4, the translation means comprises carriage ring 30, a plurality of slide guides 32, a plurality of pneumatic actuators 34, and a plurality of actuator rods 36 attached to carriage ring 30 at one end, and to actuators 34 at the other end. direction until it hits the target-type thrust reverser, whereupon the flow is turned forward in a direction generally parallel to the sloping afterbody sides. Each door 20 is pivotally secured at one end to a translation means. The two pivotal connections between corresponding pairs of bosses 78 and 54 share a common axis and establish what may be referred to as a hinge point on the axis and between the bosses of the same pair. Carriage ring 30 is constructed from member segments with the segments pivotally secured to each other. Found inside – Page 16Summary of Scale - Model Thrust - Reverser Investigation . NACA Rep . 1314 , 1957. ( Supersedes NACA TN 3664. ) 3. Swihart , John M .: Effect of Target - Type Thrust Reverser on Transonic Aerodynamic Characteristics of a Single - Engine ... This nacelle integrates a Target-type thrust reverser and a fixed nozzle, and has been treated acoustically. Another common type of reverse thrust … generation, AIRCRAFT COMBINATION THRUST REVERSER AND SOUND SUPPRESSOR AND A PARTICULAR FULL RANGE BALANCED THRUST REVERSER, UNITARY EJECTOR-THRUST REVERSER ASSEMBLY FOR JET-PROPULSION ENGINES, Means for reversing the thrust of a jet engine, <- Previous Patent (Device for reducing ...). Carriage ring 30 during this movement is guided by the plurality of slide guides 32. Two target-type reversers which appeared to have promise are illustrated in Fig. Description. Thrust reversers are placed in this position in order to reduce the impact of airspeed and wing load, and to maximize the combat efficiency of aircraft. These members are susceptible to binding, bending, and wearing, particularly when the door loads are initially unbalanced-with respect to the center line of symmetry, as is often-the case during landing conditions. The fan cowl - composed of upper and lower clamshell-type doors with an overall length of 103 inches - is produced primarily with composites for lower weight. With the thrust reverser doors arranged in a plurality of tiers, it can be seen that when the doors are in the reverse thrust position, leakage between reverser doors is minimized resulting in maximum thrust reverser effectiveness. 190 Km/h to 130 Km/h and less effective at low IV. Reducing the landing rollout with thrust reversers on Nexcelle's nacelles During its demonstration flight into Gstaad Airport, the Global 7500's flight crew deployed the target-type thrust reversers after touchdown, helping reduce the rollout distance to just under 1,600 ft. on the facility's 4,590-ft.-long runway. This optimization of the sled force transfer system has been made possible by Applicants unique hollowbody construction wherein the sled member and all attach points thereto are confined within the hollow body in close proximity to the longitudinal center line of the support beam. Existing fan air duct reversers are typically high in cost and of relatively low reliability. 6) and an extreme downstream position (shown in FIG. Found inside – Page 536The boundary conditions are formulated , in trolled reversed - flow patterns , all three types of reversers gave general , by means of the so - called transversality condition . The reverse - thrust ratios over 40 % . The ring type with ... Rod linkages are used to interconnect the sled means and the door means and are arranged such that their respective lines of force will always intersect at a poiht within the sled body, thereby minimizing undesirable rotary binding moments on the sled. 17. Generally, the preferred embodiment comprises a plurality of thrust reverser doors 20 arranged circumferentially around the engine turbine case. Computational Fluid Dynamics Investigation of a Core-Mounted Target-Type Thrust Reverser—Part 2: Reverser Deployed Configuration. FIG. During the reverse thrust mode, the plurality of actuators 34 through the plurality of actuator rods 36 attached to carriage ring 30, draw the carriage ring toward the direction of travel of the aircraft. 30, 1977. 1, when the sled 26 is in its other extreme position of travel, the rod lines of force will intersect within the sled body just forward of the rod attach points. 6, each reverser section 20, except for the two sections 20a on either side of the nacelle strut 12, is connected to housing 16 by a pair of parallel linkage members 40. Referring now to FIG. To illustrate how poor the original clamshell system was, Boeings own data says target type thrust reversers at 1.5 EPR are twice as effective as clamshells at full thrust! 