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Wednesday, July 3, 2013



RADIO CONTROLLED AIRCRAFT Presentation Transcript:

A radio controlled aircraft (model) is controlled remotely by a hand held transmitter & receiver within the aircraft.
The receiver controls the corresponding servos that moves the control surfaces based on the position of joystick on the transmitter, which in turn affect the orientation of the plane.


Essentially there are four aerodynamic forces that act on an airplane in flight; these are lift, drag, thrust & weight.
In simple words,
 Drag- it is the resistance of air molecules hitting the airplanes ( the backward force).
Thrust- it is the power of airplane’s engine( the forward forces).
Lift is the upward forces & weight is the downward forces.
Thrust is generated by the airplane’s engine( propeller or jet), weight is created by the natural force on gravity upon the airplane & drag comes from friction as the plane moves through air molecules. Drag is also a reaction to the lift, & this lift must be generated by airplane in flight. This is done by the wings of the airplane.

First of all choose the material for the body-
1. Balsa wood –  soft and light,
                          easy to work on,
                           Available in strips,
                           most widely used in air modeling.
2. Thermocole / foam-
                        choose high density thermocole(HDT)
                        it should be very light     

6.Then we need propeller( fixed pitch or variable pitch). Generally variable pitch propeller are used for small motors or for reverse flying.

7.Next we need battery and servos. Functions of servos is to move surface of plane & also provide turning capabilities of plane.

RC airplane can be used as-
Weather survey
Defense or military services

Planes fly by the virtue of Bernoulli principle on their wings. Air being pushed under the wings only accounts for a small portion of the lift forces that make an airplane fly. The real forces results from the partial vaccum created above the wings (Bernoulli's principle).
To get the Bernoulli effect, the wings must expose a larger surfaces on top than below the wing.
Second we need to maintain a flow of air over and under the wings. This is the job of the engine, which pulls the plane & its wings forward, using a propeller.

10.The remote control, or RC, transmitter sends signals to a receiver on the airplane. Each transmitter has its own signal so that the signals from the planes don't interfere with each other. The receiver is attached to several control motors called servos, and a battery pack to provide power. The receiver sends signals to the servos based on the position of the transmitter stick. These signals tell each servo precisely what position to move to.
A cross section of a typical airplane wing will show the top surface to be more curved than the bottom surface. This shaped profile is called an 'airfoil' (or 'aerofoil') and the shape exists because it's long been proven (since the dawn of flight) that an airfoil generates significantly more lift than opposing drag i.e. it's very efficient at generating lift.

11.During flight air naturally flows over and beneath the wing and is deflected upwards over the top surface and downwards beneath the lower surface. Any difference in deflection causes a difference in air pressure.

12.AIRPLANE CONTROL SURFACESRC planes have several controls, each with a different surface. The rudder steers the plane, the ailerons cause it to bank left and right, the flaps increase and decrease lift, the elevators angle the nose up and down, and the motor controls the power. Each part is attached to the servo by a small control arm which moves the control as the servo turns.
To understand how each works upon the airplane, imagine 3 lines (axis- the blue dash line in picture) running through the plane. One runs through the centre of the fuselage from nose to tail  (longitudinal axis), one runs from side to side (lateral axis) and the other runs vertically (vertical axis). All 3 axis pass through the Centre of Gravity (CG), the airplane's crucial point of balance.

PowerPoint Presentation On RSRTC


RSRTC Presentation Transcript:

2.Introduction Of R.S.R.T.C.
RSRTC was established on 01st October 1964 and is the largest provider of intercity bus transportation in Rajasthan.  
RSRTC is currently transporting about 10.74 lack passengers daily and operating on routes connecting 32 districts of Rajasthan and neighboring states.   
The Network of R.S.R.T.C. is spread all over Rajasthan and other states providing all sorts of service to general public.
These services are provided by R.S.R.T.C. by its own fleet in which buses are purchased from various manufactures like TATA, ASHOK LEYLAND etc.
For any faults in buses, R.S.R.T.C. has established workshops in different cities like in Jaipur. If a bus has been damaged by an accident of a bus which has come from regular maintenance each and every part of it, from tyres to steering, propeller shaft to piston are inspected.                                                                       

Type of bus services:- There are various types of services offered by RSRTC. air-conditioned services.
2.Sleeper A/C coach.
3.Air conditioned(Pink line services).
4.super deluxe(silver line services).
5. Long distance express and night services (Blue line services).
6. Interstate services.
7. Ordinary services.
8. Mela services
9. CTS services
10.Sleeper non -A/C coach.

