A three-wheeler is a vehicle with three wheels. Some are motorized tricycles, which may be legally classed as either automobiles or motorcycles, while others are tricycles without a motor, some of which are human powered vehicles and animal powered vehicles.
Many three-wheelers which exist in the form of motorcycle-based machines are often called trikes and often have the front single wheel and mechanics similar to that of a motorcycle and the rear axle similar to that of a car. Often such vehicles are owner-constructed using a portion of a rear-engine, rear-drive Volkswagen Beetle in combination with a motorcycle front end. Other trikes include ATVs that are specially constructed for off road use.
Three-wheeled automobiles can have either one wheel at the back and two at the front, (for example: Morgan Motor Company) or one wheel at the front and two at the back (such as the Reliant Robin). Due to better safety when braking, an increasingly popular form is the front-steering "tadpole" or "reverse trike" sometimes with front drive but usually with rear drive. A variant on the 'one at the front' layout was the Scott Sociable, which resembled a four-wheeler with a front wheel missing.
See him shining red and gold, rocket boots to make him fly
To defend the innocents dedicates his life
Evil ones all around, till he crush 'em to the ground
An avenger made of steel, he's the Iron Man
[bridge]
He's invincible
Man-machine for war
[chorus]
Under the armor you know there's a man
His greatest weapon his brain
Fightin' with weapons he did by himself
No one can stand in his way
He can be invisible, he has got repulsor rays
Honorable, strong and brave, technologic knight
Without fear he always fights for the justice and the peace
Armored and dangerous, he's the Iron Man
[bridge]
[chorus]
See him shining red and gold, once again he flies around
He's in search of criminals, nowhere they can hide
Hearing his metallic voice, they will sweat and tremble with fear
Knowing they cannot escape from the Iron Man
[bridge]