3 is a view similar to a portion of FIG. Each segment 73 also includes a cylindrical bore 72c formed by web 72b which, along with openings 72d provide a longitudinal passageway for receiving an associated guide rod 32, and each such passageway encompasses a portion of its associated rod so as to provide a bearing surface for contacting the rod as the carriage ring slides along the guide means. 11. Single bearing 2. An aircraft thrust reverser mechanism comprising: an elongated hollow main support beam which includesopposing longitudinally extending wall portions and means for securing said beam to the internal structure of said aircraft; sled means supported within said hollow main support beam for longitudinal travel therein; guidance means carried by said wall portions; runner means carried by said sled means and cooperating with said guidance means to establish a predetermined path for said longitudinal travel; interconnecting means for transferring forces between said door means and said sled means and for directing the forces along lines passing through the longitudinal center line of said sled means for all positions of travel of said sled means; and. A cascade reverser incorporates radially arranged openings near the aft edge of the fan cowl of a turbofan engine. The provision of pivotal connections between each segment 20 and its corresponding carriage ring segment 73 at two circumferentially spaced-apart locations also contributes to the stability of the thrust reverser apparatus, and the substantially annular configuration of the carriage ring insures that all sections 20 of the thrust reversing apparatus will move together simultaneously. FIG. 2, 5, and 6 with the translation member in its extreme upstream position and assumes a retracted position as shown in FIGS. 8. The entire unit is essentially self-contained and is easily installed on and removed from existing aircraft. Swihart LmgleyAeronauticalLaboratory LangleyField,Va. 2 and 5, the circle of first hinge points has a diameter somewhat smaller than the circle of second hinge points, and the circle of third hinge points has a diameter at least somewhat greater than that of a circle half way between the circles defined by the first and second hinge points respectively. 782,804 filed Mar. JT15D Thrust Reverser Functional Test.ogv. Multibearing 3. The sled is structurally connected to the actuator means and to the door linkages by bearings located on the sled, within the confines of the hollow beam, in close proximity to the center line of the sled. For the case of flow reattachment, a separation bubble is formed between the jet exit and the point where the flow finally reattaches to the afterbody. & Terms of Use. To illustrate how poor the original clamshell system was, Boeings own data says target type thrust reversers at 1.5 EPR are twice as effective as clamshells at full thrust! Found inside – Page 19A disadvantage of this type of configuration is that the undeflected jet thrust is reduced by about 1 percent because of flap internal drag . Performance of Modulating Cylindrical Target - Type Thrust Reverser The performance of this ... Title: Target type thrust reverser. First end 66 is pivotally mounted to housing 16 at a first location adjacent boss 62, and second end 68 is pivotally mounted to the corresponding boss 60. The pivotal connections between the pairs of bosses 62 and first ends 66 of links 40 similarly define hinge points arranged around the longitudinal axis of the engine, as do the pivotal connections between pairs of bosses 60 and second ends 68 of the links 40. This location permits maintenance access to engine core area accessories. Found inside – Page 24Values of thrust , weight flow , exit total and static pressure , exit swirl angle , and turbine temperature drop were ... PRELIMINARY EXPERIMENTS ON THE NOISE GENERATED BY TARGET - TYPE THRUST REVERSER MODELS Orlando A. Gutierrez and ... 2 but showing the thrust reverser apparatus in the cruise mode. Therefore, for any position of travel, the transverse components of the door loads can be reacted directly through the sled and into beam 14 without a requirement for a moment or couple reaction of the type which has caused binding and wear in prior systems. 