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Author Topic: The Sniper's nest ergonomics.  (Read 1150 times)

Online Charles Collins

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Re: The Sniper's nest ergonomics.
« Reply #10 on: June 28, 2019, 06:11:39 PM »
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Wondering what the object on the floor is. Seems like a light bulb or a stubby screwdriver.

I believe that it is a flashbulb from one of the cameras that were up there at that time. They were one-time use bulbs and trash after they were used.

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Re: The Sniper's nest ergonomics.
« Reply #10 on: June 28, 2019, 06:11:39 PM »

Offline Bill Chapman

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Re: The Sniper's nest ergonomics.
« Reply #11 on: June 28, 2019, 07:15:50 PM »
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Wondering what the object on the floor is. Seems like a light bulb or a stubby screwdriver.

I read somewhere that two light bulbs were turned off or missing in the corner

Online Charles Collins

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Re: The Sniper's nest ergonomics.
« Reply #12 on: July 02, 2019, 09:12:15 PM »
This is still a work-in-progress, but here is a preview of the 3D mock-up of the sniper's nest that I am working on:










« Last Edit: July 02, 2019, 09:37:13 PM by Charles Collins »

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Re: The Sniper's nest ergonomics.
« Reply #12 on: July 02, 2019, 09:12:15 PM »

Offline John Mytton

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Re: The Sniper's nest ergonomics.
« Reply #13 on: July 03, 2019, 03:01:11 AM »
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This is still a work-in-progress, but here is a preview of the 3D mock-up of the sniper's nest that I am working on:












Nice work, I look forward to see how this progresses. One thing I'd like to see is a recreation of the Powell Dillard photos and more proof that the boxes weren't moved. Also the outermost tip of the angled rolling reader box is definitive proof that the Police didn't mock up the rifle rest.





JohnM


Online Charles Collins

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Re: The Sniper's nest ergonomics.
« Reply #14 on: July 03, 2019, 02:35:24 PM »
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Nice work, I look forward to see how this progresses. One thing I'd like to see is a recreation of the Powell Dillard photos and more proof that the boxes weren't moved. Also the outermost tip of the angled rolling reader box is definitive proof that the Police didn't mock up the rifle rest.





JohnM

Thanks John, here are two views from my mock-up to compare with Powell's and Dillard's photos with:





I am not a photographic expert. However, it appears to me that Powell must have been very close to the corner of the county records building. The location on Roberdeau's map might be off a little, or I am looking at things wrong.


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Re: The Sniper's nest ergonomics.
« Reply #14 on: July 03, 2019, 02:35:24 PM »

Offline Jerry Organ

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Re: The Sniper's nest ergonomics.
« Reply #15 on: July 25, 2019, 02:17:06 AM »


In my now-revised model, I have the west pipe on the line that runs out from the edge of the masonry opening. This is based on a new method of photo-matching I am experimenting with. I have not received measurements from the Museum which will remove all doubt.

My distance from the masonry opening to the west east wall is 32". Yours is probably different based on how the model was built. Measurement for the east pipe go to the pipe, not the coupling on the floor.

In an earlier version of this, I incorrectly placed the line on the floor at a right angle to the floorboards.

« Last Edit: July 25, 2019, 01:57:34 PM by Jerry Organ »

Offline John Mytton

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Re: The Sniper's nest ergonomics.
« Reply #16 on: July 25, 2019, 07:19:55 AM »
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Thanks John, here are two views from my mock-up to compare with Powell's and Dillard's photos with:





I am not a photographic expert. However, it appears to me that Powell must have been very close to the corner of the county records building. The location on Roberdeau's map might be off a little, or I am looking at things wrong.

 Thumb1:

Thanks Charles, I missed your post the first time round. Your 3D model proves that the rolling readers box was angled down Elm street and the boxes behind were never moved.

JohnM

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Re: The Sniper's nest ergonomics.
« Reply #16 on: July 25, 2019, 07:19:55 AM »

Online Charles Collins

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Re: The Sniper's nest ergonomics.
« Reply #17 on: July 25, 2019, 12:47:43 PM »
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Thumb1:

Thanks Charles, I missed your post the first time round. Your 3D model proves that the rolling readers box was angled down Elm street and the boxes behind were never moved.

JohnM

You’re welcome John. Creating the mock up was a lot of tedious work. But definitely worth while. Now, if I just had the knowledge and tools to turn it into something that would work with the virtual reality head mounted displays, etc. That would be very useful.

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Re: The Sniper's nest ergonomics.
« Reply #17 on: July 25, 2019, 12:47:43 PM »

Online Charles Collins

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Re: The Sniper's nest ergonomics.
« Reply #18 on: July 25, 2019, 01:02:41 PM »
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In my now-revised model, I have the west pipe on the line that runs out from the edge of the masonry opening. This is based on a new method of photo-matching I am experimenting with. I have not received measurements from the Museum which will remove all doubt.

My distance from the masonry opening to the west wall is 32". Yours is probably different based on how the model was built. Measurement for the east pipe go to the pipe, not the coupling on the floor.

In an earlier version of this, I incorrectly placed the line on the floor at a right angle to the floorboards.



Thanks Jerry. I like the spirit of cooperation we have on this stuff. By the way, I think that the wall you labeled as the west wall is actually the east wall. For what it is worth, I measured the hardwood floor boards in our house and they are 3-1/4” wide. Also, the pipes appear to me to be electrical conduit. I looked up the standard dimensions for 1-1/2” rigid steel conduit. The outside diameter is 1.9.”

Offline Denis Pointing

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Re: The Sniper's nest ergonomics.
« Reply #19 on: August 12, 2019, 02:39:17 PM »
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Thanks Jerry. I like the spirit of cooperation we have on this stuff. By the way, I think that the wall you labeled as the west wall is actually the east wall. For what it is worth, I measured the hardwood floor boards in our house and they are 3-1/4” wide. Also, the pipes appear to me to be electrical conduit. I looked up the standard dimensions for 1-1/2” rigid steel conduit. The outside diameter is 1.9.”

Charles, it's no good measuring the floorboards in your house, the flooring in the TSBD is industrial, not domestic. Also, those pipes are definitely not conduit. I really don't understand why you guys are still struggling with this. You have the best standard measurement possible in the photo. As I posted earlier, 3no vertical courses of bricks plus cement bed is between 8''-8.5''. Now all you need to do is measure the 3no courses on your monitors with a small compass set and all the other measurements, floorboards, pipes etc, all fall into place. I've not done it myself but I'd be very surprised if the flooring isn't approx 6'' and the pipes 4''. 

PS If you try this don't forget the first course of bricks is only half visible. Measure the three above. Good luck.
« Last Edit: August 12, 2019, 02:47:15 PM by Denis Pointing »

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Re: The Sniper's nest ergonomics.
« Reply #19 on: August 12, 2019, 02:39:17 PM »

 

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