[Milsurplus] [Boatanchors] Hallicrafters and A-Bombs (Hello, NSA and HSA!)

[J. Forster]

I wonder if those pressure probes might have been ART-4 derived, because
that's exactly what the ART-4 does...  it monitors pressure pulses to
determine target scoring for gunnery practice.

They transmit on 55.5 and 56.75 MHz.

-John

=============



> Nope.  The radar altimeters were in the 400mHz range.
>
> Three AN/ARR-5 receivers were used in whatever Silverplate airplane was
> designated the instrumentation aircraft for each mission, with the task of
> dropping three parachuted pressure instruments to monitored the pressure
> wave created by the weapon.  With that data and knowing the altitudes and
> positions of the three canisters, it was possible to calculate the size of
> the over pressure pulse and thus the yield of the weapon.  The
> instrumentation aircraft preceded the weapon carrier, IIRC, to allow the
> canisters time to descend a bit from the high altitude the aircraft were
> flying. The canister frequencies were clustered around 50MHz or
> so...somewhere back home I have the specific freqs involved from a LASL
> report years after the fact.  So, the S-36 was probably in the rack to
> permit calibration of the pressure sensors for testing.
>
> 73,
> - Mike  KC4TOS
>
>
>
>> On Mar 30, 2014, at 11:01 AM, "David Stinson" <arc5 at ix.netcom.com>
>> wrote:
>>
>> I guess it would work better with the link:
>>
>> http://www.alternatewars.com/Bomb_Loading/Bomb_Guide.htm
>>
>> The receiver is an S-36, so likely to listen to the altimeter
>> transmittters.
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