Narrative:

While departing orl on a return flight to tlh, I called ground control and requested a VFR departure to the northwest at 4500 ft. Ground responded with a taxi clearance to runway 25 with no squawk assigned. I taxied out and contacted orl tower who cleared me for takeoff and on course. I took this to mean 'clearance as requested' with ground control and took off and began a climb to 4500 ft. Shortly after leaving 1600 ft, ATC called and advised that I had penetrated class B airspace without a clearance. I immediately descended back to 1500 ft. Maximum altitude attained during the excursion was 1900 ft. I failed to notice that orl tower did not control the airspace in the class B overlying orl. I needed to ask for clearance to enter the class B before entering. I usually fly IFR and am used to getting my clearance before departing. Need to refamiliarize with VFR.

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Original NASA ASRS Text

Title: A BE95 PLT CLBS INTO THE CLASS B AIRSPACE ABOVE ORL ARPT WITHOUT GETTING CLRNC FROM MCO APCH CTL.

Narrative: WHILE DEPARTING ORL ON A RETURN FLT TO TLH, I CALLED GND CTL AND REQUESTED A VFR DEP TO THE NW AT 4500 FT. GND RESPONDED WITH A TAXI CLRNC TO RWY 25 WITH NO SQUAWK ASSIGNED. I TAXIED OUT AND CONTACTED ORL TWR WHO CLRED ME FOR TKOF AND ON COURSE. I TOOK THIS TO MEAN 'CLRNC AS REQUESTED' WITH GND CTL AND TOOK OFF AND BEGAN A CLB TO 4500 FT. SHORTLY AFTER LEAVING 1600 FT, ATC CALLED AND ADVISED THAT I HAD PENETRATED CLASS B AIRSPACE WITHOUT A CLRNC. I IMMEDIATELY DSNDED BACK TO 1500 FT. MAX ALT ATTAINED DURING THE EXCURSION WAS 1900 FT. I FAILED TO NOTICE THAT ORL TWR DID NOT CTL THE AIRSPACE IN THE CLASS B OVERLYING ORL. I NEEDED TO ASK FOR CLRNC TO ENTER THE CLASS B BEFORE ENTERING. I USUALLY FLY IFR AND AM USED TO GETTING MY CLRNC BEFORE DEPARTING. NEED TO REFAMILIARIZE WITH VFR.

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.