AFTER DEPARTING W66 NBOUND; C170 FAILS TO ACCOUNT FOR WIND AND ENTERS DC ADIZ ATTEMPTING TO VALIDATE POS WITH CSN VORTAC.

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DEPARTED RWY 14 AT W66 WITH A STANDARD XWIND DEP TO THE NNE. AFTER CLRING THE ATA (APPROX 2 MI NE OF THE ARPT); I TURNED NW TOWARDS WARRENTON. OPERATING UNDER VMC AND PILOTAGE NAV; I PROCEEDED TOWARDS THE VISUAL LANDMARKS 7 MI TO THE NW. INTERMITTENT CLOUD SHADOWS OBSCURED MY NAV REF POINT PERIODICALLY; SO I BEGAN TO TUNE TO THE CSN VOR TO GET A MORE ACCURATE BEARING SO THAT I WOULD REMAIN CLR OF THE ADIZ. BEFORE I WAS ABLE TO PINPOINT MY POS WITH VOR NAV; I REALIZED I HAD DRIFTED INTO THE ADIZ BY APPROX 2 MI. I IMMEDIATELY TURNED SW TO EXIT THE ADIZ. THE APPARENT LACK OF GND REF POINTS TO DEFINE THE ADIZ; MY LOW ALT AND A VERY STRONG SW WIND PROBABLY CAUSED MY TRACK TO DRIFT MORE QUICKLY INTO THE ADIZ. SINCE I AM BASED IN THE LCL AREA; I AM VERY AWARE OF THE ADIZ AND WAS CONCERNED ENOUGH TO PLAN MY RTE OF FLT TO REMAIN CLR OF THE AIRSPACE. I HAD FLOWN THIS PATH NUMEROUS TIMES BEFORE. SINCE I HAVE ONLY FLOWN TO THE NW USING PILOTAGE ONLY 2 OR 3 TIMES SINCE THE ESTABLISHMENT OF THE ADIZ; I CAN SEE NOW THAT IT'S ONLY SAFE TO EITHER GET ESTABLISHED ON A VOR RADIAL AFTER CLRING THE ATA OR TO PROCEED AWAY FROM THE ADIZ TO A KNOWN VISUAL CHKPOINT UNTIL PROPER WIND DRIFT AND COURSE CAN BE ESTABLISHED. I AM ALSO GOING TO TRY TO PURSUE A PROCEDURAL CHANGE AT THE ARPT TO ESTABLISH A NONSTANDARD R-HAND TFC PATTERN FOR RWY 14 AT W66. RIGHT NOW; A L-HAND DOWNWIND IS ONLY 2 NM FROM THE ADIZ AND A XWIND DEP PUTS YOU EVEN CLOSER.