I have a question regarding rotors. Has there ever been an inflight failure of a rotor blade? Especially the newer designs, like the Dragon Wings? Thanks.
Don Loftus
new member
Yes Don. There have been a few failures. Rare and sometimes hard to find the reason why.
Wood blades do not fail because they are made of wood. They fail because they were exposed to the outdoor elements for 30 years , soaked up water and sometimes a bit of rot started at the root end or attachment braces. Wood blade that are failing give lots of warning , but if the helicopter has no life limit blades , and rely upon inspection, and the helicopter has been flying in tropical Guiana for 40 years ..... what is one more flight going to hurt with those fasteners all coming loose since last year..... that is when it can happen.
Modern metal bonded blades fail on occasion. Not because of the design , the design is usually good. Bonding adhesives used on rotor blades are proven and are an excellent way to fasten metal to metal. Problems with de-bonding are usually blamed on "quality control" which means the two part epoxy was not cured at the right temperature , material was not cleaned properly, or the assembler had a hangover that day.
Modern composite blades are becoming the industry standard. Composites are glorified high-end fiberglass construction using the best available materials. Blades can be shaped and formed in a "perfect mold" with a "perfect aerodynamic shape" and hundreds can be produced all exactly the same which is highly desirable in the industry. But they do fail as well. Quite rare , but it always comes down to cure times and temperatures and quality control. Failures are usually traced back to an inclusion or un-cured part of the laminated lay-up process that is hard to prove when the blade and aircraft is busted up on the ground.
Welcome to the forum Don , You have asked a good question. My response is mostly about helicopter rotors. It is rare to have an in flight failure but it can happen. Gyroplanes very seldom have in flight rotor blade failures. It is not an issue. As a matter of fact I do not know of one. For sure , never heard of a Dragon Wing rotor failing in flight. Somebody correct me if I am wrong.
Many thanks
Arnie.