| http://www.w3.org/ns/prov#value | - I now have the 550 flying and am pleased with the way it performs.However there are a few issues that potential buyers should pay particular attention to.I always like to spin the heli without blades to check vibration,and after the second time my tailshaft bearings collapsed which is strange when hk state that they are high tolerance bearings.The tail boom support rods came out of there sleeves,a
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