What is the difference between FIRST ANGLE AND THIRD ANGEL DRAWING

 We are sometimes little confused that First angel and Third angel but both are different each and others, it’s must important to define to engineering drawing. Lest see on below diagram.There are many type of difference between first angel and third angel drawing Example of first angel drawing:

 

 

 Unfolded it gives the correct layout.

	1st Angle Projection 3rd Angle Projection In First Angle projection the view is projected through the component, so the front view is projected onto the back wall and the top view is projected onto the base. In 3rd Angle projection the side facing the cube is projected onto the cube, so the top view is on the top of the box and the front view is on the front of the box.
	When the 1st Angle view is folded out the front view is at the back of the top view and the side view is on the opposite side of the front view. This type of layout often causes confusion with people who aren't completely familiar with orthographic layouts. In 3rd angle projection the views are positioned on the same side of the view next to them, so the top view is on top of the front view and the side view is on the side of the front view that it represents. This is a much easier layout to understand and my preferred choice.

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what is explain first angel and third angel Projection

Engineering Drawing:

An Engineering Drawing is a type of technical drawing, used to fully and clearly define requirements for engineered items, and is usually created in accordance with standardized conventions for layout. 

First Angle Projection:

1) The object is kept in the first quadrant.
2) The object lies between the observer and the plane of projection.
3) In this method, when the views are drawn in their relative positions, planed comes below the elevation.





Third Angle Projection:

1) The object is assumed to be kept in the third quadrant.
2) The Plane of Projection lies between the Observer and the Object.
3) In this method, when the views are drawn in their relative positions, the plan, comes above the elevation.
This example of third angel projection 

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First Angle Projection :

>>> The object is located above HP(Horizontal Plane) and in front of VP(Vertical Plane).

>>> The object is in between Plane of Projection(POP) and Observer.

>>> In case of First angle Projection left hand side view is seen on the right hand side and the right hand side view is visible on the left hand side.

Third Angle Projection :

>>> The object is located below the Vertical Plane and behind the Horizontal Plane.

>>> The Plane of Projection in between Object and the Observer.

>>> But in case of Third angle Projection left hand side view is seen on the left hand side and the right hand side view is visible on the right hand side.It will be opposite of First angle Projection.

An Engineering Drawing is a type of technical drawing, used to fully and clearly define requirements for engineered items, and is usually created in accordance with standardized conventions for layout. 

First Angle Projection:

1) The object is kept in the first quadrant.
2) The object lies between the observer and the plane of projection.
3) In this method, when the views are drawn in their relative positions, planed comes below the elevation.




Third Angle Projection:

1) The object is assumed to be kept in the third quadrant.
2) The Plane of Projection lies between the Observer and the Object.
3) In this method, when the views are drawn in their relative positions, the plan, comes above the elevation.

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Re: What is Engineering drawing and explain first angle and third angle projection?

First Angle Projection :

>>> The object is located above HP(Horizontal Plane) and in front of VP(Vertical Plane).

>>> The object is in between Plane of Projection(POP) and Observer.

>>> In case of First angle Projection left hand side view is seen on the right hand side and the right hand side view is visible on the left hand side.

Third Angle Projection :

>>> The object is located below the Vertical Plane and behind the Horizontal Plane.

>>> The Plane of Projection in between Object and the Observer.

>>> But in case of Third angle Projection left hand side view is seen on the left hand side and the right hand side view is visible on the right hand side.It will be opposite of First angle Projection.

An Engineering Drawing is a type of technical drawing, used to fully and clearly define requirements for engineered items, and is usually created in accordance with standardized conventions for layout. 

First Angle Projection:

1) The object is kept in the first quadrant.
2) The object lies between the observer and the plane of projection.
3) In this method, when the views are drawn in their relative positions, planed comes below the elevation.




Third Angle Projection:

1) The object is assumed to be kept in the third quadrant.
2) The Plane of Projection lies between the Observer and the Object.
3) In this method, when the views are drawn in their relative positions, the plan, comes above the elevation.

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