BOOK REVIEW ON MACHINING AIRCRAFT ENIGINE PARTS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00809A000700130029-4
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: September 26, 2011
• Sequence Number: 29
• Publication Date: August 20, 1953
• Content Type: REPORT

Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP80-00809A000700130029-4
CLASSIFICATION CONFIDENTIAL
SECURITY INFORMATION
CENTRAL INTELLIGENCE AGENCY
INFORMATION, FROM
FOREIGN DOCUMENTS OR RADIO BROADCASTS
REPORT
CD NO.
DATE OF
PUBLISHED Monthly DFST.2?Au0 1953
periodical
WHERE
PUBLISHED Moscow
DATE
LANGUAGE
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NO. OF PAGES 2
SUPPLEMENT TO
REPORT NO.
THIS IS UNEVALUATED INFORMATION
The following is a resume of a book review, written by I. Ya. Li-
khobabenko and Yu. V. Kalganov, on Tekhno;_ogiya Mekhanieheskoy Obra-
botki Detaley Aviadvigateley (The Technology of Machining Parts for
Aircraft Engines) by F. T. Blinov and V. P. Firago, Moscow, Oboron-
giz. 1951.
Special Soviet technical books rust instruct the youth in the latest
achievements in science and techniques. The book t_ing reviewed does not meet
this requirement.
For example, the paragraph on heat treatment of parts and its place in
the technological process is poorly composed and briefly written. Heat treat-
ment is one of the most important technological processes in the manufacture of
parts for aircraft engines.
In 3iscuosing the p: '.)lems of distortion and buckling of parts during heat
treatment, the authors of the book specify that the use of high-frequency cur-
rents and cold processing considerably lovers the occurrence of distortion.
However, they do not explain for what types of parts 3r under what conditions
such types of heat treatment can be used.
In the chapter on thread cutting, the authors of the book describe in de-
tail obsolete methods of thread cutting, but devote very little attention to
advanced methods, such as thread nulling and high-speed thread cutting.
Self-releasing chucks have not been described. Designs of taps have not
been given, and the peculiarities of cutting threads in aluminum and heat-re-
sistant materials have not been covered.
Obsolete designs of threading-die heads with radial chasers.-have been
shown but heads with rolled threaded dies were not included.
The authors of the book have described gear processing methods which are
not used at plants of the aircraft industry.
CLASSIFICATION
STATE NAVY NSRB
ARMY AIR IXI FBI
CONFIDENTIAL
DISTRIBUTION
-[I
Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP80-00809A000700130029-4
 Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP80-00809A000700130029-4
The authors have frequently used terminology ac variance with accepted
usage. In some cases, incorrect terminology has been used. For example, they
have incorrectly called the electric-spark method of metalworking the electro-
dynamic method. In addition, they have erroneously asserted that kerosene is
usually used as the working liquid in electric-spark processing whereas, in
fact, mineral oil is used for this purpose.
Electric spark hardening of cutting tools was not even mentioned.
In addition to errors made in the chapter on machining turbine blades, the
authors showed the backs of blades being machined on u universal lathe with a
primitive contouring device. They did not show +,,- special high-production ma-
chine tools such as the Model MK-54 semiautomatic lathe, the xiii-6c /TIT are
Roman numerals/ grinding machine, etc. which have been manufactured t? the So-
viet machine tool building industry.
The book recommends methods of production which have not yet been adopted
by series-producing plants; in particular, the processing of compressor blades
from stamped blanks. Nothing was said about machining the feathers and edges
of caroressor blades. In general, the production of compressor blades has not
been given sufficient attention. The compressor blade is shown with a fir-
tree root, which is not being used at the present time.
In view of the fact that compressor blades are not manufactured by casting,
it is incorrect to say that "the manufacture of precision dies and castings
made of aluminum alloys does not involve any great difficulties. Blanks for
compressor blades and guide apparatus are obtained by these methods."
No mention has been made concerning the application, at plants, of dynamic
balancing of impellers.
The au~hors have not elucidated the problems concerning the manufacture
of separable crankshafts for air-cooleL radial engines. There are certain
operations in machining crankshafts for radial engines, which are not required
in machining shafts of in-line engines. Among these operations are the rmchin-
ing of splines, cutting of threads, and assembliing of separate parts into a
unit.
Unless the book is radically revised, it cannot ice reconmiended as a manual
for engine-building tekhnikums.
CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP80-00809A000700130029-4