This document records measurements of air leakage from drum parts. Flatness measurements were taken of the rear and front bulkhead drum rings by laying them flat on a table and measuring the maximum distance off the table. For the rear bulkhead, the maximum distances off the table were 3.13mm and 1.32mm. For the front bulkhead, the maximum distances off the table were 0.330mm and 0.305mm. The document also references engineering drawings that specify tolerances for flatness measurements.

1. P2 Drum air leakage
Wesley Roberts - 8/23/2016

2. Measurement of flatness on the rear bulkhead
drum ring
8/23/2016 2
• Rear bulk head laid flat on
table, with the drum ring
down.
• The measurements taken are
the highest gaps of the drum
ring off of the table.
Table

3. Drawing Callouts
8/23/2016 3
• Drawing 1375566 calls the tolerance of datum
plan A to be +/- 0.5mm.
• The edge of the drum ring is at a distance of
16.64mm from datum A with a tolerance of
+/- 0.3mm
• The total flatness of the drum ring is called out to
be within +/- 0.8mm

4. Location of Rear Bulkhead measurements
• Height measurements were taken from the
top right and bottom left. (Red squares)
• These is were the maximum height the drum
ring was off of the table.
8/23/2016 4
• The measurements were taken using a
Protp Feeler guage

5. Maximum Warp Rear bulk head
Unit 4208 (MVT)
Location
Distance off table
(mm)
Bottom left 3.13
Top Right 1.32
8/23/2016 5
Unit 3242 (DVT)
Location
Distance off table
(mm)
Bottom left 1.50
Top Right 0.88

6. Measurement of flatness on the front
bulkhead drum ring
8/23/2016 6
Table
• Front bulk head was laid flat on
table, with the drum ring down.
• The measurements taken are the
highest gaps of the drum ring off of
the table.

7. Drawing Callouts
8/23/2016 7
• Drawing D0049381 calls the tolerance of datum plane A
to be +/- 0.5mm.
• The edge of the drum ring is a distance of 17.92mm
from datum plane A with a tolerance of +/- 0.3mm.
• The total flatness of the drum ring is called out to be
within +/- 0.8mm .

8. Maximum Warp Front Bulkhead
8/23/2016 8
Unit 4208 (MVT)
Location
Distance off table
(mm)
Bottom left 0.330
Top Right 0.305
Unit 3242 (DVT)
Location
Distance off table
(mm)
Bottom left 0.508
Top Right 0.533