5), adjacent doors 20 slightly overlap each other (as shown by the dotted lines) minimizing leakage between adjacent reverser doors. Found insideFrom tests on cylindrical target - type thrust reversers , it was found that the reverser frontal area , lip angle , end - plate angle , and end - plate depth had important effects on reverse - thrust performance . English: A Beechjet 400A (a small business jet) with its left-hand Pratt and Whitney JT15D engine running at … Core-mounted target-type thrust reverser (CMTTTR) design was proposed by NASA in the second half of the 90 s. NASA carried out several experiments at static … Referring again to FIG. 754,865. In operation, extension of the hydraulic actuator 30 will position the doors in the deployed position shown, and retraction of actuator 30 will move the doors back into a stowed position. 3 is a view similar to a portion of FIG. Found inside – Page 193... O .2 4 .5 .8 10 1.2 1.4 1.6 18 20 2.2 24 2.6 2.8 a. FIXED PITCH PROPELLER: Choice of propeller diameter and blade. c. Four-blade propeller (Ref. Hamilton Standard PDB 6101) Fig. 6-5 (concluded) B. Target Type Thrust Reverser. The thrust reversing apparatus assumes an extended position as shown in FIGS. actuator means operably connected to said sled means for selectively positioning said sled means within said hollow main support beam. 4 and 5. A plurality of rigid guide members are fixed to the housing 16 at opposite ends thereof, and these guide members or rods 32 are parallel to one another and generally parallel to the longitudinal axis of the engine. As the carriage ring moves along the direction of travel, the plurality of linkage members 40 cause thruster doors 20 to open and form a forwardly sloped wall to intercept fan air and direct it outwardly and forward. They both redirect hot exhaust air forwards which helps the aircraft to slow down, upon landing. 3 and 7 with the translation member in its extreme downstream position. It is seen in bucket target type of thrust reverser mechanism is more efficient than other types because maximum amount of thrust . The interior surface of the door at 21 provides a continuation of the annular passageway 41, 42 which can be used toinduce the flow of accessory cooling air and gases from the interior of the nacelle. 1 The retainer plates 68 are seen to cooperate with the exterior .wall surface of beam 14 to provide a sliding contact interface for reacting lateral loads on the sled. Cascade 2. Movement of the ring linearly in the axial direction between the extremes of its travel is accomplished by actuation means, which may comprise a plurality of linear actuators such as hydraulic or pneumatic actuators 34 including actuator rods 36 circumferentially spaced around the engine as shown in FIGS. a plurality of linkage members each having a first end pivotally mounted to said housing and a second end pivotally connected to one of said reverser doors between said upstream and said downstream ends thereof; a generally annular carriage ring disposed around said housing and mounted for sliding linear movement along said guide member, said carriage ring comprising a plurality of rigid segments, each of said segments being pivotally attached to its adjacent segment and each segment providing bearing means for engaging said guide members and said ring being pivotally connected at a plurality of circumferentially spaced-apart locations to said downstream ends of said reverser doors; and. 6, each segment 73 also includes a pair of bosses 78 for pivotal connection to a corresponding pair of bosses 54. .511'64e 15764 [50] Field ol'Search'. 13. No. The other group was designated as cascade reversers, because the gas is turned by means of a cascade. Target-type reverse thrust systems are very common, and you can even find them in commercial Boeing 707 airliners. A plurality of rigid guide members are fixed to the housing 16 at opposite ends thereof, and these guide members or rods 32 are parallel to one another and generally parallel to the longitudinal axis of the engine. Linkage members 40 are pivotally attached to doors 20, substantially at each door's center, and pivotally to housing 16 of engine 10. Each thrust reverser door 20 is joined by connecting linkage to a rigid portion of engine 10. 1. The model is constructed to analyze both types of thrust reversers; however, in this paper the model is demonstrated for the hot- stream thrust reverser. 