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3.?"-ORET
it ±8 impossible' o to predetermine the time at which the combustion ,should. .be stopped.for.any
.given.range . The Only way to increase the range accuracy of the missile
is, therefore ., to cut off the fuel combustion NOT at a time set in advance,
but only after the - missile attains a definite velocity, calculatedin advance.
This, in turn, can be deduced through the well-known integration formula by coneidering
the ,aooploration at the moment of each explosion, i.e., at the instant
or. each . forward thrust of the miesile. P.
a) Principles Involved
In iource l s device, the thruit of the missile at the instant of the explosion
is transformed into a direct current , which is 'proportional to this forward . thrust
This current is directed through an electrolytic condenser previously charged
with a capacity caloulated . to correspond to the velocity of the missile at . which
the fuol combustion is to be stopped. During tho flight of the missile, the generated
current builds up a charge equalizing that of the condenser. As soon as
the charge thus built up reaches the proportion of the condenser ohargo the resulting
rupture of voltago operates a mochanical devico which stops the fuel colmbustion.'
• b) Operation (See Schematic Diagram, Appendix)
A rotating coil B is placed in the magnetic field A. In front of the coil,
and placed eccentrioally with it, is a copper plato C, which, in turn, is plaood
in the contor of the field originatod by two coils, D' and D u , through which .
passes an induction current of 500 cycles.
• - When, the missile is given a forward thrust at the instant of each oxploeion,
the Mass of the ooppor plate 0 tends to move. By doing so, tho plato disturbs
the constant magnotic field crpatod by tho collo D' and D. The current created
in the and D' I originates in thesecondary of the transformor E an alternating
. qurrent which is appliod to thp grid of tube R i . This current flows
through the transformer'? into the copper oxido roctifipr G, and from here, as
(pulsating) D.0, 'it ohargos spooial oloctrolytio condenser H and nowt back to
the rotating coil B. Hero it uroatos a rupture of voltage which nullifies tho
original,offeat of thp forward thrust of the missile on the copper plate O.
• ' . As soon a the curront flowing through the valve H b000mos equal to the prodetorminod
charge storod thoro, a discharge of voltage occurs, which is impressed
on tho • grid - of tube Ris.
. A rolay J, placed in the plate circuit of tuba R 11 , is operated by this grid
reaction and, in turn, oporatos the mochanieal device which steps the fuol combustion,.
PW states that an accuracy of .001 is obtained by this dovice.
In order to charge tho oloctrolytic condonsor H, sourco developod . an instrument
(KONTAXTUHR) whioh operated on a 50-cyolo current. This spocial current was
created by a buzzer working on 50 cyclos, also dovolopod by source.
13 April 1945. SEVENTH ARMY INTERROGATION CENTER
/171L„,e
PAUL KUBALA, Maj, MI, A
Commanding.
SECRET
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