Page 731 - PPL-engelsk 2025

Aircraft general knowledge

8.9.1 Carburetor construction

Below and on the following pages you will get an overview of a simple version of

a carburetor.

We will slowly construct the carburetor and expand it so that it meets the

requirements that are now placed on such a one.

• The engine draws air in

through the venturi

• Static pressure drops in the

venturi.
• Gasoline is forced out into the

nozzle and atomized and

vaporized.

• The engine runs at full throttle

until there is no more

gasoline, and then the show is over, so...

To avoid a lack of gasoline in the carburetor, the system must be expanded.

• A float solves the problem.

• In order to be able to regulate

the speed, we install a

throttle.

• The main distributor is

equipped with a small

nozzle.

• There is a little lack of power,

and there are problems with idling

Not quite so good yet. An air duct for the main distributor is necessary to get a

better spread of the gasoline.

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 731