RPMÂ Landing Gear for the LaTrax Alias replaces the little rubber foot with a solidly mounted, curved "spring" made from our engineering grade, ultra-lightweight nylons. The curved "spring" adds impact-absorption to the air-frame, helping to reduce or eliminate damage from those questionable landings. Our Landing Gear also elevates the Alias an additional 0.8" (20mm), reducing the probability of a blade strike in grass or during bad landings.