Narrative:

I departed rbd with the intention of a destination of sep. After initiating the rollout for takeoff; my engine monitor system began altering illumination bright and low intensity. Not concerned with this behavior; due to the surface of the airport; I continued to rotate at vr 95 KTS. After positive rate of climb and standard altitude; I retracted my takeoff flap setting. At this time 1/2 the radio equipment went inoperative. Concentrating my efforts on management of the aircraft and necessary surroundings; I retracted my gear. At this time; I heard the hydraulic pump engage. This is when I lost all electrical power and partial gear retraction. Immediately I turned back to the airport and began to troubleshoot and squawk 7600 for emergency. With no radio equipment working; I'm sure that tower was unable to read my transponder. I then resorted to secondary manual hydraulic system and waited for light gun signals. At this time; I was set up for a left base leg for runway 31 and proceeded to land. At this time; I exercised caution for any other traffic in the vicinity. There was no one else in the pattern; so I then taxied clear of runway where I waited for any acknowledgement from tower. After waiting and no response; I then exercised extreme caution and taxied to park. After shutdown; I called the tower on the phone and apologized for any trouble or question. In determining the aftermath; my alternator had failed on rollout for takeoff. My FMS failed to provide any indication due to a delayed system of every 20-30 seconds. By the time it would have set off a low voltage alert; my hydraulic pump and all radio equipment and lights drained the battery. No damage was caused and all parts were replaced with factory new. The alternator had approximately 200 hours since new. I maintained safety of flight and landed safely.

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Original NASA ASRS Text

Title: HIGH PERFORMANCE HOMEBUILT SUSTAINS ALTERNATOR FAILURE ON NIGHTTIME TKOF.

Narrative: I DEPARTED RBD WITH THE INTENTION OF A DEST OF SEP. AFTER INITIATING THE ROLLOUT FOR TKOF; MY ENG MONITOR SYS BEGAN ALTERING ILLUMINATION BRIGHT AND LOW INTENSITY. NOT CONCERNED WITH THIS BEHAVIOR; DUE TO THE SURFACE OF THE ARPT; I CONTINUED TO ROTATE AT VR 95 KTS. AFTER POSITIVE RATE OF CLB AND STANDARD ALT; I RETRACTED MY TKOF FLAP SETTING. AT THIS TIME 1/2 THE RADIO EQUIP WENT INOP. CONCENTRATING MY EFFORTS ON MGMNT OF THE ACFT AND NECESSARY SURROUNDINGS; I RETRACTED MY GEAR. AT THIS TIME; I HEARD THE HYD PUMP ENGAGE. THIS IS WHEN I LOST ALL ELECTRICAL PWR AND PARTIAL GEAR RETRACTION. IMMEDIATELY I TURNED BACK TO THE ARPT AND BEGAN TO TROUBLESHOOT AND SQUAWK 7600 FOR EMER. WITH NO RADIO EQUIP WORKING; I'M SURE THAT TWR WAS UNABLE TO READ MY XPONDER. I THEN RESORTED TO SECONDARY MANUAL HYD SYS AND WAITED FOR LIGHT GUN SIGNALS. AT THIS TIME; I WAS SET UP FOR A L BASE LEG FOR RWY 31 AND PROCEEDED TO LAND. AT THIS TIME; I EXERCISED CAUTION FOR ANY OTHER TFC IN THE VICINITY. THERE WAS NO ONE ELSE IN THE PATTERN; SO I THEN TAXIED CLR OF RWY WHERE I WAITED FOR ANY ACKNOWLEDGEMENT FROM TWR. AFTER WAITING AND NO RESPONSE; I THEN EXERCISED EXTREME CAUTION AND TAXIED TO PARK. AFTER SHUTDOWN; I CALLED THE TWR ON THE PHONE AND APOLOGIZED FOR ANY TROUBLE OR QUESTION. IN DETERMINING THE AFTERMATH; MY ALTERNATOR HAD FAILED ON ROLLOUT FOR TKOF. MY FMS FAILED TO PROVIDE ANY INDICATION DUE TO A DELAYED SYS OF EVERY 20-30 SECONDS. BY THE TIME IT WOULD HAVE SET OFF A LOW VOLTAGE ALERT; MY HYD PUMP AND ALL RADIO EQUIP AND LIGHTS DRAINED THE BATTERY. NO DAMAGE WAS CAUSED AND ALL PARTS WERE REPLACED WITH FACTORY NEW. THE ALTERNATOR HAD APPROX 200 HRS SINCE NEW. I MAINTAINED SAFETY OF FLT AND LANDED SAFELY.

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.