NATIONAL BUREAU OF STANDARDS REPORT

NBS REPORT

364?

NBS PROJECT

0m*3O*23®3

0201-30-232$ July 1, 1954

OF n&tf*'£ v -M 4lH U /v*.., *i*i $

Prosftrea aoport

/.arch X, 1954 to Jim* 30, 1954

Fr#par«d by

F# c* Br#ek«arXdg«

3{kmuW*4 by

Airways jp&glnoerlog division

Civil Aoxmavtlea inistratioK

NBS.

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

The publication, rep Approved for public release by the

unless permission is Director of the National Institute of

25 ,d.c. Suchpern Standards and Technology (NIST)

cai iy prepared if th 0 n October 9, 2015

n part, Is prohibited

ndards, Washington

ort has been speclfijort for Its own use,
: -

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IMPROVEMENT OF VISUAL AIDS FOR AIR NaVIGaTIoK

PROGRESS REPORT 1.

OBJECTIVES

It is the purpose of this project to carry on research

and testing, develop specialized equipment and provide technical services for the Airways Engineering Division of the

Office of Federal Airways, Civil Aeronautics Administration,

2.

TESTING

At the beginning of the period covered by this report,

there were two tests in progress. These have been completed

and reported. During the report period six additional tests

have been requested. Five of these have been carried thru

and reported. Detailed dates and costs for each test are

given in the financial summary.

3.

RESEARCH ACTIVITIES

3»1 Study of exposure characteristics of metal protective

paints.

The accelerated exposures of the 2$ paint specimens

have been completed and a report on this part of the project

has been started. It is anticipated that the results will

be found sufficiently definite to warrant the discontinuance

of this part of the test. The natural exposures should be

continued for the coming fiscal year but this will entail

little expense except for a report at the close of the year.

3 • 2 Study of green plastics for beacon covers.

The results of the measurements made in the previous

period have been computed and analyzed and diagrams have

oeen prepared to show how the signal colors produced by the

plastics with light sources of different color temperatures

compare with the specification tele ances. The final report

on this project is nearing completion.

3

•

3 Study of optical system for traffic control projectors.

During the previous period candlepower distribution

measurements were made for a considerable number of lamp,

reflector, and lens combinations. This material was organized

into a report covering the characteristics of the projector

originally submitted for test, possible modifications of that

projector to i prove its performance, and the alternative of a

design using a very light weight plastic lens. The work was

then discontinued because developments within the C.A.A* made it

impossible to utilize the results in the foreseeable future.
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3.4 Jbanaardiaation of signal -light colors*

piagraKS were prepared to illustrate the text of Part 1

of the proposed standard for signal light colors and a conference arranged with representatives of the Eopp Glass Co.

and the Corning Glass Works. Some criticisms were offered

to the text but they were of a tentative sort and need not

preclude the use of this draft for wider circulation. The

diagrams proved inadequate and new diagrams are in process

of preparation. This is a joint project with the Bureau of

Aeronautics, that bureau carryin,, the major part of the cost

3.5 Technical service®.

This item includes correspondence, eonf erences, adiainis

trative reports and other general activities incident to the

conduct of the project. The costs for this period, include

the expenses involved in preparing the progress report for

the previous period.

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Financial summary » March 1, 1954 to June 30, 1954

C.A.A. fund 13341330.001

&.B.S. Project 0201-30-232#

Balance 2*20-54 (see last report) Jlu26

Supplementary transfer 600

Fund© available for period .#2226

Cost of tests

test Mo. Sate of Request date of Report Current Costs

General testing

G1524S 3-31-54 $39

•

Two fused rubber-covered connectors, tested electrically

and i&eeanic&lly for coafamity to specifications and suitability

for intended service.

G15259 3-23-54 4-13-54 70.

Radio antenna housing, measured for loss- tangent*

G15426 4-12-54 4-21-54 35.

Paint, tested for conformity to specifications,

G15505 5-7-54 5-12-54 127o0

Three portable A-G and D-G thermal voltmeters calibrated.

Project Tests

21A-10-53 11-16-53 3-12-54 155*

15 portable approach-light photometers calibrated,

furnished with calibration charts, and shipped,

Research Activities

3tudy^of^fX|0|u|e^characteristies of metal proStudy of green plastics for beacon covers. 310.

Study of optical system for traffic control

projectors, 216.

Standardisation ol specifications for signal colors. 19$.,

Technical services, ”30.1^

Final deficit

$2350.63

124.63
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Financial summary, March i> 1954 to June 30, 1954

C.A.A. Fund 13x1305.901

Project 0201-30-9303

Balance 2-28-54 (See last report) #2659

Cost of Tests

Test Ho* Date of Request Date of Report current, Costs

214-6/54 5-26-54 6-25-54 #231,

Radar irradiator, filter transmittance measured in visible

and ultra-violet regions, the conditions of use surveyed, and a

solution for control tower difficulties proposed*

21A-7/54 6-16-54 Incomplete 60*

fvo 100PAE-50 lamps measured for caadl ©power distribution*

Research Activities

Standardisation of specifications for signal colors

feci: nieal Services

Total for period

Balance available 7-1-54

90*

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