DEAR RAY:

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001600020059-9
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 1
• Document Creation Date: December 28, 2016
• Document Release Date: April 19, 2000
• Sequence Number: 59
• Publication Date: November 5, 1963
• Content Type: LETTER

ST~d For Reuse 2000/06/07 :CIA-RDP78B47A001600020059-9
Ref: E80
STATOTHR
Was ington, D. C.
Dear Ray:
^ 5 November ]963
Declass Review, NIMA/DoD
We have made some further calculations, after speaking with you last, regarding both
the cooling air and vacuum requirments.
noise so naturally, it is desirable to obtain low inlet temperatures. Regarding the vacuum,
we estimate that 50 to 80 cfm of 1 psi vacuum is sufficient to do the job, depending. upon
the porosity of the paper used for charts.
r, mier _ana it, a~ou~rx~~ntipned the inlet air temperature becomes as
high as 0?F ,the re uirement ium~s to 750 f, ,. Above 50?, the volume rises even
higher. Higher volumes require bulkier air handling equipment and produce more air
may need to dissipate about 26,000 BTU per hour. Considerin a vario,~~s terr~pe,ra~'uXe
rises in each of the elements, a total capacity of abou 0 ',.e.,..f~e~;.a~~~.m_i_nute of 42
The system, consisting of an electrical control cabinet and the high speed coordinatograph,
1 would be delighted to discuss both these problems more fully with your building
superintendent if you will have him call me.
Sincerely,
STATOTHR
'roject Engineer
Approved For Release 2000/06/07 :CIA-RDP78B04747A001600020059-9