ACFT MADE FORCED AUTOROTATIVE LANDING OFF ARPT IN A RESIDENTIAL AREA WHICH WAS CONGESTED. ACFT DEVELOPED A HIGH SINK RATE IN THE AUTOROTATION AND LANDED HARD. THE FORCED LANDING WAS DUE TO FUEL EXHAUSTION. 45 GALLONS OF FUEL WERE ADDED TO THE ACFT AT 1226 CST ON 9/13. ACFT WAS THEN FLOWN A TTL OF 3.3 HRS DURING 2 FLTS, ONE ON 9/13 AND THE ACCIDENT FLT. BOTH FLTS WERE FLOWN BY THE SAME PLT. OPERATOR RECORDS SHOW THAT A TELEPHONIC ORDER FOR 25 GALLONS OF FUEL FOR N49615 WAS CALLED IN AT 0943 ON 9/14. PLT STATED HE PLACED THIS ORDER THINKING IT WOULD FILL THE TANKS (75 GALLON CAPACITY). PLT DEPARTED DAL WITHOUT OBTAINING THE FUEL AND ARRIVED AT ADS AT 0950 WHERE HE RELATED THAT THE ACFT HAD NOT BEEN FUELED. FUEL WAS ORDERED AT ADS BUT THE PLT CANCELED THIS ORDER WHEN PAX ARRIVED SO AS TO EXPEDITE DEPARTURE. PAX HEARD PLT REMARK ABOUT LOW FUEL AND SAW ONE FUEL GAGE NEAR 'E' BEFORE THE LOSS OF POWER.