4.Body section:-
Body is the just like of the cover for the chassis & it is upper structure of Vehicle. In this section parts of buses are repaired and separated from it. The damaged parts are maintained again. The Glasses are replaced and tyres are retreated. The bends in the body are removed.
Body shell is made of following parts:-
1. Front Doors
2. Rear Doors
3. Front Frame, Cross Beam and Front wheel.
4. Right Side Panel with Fenders
5. Left side Panel with Fenders
6. Front Panels
7. Roof Panels
8. Rear Lower Panel

5.Chassis section:-
     Chassis section is the French term used to denote the frame or main structure of a vehicle. In Chassis section various assembly are disassembled and sent to their respective sections for repairing, after repairing have been carried out they are sent back to chassis section where they are again mounted on Chassis.

                                     Chassis is a vehicle without body. This term is used to describe the whole vehicle excluding body. Many components like engine and radiator , wheels and tyres , steering system , axles , controlling system like braking , suspension etc. are mounted on Chassis frame. In other words Cassis is sometime referred as “ BACK BONE “ of the vehicle.

6.Differential Assembly :- The differential assembly in a rear-wheel drive vehicle has three functions. The first, and most obvious, is to redirect the power flow to drive the rear wheels. The power flow must make a 90° turn between the drive shaft assembly and the rear wheels. This is accomplished in the differential assembly by the drive pinion and ring gears. The second function of the differential assembly is to multiply engine power, reducing speed at the output in the process. If there were no gear reduction (1:1 gear ratio), the vehicle would accelerate very slowly.                                                                                                                               

7.Minor Section:-
In minor section dissembling cleaning, checking repairing or replacement is done according to the need of pant. Thus this sector is very important for the proper functioning of buses. Minor Assembly Components are:-
1. Clutch and Pressure Plate:-A Clutch is a machine member used to connect the driving shaft to a driven shaft, so that the driven shaft may be started or stopped at will, without stopping the driving shaft. Clutches allow a high inertia load to be stated with a small power.
                                                                                               A clutch is a mechanical device that provides for the transmission of power (and therefore usually motion) from one component (the driving member) to another (the driven member) when engaged, but can be disengaged.

7.Pressure Plate:-
The pressure plate is an integral factor in the function of an automobile’s manual transmission. The pressure plate pushes the clutch disc, sometimes called the clutch plate, against the constantly spinning engine flywheel. The clutch disc, therefore, is either stationary or rotating at the same speed as the flywheel. Friction material, similar to that found on brake pads and brake drums, causes the clutch disc to spin at the same speed as the engine flywheel. It is this friction between clutch disc and flywheel that allows the engine torque to drive the wheels

8.Dismantle Section:-
In this section dismantling of Chassis parts and engine is done. After this damaged parts are sent to different section related to them for inspection, cleaning, repairing and replacement of broken parts.

9.Radiator Section :-
Radiator is a device for having a large amount of cooling surface and facilitate to pass large amount of air through it, so that the water circulating through its tubes cooled efficiently.
In R.S.R.T.C. buses radiator are made up of aluminum because of its good heat conductivity, lightness, cheapness and easy of making and repairing.

10. Washing Section :-
In this section washing of R.S.R.T.C. buses is done by an automatic washing system. Side brushes wash front, sides and rear of the bus. The rotating brushes are freely suspended and move inward or outward according to the vehicle dimensions.

PowerPoint Presentation On PUMP MANUFACTURING


PUMP MANUFACTURING Presentation Transcript:


3.R K foundry works (p) limited : Its Established in year 1970 at Jaipur , Rajasthan India. R.K. Foundry Works private Limited , are one of the noted organization engaged in manufacturing , exporting and supply wide range of Industrial Hydraulic Crimping tool. Pump Iron handicrafts and electrical accessories.

