Thrust efficiency hi-res stock photography and images

Hovercrafts line icons collection. Innovation, Versatility, Speed, Maneuverability, Adventure, Efficiency, Excitement vector and linear illustration Stock Vector

RF2PNGPAB–Hovercrafts line icons collection. Innovation, Versatility, Speed, Maneuverability, Adventure, Efficiency, Excitement vector and linear illustration

General Electric expert makes presentation for the foreign oilers about the company oil pumps design and artificial lift in the GE Houston office Stock Photo

RM2T605W6–General Electric expert makes presentation for the foreign oilers about the company oil pumps design and artificial lift in the GE Houston office

jet engine is a reaction engine discharging a fast-moving air that generates thrust by turbine blades work at moderate temperatures to very high tempe Stock Vector

RFP1YD6A–jet engine is a reaction engine discharging a fast-moving air that generates thrust by turbine blades work at moderate temperatures to very high tempe

A Spanish Airforce McDonnell Douglas AV-8B Harrier II in a full hover. First entered service in 1973, and still being used by the Spanish and Italians Stock Photo

RF2T5XMHB–A Spanish Airforce McDonnell Douglas AV-8B Harrier II in a full hover. First entered service in 1973, and still being used by the Spanish and Italians

Aircraft Winglet Aids flight efficiency and reduces Air fare operational costs. XAV 4398-418 Stock Photo

RMA2C8DK–Aircraft Winglet Aids flight efficiency and reduces Air fare operational costs. XAV 4398-418

The posture of school children, with its home hygiene and new efficiency methods for school training . 1. — To allow this cannot be called teaching. tion (Fig. 92). In the companion cut, inattention to the posi-tion of the elbows has led to rounding the shoulders still fartherforward with accompanying protrusion of the shoulder bladesbehind ; the head has been thrust forward and the chest retracted.The execution of corrective exercises so that they do correct is theobject of all gymnastic work for posture. It is the only means ofdeveloping weak muscles and changing faulty coordination.It is th Stock Photo

RM2AWK888–The posture of school children, with its home hygiene and new efficiency methods for school training . 1. — To allow this cannot be called teaching. tion (Fig. 92). In the companion cut, inattention to the posi-tion of the elbows has led to rounding the shoulders still fartherforward with accompanying protrusion of the shoulder bladesbehind ; the head has been thrust forward and the chest retracted.The execution of corrective exercises so that they do correct is theobject of all gymnastic work for posture. It is the only means ofdeveloping weak muscles and changing faulty coordination.It is th

AJAXNETPHOTO. 1989. PLYMOUTH, ENGLAND. - WALKER WINGSAIL TRIMARAN ZEFRR ON SAILING TRIALS IN THE SOUND. PHOTO:WALKER WINGSAIL/AJAX REF:ZEFRR 42 Stock Photo

RMJCR45H–AJAXNETPHOTO. 1989. PLYMOUTH, ENGLAND. - WALKER WINGSAIL TRIMARAN ZEFRR ON SAILING TRIALS IN THE SOUND. PHOTO:WALKER WINGSAIL/AJAX REF:ZEFRR 42

RF2XFDFGC–Black solid icon of a turbojet engine with afterburner, representing aerospace propulsion technology

RFG13NFW–Jet turbine Closeup

Ships propeller on fishing boat in dry dock for repairs, Sichon, Thailand Stock Photo

RFRA6078–Ships propeller on fishing boat in dry dock for repairs, Sichon, Thailand

A Rolls Royce Trent 1000 turbofan engine mounted on a new Boeing 787 Dreamliner for Virgin Atlantic. Stock Photo

RME9TT13–A Rolls Royce Trent 1000 turbofan engine mounted on a new Boeing 787 Dreamliner for Virgin Atlantic.

N404AN American Airlines Airbus A321-253NX Departing Los Angeles International (LAX / KLAX) Stock Photo

RM2RR4XD1–N404AN American Airlines Airbus A321-253NX Departing Los Angeles International (LAX / KLAX)

RFKR2GTR–Jet turbine Closeup

Closeup of a Learjet 45XR engine intake. Stock Photo

RMF03E9E–Closeup of a Learjet 45XR engine intake.

