Hovercraft
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A hovercraft operates by using a lift motor to create higher pressure inside the hull than the surrounding atmospheric pressure, which generates lift. This reduces friction between the hull and the surface below, allowing forward motion with only a small amount of thrust provided by a separate thrust motor. Key components include the flexible skirt around the hull edge to guide the air cushion, and directional control systems like rudders controlled by servo motors. Hovercrafts can be used for transportation or military purposes by distributing weight evenly and controlling dynamics through principles of lift, thrust, torque and efficiency.
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Hovercrafts
The document discusses hovercrafts, including their history, design, operation, and applications. Some key points:
- Hovercrafts were first conceptualized in the 1870s but were pioneered in the 1950s by Christopher Cockerell, who patented the design.
- They work by blowing air under the hull with lift fans to create an air cushion that allows movement over land and water. Flexible skirts around the edges contain the air.
- In addition to passenger ferry services, hovercrafts see military uses like mine countermeasures and transport. Future applications may include hover trains and cars.
Hover Craft
Semester Project: Design and Fabrication of Hovercraft
@University of Engineering and Technology Lahore City Campus
Hovercraft presentation-The Future is Now!
Hovercrafts provide an amphibious mode of transportation that can move equally on land and water surfaces. They work by using lifted air to create a cushion that allows the craft to hover above the ground or water. Key elements include a lifting fan to pressurize air under the craft, flexible skirts around the edges to contain the air, and propulsion fans at the rear. While early conceptual designs date back to the 18th century, hovercrafts were first realized in the 1950s. They have since found uses in passenger transportation, military operations, and recreational activities due to their ability to traverse varied terrain with minimal environmental impact.
Hovercrafts
A hovercraft is an amphibious vehicle that can move equally on land and water. It was invented in 1952 by Christopher Cockerell, an English engineer. Hovercrafts have a hull to carry passengers and cargo, a lift and thrust system using propellers to provide air underneath and move the craft forward, and a flexible skirt around the bottom to contain the pressurized air. They can be used for personal transportation, search and rescue missions, and mass transit across terrain that other vehicles cannot navigate.
Development of a Integrated Air Cushioned Vehicle (Hovercraft)
1) The document describes the development of an integrated air cushion vehicle (hovercraft) prototype. It details the design of major components like the hull, skirt, air box, engine assembly, and integrated lift and thrust system using one propeller.
2) Calculations are shown for determining the required air volume, pressures, and component sizes based on the hovercraft's weight and dimensions. A suitable impeller is selected to provide the needed airflow and pressure.
3) Fabrication of the prototype from materials like plywood, polystyrene, and aluminum is described. Testing showed the hovercraft could lift and propel itself carrying 75kg at 70mm above the surface at near 20km/hr.
HOVERCRAFT PRESENTETION
This document summarizes a seminar presentation on hovercrafts. It includes:
- An introduction to hovercrafts, describing them as vehicles that can fly, float, and drive over surfaces like grass, mud, sand, water and ice.
- A brief history of hovercraft development, noting early designs in the 1700s and the inventor who successfully built the first hovercraft in the 1960s.
- Descriptions of the basic components of hovercrafts, including lifting fans, thrust propellers, flexible skirts, engines, and rudders.
- An explanation of how hovercrafts work based on lift and propulsion principles using air pressure under the flexible skirt.
A Study about HOVERCRAFT
This document summarizes a study about hovercraft design. It discusses the key components of a hovercraft including the lift fan, thrust propellers, momentum curtain, skirt, air box, and rudders. It provides details on hovercraft operation, including how lift and thrust are generated. Calculations are shown for determining the necessary lift forces, power requirements, and thrust forces. The results demonstrated the hovercraft's ability to hover with over 300 pounds of payload. In conclusion, hovercraft require careful design to overcome challenges while allowing for low friction movement over various surfaces.
How Helicopter work
INTRODUCTION:
While a helicopter is a far more complex machine than an aeroplane, the fundamental principles of flight are the same.
The rotor blades of a helicopter are identical to the wings of an aeroplane –when air is blown over them, lift is produced.
The crucial difference is that the flow of air is produced by rotating the wings – or rotor blades – rather than by moving the whole aircraft.
When the rotor blades start to spin, the air flowing over them produces lift, and this can cause the helicopter to rise into the air.