4.SHRI ASHUTOSH BHARGAVA SHRI B N BHARGAVA : He used to say “NEVER SAY WE HAVE MADE THE BEST PRODUCT, WE CAN ALWAYS IMPROVE OUR PRODUCT AND MAKE THEM BETTER “) SHRI R N BHARGAVA : He specialized in (a) Energy efficient operation of cupola furnace (b) Improvement of surface finish of casting

5.INTRODUCTION of PUMP : A Hydraulic machine which convert the mechanical energy into hydraulic energy is called pump “ Important notes ………. * A pump does not create pressure it only provides flow * Pump can pump only liquid not vapour * Pump create flow by reducing atmospheric atmospheric pressure on water

6.Centrifugal Pump : “ If the mechanical energy converted into hydraulic energy by means of Centrifugal force acting on liquid .. The pump is know as Centrifugal Pump “ Main parts of centrifugal pump :. Impeller Casing Suction pipe Delivery pipe

7.Impeller : The rotating part of pump is called impeller. It consist of series of backward curved vane .it is mounted on motor shaft. Casing : The casing of a centrifugal pump is an air tight passage around the impeller and its function is to convert K.E. of fluid into pressure energy Suction pipe : It is the pipe connecting sump to impeller eye. DELIVERY PIPE : It is the pipe connecting the impeller eye to delivery destination.

8.CASTING : Its means pouring molten metal into a mold with a cavity of the shape to be made and allowing it to solidify when solidify the desired metal object is to taken out from the mould either by breaking the mold or taking the mold apart the solidified object is called the casting.

9.FOUNDRY : “Foundry or casting is the process of producing metal/alloy component parts of desired shapes by pouring the metal/ alloy into a prepared mould and then allowing the metal/alloy to cool and solidify. The solidified piece of metal/alloy is know as CASTING “

10. For more information, Please refer our PPT.
Thank You.




2.Principles of Motion Economy Developed over many years of practical experience in work design They are guidelines that can be used to help determine Work method Workplace layout Tools, and equipment Objective is to maximize efficiency and minimize worker fatigue

3.Three Categories of Principles The principles of motion economy can be organized into three categories: Principles that apply to the use of the human body Principles that apply to the workplace arrangement Principles that apply to the design of tooling and equipment

4.Use of Human Body The two hands should begin as well as complete their motion at the same time . The natural tendency of most people is to use their preferred hand (right hand for right-handed people and left hand for left-handed people) to accomplish most of the work. The other hand is relegated to a minor role, such as holding the object, while the preferred hand works on it. This first principle states that both hands should be used as equally as possible.

5.Use of Human Body The motions of the arms should be symmetrical and simultaneous and opposite in direction. This will help in balancing the body and there will be less stress on the workers body. Eg- carrying bucket of water in one hand.

6.In the first picture woman is carrying bucket in one hand and her body is imbalanced where as in the second picture woman is carrying weight equally in both the hands so more body balance.

7.The two hands should not be idle at the same time except during the rest period. The work method should be designed to avoid periods when neither hand is working. It may not be possible to completely balance the workload between the right and left hands, but it should be possible to avoid having both hands idle at the same time. The exception to this principle is during rest breaks.

8.Method should consist of smooth continuous curved motions rather than straight motions with sudden changes in direction It takes less time to move through a sequence of smooth continuous curved paths than through a sequence of straight paths that are opposite in direction, even though the actual total distance of the curved paths may be longer (since the shortest distance between two points is a straight line). The reason behind this principle is that the straight-line path sequence includes start and stop actions (accelerations and decelerations) that consume the worker’s time and energy.

9.Momentum should employed to assist the worker whenever possible, and it should be reduced to minimum if it has to be overcome by muscular effort. momentum, which can be defined as mass times velocity. The previous principle dealing with smooth continuous curved motions illustrates a beneficial use of momentum to make a task easier Eg- momentum is used during throwing the ball.

10. For more information, Please check our PPT. Thanks.
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