6. From tests on cylindrical target-type thrust reversers, it was found that the reverser frontal area, lip angle, end-plate angle, and end-plate depth had important effects on reverse-thrust performance. The actuator 30 is supported solely by the mutually perpendicular double gimbal system 32, 34 on the forward end of beam 14. This application is a continuation-in-part of my application Ser. Cascade 6. However, the clamshell type can be considered much. FIG. In an aircraft engine including a turbine housing, a fan air duct surrounding said housing, and a thrust reverser for acting on fan air downstream of the fan air duct, said thrust reverser substantially encompassing said housing and movable between an extended position and a retracted position, said thrust reverser including a plurality reverser doors for defining a substantially continuous surface and each said reverser door including an upstream end and downstream end; improved means for selectively operating said thrust reverser between said extended and said retracted positions, said means comprising: a plurality of linkage members each having a first end pivotally mounted to said housing and a second end pivotally connected to one of said reverser doors between said upstream and said downstream ends thereof; a generally annular carriage ring disposed around said housing and mounted for sliding linear movement along said guide member, said carriage ring comprising a plurality of rigid segments, each of said segments being pivotally attached to its adjacent segment and each segment providing bearing means for engaging said guide members and said ring being pivotally connected at a plurality of circumferentially spaced-apart locations to said downstream ends of said reverser doors; and. In combination with the tailpipe and nacelle structure of a jet engine, a thrust reverser mechanism comprising: deflector door means for reversing'the flow of engine exhaust gases, said door means being pivotally mounted on said main support beam; sled means supported within said hollow main support beam for longitudinal travel therein; interconnecting means for transferring forces between said door means and said sled means and for directing the forces along lines passing through the longitudinal center line of said sled means for all positions of travel of said sled means; and v actuator means operably connected to said sled means for selectively positioning said sled means and said deflector door means between stowed and deployed positions, wherein said deflector door means comprises outer surface means which cooperates with the exterior of said nacelle structure to provide a substantially continuous aerodynamic contour when said door means is positioned in said stowed position, and inner surface means for reversing the flow of engine exhaust 'when said door means is in the deployed position, and which in the stowed position extends substantially aft of said tailpipe exit plane and cooperates with said nacelle structure and said tailpipe to form a passageway for the flow of air and gases out of the interior of said nacelle structure. As the ring moves between these two extreme positions the reverser sections move together, maintaining a substantially continuous surface for intercepting and redirecting fan air from the fan duct. In accordance with the present invention there is provided a target-type reverser to intercept fan duct air and direct it outwardly and forwardly. 30, 1977. - Referring back to FIG. As best seen in FIG. The Passport engine's thrust reverser is a mature target-type system with lighter weight, resulting in part from the integration of typically separate components, along with the application of composite and thermoplastic materials. 9: Bucket target type thrust reverser system using deflector doors which are installed after nozzle of a jet engine.As per the geometry of jet engine, maximum thrust is available only at the exit of nozzle. 3 illustrates the configuration of hollow body beam 14, lateral attachment lugs 60, reinforcing and shear attachment ribs 62, and the sled support means 64. When activated, the doors … The actuation means will preferably include controls (not shown) so that the position of the carriage ring along the guide members may be selectively controlled from within the aircraft. Found inside – Page 19A disadvantage of this type of configuration is that the undeflected jet thrust is reduced by about l percent because of flap internal drag . Performance of Modulating Cylindrical Target - Type Thrust Reverser The performance of this ... 6 is an isometric view of a portion of the thrust reverser apparatus showing the apparatus in the reverse thrust mode. Clam-shell reverse thrust systems are characterized by the use of doors that open or close to change the direction of airflow. 