RFKRHNAE–Jet turbine Closeup

RFKW9FK0–Jet engine

Commercial Upturn linear icons set. Boom, Recovery, Resurgence, Expansion, Growth, Flourishing, Revitalization line vector and concept signs. Thriving Stock Vector

RF2PP31GE–Commercial Upturn linear icons set. Boom, Recovery, Resurgence, Expansion, Growth, Flourishing, Revitalization line vector and concept signs. Thriving

Aircraft engine parts separated during the disassembly process in the mechanic workshop Stock Photo

RF2JN3G4A–Aircraft engine parts separated during the disassembly process in the mechanic workshop

MOSCOW, RUSSIA - MAY 7, 2021: helicopter flies against the backdrop of Moscow City skyscrapers Stock Photo

RF2HF2YG7–MOSCOW, RUSSIA - MAY 7, 2021: helicopter flies against the backdrop of Moscow City skyscrapers

Turbopost line icons collection. Accelerate, Boost, Streamline, Efficiency, Rapid, Quick, Velocity vector and linear illustration. Momentum,Propel Stock Vector

RF2PNGCN8–Turbopost line icons collection. Accelerate, Boost, Streamline, Efficiency, Rapid, Quick, Velocity vector and linear illustration. Momentum,Propel

Aircraft's wing, engine, and landing gear Stock Photo

RF2R0D45X–Aircraft's wing, engine, and landing gear

Compressibility Factor (Z) and pressure bar Stock Vector

RF2NH4BGD–Compressibility Factor (Z) and pressure bar

A Lockheed Martin F-35B Lightning II during a full hover Stock Photo

RF2T5XMGF–A Lockheed Martin F-35B Lightning II during a full hover

Aircraft Winglet Aids flight efficiency and reduces Air fare operational costs. XAV 4399-418 Stock Photo

RFA2C8CY–Aircraft Winglet Aids flight efficiency and reduces Air fare operational costs. XAV 4399-418

The posture of school children, with its home hygiene and new efficiency methods for school training . lothing. At the sametime the outer tip or roundof the shoulder is forced for-ward so that there is an un-naturally deep hollow on thefront between the tip of theshoulder and the neck. Theharm of this oblique or for-ward position of the shoulderblade lies, as before intimated, Fig. 32. —Wing shoulder blades on a child jn the fact that the Weightof six years of age. of the arms and the entireshoulder girdle is thrust too far forward, tending to drag the chestdownward and prevent free action in Stock Photo

RM2AWMPDA–The posture of school children, with its home hygiene and new efficiency methods for school training . lothing. At the sametime the outer tip or roundof the shoulder is forced for-ward so that there is an un-naturally deep hollow on thefront between the tip of theshoulder and the neck. Theharm of this oblique or for-ward position of the shoulderblade lies, as before intimated, Fig. 32. —Wing shoulder blades on a child jn the fact that the Weightof six years of age. of the arms and the entireshoulder girdle is thrust too far forward, tending to drag the chestdownward and prevent free action in

AJAXNETPHOTO. 1989. PLYMOUTH, ENGLAND. - WALKER WINGSAIL TRIMARAN ZEFRR ON SAILING TRIALS IN THE SOUND. PHOTO:WALKER WINGSAIL/AJAX REF:ZEFRR 43 Stock Photo

RMJCR45J–AJAXNETPHOTO. 1989. PLYMOUTH, ENGLAND. - WALKER WINGSAIL TRIMARAN ZEFRR ON SAILING TRIALS IN THE SOUND. PHOTO:WALKER WINGSAIL/AJAX REF:ZEFRR 43

RFGNA8P5–Jet engine inlet vanes

RFG31GF4–Jet turbine Closeup

AJAXNETPHOTO. 1982. SOUTHAMPTON, ENGLAND. - FLOWER POWER - HUGE PORT PROPELLOR OF THE CUNARD LINER QE2 DOMINATES A VISITOR TO THE KING GEORGE V DRY DOCK WHERE THE LINER WAS UNDERGOING RESTORATION FROM FALKLAND'S TROOPSHIP TO PASSENGER DUTIES. PHOTO: JONATHAN EASTLAND/AJAX. REF: HDD/SHI/LIN/QE2/PROP Stock Photo

