FEASIBILITY OF MINIATURE GASOLINE GENERATOR SET. CIA PROJECT # OPC-29-50, AWARD PROJECT.

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03535A000500020043-6
• Release Decision: RIFPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: August 16, 2012
• Sequence Number: 43
• Publication Date: February 7, 1950
• Content Type: REPORT

. Declassified and Approved For Release 2012/08/16: CIA-RDP78-03535A000500020043-6 el
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SECRET
y
Deputy Chief, Engineering Branch 7 Februar 1950
Chief, Electronic Development Section
Feasibility of Miniature Gasoline Generator 14t. CIA Project IOP049-50,
nAWARDn Project.
The follaldngreport is submitted in conpliance with your request of 3 February 1950,
in regard to determining the feasibility of producing a miniature combustion engine
generator set. L internal
The study was divided into congidamilice of the thermal and mechanical efficiency,
temperature rise, weight, and sive and velum requirements.
I. =MAL & MECEANICAL_IMCIENCT OF TWO=
A. The dosigp data of the 2 ayes engine was meager and assumptions will have to
be made in order to evaluate the performance of the Unit. !References that
were consulted are:
1. Marks - "Xechanical Engineers* Eandbookn 4th Idition
2. Streeter &Lichty- ',Internal Combustion &mime
3. Listoe "Aircraft lbgins Dodge
4. "30 Handbook' 1949
The above literature supplied sufficient information an the theory of the
2 cyole engine to calculate the sweated overall efficiency.
B. Engine Input (ETU)
Fuel - assume 200 octane (Ca His)
LEA. ? 22400 EITU/lb.
&igloo Consuactism r. 14 os.. lbs/hr.
10211t fanrc (23400) = 11720 BTU/hr.
Input E.P.
la? - jaar 7?38 LP'
From Ed. 1, P. 1275, the thermal efficiency of this type of engine is given
as 271.104) rrabl Be. 1# P. 1266, a crank case compression power requirement
of? to 12% (asowoo..1210 is necessary. The mechanical efficiency of small
engines mold= exceeds ?8.24% (assumed). Further serious power lass in this
type of engine is due to incomplete combustion and Lick of complete scavenging
which mow approach 50% of the input heat. (Pat. 2# P. 204). Further losses,
of the order of 7% to 20%, are due to conbustion time variation, temperature
distribution in the cylinder, and extrassous heat losses.
,t.i1RET
This document Is part of an integrated
Cie. It separated from itte tile it must be
subjected to laffirkteal systematic review.
Declassified and Approved For Release 2012/08/16: CIA-RDP78-03535A000500020043-6
Declassified and Approved For Release 2012/08/16: CIA-RDP78-03535A000500020043-6
AleAtiirs Omer r aria livAVAINYI LB. att. 7 February 1950
The indicated brake horsepower (ibh) is than equal to:
ibh = 7.32 (.272)(4)(4)(?5)(4) a .652 tab.
The above .652 N.P. is equivalent to 485 watts or 2150 ft. lbs. as abaaParal
to the specification,* requiroments of 200 watt* anti 1184 ft. lbs.
C. The above dammultsutes that sufficient outimit is available hum the engine
to operate the gmerator. Further analgeds ot heat loss indleates the
necessity for including a blaster fan for cooling.
11. FAX
A. The design of earn engine driven **Loma often entails :serious problem'
in the elimination of waste beat without permitting temperature extremism.
the following analysis is a breakdown of the expected heat dissapations
Neat input to engine = 18720 811),/kr.
Menet heat (2% thermal eft.) = 13280 BTU/hr.
Power developed (in terms,-(xfheat)
1. useful power output 000 tiattaihr. = 341.3 iiTeihr.
2. creak ease eonpreen,inm = 2460 IITO/hr.
Net heat to be dissipated = (input).(inchanstMwark)
321270 132e0 4'0101
= 2119 ItiTU/br.
B. This 2189 11111/br. corresponds to a power dissipation or 643 lotto. It is
evident that when 643 watts must be aliednated from a box 6 es 6 x 9 inches
some form of forced draft most be used. It is conceivable that the contractor
is aware of this and any Ina be centimplating the use or a moan fan or
blower. The power to ron the blower is available as deteredned frost the
study of the thermal and mecbanical efficiency of the engine.
pri2114TION OF MONT
A. Comoros% weight
Cowen sdre for coils, eta.
8 coila ? 2 os/coil
Stael
Altaic* VII
Pistons
Cylinder
Aluednumt "stir%
Crankcase
1.0
Field Magnets 1.25
(2-1/2 es)
? 2 It 2 as.) a .25
? 2 x 6 oa.)
1.25
1.0
Alternator shell -about 1411 so 1.0
4. 2 -
Si:CIVET
Declassified and Approved For Release 2012/08/16: CIA-RDP78-03535A000500020043-6