1959-61 Gran Prix car cutaways drawn by Bob Thatcher in R&T, May and June 1961,

1955 Ferrari 555 Super Squalo

1959 BRM

In May and June, 1961, Road and Track published a series of cutaways of 2.5-liter Formula One cars by a talented artist named Bob Thatcher.

1959 Cooper Climax

1960 Reventlow Scarab

1958 Ferrari Dino

1959 Aston Martin

Read about them at https://simanaitissays.com/2017/03/07/grand-prix-cutaways-the-2-5-liter-era-part-2/
For more see https://simanaitissays.com/2017/03/06/grand-prix-cutaways-the-2-5-liter-era/