RMFTMP45–AJAXNETPHOTO. 1982. SOUTHAMPTON, ENGLAND. - FLOWER POWER - HUGE PORT PROPELLOR OF THE CUNARD LINER QE2 DOMINATES A VISITOR TO THE KING GEORGE V DRY DOCK WHERE THE LINER WAS UNDERGOING RESTORATION FROM FALKLAND'S TROOPSHIP TO PASSENGER DUTIES. PHOTO: JONATHAN EASTLAND/AJAX. REF: HDD/SHI/LIN/QE2/PROP

RME9TRYR–A Rolls Royce Trent 1000 turbofan engine mounted on a new Boeing 787 Dreamliner for Virgin Atlantic.

N38458 United Airlines Boeing 737-924ER(WL) Departing Los Angeles International (LAX / KLAX) Stock Photo

RM2RR4XCP–N38458 United Airlines Boeing 737-924ER(WL) Departing Los Angeles International (LAX / KLAX)

RMH3HHDD–Gulfstream G650

Detail of the great pair of engines of a patrol boat of the Spanish army, the Navy Ship P-84 Isla Pinto Stock Photo

RF2Y2X69R–Detail of the great pair of engines of a patrol boat of the Spanish army, the Navy Ship P-84 Isla Pinto

Sailboat pulled by Blue Spinnaker Stock Photo

RMDHJD4E–Sailboat pulled by Blue Spinnaker

RFKW9FJY–Jet engine

RF2PP3KK7–Commercial Upturn linear icons set. Boom, Recovery, Resurgence, Expansion, Growth, Flourishing, Revitalization line vector and concept signs. Thriving

The engine of an aircraft in the workshop in process of disassembly Stock Photo

RF2JN3GND–The engine of an aircraft in the workshop in process of disassembly

Gas turbine aircraft engine isolated on white background Stock Photo

RFR6J900–Gas turbine aircraft engine isolated on white background

Drive line icons collection. Accelerate, Motivate, Movement, Fuel, Action, Impetus, Ambition vector and linear illustration. Thrust,Impulse,Push Stock Vector

RF2PP0C27–Drive line icons collection. Accelerate, Motivate, Movement, Fuel, Action, Impetus, Ambition vector and linear illustration. Thrust,Impulse,Push

Commuters being pushed into a train travelling from Yokohama to Tokyo at morning rush hour. Stock Photo

RMB11D7R–Commuters being pushed into a train travelling from Yokohama to Tokyo at morning rush hour.

Motocross racers moves along sandy parapet track per motorcycle large plume of sand. Footage. Motorcyclists aspire to finish on sandy road. The motorcyclists maneuvers on abrupt sandy turn Stock Photo

RFKBXGRD–Motocross racers moves along sandy parapet track per motorcycle large plume of sand. Footage. Motorcyclists aspire to finish on sandy road. The motorcyclists maneuvers on abrupt sandy turn

RF2X8H5TF–Simplistic vector icon representing a jet engine, suitable for various design projects

The posture of school children, with its home hygiene and new efficiency methods for school training . FiG. 90. — An exercise performed so thatit corrects posture. {This and threeillustrations following by permission ofD. C. Heath b° Co., from Bancrofts SchoolGymnastics.) Fig. 91. — To allow this cannot be called teaching. tion (Fig. 92). In the companion cut, inattention to the posi-tion of the elbows has led to rounding the shoulders still fartherforward with accompanying protrusion of the shoulder bladesbehind ; the head has been thrust forward and the chest retracted.The execution of corre Stock Photo

RM2AWK8EC–The posture of school children, with its home hygiene and new efficiency methods for school training . FiG. 90. — An exercise performed so thatit corrects posture. {This and threeillustrations following by permission ofD. C. Heath b° Co., from Bancrofts SchoolGymnastics.) Fig. 91. — To allow this cannot be called teaching. tion (Fig. 92). In the companion cut, inattention to the posi-tion of the elbows has led to rounding the shoulders still fartherforward with accompanying protrusion of the shoulder bladesbehind ; the head has been thrust forward and the chest retracted.The execution of corre

