retained the snap-bag gas-sampling devices used in IVY.
The B-36s we
Fitted with a filter installed in the cabin pressure system and each rp-
ceived both a double-squeegee gas-sampling system and a particulatesampling device.
One of these B-36s was equipped with an array of ele
tronics to serve as backup to the primary B-36 controller, which, likel the
F-84Gs, was also used in IVY (Reference 29, pp. 97-98).
were equipped to perform "heavy nuclide" sampling.
The WB-29 air
The WB-29s carried
"shoe box" in each wing; each box had two filter panels but the aircra
had no special instrumentation, controls, or sampling indicators.
The
only proof of sample collection while airborne was the aircraft backgrpund
as measured by a T1-B radiac meter
(Reference 29, Chapter 8, et seq).
The double-squeegee was designed for operation at altitudes of 36,
to 50,000 feet
(10.97 to 15.24 km).
‘Two air-cooled, four-stage radial
pressors, operated electrically, exhausted a portion of the jet engine
take air into a 500-in- (8,193-cm>) collection vessel at 3,000 Lb/in?
(211 kg/om-).
Each compressor was rated at 1,728 in?/min (28,317 on? / i
Both compressors operated in parallel, pumping into a single collectio
vessel.
There were two versions of the double-squeegee that differed
with respect to filtering the compressor input air.
A "special" doubl
squeegee was used on three F-84Gs, which contained a special filter in
gral to the sampling system.
The other seven F-84G systems used the f
in the cabin pressurization system (Reference 29, Chapter 8 et seq).
passing through the filter was not used for breathing during cloud sam
operations; TG 7.4 policy required sampler aircraft personnel to breat
100-percent oxygen from the time of cloud entry to mission completion
Enewetak.)
Table 12 summarizes the sampling systems installed on the
F-84Gs.
The RB-36 that served as the airborne sampler controller was No. 1
(radio call sign Cassidy).
The radio compartment contained two ART-13
transceivers; one operated in the range of 3.3 to 18.1 MHz, the other
200 to 600 kHz.
The TG 7.4 Technical Advisor rode in this compartment
had selection switches enabling monitoring or communication with sampldr
136