AstroBidules

Welcome to Wikimedia Commons, AstroBidules!

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-- Wikimedia Commons Welcome (talk) 13:41, 28 October 2017 (UTC)

FP Promotion

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/FPCBot (talk) 05:03, 26 June 2018 (UTC)

Merci pour ce magnifique éclaté et panneaux de stabilisation

Merci, cher AstroBidules pour ce magnifique éclaté https://commons.wikimedia.org/wiki/File:%C3%89clat%C3%A9_fus%C3%A9e_et_vaisseau_Soyouz.svg que je cite à propos des panneaux de stabilisation dans l'article https://fr.wikipedia.org/wiki/Stabilit%C3%A9_(a%C3%A9ronautique).

Un petit problème : La dénomination française "Grille de stabilisation déployable etc." fait cependant naître un ambiguïté qui rejoint, malheureusement une idée fausse sur le fonctionnement de ces panneaux : Le mot grille, en effet laisse penser à un entrelacement normal de fils (un filet). C'est d'ailleurs ce qui est dessiné.

Or ces panneaux sont constitués de cellules cubiques ouvertes sur deux faces opposées (ouvertes dans le sens de la marche, une fois les panneaux déployés). Et ces cellules, dans lequel passe l'écoulement d'air, génèrent bien une portance latérale, comme le ferait des ailerons classiques et non simplement une traînée.

Le dessin de telles cellules est certainement plus difficile que celui d'un simple "filet". Mais au minimum, il pourrait être stratégique de ne pas utiliser le mot "grille" et de le remplacer par "panneau cellulaire", ainsi que le site http://www.kosmonavtika.com/vaisseaux/soyouz/tech/sas/sas.html de Nicolas Pillet (que tu dois connaître). Amicalement, Bernard de Go Mars (talk) 13:25, 4 October 2019 (UTC)