A C152 CFI RPT ON AN OFF ARPT EMER NIGHT OP LNDG NEAR TX05; TX.

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THE FIRST THING I DID WHEN ME AND MY STUDENT LANDED WAS FUEL THE AIRPLANE AND WENT UP TO DO SOME TOUCH-AND-GOES -- ABOUT 4. WE LANDED AT THE SAME ARPT AND WE REFUELED THE AIRPLANE AGAIN; AND LEFT THE ARPT DIRECT TO ADS. THE WINDS ALOFT WERE: 3000 FT; 180 DEGS AT 19 KTS GUSTING TO 29 KTS; 6000 FT; 190 DEGS 15 KTS GUSTING TO 25 KTS; AND 9000 FT; 180 DEGS 10 KTS. SO I DID THE FLT PLAN TO GO TO ADS AT 8500 FT ALT. THE FIRST CHK POINT WAS SMITH AND IT TOOK ME 25 MINS TO CLB TO 8500 FT AND REACH MY FIRST CHK POINT AT THE SAME TIME; WHICH WAS 25 NM; GS 55; FUEL 2.8. THE NEXT CHK POINT WAS ROBERT S KERR. IT TOOK FOR ME 41 NM; AND TIME 25 MINS; GS 72; FUEL 2.5. THE THIRD CHK POINT WAS MCCALLISTER. IT TOOK FOR ME 46 NM; 35 MINS; AND GS 72; FUEL 3.5. THE FOURTH CHK POINT WAS THE HWY. IT TOOK ME 23 NM; 15 MINS; GS 72; FUEL 1.5. THE FIFTH CHK WAS DURANT. IT TOOK ME 36 NM; 28 MINS; GS 72; AND FUEL 2.8. THE NEXT ONE WAS SHERMAN. IT TOOK ME 21 NM; 15 MINS; GS 72; FUEL 1.5. THE NEXT CHK POINT WAS MCKENNY. IT TOOK ME 30 NM; 21 MINS; GS 72; AND FUEL 2.1. THE LAST CHK POINT WAS THE DEST -- 18 NM; 12 MINS; GS 72; FUEL 1.2. THAT WAS MY FLT PLAN. WHAT HAPPENED IS THAT BTWN SHERMAN AND MCKENNY; 10 MINS PAST SHERMAN; HOBBS READING 2.2. I HAD ROUGHNESS IN THE ENG AND I STARTED TO LOSE A LOT OF RPM. I FOLLOWED MY CHKLIST TO MAKE SURE THAT EVERYTHING WAS WORKING PROPERLY BTWN THE MIXTURE AND FUEL SELECTOR. I STARTED TO JACK WITH THE THROTTLE AND I KEPT GLIDING AND HOLDING MY BEST GLIDE SPD; AND I DECIDED TO DIVERT TO MCKENNY BECAUSE I GOT NO CHOICE; ESPECIALLY SINCE I WAS IN THE MIDDLE OF SHERMAN AND MCKENNY. SO I MADE IT UP TO 1/4 MI FROM THE TOUCHDOWN. I AM SAFE AND MY STUDENT IS SAFE; TOO. ABOUT MY CALCULATION; I'M SUPPOSED TO FLY FROM VBT BENTON VELL; AR; TO ADS; TX; 2 HRS AND 50 MINS WITH 180 DEGS 10 KT WINDS AT 8500 FT; AT THE SAME TIME KEEPING RESERVE FUEL.