Link: - Frontpage

'Blueprint' categories:

Selecting WW2 Airplanes/Vickers/Vickers 432 (England) (1942) yields:

Image source: The Blueprints

Terms: Sign up to The Blueprints is free.

Full terms of use: Link: - Terms of Use

They currently have 43.675 Blueprints online divided into categories [as shown in the first image above] Each one of these categories broken down into sub-categories (or even sub-sub categories)

Vector drawings can be requested/downloaded at a cost.

An example of the quality you can expect from the downloaded vector drawings:

Link: Ford Tourneo Connect LWB (2009)