NOTE(Sanitized)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A002900020066-8
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 1
• Document Creation Date: December 28, 2016
• Document Release Date: August 30, 2005
• Sequence Number: 66
• Publication Date: July 11, 1964
• Content Type: NOTES

TAT
Approved For ease 2005/11/211`: CIA-RDP78BO471002900020066-8
"1.-0
July 11, 1964
These are the physical-metallurgical properties of importance
in materials for measuring-engine construction:
1. Modulus of elasticity (Young's Modulus).
2. Density.
3. Ratio of Young's Modulus to density (stiffness to
weight ratio).
4. Thermal capacitance.
5. Thermal conductivity.
6. Coefficient of thermal expansion.
7. Creep or long term dimensional stability (strain
relaxation).
8. Internal damping.
9. Ease of fabrication.
The properties will be investigated, compared, and evaluated
for:
1. Meehanite.
2. Steel.
3. Granite.
4. Aluminum.
5. Magnesium.
6. Glass.
Certain geometrical principles of construction which will
maximize rigidity may be of equal importance to the character-
istics of the materials. These principles will be enumerated
and described. It is surprising how often the basic prin-
ciples are violated in construction design.
Declass Review by NGA.
Approved For Release 2005/11/21: CIA-RDP78BO477OA002900020066-8