So, the engine is used to turn the blades, and the turning blades produce the required lift.
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Hovercrafts
The document discusses hovercrafts, including their history, design, operation, and applications. Some key points:
- Hovercrafts were first conceptualized in the 1870s but were pioneered in the 1950s by Christopher Cockerell, who patented the design.
- They work by blowing air under the hull with lift fans to create an air cushion that allows movement over land and water. Flexible skirts around the edges contain the air.
- In addition to passenger ferry services, hovercrafts see military uses like mine countermeasures and transport. Future applications may include hover trains and cars.
Hover Craft
Semester Project: Design and Fabrication of Hovercraft
@University of Engineering and Technology Lahore City Campus
Hovercraft presentation-The Future is Now!
Hovercrafts provide an amphibious mode of transportation that can move equally on land and water surfaces. They work by using lifted air to create a cushion that allows the craft to hover above the ground or water. Key elements include a lifting fan to pressurize air under the craft, flexible skirts around the edges to contain the air, and propulsion fans at the rear. While early conceptual designs date back to the 18th century, hovercrafts were first realized in the 1950s. They have since found uses in passenger transportation, military operations, and recreational activities due to their ability to traverse varied terrain with minimal environmental impact.
Hovercrafts
A hovercraft is an amphibious vehicle that can move equally on land and water. It was invented in 1952 by Christopher Cockerell, an English engineer. Hovercrafts have a hull to carry passengers and cargo, a lift and thrust system using propellers to provide air underneath and move the craft forward, and a flexible skirt around the bottom to contain the pressurized air. They can be used for personal transportation, search and rescue missions, and mass transit across terrain that other vehicles cannot navigate.
Development of a Integrated Air Cushioned Vehicle (Hovercraft)
1) The document describes the development of an integrated air cushion vehicle (hovercraft) prototype. It details the design of major components like the hull, skirt, air box, engine assembly, and integrated lift and thrust system using one propeller.
2) Calculations are shown for determining the required air volume, pressures, and component sizes based on the hovercraft's weight and dimensions. A suitable impeller is selected to provide the needed airflow and pressure.
3) Fabrication of the prototype from materials like plywood, polystyrene, and aluminum is described. Testing showed the hovercraft could lift and propel itself carrying 75kg at 70mm above the surface at near 20km/hr.
HOVERCRAFT PRESENTETION
This document summarizes a seminar presentation on hovercrafts. It includes:
- An introduction to hovercrafts, describing them as vehicles that can fly, float, and drive over surfaces like grass, mud, sand, water and ice.
- A brief history of hovercraft development, noting early designs in the 1700s and the inventor who successfully built the first hovercraft in the 1960s.
- Descriptions of the basic components of hovercrafts, including lifting fans, thrust propellers, flexible skirts, engines, and rudders.
- An explanation of how hovercrafts work based on lift and propulsion principles using air pressure under the flexible skirt.
A Study about HOVERCRAFT
This document summarizes a study about hovercraft design. It discusses the key components of a hovercraft including the lift fan, thrust propellers, momentum curtain, skirt, air box, and rudders. It provides details on hovercraft operation, including how lift and thrust are generated. Calculations are shown for determining the necessary lift forces, power requirements, and thrust forces. The results demonstrated the hovercraft's ability to hover with over 300 pounds of payload. In conclusion, hovercraft require careful design to overcome challenges while allowing for low friction movement over various surfaces.
How Helicopter work
INTRODUCTION:
While a helicopter is a far more complex machine than an aeroplane, the fundamental principles of flight are the same.
The rotor blades of a helicopter are identical to the wings of an aeroplane –when air is blown over them, lift is produced.
The crucial difference is that the flow of air is produced by rotating the wings – or rotor blades – rather than by moving the whole aircraft.
When the rotor blades start to spin, the air flowing over them produces lift, and this can cause the helicopter to rise into the air.
So, the engine is used to turn the blades, and the turning blades produce the required lift.
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Helicopter emergency procedures
Autorotation is an emergency procedure where the engine is disengaged from the main rotor to allow the rotor blades to continue turning via the upward airflow. During autorotation, the pilot lowers the collective to reduce lift and drag, causing the helicopter to descend and maintain airflow and rpm. Kinetic and potential energy are used to arrest the descent rate and ensure a soft landing. Autorotation procedures and airspeeds vary between helicopter models and are outlined in their manuals.