Jet engine inlet turbo vanes Stock Photo

RFGN9GA4–Jet engine inlet turbo vanes

N407AS Alaska Airlines Boeing 737-990ER(WL) Departing Los Angeles International (LAX / KLAX) Stock Photo

RM2RR4XCW–N407AS Alaska Airlines Boeing 737-990ER(WL) Departing Los Angeles International (LAX / KLAX)

RF2Y2X697–Detail of the great pair of engines of a patrol boat of the Spanish army, the Navy Ship P-84 Isla Pinto

RFKW9FJT–Jet engine

RFR6J8YX–Gas turbine aircraft engine isolated on white background

Potency line icons collection. Vigor, Strength, Potence, Energy, Potentiation, Stamina, Might vector and linear illustration. Influence,Dominance Stock Vector

RF2PNKNM5–Potency line icons collection. Vigor, Strength, Potence, Energy, Potentiation, Stamina, Might vector and linear illustration. Influence,Dominance

The posture of school children, with its home hygiene and new efficiency methods for school training . ition, these muscles might act in justthe opposite direction and pull the neck forward. If the neckbe drawn forward in this manner, however, it almost in-variably results in such a relaxation of these sterno-cleido muscles that the chestdroops downward also ina collapsed or sunken posi-tion. The shoulders are nearlyalways too far forwardwhen the head and neckare thrust forward. Hold-ing, as the shoulders do,the weight of the arms, aforward sag of the chestor back gives them the ex-cuse for sl Stock Photo

RM2AWMYAY–The posture of school children, with its home hygiene and new efficiency methods for school training . ition, these muscles might act in justthe opposite direction and pull the neck forward. If the neckbe drawn forward in this manner, however, it almost in-variably results in such a relaxation of these sterno-cleido muscles that the chestdroops downward also ina collapsed or sunken posi-tion. The shoulders are nearlyalways too far forwardwhen the head and neckare thrust forward. Hold-ing, as the shoulders do,the weight of the arms, aforward sag of the chestor back gives them the ex-cuse for sl

N503DZ Delta Air Lines Airbus A321-271NX Departing Los Angeles International (LAX / KLAX) Stock Photo

RM2RR4XCR–N503DZ Delta Air Lines Airbus A321-271NX Departing Los Angeles International (LAX / KLAX)

N565AS Alaska Airlines Boeing 737-890(WL) landing at San Diego SAN (KSAN) Stock Photo

RM2T7JHG5–N565AS Alaska Airlines Boeing 737-890(WL) landing at San Diego SAN (KSAN)

The posture of school children, with its home hygiene and new efficiency methods for school training . A.wtii ilj-iA. Fig. 60. — An S-shaped lateral curve of the spine and the effect of sleeping positions upon it. {Courtesy of Dr. Fitz.) If this be true of lateral curves, it applies equally to the antero-posterior curves of the spine. Lying on the back on a very highpillow must obviously thrust the neck forward, while lying onthe side with or without a pillow would increase any tendencyto the forward position of the shoulder blades. This does not mean that one should not lie on the back or ont Stock Photo

RM2AWM6XM–The posture of school children, with its home hygiene and new efficiency methods for school training . A.wtii ilj-iA. Fig. 60. — An S-shaped lateral curve of the spine and the effect of sleeping positions upon it. {Courtesy of Dr. Fitz.) If this be true of lateral curves, it applies equally to the antero-posterior curves of the spine. Lying on the back on a very highpillow must obviously thrust the neck forward, while lying onthe side with or without a pillow would increase any tendencyto the forward position of the shoulder blades. This does not mean that one should not lie on the back or ont

Transactions . s a solid one, as shown in thecases of beams Nos. 28 and 29 A. The keys should be so located that the faces receiving a 736 THE EFFICIENCY OF BUILT-UP WOODEN BEAMS. thrust are perpendicular to the joint between the sticks. Wheninclined keys are used, as in Rankines and Bruneis beams, thecomponent pieces slide up the inclined faces of the keys, pryapart the joint, and the benefit of friction between the faces ofthe sticks is lost. Neither great strength nor stiffness can besecured by any form of key not provided with wedges whichcan be firmly driven up. Any other construction, re Stock Photo

