HOVERCRAFT
1. INRODUCTION
Vehicles designed to travel close to but above ground or water. These vehicles are supported in various ways. Some of them have a specially designed wing that will lift them just off the surface over which they travel when they have reached a sufficient horizontal speed (the ground effect). Hovercrafts are usually supported by fans that force air down under the vehicle to create lift, Air propellers, water propellers, or water jets usually provide forward propulsion. Air-cushion vehicles can att ....etc

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Abstract :
A hovercraft or air-cushion vehicle (ACV) is a craft, designed to travel over any smooth surface supported by a cushion of slow moving, high-pressure air, ejected downwards against the surface below, and contained within a skirt. Because they are supported by a cushion of air, hovercraft are unique among all forms of ground transportation in their ability to travel equally well over land, ice, and water.
The main parts of a hovercraft are:
Skirt Hull
Lift Fan Thurst Fan
Basic Design:
The lifting motion is control ....etc

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HOVERCRAFT





INTRODUCTION

A hovercraft is a vehicle capable of traveling over most surfaces on a cushion of air trapped under the body for lift. Air propellers, water propellers, or water jets usually provide forward propulsion. Air-cushion vehicles can attain higher speeds than can either ships or most land vehicles due to lower frictional forces and use much less power than helicopters of the same weight. Figure 1 below illustrates th ....etc

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85/2014
Maximum : 100 marks
Time : 1 hour and 15 minutes

1. V belt run in-------------------degree v-groove.
(A)60°
(B)55°
(C )29°
(D)40°

2. The -----------------is the operation of forming the edges of a component into roll by bending the sheet metal in order to strengthen the edges and to provide smoothness to its surface :
(A)Bending
(B)Curling
(C )Lancing
(D)Forming

The back gear system of a lathe is used to :
(A)Reduce the spindle speed
(B)Increase the spindle speed
(C )Only used in thread cut ....etc

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