Single engine pilot encounters another aircraft entering the runway during takeoff roll.

Attributes
ACN	689689
Time
Date	200603
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : gif.airport
State Reference	FL
Altitude	agl single value : 0
Environment
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff ground : takeoff roll
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : takeoff ground : takeoff roll
Person 1
Affiliation	other
Function	flight crew : single pilot
Experience	flight time last 90 days : 46 flight time total : 2050
ASRS Report	689689
Person 2
Function	oversight : pic
Events
Anomaly	conflict : ground less severe incursion : runway non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance Airport
Primary Problem	Flight Crew Human Performance

Narrative:

I was leaving an uncontrolled field. As I was pulling up to the hold line; I heard a plane entering on the 45 degree entry for the active runway. Shortly after he arrived downwind. I announced I was rolling onto the runway for an immediate departure. There was no other reported traffic and the runway was clear. As I was rolling on takeoff; the biplane came from an intersection. I was using full runway length of 5000 ft. The aircraft was on the roll right in front of me; but I didn't know his intentions so I throttled back. He then lifted off at a high angle of attack and turned left. My flight path was straight out. Since I knew the field well and knew I still had plenty of runway; I pushed throttle forward and continued my takeoff without incident.

Original NASA ASRS Text

Title: SINGLE ENG PLT ENCOUNTERS ANOTHER ACFT ENTERING THE RWY DURING TKOF ROLL.

Narrative: I WAS LEAVING AN UNCTLED FIELD. AS I WAS PULLING UP TO THE HOLD LINE; I HEARD A PLANE ENTERING ON THE 45 DEG ENTRY FOR THE ACTIVE RWY. SHORTLY AFTER HE ARRIVED DOWNWIND. I ANNOUNCED I WAS ROLLING ONTO THE RWY FOR AN IMMEDIATE DEP. THERE WAS NO OTHER RPTED TFC AND THE RWY WAS CLR. AS I WAS ROLLING ON TKOF; THE BIPLANE CAME FROM AN INTXN. I WAS USING FULL RWY LENGTH OF 5000 FT. THE ACFT WAS ON THE ROLL RIGHT IN FRONT OF ME; BUT I DIDN'T KNOW HIS INTENTIONS SO I THROTTLED BACK. HE THEN LIFTED OFF AT A HIGH ANGLE OF ATTACK AND TURNED L. MY FLT PATH WAS STRAIGHT OUT. SINCE I KNEW THE FIELD WELL AND KNEW I STILL HAD PLENTY OF RWY; I PUSHED THROTTLE FORWARD AND CONTINUED MY TKOF WITHOUT INCIDENT.

Data retrieved from NASA's ASRS site as of January 2009 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.