RM2AXCDJ2–Transactions . s a solid one, as shown in thecases of beams Nos. 28 and 29 A. The keys should be so located that the faces receiving a 736 THE EFFICIENCY OF BUILT-UP WOODEN BEAMS. thrust are perpendicular to the joint between the sticks. Wheninclined keys are used, as in Rankines and Bruneis beams, thecomponent pieces slide up the inclined faces of the keys, pryapart the joint, and the benefit of friction between the faces ofthe sticks is lost. Neither great strength nor stiffness can besecured by any form of key not provided with wedges whichcan be firmly driven up. Any other construction, re

Air, Light and Efficiency Showing Influence of Sash Types and Building Design . ng the sashi^ equally divided berween them. See photo-graphs on next page. The worm and gear are cutfrom steel and run in oil in a dust-proof case. at their far ends to a chain running over an idler. To these rods areattached compound le-er arms exerting a thrust against the lowermember of the sash. This thrust is angular at hrst but increasinglydirect as the sash is raised, hence the lifting effort is most effectivewhen the greatest weight is overcome. The rods are always in tension, and the load is divided equal Stock Photo

RM2AJ2W9A–Air, Light and Efficiency Showing Influence of Sash Types and Building Design . ng the sashi^ equally divided berween them. See photo-graphs on next page. The worm and gear are cutfrom steel and run in oil in a dust-proof case. at their far ends to a chain running over an idler. To these rods areattached compound le-er arms exerting a thrust against the lowermember of the sash. This thrust is angular at hrst but increasinglydirect as the sash is raised, hence the lifting effort is most effectivewhen the greatest weight is overcome. The rods are always in tension, and the load is divided equal

Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Idler and power ends of Pond OperatingDevice. Upper and lower rods are continuallvunder tcnsiun and the work of operating the sashi^ equally divided berween them. See photo-graphs on next page. The worm and gear are cutfrom steel and run in oil in a dust-proof case. at their far ends to a chain running over an idler. To these rods areattached compound le-er arms exerting a thrust against the lowermember of the sash. This thrust is angular at hrst but increasinglydirect as the sash is raised, hence the lifting effo Stock Photo

RM2AJ2WHD–Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Idler and power ends of Pond OperatingDevice. Upper and lower rods are continuallvunder tcnsiun and the work of operating the sashi^ equally divided berween them. See photo-graphs on next page. The worm and gear are cutfrom steel and run in oil in a dust-proof case. at their far ends to a chain running over an idler. To these rods areattached compound le-er arms exerting a thrust against the lowermember of the sash. This thrust is angular at hrst but increasinglydirect as the sash is raised, hence the lifting effo

Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . larger than before and the efficiency has been increased. Thevarious kinetic efficiencies for these arrangements of bladeshave been computed and result in the following: Fig. 144a Fig. 1446 Fig. 147 Fig. 149 7jk = 81 per cent.T]k = 78 per cent.rjk = 73 per cent.7]Jc = 84 per cent. These have been drawn with a = cos 10.9. The axial thrust is due to the difference between the impulseat entrance to the moving blade and the reaction at outlet inthe direction of the axis. The force per pound Stock Photo

RM2ANFYPY–Heat engineering; a text book of applied thermodynamics for engineers and students in technical schools . larger than before and the efficiency has been increased. Thevarious kinetic efficiencies for these arrangements of bladeshave been computed and result in the following: Fig. 144a Fig. 1446 Fig. 147 Fig. 149 7jk = 81 per cent.T]k = 78 per cent.rjk = 73 per cent.7]Jc = 84 per cent. These have been drawn with a = cos 10.9. The axial thrust is due to the difference between the impulseat entrance to the moving blade and the reaction at outlet inthe direction of the axis. The force per pound

Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Sash fully opened. The tension of therod is converted into a direct thrust againstthe sash. quickly opened and closed by o?ie responsible person. 43 JS AIR, LIGHT AND EFFICIENCY For unusually lung lines, or to operate a number of lines together,^?e recommend Pond Operating Device, Motor Driven. Thisembodies an A. C. motor specially wound for high starting torque.An automatic cut-out limits the movement of the sash in each direc-tion, and the sash may be controlled by the switch to stand at anydegree of opening des Stock Photo