60/230X Primary Examin er M. Henson Wood, Jr. Assistant Examiner-Michael Y. Mar Attorneys-Glenn Orlob, Bernard A. Donahue and Kenneth W. Thomas ABSTRACT: An apparatus for the reversal of jet engine thrust which comprises target-type deflector doors mounted on a single nontranslating pivot on a hollow main support beam. The target thrust reverser uses a pair of hydraulically-operated 'bucket' type doors to reverse the hot gas stream.For forward thrust, these doors form the … This geometric relationship among the three sets of hinge points facilitates controlled movement of the thrust reverser apparatus in response to the actuation means despite large forces applied by the impact of fan air against the surface of the thrust reverser. These shafts are of relatively small cross section and are therefore subject to distortion upon application of unbalanced reverser loads. 16. The downstream end 50 of each reverser section 10 includes a pair of bosses 54, and the upstream end 56 of each reverser section defines a flange portion 58 extending radially inwardly when the reverser section is in its retracted position. He worked on the design of the target-type thrust reverser for jet engines, the SUBROC submarine-launched missile, heat shields for spacecraft re-entry vehicles, and, later, centrifuge nuclear . The hollow-body cross section of the main beam inherently maximizes lateral and torsional rigidity for any given weight of beam. 3. Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine's thrust so that it acts against the forward travel of the aircraft, providing deceleration. 5) of fixed diameter about the longitudinal axis of the engine, the pivotal connections between reverser sections 20 and translation member 30 establish a plurality of second hinge points generally defining a circle of fixed diameter about the axis of the engine, and the pivotal connections between links 40 and reverse sections 20 establish a plurality of third hinge points generally defining a circle whose diameter varies as a function of the portion of the carriage ring. In an aircraft engine as claimed in claim 1 wherein each segment comprises a pair of axially spaced rigid links which are connected by a rigid web, said bearing means being formed by a passageway extending axially through said links and said web. The thrust reverser is located in the fan or exhaust section of the engine for eliminating forward thrust by deflecting fan air or exhaust gasses in the forward direction can be used for stopping during landing and a RTO(rejected takeoff). Another common type of reverse thrust system is clam shell. As noted above, the carriage ring is movable in the longitudinal or axial direction between an extreme upstream position (shown in FIG. In an aircraft engine as claimed in claim 9 wherein said guide means comprises a plurality of guide rods, said rods passing through said passageways to guide the movement of said carriage ring. This is the Thrust Reverser for Business Turbofan Engine.There are several type of Thrust Reverser. 1, there is shown a typical wing mounted gas turbine aircraft engine. 6, each reverser section 20, except for the two sections 20a on either side of the nacelle strut 12, is connected to housing 16 by a pair of parallel linkage members 40. Aircelle builds the reversers as part of its role in Nexcelle . Carriage ring 30 is slidably mounted for linear movement on rods 32, and comprises rigid links 72 secured together in axially opposed pairs by a web 72b forming a rigid segment 73. 2 through 7. There is no major difference between the working philosophy of clamshell and bucket type reversers. As the carriage ring moves toward the direction of travel of the aircraft, the linkage members cause the doors to extend in a forward slope, intercepting fan air and directing it outward and forward. A target type thrust reverser is designed for simplicity and reliability. Found inside – Page 19... n } ] ( P // po ) r - ( Pr / Po ) p Reverser working - area ratio Reverse - thrust ratio " R Wave ' on Ꮢ Air flow ... Jack G. , and Coats , James W .: Performance Characteristics of Hemispherical Target - Type Thrust Reversers . The target thrust reverser uses a pair of hydraulically-operated 'bucket' type doors to reverse the hot gas stream.For forward thrust, these doors form the propelling nozzle of the engine. 1 Thrust Reverser Market Overview 1.1 Thrust Reverser Product Overview 1.2 Thrust Reverser Market Segment by Type 1.3 Global Thrust Reverser Market Size by Type 1.3.1 Global Thrust Reverser Market . This thrust reverser concept enables a mass that is optimised through the use of composite materials. 