摘要:
There is described herein the automation of propeller feather testing functions, whereby the test is automatically performed and a pass/fail signal is issued upon completion.
摘要:
An aircraft (2) is proposed, comprising a fuselage having a tapered rear shape, a landing gear for moving the aircraft (2) on a runway, a wing attached to the fuselage, at least a main engine for providing a main thrust and a rear fan (14), wherein the rear fan (14) is attached to a tail section of the fuselage, wherein the aircraft (2) is designed for conducting a take-off rotation around the landing gear during take-off from the runway, such that the tail section of the fuselage approaches the runway, wherein the rear fan (14) is an open fan having fan blades (36) extending in a radial direction to a longitudinal axis of the fuselage, wherein the fan blades (36) are dimensioned to equal at least a boundary layer thickness of the flow along the fuselage and to be smaller than the gap between the runway and the tail section of the fuselage during the take-off rotation.
摘要:
A pitch control system configured to vary a pitch angle of at least one of a plurality of propeller blades of a propeller system is provided including a switch movable between a neutral position and a plurality of non-neutral positions. Movement of the switch to a first non-neutral position generates a command to move the propeller blades in a first direction. Movement of the switch to a second non-neutral position generates a command to move the propeller blades in a second direction. Movement of the switch to a third non-neutral position generates a command to move the propeller blades to a zero thrust position.
摘要:
La présente invention concerne un dispositif de commande électrique (1) muni d'un moyen de manoeuvre (3). Le dispositif de commande électrique (1) comprend un premier système de mesure (10) et un deuxième système de mesure (20) qui réalisent respectivement une première mesure et une deuxième mesure de la position courante du moyen de manoeuvre (3). Une unité de traitement compare la première mesure et la deuxième mesure pour générer un signal de commande (ORD) en fonction de ladite position courante, ladite unité de traitement (30) considérant que le moyen de manoeuvre (3) est dans une position neutre lorsque la première mesure et la deuxième mesure ne correspondent pas à une même position du moyen de manoeuvre.
摘要:
An aircraft propeller control system for an aircraft propeller (30) with adjustable blade angle has a blade angle feedback ring (104) and a sensor (112), one of which is mounted for rotation with the propeller. The blade angle feedback ring (104) moves longitudinally along with adjustment of the blade angle and has position markers (102) circumferentially spaced apart at distances that vary along a longitudinal axis. The sensor (112) is positioned adjacent the feedback ring (104) for producing signals indicative of passage of the position markers (102). Intervals between signals are indicative of circumferential distances between position markers (102). A controller (115) measures longitudinal position of the feedback ring (104) based on the intervals and is configured to produce a warning signal if the longitudinal position is outside a first threshold range.
摘要:
La présente invention concerne un rotor arrière non caréné (10) comprenant un moyeu (20) et au moins cinq pales (30), lesdites pales (30) s'étendant chacune jusqu'à une extrémité libre (41) décrivant en rotation un cercle (200) présentant un rayon donné dit « rayon maximal (Rmax) ». Le moyeu (20) est rigidement solidarisé à un arbre d'entraînement, ledit moyeu (20) comprenant un corps (21) circulaire creux centré sur un axe de rotation (AX1), ledit corps (21) présentant un rayon dit « rayon interne (Rint) » entre l'axe de rotation (AX1) et une périphérie extérieure (22) dudit corps (21), ledit rayon interne (Rint) étant compris entre 0,2 et 0,4 fois ledit rayon maximal (Rmax), chaque pale (30) présentant un pied (31) prolongé par un élément aérodynamique (40) saillant dudit corps (21) en s'étendant à partir dudit pied (31) vers ladite extrémité libre (41), ledit pied (31) étant articulé en rotation à ladite périphérie extérieure (22) autour d'un axe de pas (AX2).
摘要:
A rotorcraft rotor (710) comprises a blade (600) having a pitch axis, a primary pitch horn (640) for the blade, and a secondary horn (650) opposite the primary pitch horn with respect to the pitch axis
摘要:
An aircraft propeller taper bore insert apparatus (100) includes an outer surface (101), the outer surface (101) dimensioned and configured to fit within an aircraft propeller taper bore or an aircraft propeller balancing tube, and an inner surface (102), the inner surface (102) defining an inner cavity (103) configured to receive a balancing medium (202), the inner surface (102) comprising a plurality of retention formations (104) arranged thereon, and the plurality of retention formations (104) being configured to support the balancing medium (202).