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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Aimed trawling for schools near the surface recorded with [a] sonar has also been successful. The best efficiency for such schools was obtained by towing along a [curved] track, so that the trawl passed inside the propeller wake. Nevertheless, occasionally schools avoided the gear. Often these schools seemed to be influenced by the trawl warp and avoided it to pass outside the trawl.  2, record 1, English, - aimed%20trawling

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

For a fishing vessel with a requirement to tow large loads at low speeds and to have a reasonable free-running speed, a controllable pitch propeller would seem the obvious choice. The propeller efficiency can be maintained at a high level in the two major modes of operation[, ] which realizes a considerable saving in fuel over the life of the vessel.  1, record 2, English, - free%2Drunning%20speed

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

Generally, slower propeller rotation speed means better efficiency.  3, record 3, English, - propeller%20speed

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Généralement, plus la vitesse de rotation de l’hélice est faible, meilleur est son rendement.  3, record 3, French, - vitesse%20de%20rotation%20de%20l%27h%C3%A9lice

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A propeller system that allows the pilot to adjust the pitch during flight by means of a hydraulic mechanism.  3, record 4, English, - variable%2Dpitch%20propeller

Record number: 4, Textual support number: 1 CONT

The blades of a variable-pitch propeller are attached to a mechanism in the hub that rotates the entire blade about an axis that runs along the length of the blade … This allows the blade pitch to be varied continuously by the pilot to maintain optimum efficiency at any airspeed.  4, record 4, English, - variable%2Dpitch%20propeller

Record number: 4, Textual support number: 1 OBS

Variable-pitch propellers include propellers whose pitch can be set up automatically and propellers whose pitch can be set up manually (i.e. by pilot’s operation). Although "controllable-pitch propeller" can be a synonym of "variable-pitch propeller," most authors consider that controllable-pitch propellers only include propellers whose pitch can be changed manually.  5, record 4, English, - variable%2Dpitch%20propeller

Record number: 4, Textual support number: 2 OBS

controllable-pitch propeller: term standardized by the British Standards Institution.  6, record 4, English, - variable%2Dpitch%20propeller

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Hélice dont on peut régler le pas de façon à modifier le couple résistant.  3, record 4, French, - h%C3%A9lice%20%C3%A0%20pas%20variable

Record number: 4, Textual support number: 1 CONT

Au début, les hélices étaient à pales fixes, réglées pour la vitesse maximale, et ayant un très mauvais rendement au décollage, où une grande puissance est nécessaire. Aujourd'hui, on n'emploie plus que des hélices à pas variable. Dans ces hélices, les pales peuvent tourner autour de leur axe longitudinal (perpendiculaire à l'arbre moteur) pour prendre une inclinaison variable; elles sont actionnées par un moteur électrique ou un piston hydraulique par l'intermédiaire d'un système de leviers ou d'engrenages et de crémaillères, le tout situé dans le carter de l'hélice. L'inclinaison peut être commandée soit à la main, soit automatiquement en fonction de la vitesse du moteur et de la résistance de l'air sur les pales, de manière que le rendement soit toujours optimal.  4, record 4, French, - h%C3%A9lice%20%C3%A0%20pas%20variable

Record 4,  Textual support,  Spanish

Record number: 4, Textual support number: 1 CONT

Para obtener el mejor rendimiento del motor en condiciones de vuelo muy diferentes (despegue, crucero, vuelo bajo o estratosférico, etc.) se usan hélices de paso variable donde el ángulo de ataque es modificado en el curso del vuelo ya por el piloto, ya por un dispositivo automático.  2, record 4, Spanish, - h%C3%A9lice%20de%20paso%20variable

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A pump with a horizontal cylindrical casing in which operates a runner with radial blades like those of a ship's propeller. The pump has a high efficiency at low heads and high discharges, and is used extensively in drainage work.  3, record 5, English, - horizontal%20screw%20pump

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Pompe avec corps cylindrique horizontal dans lequel fonctionne une roue à pales radiales, semblables à celles d'une hélice de navire.  1, record 5, French, - pompe%20h%C3%A9lice%20axiale%20%C3%A0%20axe%20horizontal

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

Driven by the new Pratt & Whitney PT7A turboprop, [the] new glass fibre Hamilton Standard 14RF propeller will equip the Embraer EMB-120(...). Other manufacturers are also developing propeller-gearbox packs with the aim of improving the efficiency of the new turboprops.  1, record 6, English, - propeller%2Dgearbox%20pack

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

Cette nouvelle hélice Hamilton Standard 14RF à pales en fibres de verre, entraînée par le nouveau propulseur Pratt & Whitney PT7A, équipera l'EmbraerEMB 120 (...). Comme Hamilton Standard, d'autres fabricants lancent le développement d'ensembles hélices - réducteurs dans le but d'améliorer encore le rendement des nouveaux turbopropulseurs.  1, record 6, French, - ensemble%20h%C3%A9lice%2Dr%C3%A9ducteur

Record 6,  Textual support,  Spanish