WW1 Aircraft and sirens?

[Graham]

In Ernst Junger's book 'Storm of Steel' he mentions British aircraft using sound signals to communicate with the British on the ground such as artillery batteries, does anyone know more about this form of signalling?

Thanks, Graham

[fv1609]

Graham this was covered here:

 

http://1914-1918.invisionzone.com/forums/index.php?showtopic=163818&hl=communicating&do=findComment&comment=1592487

 

I don't know if klaxons were standard fittings on aircraft. I have a 1921 publication on martial law in India that requires that the klaxon is sounded before an illegal gathering can be machine-gunned.

[Graham]

Thank you for your very helpful reply - and so quick too. As usual with this so called 'simple' questions - it uncovers a much more complex and interesting answer.

Thanks again, Graham