How many types of aeroplanes are there in the world?

There are several types of airplanes, depending on the basis on which you classify them. Recently, it was said that there about thirty-nine thousand airplanes in the world, excluding the light aircraft. Records also reveal that there have been over fifteen thousand airplanes in the world since the inception of airplanes manufacturing and usage. Airplanes vary from commercial airplanes to private jets, propeller planes, military planes, and more.

The commercial planes include the jumbo passenger jets, light passenger jets, cargo airplanes, mid-sized passenger jets, passenger turboprops, and more. The types of private jets include Very Light Jets (VLJ), mid-sized business jets, military jets, light business jets, heavy business jets, and few more. The propeller planes types include the military turboprops, aerobatic, private single-engine, amphibious, twin turboprops, and others. Airplanes can also be classified by considering their weights. There are some planes that are lighter than air, while others are heavier than air.

Your question, if I answer it for the current year or even two is surprisingly difficult to research! You can get a list on Wikipedia, a source I rarely use since it is vulnerable to insertion of inaccurate information.

Basically, airplanes can be categorized by their configurations. One measure is the number of wings. The styles include monoplanes, with single wings on either side of the fuselage; biplanes, with two wings, one atop the other; A tandem-wing craft has two wings, one placed forward of the other.

There's also the wing planform - the shape when seen from above. wing planform is the shape it forms when seen from above. Delta wings are are the shape of the Greek letter delta - triangular wings roughly a right angles to the fuselage. Concorde featured delta wings. Some research aircraft have swept wings which are angled, usually to the rear. at about 35°.