RM2AJ2P8Y–Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Sash fully opened. The tension of therod is converted into a direct thrust againstthe sash. quickly opened and closed by o?ie responsible person. 43 JS AIR, LIGHT AND EFFICIENCY For unusually lung lines, or to operate a number of lines together,^?e recommend Pond Operating Device, Motor Driven. Thisembodies an A. C. motor specially wound for high starting torque.An automatic cut-out limits the movement of the sash in each direc-tion, and the sash may be controlled by the switch to stand at anydegree of opening des

Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Sash partly open. The T-shaped leversare attached one to each tension rod.. Sash fully opened. The tension of therod is converted into a direct thrust againstthe sash. quickly opened and closed by o?ie responsible person. 43 JS AIR, LIGHT AND EFFICIENCY For unusually lung lines, or to operate a number of lines together,^?e recommend Pond Operating Device, Motor Driven. Thisembodies an A. C. motor specially wound for high starting torque.An automatic cut-out limits the movement of the sash in each direc-tion, and t Stock Photo

RM2AJ2PGG–Air, Light and Efficiency Showing Influence of Sash Types and Building Design . Sash partly open. The T-shaped leversare attached one to each tension rod.. Sash fully opened. The tension of therod is converted into a direct thrust againstthe sash. quickly opened and closed by o?ie responsible person. 43 JS AIR, LIGHT AND EFFICIENCY For unusually lung lines, or to operate a number of lines together,^?e recommend Pond Operating Device, Motor Driven. Thisembodies an A. C. motor specially wound for high starting torque.An automatic cut-out limits the movement of the sash in each direc-tion, and t

. Handbook of construction plant, its cost and efficiency. Fig. 287. No. 1 Revolving Shovel Excavating Cellars. ; R 1 ? . V I j ...ffty ^ jfe Fig. 288. 598 HANDBOOK OF CONSTRUCTION PLANT was also driven by this motor. The swinging machinery wasgeared to a 50 hp. motor, and the thrust motor was also 50-hp.The compressor which furnished air to the hoisting drum brake,the emergency brake on the swing motor, and the friction clutchand brake on the intermediate shaft were driven by a 2-hp. con-stant speed induction motor. A test made on October 14, 1912, when the shovel was workingin a gravel ban Stock Photo

RM2AG4R1H–. Handbook of construction plant, its cost and efficiency. Fig. 287. No. 1 Revolving Shovel Excavating Cellars. ; R 1 ? . V I j ...ffty ^ jfe Fig. 288. 598 HANDBOOK OF CONSTRUCTION PLANT was also driven by this motor. The swinging machinery wasgeared to a 50 hp. motor, and the thrust motor was also 50-hp.The compressor which furnished air to the hoisting drum brake,the emergency brake on the swing motor, and the friction clutchand brake on the intermediate shaft were driven by a 2-hp. con-stant speed induction motor. A test made on October 14, 1912, when the shovel was workingin a gravel ban

Shipbuilding and Shipping Record . (17) Back of blade ... 10 II |£ 13 14 15 16 17 18 19 20 21 22 25 24-2526 PITCH IN FEET That seen by the observer looking from that cuts its way by screwing itself into the water and thus caxisesforward to aft. the ship to advance. The propeller, therefore, which could do July 19, 1917. SHIPBUILDING AND SHIPPING RECORD. 57 this w-ith the minimum of shp was reckoned to have reached the in a sternward direction. Or, as Baker puts it, A screw propellermaximum efficiency. Negative slip was considered a great achieve- is a means of pusliing a ship forward by thrust Stock Photo

RM2AKT902–Shipbuilding and Shipping Record . (17) Back of blade ... 10 II |£ 13 14 15 16 17 18 19 20 21 22 25 24-2526 PITCH IN FEET That seen by the observer looking from that cuts its way by screwing itself into the water and thus caxisesforward to aft. the ship to advance. The propeller, therefore, which could do July 19, 1917. SHIPBUILDING AND SHIPPING RECORD. 57 this w-ith the minimum of shp was reckoned to have reached the in a sternward direction. Or, as Baker puts it, A screw propellermaximum efficiency. Negative slip was considered a great achieve- is a means of pusliing a ship forward by thrust

. Handbook of construction plant, its cost and efficiency. Fig. 286. Little Giant High Crane Steam Shovel, 35 Tons, 1/4 CubicYard Dipper. SHOVELS. Fig. 287. No. 1 Revolving Shovel Excavating Cellars. ; R 1 ? . V I j ...ffty ^ jfe Fig. 288. 598 HANDBOOK OF CONSTRUCTION PLANT was also driven by this motor. The swinging machinery wasgeared to a 50 hp. motor, and the thrust motor was also 50-hp.The compressor which furnished air to the hoisting drum brake,the emergency brake on the swing motor, and the friction clutchand brake on the intermediate shaft were driven by a 2-hp. con-stant speed indu Stock Photo

RM2AG4RC7–. Handbook of construction plant, its cost and efficiency. Fig. 286. Little Giant High Crane Steam Shovel, 35 Tons, 1/4 CubicYard Dipper. SHOVELS. Fig. 287. No. 1 Revolving Shovel Excavating Cellars. ; R 1 ? . V I j ...ffty ^ jfe Fig. 288. 598 HANDBOOK OF CONSTRUCTION PLANT was also driven by this motor. The swinging machinery wasgeared to a 50 hp. motor, and the thrust motor was also 50-hp.The compressor which furnished air to the hoisting drum brake,the emergency brake on the swing motor, and the friction clutchand brake on the intermediate shaft were driven by a 2-hp. con-stant speed indu

Electrical news and engineering . unit will be capable of operating continuouslyat 49,500 Ic^.a., with either voltage or current 10 per centin excess of the rated value. At 80 per cent power factor theover-all efficiency of the generators will be slightly in excessof 97 per cent. The thrust bearing is designed to support a load of1,000.000 lbs. This is slightly in excess of the weight of delta to Y to give 110,000 to 132,000 volts, at rated load.These are of the shell type, and individually rated at 15.000kv.a.. 25 cycle, 12.000/63.500/75,000. They are guaranteed98.2 per cent efficient at 80 p Stock Photo

RM2AN4FY7–Electrical news and engineering . unit will be capable of operating continuouslyat 49,500 Ic^.a., with either voltage or current 10 per centin excess of the rated value. At 80 per cent power factor theover-all efficiency of the generators will be slightly in excessof 97 per cent. The thrust bearing is designed to support a load of1,000.000 lbs. This is slightly in excess of the weight of delta to Y to give 110,000 to 132,000 volts, at rated load.These are of the shell type, and individually rated at 15.000kv.a.. 25 cycle, 12.000/63.500/75,000. They are guaranteed98.2 per cent efficient at 80 p

. The Street railway journal . ions is very simple, being composed of very fewparts. It is very light and the feed nut is mounted on ball bear-ings to reduce the friction of the thrust. New Type of Electric Heater The Safety Car Heating & Lighting Company has recently de-veloped and placed upon the market a new type of electric heater- for street cars. The manufacturers think they have succeeded inproducing a heater which is compact, strong and durable, de-signed to stand the wear and tear of service, and which has anunusual efficiency due to the freedom of air circulation throughand around th Stock Photo

RM2CGXBR5–. The Street railway journal . ions is very simple, being composed of very fewparts. It is very light and the feed nut is mounted on ball bear-ings to reduce the friction of the thrust. New Type of Electric Heater The Safety Car Heating & Lighting Company has recently de-veloped and placed upon the market a new type of electric heater- for street cars. The manufacturers think they have succeeded inproducing a heater which is compact, strong and durable, de-signed to stand the wear and tear of service, and which has anunusual efficiency due to the freedom of air circulation throughand around th

. Applied thermodynamics for engineers. of the bucket), or we may choose such anangle that the end thrust components de and ea^ Fig. 250, shall bal- VELOCITY EFFICIENCY 375 ance. In marine service, some end thrust is advantageous ; instationary work, an effort is made to eliminate it. This would beaccomplished by making the entrance and exit bucket angles equal,for a zero retardation by friction. With friction considered, theangle of exit K^ in Fig. 251, must be greater than the entering an-gle e. In any case, where end thrust is to be eliminated, the rota-tive component of the absolute exit v Stock Photo