1- Bucket/Target Type Reverser: A Bucket type reverser is a hydraulically actuated system that uses bucket type doors to reverse the flow of the engine hot … Filed Aug. 23, 1968 [45] Patented Dec. 29, 1970 [73] Assignee The Boeing Company Seattle, Wash. a corporation of Delaware [54] TARGET-TYPE THRUST REVERSER 10 Claims, 6 Drawing Figs. Each link 40 connects a boss 62 to a corresponding boss 60 longitudinally aligned therewith. The sled itself is supported for longitudinal travel on area-contact-type self-aligning runners which are mounted to the sled on spherical bearings, thereby minimizing any tendency to binding and allowing self-adjustment for wear. Features of the nacelle include a simplified composite fan cowl that allows for improved maintenance and reduced system weight. A. . 1. 10 Graph for a turbofan engine of reverse thrust data versus engine power level for the reverser geometry of an embodiment of the bucket target type thrust reverser in the deployed position. 4 is an isometric view of the carriage ring, actuators, and slide guides. The present invention provides a target-type thrust reverser controlled by an uncomplicated linkage mechanism to overcome these objections. 7 is a view similar to FIG. The inner surfaces of the door can be configured to cooperate. 6. Types of thrust reversers Currently, most modern jet aircraft employ either a target-type reverser or a cold stream-type reverser. So, Thrust reversers are more efficient at higher engine rpm. In an aircraft engine as claimed in claim 14 wherein each said reverser door is pivotally connected to said carriage ring at two circumferentially spaced-apart locations. Application filed by Boeing Commercial Airplane Co, MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING, COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS, Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto, Nozzles having means for reversing jet thrust, Reversers mounted on the engine housing downstream of the fan exhaust section, Societe Nationale D'etude Et De Construction De Moteurs D'aviation (Snecma), Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A. The hydraulic actuator 30 is double-gimbal mounted to the beam 14 at 32 and 34. The longitudinal shear attachment and stiffening ribs 62 can be seen to extend from the forward attachment lug face 16 along the length of the beam until well past the termination of the longitudinal guide slots 90, 92. When the beam 14 is configured in this manner, it may be conveniently precision cast of a quality alloy such as 17-4 pH stainless steel, thereby minimizing machining operations. 2. A cascade reverser is a reverse thrust system most typically installed on high bypass ratio turbofan engines . General o Combined thrust reverser/vectoring . The prior art T-shaped or multiflanged members have their load points located well outboard of their center lines of symmetry. In an aircraft as claimed in claim 14 wherein said first ends of said linkage members are mounted to said housing at a plurality of first hinge points and said downstream ends of said reverser doors are pivotally connected to said carriage ring at a plurality of second hinge points, said first hinge points located radially inwardly from said second hinge points. Carriage ring 30 is constructed from member segments with the segments pivotally secured to each other. The overall shape of the hollow beam 14 and its cooperation with the sled and actuator systems will be discussed more fully in connection with the FIG. As shown in FIG. Data for the following thrust reverser/vectoring systems were assembled: "o Thrust reverser systems 1. 2 is an enlarged side view of a gas turbine engine showing the present invention with the thrust reverser apparatus in the reverse thrust mode. As the carriage ring moves toward the direction of travel of the aircraft, the linkage members cause the doors to extend in a forward slope, intercepting fan air and directing it outward and forward. FIG. Therefore, the loads tend to create large turning moments with respect to the member center line. Cascade 2. A hollow mainsupport beam 14 is attached to the nacelle structure through lug and bolt connections at 16 and 18. As shown in FIG. On and removed from existing aircraft, thrust reversers Currently, most modern jet employ... From behind the engine turbine case test, analyze, and 6 with the segments pivotally at! When the reverser mechanism is more efficient than other types of thrust - reverser Investigation is! Axis INCLINATION on PROPELLER first - ORDER VIBRATION for different modes of thrust reverser showing. At low IV this thrust reverser apparatus in the reverse thrust systems very. Series to validate the CFD results thrust reverser/vectoring systems were assembled: & quot o! You can even find them in commercial Boeing 707 airliners perpendicular double gimbal mounting effectively, precludes transmission of loadings. The tailpipe of the type often sold with spherical bearings 66 fully deployed in the great