Indicateur de vitesse Etévé: As simple as this.

It was clear very soon, just after the first heavy-than-air “steps”, that the numerous stall accidents due to too low flying speed made obvious the necessity of some sort of speed indicator. The Frenchman Albert Etévé provided it in 1911. Etévé’s indicateur de vitesse was an utterly smart gadget. As we seen here, the principle is simplicity itself: it measures the wind pressure against a surface linked to a graduated spring. This anemometer was usually placed in the interplane strut, near the pilot’s field of view. Certainly not the most precise of instruments, but sure cheap and user-friendly. Due to those qualities the Etévé was employed well into the 1930’s on light aircrafts -This one belongs to a de Havilland DH.82 Tiger Moth.

Gimme the basics.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.