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  #11  
Old 05-07-2017, 05:59 PM
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I realize Charles has this solved now, but for future reference in case somebody else finds this thread doing a search...

I used the loft drawing and the cross section A-A to create a solid model in SolidWorks. The coves are sort of a conic shape intersecting the conic capsule...the attached pics may explain better. I scaled (by Mk. I eyeball) the loft drawing as a "sketch drawing" in SWX then traced on top of it.

Based on the sketch, I get the window coves are 38.622 degrees off center of the capsule. Somewhere, I saw a drawing with the actual angle, but could not find it (I thought it was in ROTW, but it wasn't). If somebody else has that dimension, I could correct the model.

Note I did not model the back-tilt face. I am starting at the base of the cutout, which starts at "Z" 142.1. The bottom of the heat shield/capsule-adapter interface is "Z" 103.44.

The result looks pretty close to the side views I posted above. Originally I used a straight-sided cylinder cutout, but it did not extend far enough down towards the snout.
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  #12  
Old 05-07-2017, 09:35 PM
aeppel_cpm aeppel_cpm is offline
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Looks great.

I cut my coves so the 'floor' was parallel to the long axis. Yours shows a small angle. The other thing, which Luke pointed out, is that the windows aren't supposed to be orthogonal to to long axis, but tipped back. So on your CAD setup, the front of the cone wouldn't be square to the cone's axis.

A complex shape, to be sure. And I'm not even going crazy on detail.
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  #13  
Old 05-07-2017, 10:20 PM
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Quote:
Originally Posted by aeppel_cpm
Looks great.

I cut my coves so the 'floor' was parallel to the long axis. Yours shows a small angle.


Right...that is what I meant when I said I originally modeled this as a straight cylinder (like your cork cutter -- I used an Xacto round cutter to form the coves on a clone I built a few years ago) but the loft drawing (which is a Mcdonnell drawining) shows the radius of the floor changes, but stays on a constant CL

Quote:
Originally Posted by aeppel_cpm
The other thing, which Luke pointed out, is that the windows aren't supposed to be orthogonal to to long axis, but tipped back. So on your CAD setup, the front of the cone wouldn't be square to the cone's axis.

A complex shape, to be sure. And I'm not even going crazy on detail.


That is what I meant when I said I did not tilt the back face.
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  #14  
Old 05-08-2017, 07:24 AM
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They are great reference drawings about a part of the craft that doesn't seem to have much info (easily) available.
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  #15  
Old 05-08-2017, 11:12 PM
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Ok Here's some photos I have of Gemini's... from some studies and photos of mockups of "Big G" (enlarged Gemini concept that was built as a mockup but never flown-- basically it would have used the regular Gemini capsule for its front half, continuing the conical pressure vessel rearwards at the same angle to a much larger diameter heat shield, to enlarge the pressurized volume for a larger crew and more cargo), to a bunch of pics of various Gemini models and displays at Johnson Space Center, Kennedy Space Center, Astronaut Hall of Fame in Florida, Stennis Space Center, USSRC at Huntsville, Alabama, to the Udvar-Hazy Center of the Smithsonian at Dulles Int't Airport in Washington, DC.

Sorry to say that finding a Gemini capsule with the doors still attached is virtually impossible... most of the displays have them removed to see the interior of the capsule more clearly. There might be more data in some of the "study summaries" I've posted on Gemini-related hardware and Big G concepts and such. I'll have to check on that next.

The spacewalk airlock door on the Skylab space station was actually a Gemini capsule door, repurposed for that use. There's a picture of the "instrument compartment" of the Skylab showing the door open on the Skylab trainer in Houston at JSC's Space Center Houston visitor center, but sadly it TOO is open and cannot readily be seen or photographed due to the layout of the display. (It sits on steel legs with a huge pit underneath it, to make it easier to folks to enter and exit the display, which is roped off and makes it impossible to get underneath it to take a better shot of the open door itself).

Later! OL J R
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  #16  
Old 05-08-2017, 11:17 PM
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Here's a couple from my trip to the new visitor center for Stennis Space Center...

Later! OL J R
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  #17  
Old 05-09-2017, 08:07 AM
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Thanks for those pics...they confirm a problem I am having trying to form the tilted cut at the back of the cove to form the face of the window, that it is a smooth transition. Only pics I found showing the doors closed are this post about Gemini clones.
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  #18  
Old 05-09-2017, 05:36 PM
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Quote:
Originally Posted by luke strawwalker
Sorry to say that finding a Gemini capsule with the doors still attached is virtually impossible... most of the displays have them removed to see the interior of the capsule more clearly.


True, but there are pictures of the hatches themselves:
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  #19  
Old 05-09-2017, 10:25 PM
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Bazinga! I finally figured out how to make that cut...I ended up having to make a separate solid piece and subtracting it from the capsule...I haven't used the technique before, but it is pretty slick. I am working on a drawing that will show some dimensions useful for (physical) modeling the capsule and cutouts.
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  #20  
Old 05-10-2017, 08:24 AM
aeppel_cpm aeppel_cpm is offline
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Looks sharp!
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