A delightful gear-head joke in Girl Genius

[osewalrus]

In today's Girl Genius, the engine on the flying machine bears a stylized "Wankel."
http://www.girlgeniusonline.com/comic.php#.WGZnQrYrLBI

Wankel is the name of a rotary powered cylinder engine that was hailed as a potentially revolutionary design, but problems

Comments

[thelongshot]

Course, Monty Python used it as something that sounds vaguely naughty.