SMA LOST ENGINE FROM FUEL STARVATION AND MADE FORCED LNDG.

Narrative

BEFORE THE FINAL TRNING FLT OF THE DAY (#5) AND AFTER OBTAINING FUEL ON BOARD INFO FROM THE STUDENT; I CALCULATED 1.5 HRS FUEL REMAINING (AT 75% PWR) BASED ON AN EXPERIENCED FUEL BURN OF 7.5 GPH. WE PROCEEDED WITH THE LESSON AND BEGAN INBND AT 0.8 HRS HOBBS TIME. AT 0.9 HRS WE EXPERIENCED FUEL STARVATION; INFORMED APCH OF OUR INTENTIONS AND LANDED W/O FURTHER PROBS. BY USING INFO WHICH I DID NOT PERSONALLY VERIFY; I UNKNOWINGLY INVITED THE INEVITABLE. CONTRIBUTING FACTORS: INSTR PLT FATIGUE AND COMPLACENCY. ERRONEOUS JUDGEMENT: HIGH DENSITY ALT HELPED ME TO RATIONALIZE THAT LESS FUEL (WT) WAS DESIRABLE. HOWEVER; NOT VERIFYING FUEL LOAD WAS THE ULTIMATE CAUSE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: THE DIPSTICK THAT THE STUDENT USED WAS IMPROPERLY CALIBRATED; IT SHOWED MORE FUEL THAN WAS ACTUALLY IN THE TANK. THE REPORTER SET UP TO LAND ON A HARD-SURFACED ROAD. AT THE LAST MINUTE; AT ABOUT 100' AGL; HE NOTICED PWR LINES AND MADE A RIGHT TURN AND LANDED ON A 1200' LONG DRIVEWAY; TOUCHING DOWN ON THE LAST 300'. NO DAMAGE. ACFT WAS REFUELED AND FLOWN OUT THE SAME DAY. NO REPERCUSSIONS OTHER THAN TEASING FROM HIS PEERS.