Welcome to the Forum! I hope you will find us a very helpful group of enthusiasts.
The most famous "ritual" carried out by a WWI pilot to commemorate his victories was, of course, the ordering of small silver 'victory cups' by Manfred von Richthofen
- one for each victory (through his 60th victory, when he abandoned this practice because silver was becoming too scarce). Each cup was inscribed with the number, date and type of victory. Many on this forum have considered this a macabre or gruesome act by MvR, but it was fairly typical within German military tradition. A few other German pilots did similar things.
On the Allied side, Raoul Lufbery
of the Lafayette Escadrille "used to paint, smiling broadly, a tiny red bar on one of the struts of his plane to indicate a new victory" - according to his commander, Capt. Thenault. Canadian ace William "Billy" Barker similarly painted small white stripes on the interplane struts of his Sopwith Camel for each victory.
Also, in Lufbery's Lafayette Escadrille, N.124, there was a tradition that started with the unit's first victory by Kiffin Rockwell. Kiffin's brother Paul brought a bottle of 80-year-old Bourbon whiskey to the unit, and Kiffin drank the first 'shot' from the bottle. It was then proposed that each pilot would be entitled to one drink from what came to be known as the "Bottle of Death" for each victory.
Whenever Georges Guynemer
returned to his airfield following a victory, he would buzz the field and open and close the throttle of his engine to produce a sound that resembled 'J'en ai en'
or 'I got one of them' -according to historian Jon Guttman.
did something similar when he would score a victory in his rotary-engined Fokker Eindecker."We always heard Wintgens signalling with his rotary engine - brr,brr,brr - the sign that another one was down," said Wintgens' close friend Hans-Joachim Buddecke
In addition, there were a number of examples - especially in the American Air Service - of pilots painting small victory markings on their airplanes in one fashion or another.
I hope that is of interest.