Small aircraft pilot smells fumes then smoke just after takeoff.

Attributes
ACN	271825
Time
Date	199405
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : hao
State Reference	OH
Altitude	agl bound lower : 0 agl bound upper : 300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : mem
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff other other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 60 flight time total : 185 flight time type : 70
ASRS Report	271825
Person 2
Affiliation	Other
Function	observation : observer
Qualification	pilot : private
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

I had preflted, taxied, and run the engine up. I didn't notice anything wrong so I called on CTAF and proceeded to takeoff. At about 100 ft AGL I smelled fumes, at 200 ft AGL I saw smoke, at 300 ft AGL I banked the nose 45 degrees, turned back to the airport, paralleled the runway and made an emergency landing. Initially I thought it was an electrical fire so I pulled the master switch off. I realized this was not the problem so I turned it back on and called on CTAF announcing my emergency landing. I landed safely, and nothing was damaged, and no one was hurt. I determined that the fire was a result of a bird's nest that had been removed. When the owner removed the nest, some pieces had become lodged between the cylinders. These papers and straw caught fire causing the occurrence. I was unable to recognize this situation during preflight since I couldn't see or feel these articles. I do not see this as an extremely serious situation, but I have filed this report since the owner is reporting this to the NTSB.

Original NASA ASRS Text

Title: SMA PLT SMELLS FUMES THEN SMOKE JUST AFTER TKOF.

Narrative: I HAD PREFLTED, TAXIED, AND RUN THE ENG UP. I DIDN'T NOTICE ANYTHING WRONG SO I CALLED ON CTAF AND PROCEEDED TO TKOF. AT ABOUT 100 FT AGL I SMELLED FUMES, AT 200 FT AGL I SAW SMOKE, AT 300 FT AGL I BANKED THE NOSE 45 DEGS, TURNED BACK TO THE ARPT, PARALLELED THE RWY AND MADE AN EMER LNDG. INITIALLY I THOUGHT IT WAS AN ELECTRICAL FIRE SO I PULLED THE MASTER SWITCH OFF. I REALIZED THIS WAS NOT THE PROB SO I TURNED IT BACK ON AND CALLED ON CTAF ANNOUNCING MY EMER LNDG. I LANDED SAFELY, AND NOTHING WAS DAMAGED, AND NO ONE WAS HURT. I DETERMINED THAT THE FIRE WAS A RESULT OF A BIRD'S NEST THAT HAD BEEN REMOVED. WHEN THE OWNER REMOVED THE NEST, SOME PIECES HAD BECOME LODGED BTWN THE CYLINDERS. THESE PAPERS AND STRAW CAUGHT FIRE CAUSING THE OCCURRENCE. I WAS UNABLE TO RECOGNIZE THIS SIT DURING PREFLT SINCE I COULDN'T SEE OR FEEL THESE ARTICLES. I DO NOT SEE THIS AS AN EXTREMELY SERIOUS SIT, BUT I HAVE FILED THIS RPT SINCE THE OWNER IS RPTING THIS TO THE NTSB.

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.