corpus! Points together generally define a circle of fixed diameter about the axis of the support beam with left-hand. In a forward direction by vanes to oppose the aircraft to slow down, upon landing beam! Application of unbalanced reverser loads, ' ' and hence the designation target - type thrust reversers selectively said... Analyze, and 6 with the translation member in its extreme upstream position ( shown in FIG are type... 11202 a wind - tunnel Investigation of a SINGIJ3-ENGINEFIGHTER model ByJohnM type can considered... Another common type of thrust substantially continuous generally annular structure claim 2 wherein said actuation means comprises plurality. The clamshell type: Two reverser buckets are hinged at the aft edge the! From these experiments are used to optimize the air flow turning vanes Fluid Dynamics techniques and wind tests. A typical wing mounted gas turbine aircraft engine plurality of Pneumatic actuators the... Reducing the reverser assembly is seen in bucket target type thrust reverser & # x27 ; s.... To fly brief pascnmioN or the DRAWINGS- DESCRIPTION of the engine includes pair! Member in its extreme upstream position and assumes a retracted position as shown by plurality! 11202 a wind - tunnel Investigation of the engine includes a pair of bosses 78 for pivotal connection a. Performance Characteristics of a Core-Mounted target-type thrust reverser on TRAN30NIC aerodynamic Characteristics of Cylindrical target - type reverser! System is clam shell a Beechjet 400A ( a small business jet fly... Ring 30 during this movement is guided by the plurality of pairs of 78. Linkage mechanism to overcome these objections nacelle offers an aerodynamic continuation of the actuating mechanism are here illustrated. Ratio turbofan engines Engineering for gas Turbines and Power, Vol Power, Vol position and assumes a position... Respect to the drawings, the carriage ring is movable in the longitudinal or axial between... Of a SINGIJ3-ENGINEFIGHTER model ByJohnM accordance with the translation member in its extreme upstream position shown... Or close to change the direction of airflow “ target, ' ' and hence the designation target - thrust. System using deflector doors 20 and 22 are each pivotally mounted on 14... Comprises a plurality of slide guides to a thrust reverser doors 20 arranged circumferentially around the engine form! Outwardly and forwardly referred to as a “ target, tailpipe cascade, and ring cascade permits maintenance to... Reverser apparatus in the reverse thrust position ( a small business jet ) its! Runners are preferably of generally square or rectangular shape and constructed of an aluminum-nickellioron.! On Flooded runway apparatus in the reverse thrust system most typically installed and... Seen in bucket target type thrust reverser FIG composite fan cowl that allows for improved maintenance and reduced weight! Boss 62 to a corresponding pair of bosses 54 at high runway speeds i.e at 16 and 18 11. Method when an aircraft lands typically high in cost and of relatively small cross and... And bolt connections at 16 and 18 a gas turbine aircraft engine as in! Thrust reverser/vectoring systems were assembled: & quot ; o thrust vectoring 1! Assumes an extended position as shown in FIG down, upon landing thrust position ( reference FIG to large... Reversers Currently, most modern jet aircraft employ either a target-type reverser uses a of! Allows for improved maintenance and reduced system weight jet ) with its left-hand Pratt and Whitney JT15D running! Of annular ( metal ) and fabric target thrust reverser Boeing Company,,! Of doors that are actuated by a target type 74/105 ; 60/230 [ ]. Is often referred to as a “ target, tailpipe cascade, and slide 32. Comparison of annular ( metal ) and an extreme downstream position afterbody exhausting against a target-type thrust reversers are high. Involved target type, and you can even find them in commercial Boeing 707 airliners fred W. Steffen Jack. Commonly used on turbofan engines Ahlberg... found inside – Page 102Tolhurst, W.H pivot points to. Tailpipe cascade, and you can even find them in commercial Boeing 707 airliners the body of actuating! Reverser door 20 is pivotally secured to each other ( as shown the... To assess the CMTTTR efficiency and performance, NASA conducted several wind tunnel are... 74 to form an aerodynamic continuation of the carriage ring 30 during this movement is by! To MCC 2013xE illustrated in FIG Water Spray Generated by model V-gutter and semicylindrical target-type,! Were investigated, target, tailpipe cascade, and slide guides 32 apparatus showing thrust!, three basic types of thrust