black exhaust smoke
41Outdoor wood-fired boiler — The outdoor wood boiler is a variant of the classic wood stove adapted for set up outdoors while still transferring the heat to interior buildings. Contents 1 Technology 1.1 Standard Outdoor Wood Boilers 1.2 Catalytic Outdoor Wood Boilers …
42Ammonium perchlorate composite propellant — (APCP) is a modern solid rocket propellant used in both manned and unmanned rocket vehicles. It differs from many traditional solid rocket propellants such as black powder or Zinc Sulfur, not only in chemical composition and overall performance,… …
43Banya (sauna) — Depiction in the mid 1920s of a rural banya by Russian artist Boris Kustodiev: Russian Venus (armed with birch twigs) Banya (Russian: баня [ˈbanjə]) in Russian can refer to any kind of steam bath, but usually to the Russian type of sauna. In… …
44Water injection (engines) — In internal combustion engines, water injection, also known as anti detonant injection, is spraying water into the cylinder or incoming fuel air mixture to cool the combustion chambers of the engine, allowing for greater compression ratios and… …
45Merkava — For the religious/mystical connotations of the word, see Merkabah. Merkava Merkava Mark IV in Yad La Shiryon, Latrun. Type …
46List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …
47Titanium — This article is about the chemical element. For other uses, see Titanium (disambiguation). scandium ← titanium → vanadium …
48OV-10 Bronco — Infobox Aircraft name = OV 10 Bronco type = Light attack and observation aircraft manufacturer = North American Rockwell caption = An OV 10 firing a white phosphorus smoke rocket to mark a ground target designer = first flight = 16 July 1965… …
49LSWR N15 class — Infobox Locomotive powertype=Steam name = LSWR N15 class / SR King Arthur class Swift, pp. 84 ndash;91] caption = Preserved 30777 Sir Lamiel is part of the National Collection, and is currently operating in British Railways Brunswick Green livery …
50literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …
