[Milsurplus] Re: What did they talk to ??

[Bob Camp]

Hi

HF command sets definitely were used for communications between  
aircraft. They are good lightweight radios. Unfortunately they don't  
put out enough power to talk back to base when you are over target on  
a typical B-17 mission. I'm sure it happened under unusual  
conditions. The high power radios were heavy enough that if they  
didn't need to haul them along they would have left them behind.

     Take Care!

             Bob Camp
             KB8TQ

On May 3, 2005, at 7:10 AM, Bob Wilder wrote:

> According to the pilot of "Patches", the B-17 which appears on the  
> 32 cent airmail stamp, the radio operator used the BC375 to send  
> the strike report right after the plane left the target.  The only  
> time the pilot used the command set was during emergencies while in  
> combat.  Otherwise all comm was performed by the radio operator.
>
>
>
> At 12:31 AM 5/3/2005 -0400, J. Forster wrote:
>
>
>> This table is essentially the geometric distance to the horizon:   
>> From Google:
>>
>> A NASA website (http://www-istp.gsfc.nasa.gov/stargaze/ 
>> Shorizon.htm) describes how to calculate the distance to the
>> horizon. Their formula is in metric units, so I have converted it  
>> to imperial. It is D = 1.223 x sqrt(h) where h is the
>> height in feet. The result D is in miles.
>>
>>
>> 1000'         D= 38.6  mi
>> 10,000       D=122.3  mi
>> 30,000       D= 211.8  mi
>>
>> -John
>>
>> Mike Morrow wrote:
>>
>> > >Also the question was asked about the max range of the SCR-522  
>> on VHF.
>> >
>> > Many of the WWII airborne VHF set operating instruction manuals  
>> contain a graph of line-of-sight miles vs. aircraft altitude, and  
>> that range was pretty much independent of the power output of the  
>> transmitters.  The graph that's in the manual for the AN/ARC-4 (AN  
>> 08-10-245), for example, gives the following:
>> >
>> > Altitude (ft)     VHF LOS Range (Statute Miles)
>> >
>> >   1000                  40
>> > 10000                 115
>> > 30000                 210
>> >
>> > Mike / KK5F
>>
>>
>>
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>
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