptera
The insect order Neuroptera, or net-winged insects, includes the lacewings, mantidflies, antlions, and their relatives. The order contains some 6,010 species. The group was once known as Planipennia, and at that time also included alderflies, fishflies, dobsonflies and snakeflies, but these are now generally considered to be separate orders (the Megaloptera and Raphidioptera). Sometimes the name Neuropterida is used to refer to these three orders as a group. This is either placed at superorder rank, with the Endopterygota becoming an unranked clade above it, or the Endopterygota are maintained as a superorder, with an unranked Neuropterida being a part of them. Within the endopterygotes, the closest living relatives of the neuropteridan clade are the beetles. The common name lacewings is often used for the most widely known net-winged insects - the green lacewings (Chrysopidae) - but actually most members of the Neuroptera are referred to as some sort of "lacewing".
Thursday, December 3, 2015
Tramontane
Tramontane
is a classical name for a northern wind. The exact form of the name and
precise direction varies from country to country. The word came to
English from Italian tramontana, which developed from Latin trānsmontānus (trāns- + montānus), "beyond the mountains/across the mountains", referring to the Alps in the North of Italy.
The word has other non-wind-related senses: it can refer to anything
that comes from, or anyone who lives on, the other side of mountains, or
even more generally, anything seen as foreign, strange, or even
barbarous.
Wednesday, December 2, 2015
Dowlas
Dowlas is the name given to a plain cloth, similar to sheeting, but usually coarser.
It is made in several qualities, from line warp and weft to two warp and weft, and is used chiefly for aprons, pocketing, soldiers' gaiters, linings and overalls. The finer makes are sometimes made into shirts for workmen, and occasionally used for heavy pillow-cases.
It is made in several qualities, from line warp and weft to two warp and weft, and is used chiefly for aprons, pocketing, soldiers' gaiters, linings and overalls. The finer makes are sometimes made into shirts for workmen, and occasionally used for heavy pillow-cases.
Tuesday, December 1, 2015
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