Attainment of a Straight-Line Trajectory for a Preset Guided Missile With Special Reference to Effect of Wind or Target Motion Page: 2 of 12
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MR No. L5M21b
NATIONAL ADVISORY07 COMMITTEE FOR ERONALTTIC
MEMORANDUM REPORT
for the
ir technicall Service Command, Army Air Forces
ATTAINMENT OF A STRAIGT-LIN TRAJEC : TORY FOR A PRESET
GUIDED MISSILE 'WITH SPECIAL REERENCE TO EFFECT OF WIND
OR TARGET' NOTION
By Herbert S. Ribner
SUMMARY
A study is made of the requirements for the attainment
of a strai.ght-line trajectory for a preset guided missile
in the presence of wind or target motion. The analysis
indicates that: (1) the straight-line trajectory'that will
hit a target is a path that is straight relative to axes
fixed in the target, but not necessarily straight relative
to axes fixed in tlhe air; (2) the launching airplane
should itself he on a straight-line collision course in
order to establish the ritht direction of launching and
the right intelligence for the preset guided missile;
(3) the straight-line collision course is characterized by
a constant airection in space for the line of sight to the
target (termed infinite navigation); and (4) the automatic
pilot in the missile should be arranged to oppose any
acceleration normal to a direction established by the line
of sight at launching, but any desired acceleration may
be permitted parallel to the line of sight.
A simplee bombsight mounting is proposed whereby the
pilot of the launching airplane can attain the desired
straight-line collision course by flying the airplane so
as to keep the target on the crosshairs. Recorrendatlon
is made bhat this bombsight mechanism be const-ructed and
tested in flight.
INTRODUCTI ON
It has been thought that bombing technique would be
simplified in the extreme by arranging the missile to
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Ribner, Herbert S. Attainment of a Straight-Line Trajectory for a Preset Guided Missile With Special Reference to Effect of Wind or Target Motion, report, August 1945; (https://digital.library.unt.edu/ark:/67531/metadc62433/m1/2/: accessed April 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.