Any chance to have in a future the Oigee tubular gunsight on late German fighters?

[greybeard_52]

Albatros D.V

Fokker Dr.I

Fokker D.VII

By Oigee I mean what is the Aldis in the game, of which the Oigee was a copy.
On the other hand, the reflection sight by the same company currently proposed for the latest German fighters does not seem historically correct to me, given that there is no evidence of its widespread use. On the contrary, it appears that only one prototype has been built and tested.

 

On this occasion, I enclose below a study I collected some time ago on the subject (with related references), in case it can provide some interesting information:

"http://www.theaerodrome.com/forum/showpost.php?s=b49496c823a36b8dabd2ad3db472fd20&p=174975&postcount=4

optical sights were very common, never heard of the Aldis?

I have a reference to a British pilot flying a Nieuport fitted with the Collimateur Chretien sight and commenting that it was better than the Aldis.

From Harry Woodman's "Early Aircraft Armament":

He mentions Zeiss, Goertz and Busch optical sights, then:

"The Oigee firm produced a telescopic tubular sight which was issued in 1918. German pilots often fitted captured Aldis sights to their machines, while the French adopted a collimateur clair, Chretien de 25mm which was similar to the Aldis".
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http://www.theaerodrome.com/forum/showpost.php?p=76760&postcount=7

As noted, the tube is an Aldis gunsight. It did not color or reduce the viewed object. Nor was it a telescopic sight. Rather it was a 1:1 sealed optics system. Why a 1:1 optical system? It was very hard to properly align the eye, the ring, and the bead of a ring and bead sight when you were pulling "g" and pursuing an enemy airplane that was all over the sky. The Aldis optics solved this problem by presenting an accurate sight picture even if the pilot's eye, looking into the sight from about a foot away, was off center by several degrees. With a ring and bead sight that much error in eye positioning would leave you shooting air. The view through the Aldis, however, would accurately show where your bullets would be going despite the incorrect position of the pilot's eye. The Aldis was highly regarded by both sides, but the German attempts to copy it could never overcome problems with fogging. Captured units, once damaged or disassembled for examination, would also fog, but undamaged and un-disassembled units had no fogging problems. What the Germans never realized was that the "air" in the Aldis wasn't oxygen, but a mix of other gases that prevented fogging. The Aldis continued in service with the RAF up until the outset of WW 2.
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http://www.theaerodrome.com/forum/showpost.php?p=192995&postcount=13

Collimated lenses are lenses arranged to provide parallel projections of light. As I understand optics (corrections gladly accepted), lenses in a telescopic site are not delivering parallel projections--if they were they would not present a magnified image. Thus the sight's name, taken in combination with your description of a tube optical sight, would suggest the Collimateur Chretien, like the Aldis, was a 1:1 ratio. I would note that reflector sights, such as were under development in Germany at the end of the war and as were used by both sides in WW2, also use collimated lenses, but this is not the type of system you have described.
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http://www.aviation-14-18.fr/aviation-française/armement-et-collimateurs/

Appareil de visée dit "collimateur"

Tout avion comportant le tir à travers l'hélice est muni d'une ligne de mire naturelle formée par 2 tiges (guidons) réglables en hauteur et en direction. On doit de plus pouvoir y installer un des appareils suivants :

-un collimateur clair CHRETIEN de 25 mm de diamètre,

-un collimateur de 45 mm de diamètre.

L'appareil de visée doit être fixé à l'avion par l'intermédiaire d'un support et de boulons à prévoir par le constructeur. L'axe optique de l'appareil de visée sera disposé à 10cm environ du plan de symétrie de l'avion et à hauteur de l'oeil. La visée doit pouvoir se faire sans que l'oeil soit gêné par le vent; à cet effet on fait passer le collimateur à travers le pare-brise. La visée est facilitée en installant un appui-front sur lequel le pilote appuiera sa tête pendant le combat.

Le collimateur CHRETIEN du nom de l'inventeur et ici construit par J.BELUGOU et se trouve dans son emballage d'origine.

Henri CHRETIEN est un ingénieur opticien déjà réputé quand éclate la 1ère guerre mondiale (auteur de l'Astronomie Populaire). Il se porte volontaire et fut affecté à la Section Technique de l'Aéronautique militaire pour la mise au point de calculs et d'inventions d'instruments d'optiques de précision pour l'aviation. Il réalisa pour le chef d'escadrille Georges GUYNEMER un appareil destiné aux mitrailleurs de l'aviation, "le collimateur clair Chrétien".

Lunette de visée dit "collimateur" du fabricant LEMAIRE à Paris. Petit modèle de 25mm de diamètre.

Pour une vision optimale, le pilote doit avoir l'oeil directeur dans l'axe du collimateur et être à une distance de 7 à 10 cm.

Ce modèle de collimateur possède un système d'obturation de la lentille avant, évitant ainsi le gel ou les salissures d'huile moteur. Une simple pression sur le bouton avant et le volet d'obturation s'ouvre."

[LukeFF]

Not at this time, no. The Oigee sight presented a magnified picture, and the only way to have magnified sights like that right now is with a 2D display like on the Ar 234 or Me 410.

 

https://www.deutscheluftwaffe.de/flugzeug-zielfernrohr-oigee-1917-3

https://www.deutscheluftwaffe.de/flugzeug-zielfernrohr-oigee-1917-2

https://www.deutscheluftwaffe.de/flugzeug-zielfernrohr-oigee-1918-6