[Corey, Hugh, Scott]
In a continued effort to figure out the Support Tube/V-block discrepancy noticed between H1 & H2, Scott and I tried a couple more measurements (vs the Air Bearing/Air Bearing measurement we made Fri). On Friday, we determined that the distance between Crossbeams is the roughly the same for H1 & H2, BUT visually it looks like the Support Tubes appear to be different lengths between H1 & H2 (on H2, the Support Tubes look smaller and instead of being flush with the V-Block, they are inside the V-Blocks.
Today, we removed the Accelerometer plates of a few H2 Support Tubes, hung plumb bobs off the end of the Support Tubes, made a mark on the floor and then measured the length of the Support Tubes via these floor marks. This was also done on H1 (it was noticeably harder because of all the cables and cable trays).
Aiming to have an accuracy within 1/16th, here are the results from the random chambers we looked at:
- HAM7 west Support Tube: 93 1/8"
- HAM7 east Support Tube: 93 3/16"
- HAM8 west Support Tube: 93 3/16"
- HAM8 east Support Tube: 93 1/16"
- HAM2 west Support Tube: 94"
- HAM2 east Support Tube: 94 1/16"
Now as a comparison, the drawing for the Support Tube (D972610) shows a Support Tube length distance of 93.190" (~93 3/16"). So, it appears our H1 Support Tubes are longer (whatever that means....beause H1 Support Tube/V-block connections look better).
It appears the extra distance is all in the "nose". We made a measurement from the outboard surface of the Bellows out to the end of the Support Tube, and we could see an obvious length distance here. For the H2 Support Tubes, this distance is ~3 19/32" and for H1 this distance was ~4 3/32".
Notes on attached photos:
Photo#1: The "inboard" H2 Support Tube in its V-Block (at HAM7)
Photo#2: The "flush" H1 Support Tube in its V-Block (at HAM6)
