A helicopter pilot has a close encounter with a v-tail bonanza while in ZZZ tower's airspace.

Attributes
ACN	618678
Time
Date	200405
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	Other
Make Model Name	Helicopter
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude
Route In Use	departure : vfr
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : zzz.tower
Make Model Name	Beechcraft, Beech Aircraft Corp Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	government other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 60 flight time total : 7000 flight time type : 4000
ASRS Report	618678
Person 2
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action
Miss Distance	horizontal : 400 vertical : 0
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance

Narrative:

Called ZZZ tower when taking off from ZZZ helipad. Departed to northwest with a left turn to the south. Advised tower of direction of flight. About 1-2 mins after departure, looked out at 2 O'clock position, to see a v-tail bonanza's at the same altitude, opposite direction. Traffic was never issued for either aircraft until that time. If I had made the left turn a few seconds later, it would probably have been a midair.

Original NASA ASRS Text

Title: A HELI PLT HAS A CLOSE ENCOUNTER WITH A V-TAIL BONANZA WHILE IN ZZZ TWR'S AIRSPACE.

Narrative: CALLED ZZZ TWR WHEN TAKING OFF FROM ZZZ HELIPAD. DEPARTED TO NW WITH A L TURN TO THE S. ADVISED TWR OF DIRECTION OF FLT. ABOUT 1-2 MINS AFTER DEP, LOOKED OUT AT 2 O'CLOCK POS, TO SEE A V-TAIL BONANZA'S AT THE SAME ALT, OPPOSITE DIRECTION. TFC WAS NEVER ISSUED FOR EITHER ACFT UNTIL THAT TIME. IF I HAD MADE THE L TURN A FEW SECONDS LATER, IT WOULD PROBABLY HAVE BEEN A MIDAIR.

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.