Gun sight image size analysis

[bustr]

Buamer,

The K14 has two imageing lenses. The right hand one has a fixed ring with cross center dot and the left hand has the six sided computing star with dot. I know you could lock out the ranging six pointed star and use the left hand circle as a fixed reticle ring and do the same for the right hand star reticle locking it in a fixed aspect. Did the left and right hand lenses project the reticles to the center of the reflector glass, or just stright up on the left or right hand side of glass?

If it is simply straight up on the left or right hand side, then to be accurate we would need two reticle for the K14 and the player would have to decide to move their center forward view left or right like on the P47D-11 to use one or the other reticle.......

[Saxman]

I added so much blur and illumination to it, it now looks exactly and measures like the YouTube video you were refrencing.

I'd be careful using those videos as a reference, particularly if the sight has been jury-rigged in some guy's basement. The amount of blur and red in the sight is the result of how much power if being fed to the sight, and the quality of the bulb. When the reticle is in the red spectrum and heavily blurred, it's an indicator that the sight is not powered properly, or has a bad bulb. With the right amount of juice and a good bulb you're looking at a sight that's more yellow with a sharper image.

[bustr]

Ok I'll back the blur and illumination down to your MkVIII. No problemo. Thats less clutter unzoomed.

[RTHolmes]

so Ive been playing around with some gun sights, almost got my B&S ones done.

whats the deal with alpha channel/transparency? I notice my sights have a ?blue background when you select them in options, all the others are black. I used a black background.

[jamdive]

This photo was taken from the inside of a spitfire cockpit almost exaclty as the pilot would see it. notice the double image. The actual sight image is the bottom one.

[TequilaChaser]

I got this off a website and compiled them to these docs.  Its 1 zip file with about 6-8 docs on all the gunsights.

http://www.arabian-knights.org/files/Dogg/Histgunsightdocs.zip

Thanks Dogg, just a lil note... these word documents are in the docx file extension ( think only windows 2007 or 2010 will open them, unless you have the patch file to access docx files with MSword2003 or 2002 )

will be looking forward to your completed Gunsights package or saxman's......

great work everyone

[RTHolmes]

afaik any version of word will open them if you install the office file format converter patch (I'm using office 2000.) might even open in wordpad with this patch (havent tried it) or, better, use the free OpenOffice

[BulletVI]

(Image removed from quote.)

This photo was taken from the inside of a spitfire cockpit almost exaclty as the pilot would see it. notice the double image. The actual sight image is the bottom one.

I just asked my Father about this who was in the RAF when our jet fighter's where still using this Mark of gun sight. All thought it wasn't his Job to deal with the Gun Sight ( he was air frames ) He said that that may have been the later war version Gunsights as what you would do is in a dog fight the pilot would some how bring both sight's in to alinement on the aerial target  then fire. But he isn't sure.

What make of Spitfire is it ??  is it the mk 17 ?????? Or an end of-line Make ( one of the last mark's made ??? )

[RTHolmes]

This photo was taken from the inside of a spitfire cockpit almost exaclty as the pilot would see it. notice the double image. The actual sight image is the bottom one.

nice - looks exactly the same size as mine (guess I got my sums right then ). any idea how far from the sight the camera was?

[jamdive]

nice - looks exactly the same size as mine (guess I got my sums right then ). any idea how far from the sight the camera was?

The photo was taken from the seated position. The spitfires cockpit is very crunched imo. As far as the second reflected image, thats just what happens when the sight reflects off the windshield. An annoying biproduct. I have a few more photos of this plane somewhere. Its restored right down to the spare gunsight light bulb rack on the right side.

[BulletVI]

The photo was taken from the seated position. The spitfires cockpit is very crunched imo. As far as the second reflected image, thats just what happens when the sight reflects off the windshield. An annoying biproduct. I have a few more photos of this plane somewhere. Its restored right down to the spare gunsight light bulb rack on the right side.

Ah COOL then forget my earlier post then 

[bustr]

nice - looks exactly the same size as mine (guess I got my sums right then ). any idea how far from the sight the camera was?

I went with 80mil as the 100mph ring. What did you go with?

That picture looks like to the right is an adjustment knob for the angle of the reflector plate. There was a version of the Mk2 used in Typhoon where the reflector plate could be moved 5 degrees to lower the reticle to account for the drop on the HVAR rockets. The reticle seems a tad low<5deg> for guns combat.

[RTHolmes]

my calcs from the only evidence I could find for the plain circle and dot version gave either 66 or 73.3mil depending on how you calculate it. the one with lines has surely got to be the same (certainly looks like it from pics of the illuminated graticule). given the USAAF? versions of the same sight used 70/140mil ive assumed 70mil. this matches up nicely with all the pics I have too. I'll post all the pics and calcs when I post the sights

The photo was taken from the seated position. The spitfires cockpit is very crunched imo.

ty, just wanted to compare it with the AH version. yeah its tiny isnt it? one advantage though - pilots could brace their elbows against the side of the cockpit to steady the stick while lining up their shot

[BulletVI]

Just noticed something there with the sight. Either the sights gyroscope needs recalibrated ao the Spit isn't sitting on level ground The sight isn't centred

[bustr]

See the littel knob to the right. Bet that sight is a variation on the Mk2L used by Typhoons with the 5 degree tilt in the reflector plate to lower the center dot to fire rockets. Somebody at the restoration nees to turn the knob again for another picture.