Evening star. [volume] (Washington, D.C.) 1854-1972, 1956-01-11
Airport Chiefs Warn
Of Turbo-Jet Noise
CAA Meeting
ColIed to Hear
New Problems
BY CHARLES YARBRoUGH

The Airport Operators Coun-
tcil, representing 40 of the Ma.
tons largest airports, today de-
clared comnercial Jet aircraft.
without effective noise-reducing
devices. will not be acceptable
to the public"
The statement was made be-
fore a meeting of Civil Aero
lnautics Administration officials.
THE one-day meeting was being
theld in the Commerce Depart
lment Auditorium.
It was called by the CAA to
identify the problem which jet
taircraft will create when they
enter the commercial field in
about three years and to try to
find the answers.
The Airport Operators Coun.
Icil statement took up the noise
problem where earlier discussion
had left it. I'VE believe that the
Operation of such aircraft into
congested areas could jeopardize
the success of any program for
the use of turbo-jets," the state
ment said.
Admits High Noise Level
Earlier, one jet manufacturer
said that despite all testing TO-
date the noise level of one jet
prototype remains higher than
that of currently operating pis-
ton airliners. Another builder
said his company hoped to get
the noise level down to that Of
the bigger piston airplanes now
operating.
A polite hassle churned the
meeting slightly off-course when
Mayor William B. Hartsfleld Of
Atlanta, Ga, criticized the air.
lplane manufacturers for building
larger aircraft. Mayor Hartsfeld
wanted to know where these
cities will get the money to pay
| for airport expansion or the con.
struction of second airports.
He was answered to the effect
that the situation is merely one
of transportation progress.
Representatives Of Douglas.
Boeing and Lockheed Gold Of
efforts to At tomorrow's jet air
craft into today's airports.
Organ Ripe Developed
| Warren Dickinson Of Douglas
aircraft, said research and tests
have already brought about sic
able reductions in Jet noise but
even then the noise level 10
higher than the present air
planes"
He said that the exhaust is Of
such high velocity and Of such
tremendous quantity that q ire
mendous organ pipe is developed.
But" Mr.. Dickinson said, IT
you muzzle the noise you won't
have any thrust: If you don't
have any thrust you won't have
any take-off and If you don't
have any take-oh you won't
have an airplane."
! Don Beck of Boeing pointed
out that Jet engines require no
runup, will take of faster and
climb faster, therefore, reducing
the noise exposure at any one
point.
Strictly Probing Session
The one-day session, as CAA
Administrator Charles j. Lowen
admitted, is strictly probing
session. He explained that ct
this time the CAA has a lot Of
questions-"we don't know what
all the requirements will be-"
The question-and-answer Pc
riod brought out that as far as
ttake-off distance is concerned
most existing airports could
handle tomorrow's jets today.
For domestic flights the longest
Itake-off distance was given as
I6,700 feet. National Airport's
Longest runwey is just about
that length.
The question of weight, how
ever, is another matter. The new
Ijets, on domestic flights. will
weigh up to 100000 pounds.
lRunways, such as Nationals
Iare not built to handle such
weight.