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The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
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Supercharger in automobile
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Mainly super charging is done to induct more amount of air into cylinder per unit times and hence to burn more amount of fuel to increase power output. Following are the objectives of supercharging
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57686735 propulsion-14-1
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Ijmet 06 10_017
The document discusses air breathing jet engines and breaking the sound barrier. It provides details on the components and working of jet engines, including the inlet, compressor, combustion chamber, turbine, and nozzle. It also discusses jet engine performance factors like thrust. The key objectives are to increase jet engine performance/efficiency and study the materials used to withstand high temperatures and pressures. Hypersonic speed above Mach 5 is seen as important for the 6th generation of fighter aircraft using scramjet engines.
Seminar report on air driven engine
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Ch07
After studying the chapter, readers should be able to explain the differences between turbochargers and superchargers, describe how boost levels are controlled, and discuss maintenance procedures. The document then provides details on how turbochargers and superchargers work, including describing the components, how boost is generated and controlled, and potential failure points.
LIBRO DE FAA.pdf
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vertical tail design.
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Nasa
Nearly 30% of fatal light aircraft accidents are caused by stalling and spinning at low altitudes before the spin fully develops, according to grim statistics. NASA has proposed a safe wing design to prevent such accidents caused by poor wing designs. The design includes wing slots, washout at the wing tips to reduce tip angles, greater camber at the tips, and drooped ailerons ahead of the wing to delay stalling and allow use of the ailerons to recover from spins.
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The document discusses several key factors in landing gear design:
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3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
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留信网认证的作用:
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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Hovercraft
- 1. HOVERCRAFT
- 2. Basic Principle Has a hull. Inside that lift motor provides pressure greater than atmospheric pressure. Because of the pressure difference it lifts. Friction gets reduce between ground and contacting surface. At this friction even a small thrust is enough for forward motion. Has a motor for providing thrust. Has a mechanism to changing direction of motion.
- 3. uses Mode of transport. Military purpose.
- 4. How it works
- 5. HOVERING Lift motor exerts pressure greater than atm pressure. Due to pressure difference body of hovercraft floats. This reduces friction and makes it easier for motion.
- 6. Importance of Skirt It guides the air pushed by hovering motor to form a air cushion. Must be flexible, untearable. Conical mount distributes air into skirt.
- 7. THRUST Provided by a thrust motor and a propeller. Propeller has twisted blade and cuts the air perpendicular to its axis of rotation. And forcefully pushes the air into one direction. By newton’s third law body moves in other direction.
- 8. Centre Of Gravity CG must be approximately known. Knowledge of cg provides to cop up with toppling, spinning,turning problems. Helps to distribute the weight for maintaining the smooth motion.
- 9. Direction changing mechanism Thrust would be unidirectional. two rudder mechanism, Concentrator pipe mechanism. Two prop mechanism.
- 10. DRAG It must be reduced for smooth motion of hovercraft. Extra assembled parts like servo motors, motor mount batteries, rudder stabiliser etc increases drag. Aerodynamic shape of the model reduces drag.
- 11. Dynamics equations 1. Lift force = pressure diff. created by the motor x base hull area. 2.Newton’s third law used in thrust. F1= -F2 3.Torque principal used in the rudder to controlled motion. T= length of the servo arm x Force 4. Efficiency increases due to decrease in friction force. efficiency=output power/input power
- 12. PARTS
- 13. BODY/HULL Made up of card board and 4x sheet. Aerodynamically shaped. Can sustain generated thrust by hovering. Conical mount distribute air into hull.
- 14. Motors Hovering motor and thrust motor-BLDC Motors. Peripheral 4x sheet cover into hovering motor to prevent air leakage. Servo motor for giving torque to rudder. Motor Mount Provides safety to thrust motor in case of toppling and other damages. Made up of cardboard.
- 15. Thrust concentrator Pipe acts as nozzle. Pushes air into backward direction forcefully. Due to reaction of that body moves in forward direction. Its movement is given by servo motors.
- 16. SKIRT Used material of an umbrella. Must be flexible. Must be untearable.
- 17. Radio-Controller
- 18. 3- cell Li-Po battery
- 19. Servo tester
- 20. Receiver
- 21. Thank you! Submitted by- R. Deekshit reddy Prashant maida V. Anirudh Trilochan kumbhkar