Replacement Skidtube with Run-on Landing Wearplates Fits LH or RHWe believe that conventional skidtubes are under designed for the types of landings most helicopters encounter. Conventional skidtubes are ill equipped to face the critical loading conditions encountered when landing on uneven ground. Under these conditions, simple round tubes tend to puncture, dent and bend because they cannot maintain their shape. DART Aerospaces revolutionary patented Round I Beam technology combines the conventional round tube