COAST ARTILLERY, JOURNAL - Air Defense Artillery

COAST ARTILLERY BOARD NOTES
COMmzuzications relatin, to the development or improvement in methods Or 'l7l4tenel JOT the Cout
Artillery will be welcome from any member of the Corps or of the Service at laTl.e. These communi ..
cations, with models or drowinK$ of devices proposed. may be sent direct. to the Coast Artillery BOIlTd,
FOTt Monroe, YiT&inia, and will receive careful consideration. R. S. ABlCKNETHY, Colonel, COa3t A.rtil.
lery Corps, President Coast Artillery Board.
Projects Initiated During the Month of October
Project No. 494, Sound Lag Computer.-Captain Albert M. Jackson, 62d
Coast Artillery, has designed and constructed a sound lag computer to furnish
cOlitinuous data, i. e., apparent sound lag; predicted sound lag; predicted elevation;
and the correction due to temperature refraction. This device is now under
study by the Coast Artillery Board.
Project No. 495, Modification of Elevation and Correction Pointers on
Antiaircraft Sights for Three.inch Antiaircraft Guns, Models 1917 and 1918.-
A modification of the sight for 3.inch antiaircraft guns has been made at Frankford
Arsenal and is being forwarded to the Coast Artillery Board for test.
Project No. 496, Antiaircraft Fire Control Telephone Unit as Installed at
Aberdeen Proving Ground.-This is an assembly of the fire control telephone
made up at the Signal Corps Laboratory in accordance with the recommendations
made in Coast Artillery Board Project No. 371. The Coast Artillery Board
has this unit under study and will submit recommendations to the Chief of Coast
Artillery covering the suitability of the unit, together with any changes believed
necessary to make it satisfactory.
Project No. 497, Test of Homelite Portable Charging Set and Ward
Leonard Charging Panel for Sound Ranging Service.-This is a report of a test
conducted by the First Sound Ranging Battery, referred to the Coast Artillery
Board for remark and recommendation. The report is now under study by the
Board.
Project No. 498, Predictor.-A predictor, claimed to be universal, and used
by the 55th Coast Artillery in its recent service practice, has been referred to the
Coast Artillery Board for test and recommendation.
Project No. 499, Program for Test of Long-Range Lewis D. P. F.-
The Coast Artillery Board has been instructed to prepare and submit to the Chief
of Coast Artillery a program for test of the new type Long-Range Lewis Depression
Position Finder.
Project No. 500, Test of SCR-77-B (Short-Range Radio Receiving Set).-
In accordance with recommendations made by the Coast Artillery BolEd in its
Project No. 394 and subsequent correspondence, the Board has been furnished
three SCR-77-B Radio Sets for test to detennine whether they will meet the
requirements for easily transportable, short-range radio telegraph sets for use
with distant subposts of the antiaircraft information service that cannot conveniently
be included in the telephone net.
[5741