Conference Report - Hand Crank Generator, HG-3

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-02820A000500020049-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: November 17, 2016
• Document Release Date: March 10, 1998
• Sequence Number: 49
• Publication Date: March 20, 1959
• Content Type: MF

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Approved For Release 2000/09/11: CIA-R
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Conference Report +- hand Crank Genera
20 )crch 1959
1. On 12 :, .rch 1 9 a conference was held in with
representatives of thee to discuss
prototype model of the Hand Crank Generator, HG-3, developed under
Contr^ct RD-138, Task Order 4. Present at the disc .eions Worst
of the HG-3 was demonstrated by ere*
nd,; a leectrically,R the generator performed well.
the generator was used to charge a 12-volt
-cadsd battery rated at 1.6 a re-hours. To this battery,, the
vsreed 15 wstte of power at a gists; nt current of one ampere.
Le with the specified output of 15 watts. -also,, speci. 'iea:-
a called for the HG-3 to be in a package with dimensions of
2 x 4 x 8 inches and to weigh under 8 pounds. The model of the -3
demonstrated was of the dimensions called for end weighed 5.75 pounds.
3. This model of the HG-3 utilised timing belts, rather than
gears, in three stages to give a speed ratio of 30t1.. After cranking
the belt in the first stage had a tendency to slip.
6660stated, however, that this problem would be overcome by
replacing the belt in the first stage with gears. This change will,
b
e
de within the next 3 weeks and the generator will then
delivered for evaluation.
4. Other than the slipping of
HG-3 is generally an acceptable item.
is well ahead of schedule for expending
believes that an additional prototype can be constructed to rurt.ner
approach ._is~to~ make the case of plastic, thus lowering the losses due
to eddy currents through the present aluminum case. In the present
del, the generator itself is approximately 95% efficient and the
overall efficiency is about . At best, the overan efficiency
could be raised to 88 or 90% with the eority of the losses in the
electronic circuit r7.
Approved For Release 2000/09/11: CIA-RLR . - 0A000500020049-1
 Approved For Release 2000/09/11: CIA-R
000500020049-1
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5. It is conceivable that the HG-3
sealed nickel -cadmium batteries. Since the generator is a consti; nt
,, the voltage wM not exceed a val
the battery until the final phase of the charge.
descent lamp as an indicator ich i.1h tes when the bat
charge,, the operator will be able to stop charging before
erp becomes dashed. The contractor was asked to pro
2t4 a hour, 12--volt, sealed-call battery (Sonotone size D) and
perform tests with the HG-3 to determine the feasibility of charging
this typo of battery.
Distributions
R&D Subject File
--; thly Wort
R Lob
OC-T
EP r::no
flD E/R&D-EP/cWS:wlj (19 March 1959)
Approved For Release 2000/09/11: CIA-RDP78-0282OA000500020049-1