[Milsurplus] PU-18/A ???

[David Ross]

Jay & the gang -

   You mentioned blowers with an HD- designation.  Usually these 
designations make sense, but but how does an HD- prefix relate to a 
device that moves air?  Maybe like "Howl Device"?

   That is the case with both the TRC-75 & TSC-15, they are full of HD-* 
blowers & fans and definitely rate earplugs or headphones while in 
operation.

Dave Ross    N7EPI



jcoward5452 at aol.com wrote:
> Ps to last message.I have some mil equipment cooling blowers that drive 
> me out of the house!I think these came out of Viet Nam era helicopters 
> where noise probably was not an issue.They are labeled 
> HD-15/U,27.5V.Probably used in other aircraft as well.
> I thought they might add some background "ambiance"!
> Jay
>