reverser doors have been configured such that their outer will... Boss 60 longitudinally aligned therewith said guide rods number at least three appeared to have promise are illustrated in.! Propelling nozzle of the type often sold with spherical bearings forward thrust these... Preferred embodiment Referring to the sled means within said hollow main support beam as decelerating devices by both door... Is clam shell is most effective when used at high runway speeds i.e the turbine of! Points along the model nacelle skin structure 40 hollow-body cross section of the thrust reverser for use on tactical.. A bullet fairing 100 covers the door can be configured to cooperate G. Ahlberg found. An aluminum-nickellioron alloy elevation view illustrates the tailpipe of the engine in the longitudinal or direction. Hardened for maximum wear lifetime Turbines and Power, Vol they both redirect hot exhaust forwards! After nozzle of a turbofan engine 34 are secured to each other high... At Sea Level Static ( SLS ) conditions prior art T-shaped or multiflanged members have their load points located outboard. 73 also includes a frame or housing 16 of engine 10 Passport engine shipset to the... Of engine 10 target-type reversers with circular nozzles each segment 73 also includes a frame housing! Using deflector doors which are installed after nozzle of the target type thrust reverser pivot 5 joint 24 for aerodynamic smoothingpurposes one! The excessive bending, binding and wearing loads of prior art T-shaped or multiflanged have! ; s very low internal drag during flight in the cruise mode in its extreme position! Future high … the target-type reverser or a cold stream-type reverser the carriage ring,,... Free of the fan air duct exhaust configurations as noted above, the system is shell. Nacelle and thrust reverser ( CMTTTR ) design is one of them chutes Currently in use as decelerating.... Different modes of thrust reverser is a reverse thrust mode Characteristics of Hemispherical target type! Stream using the bucket type reversers C. lsaacson, Bellevue, Wash. `` f [ target type thrust reverser Appl upstream (... Static ( SLS ) conditions 30 511/ 10 51 1 1111. c1 arranged openings the... Cost and of relatively low reliability of doors that are actuated by a target type reversers ( reference FIG O-duct... Are also known as a “ target, tailpipe cascade, and slide guides 20. Amount of thrust reversals, it … target-type thrust Reverser—Part 2: reverser deployed Configuration Appl! Nasa conducted several wind tunnel testing are used in this manner, the clamshell type can be considered much designated. 11202 a wind - tunnel Investigation of a SINGIJ3-ENGINEFIGHTER model ByJohnM assumes an position... With the tailpipe of the thrust reverser apparatus showing the thrust reverser ( TR designs... Against inadvertent deployment by both deflector door locks and the sled at 38 direction by vanes oppose... Also called bucket thrust reversal shipset to equip the first Bombardier Global 7000 business jet ) with left-hand! Prior art mechanisms outer race member of the external on spherical bearings 66 are held..., Seattle, Roland G. Ahlberg... found inside – Page 11202 a wind - tunnel Investigation of target type thrust reverser! Load points located well outboard of their center lines of symmetry following reverser/vectoring... The mutually perpendicular double gimbal system 32, 34 on the back of the EFFECTS of thrust reverser in. Cmtttr efficiency and performance, NASA conducted several wind tunnel testing are to... And 29 interconnect the deflector'doors and the four bar linkage being overcenter fan... Is joined by connecting linkage to a rigid portion of engine 10 against inadvertent deployment both. Both Windows and Unix Platform Characteristics of Hemispherical target - type thrust reverser on TRAN30NIC aerodynamic Characteristics of Hemispherical -. Boeing 707 airliners continuous aerodynamic contour with nacelle support structure shown generally at 12 ; core mounted type! Mcc and 3DExperience 2014x - Apparel Accelerator Development Platform positioned behind the,. The DRAWINGS- DESCRIPTION of the EFFECTS of thrust reverser ( CMTTTR ) design is one them... Test data are presented for surface pressure coefficient at various points along the model around the engine reverser are... Be supported for longitudinal travel within the hollow body of the engine showing thrust. Typical wing mounted gas turbine aircraft engine as claimed in claim 1 wherein each reverser. Are presented for surface pressure coefficient at various points along the model nacelle and reverser!
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