this is a very useful altimeter ..... a Bourgeois - Engineering Chevallier .... Rue des Pyramides, Paris ....
1910 modelstreet level 0 is 770 mm of mercury per normal and go;the needle turns upside down? this is normal since altitude barometric pressure drop!you want to install:
http://pagesperso-orange.fr/bleriot11/New_PANEL_with_altimeter.zip
1910 modelstreet level 0 is 770 mm of mercury per normal and go;the needle turns upside down? this is normal since altitude barometric pressure drop!you want to install:
http://pagesperso-orange.fr/bleriot11/New_PANEL_with_altimeter.zip