PTS1 pilot justifies aerobatic noise from maneuvers in vicinity of 2wa4 airport.

Attributes
ACN	501090
Time
Date	200102
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : s46.tracon
State Reference	WA
Altitude	msl bound lower : 3000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : s46.tracon
Operator	general aviation : personal
Make Model Name	S-1 All Series
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 10 flight time total : 850 flight time type : 400
ASRS Report	501090
Events
Anomaly	other anomaly other
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance
Primary Problem	Environmental Factor

Narrative:

During legal aerobatic practice and as a result of noise from a fixed pitch propeller at 3200 RPM (high mach), noise carries a great distance and is sometimes presumed to be at a lower altitude by as much as a factor of 7.

Original NASA ASRS Text

Title: PTS1 PLT JUSTIFIES AEROBATIC NOISE FROM MANEUVERS IN VICINITY OF 2WA4 ARPT.

Narrative: DURING LEGAL AEROBATIC PRACTICE AND AS A RESULT OF NOISE FROM A FIXED PITCH PROP AT 3200 RPM (HIGH MACH), NOISE CARRIES A GREAT DISTANCE AND IS SOMETIMES PRESUMED TO BE AT A LOWER ALT BY AS MUCH AS A FACTOR OF 7.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.