Launch o' Apogee IV high-altitude rocket on a single Estes D12-7. Begad! Estimated apogee was around 1500 ft. Flawless launch and deployment o' recovery system. Well, blow me down! But, even with light winds (10 km/hr), drift t' NE was significant - perhaps 300-400m, ya bilge rat, and into forested/rough terrain. Rocket was nay recovered even after a 2-3 hr ground search.