Fs
atede
ie
hel
aS aria nih
oh
the stylus point.
(5) Cover.
ap
i fi
iy
Vd
ng
i
nalts tae
eal
se
aL aa
The cover was bolted to the gage plate and was
provided with 2 1/2 inch diameter pipe threads to permit auxiliary
mounting.
,
(6) Adaptor Ring. An adaptor ring was provided which
bolted to the gage plate and was provided with 6 inch internal threads
for mounting on the standard gage mount.
A
ia]
pAyCg
il Xd
The gage without the cover is snown on Figure C.U.
cover, ready for installation, is shown in Figure C.17.
The gage with
The gage was calitreted as a complete unit. The calibration presfy sure steps were placed on ihe record blank. After calibration the
iy LJ blank was advanced.
‘This movement caused a base line to be scratched
; | ,on the blank,
\\ / installation,
~
The cover was then assembled and the gage was ready for
Figure 3.15 is a photograph of a record blank showing
the ycalibration steps, the base line, and a typical peak pressure
reegrd.
3
2
B.6 ‘DYNAMIC FRESSURE GAGE
B.6.1
zp
General.
pay
Thé\dynamic pressure gage or "q" gage is a self-initiated, self-
recording gages fan measuring dynamic pressure. Static pressure and
stagnation pre2nstres are recorded on a single aluminized glass disk
by the action cae pressure sensing capsules.
The gag mee e
diameter with ah
Figure C.9) is 38 inches long and 3.8 inches in
12 5/8 inches from
“inches.
The stagna
ameter of 1/4 inch,
rical nose.
The static pressure inlet is
ront of the gage end has a diameter cf 0.15
pressure inlet is 11 inches long with a di-
pt
for the first half inch from the front
which is choked down to 3/
inch.
Two 53-inch female pipe weldolets
are welded to the bottom ofjthe gage for mounting. The gage is mounted
on two 6 1/2 foot lengths
3-inch pipe, broken 18 inches below the
gage with unions to facilitate recovery.
Projecting laterally from
the rear of the gage are a photohiyhe and a fusible link for initiation
of the gage.
i
B.6.2
Uo
Recording System
4
é pressure sensitive capsule
e mounted with the axis of
each 90° apart in a plane through the
face of the recording disk.
The capsules are positioned such that
the sty,
will scratch
concentrate traces 1 13/16 inches and 1 $78 vhones in diameter on the
aluminized coating on the disk.
re?
Rigid mounting and precision machinidgtre critical in the unit
consisting of the recording disk, turntable, mountsg~and.drive motor,
(see Figure C.10). Because of a 2-to-1 gear reduc ‘ the turntable
is driven at 5 rpm by a 10 rpm chronometric govern
giving a stylus to disk speed of 0.4745 in./sec.
element and 0.4254 in./sec. for the static element.”
61
volt DC motor,
e stagnation