Narrative:

I was cleared for takeoff on runway xxl with a vector of 290 after takeoff. Tower gave clearance for takeoff without delay and was issued immediately after a large jet landed and another jet on two mile final. Upon takeoff; at normal rotation speed (75 KTS); plane experienced extreme wake turbulence forcing plane to left. Correction was made for wake turbulence; however; combined with wind gusts and rain showers; plane was forced off of heading due to left roll and yaw. Control of plane was maintained at all times; however; after reaching normal climb attitude; heading was now 280 and correction to heading 310 was advised by departure. Later on in flight; while on course to abc intersection; I was asked what heading was issued to me before takeoff and I responded 280 and corrected to 310 per departure. My FMS was set for 290 however I was hand flying plane for best control and on a 280 heading. This heading deviation was inadvertent and corrective action was immediately initiated once in normal climb attitude beyond effects of wake turbulence and wind gusts. I was advised when I returned home to call TRACON. I was advised at that time that I was involved in an incident. In retrospect; as PIC; I should have requested to wait for greater separation for takeoff due to the workload imposed from wake turbulence; wind gusts; and significant rain showers. Additionally; since the tower was giving me preference for takeoff as an angel flight; I wanted to comply without unnecessary burden to inbound and outbound flts. Unfortunately; this contributed to the immediate departure and thus the wake turbulence and added workload. Once again; waiting and requesting for greater separation would have eliminated this incident.

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Original NASA ASRS Text

Title: BE36 PLT ON ANGEL FLT ENCOUNTERS WAKE TURBULENCE ON TKOF CAUSING A TRACK DEV FROM ASSIGNED DEP HEADING. EXPEDITIOUS HANDLING BY LCL CTLR MAY HAVE CONTRIBUTED TO THE WAKE ENCOUNTER.

Narrative: I WAS CLRED FOR TKOF ON RWY XXL WITH A VECTOR OF 290 AFTER TKOF. TOWER GAVE CLRNC FOR TKOF WITHOUT DELAY AND WAS ISSUED IMMEDIATELY AFTER A LARGE JET LANDED AND ANOTHER JET ON TWO MILE FINAL. UPON TKOF; AT NORMAL ROTATION SPEED (75 KTS); PLANE EXPERIENCED EXTREME WAKE TURBULENCE FORCING PLANE TO L. CORRECTION WAS MADE FOR WAKE TURBULENCE; HOWEVER; COMBINED WITH WIND GUSTS AND RAIN SHOWERS; PLANE WAS FORCED OFF OF HEADING DUE TO L ROLL AND YAW. CONTROL OF PLANE WAS MAINTAINED AT ALL TIMES; HOWEVER; AFTER REACHING NORMAL CLB ATTITUDE; HEADING WAS NOW 280 AND CORRECTION TO HEADING 310 WAS ADVISED BY DEP. LATER ON IN FLT; WHILE ON COURSE TO ABC INTXN; I WAS ASKED WHAT HEADING WAS ISSUED TO ME BEFORE TKOF AND I RESPONDED 280 AND CORRECTED TO 310 PER DEP. MY FMS WAS SET FOR 290 HOWEVER I WAS HAND FLYING PLANE FOR BEST CONTROL AND ON A 280 HEADING. THIS HEADING DEV WAS INADVERTENT AND CORRECTIVE ACTION WAS IMMEDIATELY INITIATED ONCE IN NORMAL CLB ATTITUDE BEYOND EFFECTS OF WAKE TURBULENCE AND WIND GUSTS. I WAS ADVISED WHEN I RETURNED HOME TO CALL TRACON. I WAS ADVISED AT THAT TIME THAT I WAS INVOLVED IN AN INCIDENT. IN RETROSPECT; AS PIC; I SHOULD HAVE REQUESTED TO WAIT FOR GREATER SEPARATION FOR TAKEOFF DUE TO THE WORKLOAD IMPOSED FROM WAKE TURBULENCE; WIND GUSTS; AND SIGNIFICANT RAIN SHOWERS. ADDITIONALLY; SINCE THE TOWER WAS GIVING ME PREFERENCE FOR TAKEOFF AS AN ANGEL FLIGHT; I WANTED TO COMPLY WITHOUT UNNECESSARY BURDEN TO INBOUND AND OUTBOUND FLTS. UNFORTUNATELY; THIS CONTRIBUTED TO THE IMMEDIATE DEP AND THUS THE WAKE TURBULENCE AND ADDED WORKLOAD. ONCE AGAIN; WAITING AND REQUESTING FOR GREATER SEPARATION WOULD HAVE ELIMINATED THIS INCIDENT.

Data retrieved from NASA's ASRS site as of May 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.