Conference Report - Hand Crank Generator, HG-3

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Document Creation Date: 
November 17, 2016
Document Release Date: 
March 10, 1998
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Publication Date: 
March 20, 1959
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PDF icon CIA-RDP78-02820A000500020049-1.pdf130.78 KB
25X1A9a 25X1,A5a1 25X1A9a 25X1A5a1 25X1A5a1 Approved For Release 2000/09/11: CIA-R LWIMIM The Mae - RD-1 T.O. 4 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 Iw 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