RM2CEKN2H–. Applied thermodynamics for engineers. of the bucket), or we may choose such anangle that the end thrust components de and ea^ Fig. 250, shall bal- VELOCITY EFFICIENCY 375 ance. In marine service, some end thrust is advantageous ; instationary work, an effort is made to eliminate it. This would beaccomplished by making the entrance and exit bucket angles equal,for a zero retardation by friction. With friction considered, theangle of exit K^ in Fig. 251, must be greater than the entering an-gle e. In any case, where end thrust is to be eliminated, the rota-tive component of the absolute exit v

. Railway mechanical engineer . nexceeds the maximum possible wheel-rail friction, or adhesion.that is, if the pull of the brake shoes tending to lock thewheels is a greater force than the pull of the rail, whichtends to keep the wheels turning, the wheels, of course, willslide. Figs. 1 and 2 portray the relation between adhesion,braking ratio and efficiency factor in this balance of forces.By adhesicn is understood the limiting value of adhesion between wheel and rail Ijeyond which more thrust or resist-ance cannot be given by the rail. The limiting value foradhesion will depend on the condit Stock Photo

RM2CNHTR7–. Railway mechanical engineer . nexceeds the maximum possible wheel-rail friction, or adhesion.that is, if the pull of the brake shoes tending to lock thewheels is a greater force than the pull of the rail, whichtends to keep the wheels turning, the wheels, of course, willslide. Figs. 1 and 2 portray the relation between adhesion,braking ratio and efficiency factor in this balance of forces.By adhesicn is understood the limiting value of adhesion between wheel and rail Ijeyond which more thrust or resist-ance cannot be given by the rail. The limiting value foradhesion will depend on the condit

. The railroad and engineering journal . with a forward thrust andhold-off catch. The magnet limbs are exceedingly maSsive, each limb with its pole piece being over four tons,and the yoke of the machine weighs about three tons. Themachines can be run either as shunt or compound as re-quired. The total weight of copper wire on the mag-net of each machine is nearly 3,300 lbs. The presentmachines have an electrical efficiency of slightly over96 per cent., and the commercial efficiency of the engineand dynamo —i.e., ratio ot the electric power available out-side the dynamo to the indicated H. P. o Stock Photo

RM2CH37A3–. The railroad and engineering journal . with a forward thrust andhold-off catch. The magnet limbs are exceedingly maSsive, each limb with its pole piece being over four tons,and the yoke of the machine weighs about three tons. Themachines can be run either as shunt or compound as re-quired. The total weight of copper wire on the mag-net of each machine is nearly 3,300 lbs. The presentmachines have an electrical efficiency of slightly over96 per cent., and the commercial efficiency of the engineand dynamo —i.e., ratio ot the electric power available out-side the dynamo to the indicated H. P. o

. Florists' review [microform]. Floriculture. »TrirrT'"*r7^ 126 The Florists'Review August 21. 1913. THE "IDEAL" HOT WATER CIRCULATOR The most perfect device In the world for Increasing the circulation In hot water heating systems. Saves from 25% to 40% in fuel THRUST BAU. BEARINSS. Exceptionally low cost of operation Sectional Cut of Improved Circulator No. 6. An "IDEAL" Circulator properly installed will increase to perfection the circulation in ANY hot water heating system and bring it up to the highest possible efficiency. Write now for illustrated booklet. A. E. G Stock Photo

RMRRTFPN–. Florists' review [microform]. Floriculture. »TrirrT'"*r7^ 126 The Florists'Review August 21. 1913. THE "IDEAL" HOT WATER CIRCULATOR The most perfect device In the world for Increasing the circulation In hot water heating systems. Saves from 25% to 40% in fuel THRUST BAU. BEARINSS. Exceptionally low cost of operation Sectional Cut of Improved Circulator No. 6. An "IDEAL" Circulator properly installed will increase to perfection the circulation in ANY hot water heating system and bring it up to the highest possible efficiency. Write now for illustrated booklet. A. E. G

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