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