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"Tony Cox" wrote in message ink.net...
"Dan Thomas" wrote in message om... "Tony Cox" wrote in message link.net... "Dan Thomas" wrote in message om... The only times I have heard of engine mounts failing on light airplanes is when a prop throws part of a blade, or maybe the whole blade on a constant-speed prop. The imbalance is more than enough to rip the engine off the airplane. Blades will fail when propeller nicks are left untreated and cracks develop. The prop is the most highly stressed bit of metal on the whole airplane, and THAT'S what pilots should be concerned about, not engine mounts. Nah. Properly designed engine mounts would never let that happen. Cessna 185 operated by JAARS Inc, South America, about ten years ago. Threw a blade and the engine tore off the mount before the pilot could shut it down. It turned sideways in the cowl, and the cowl was the only thing keeping it from departing entirely. The O-520 mount is a bed mount; if it had been the usual rear mounting the engine would have fallen off. What's a bed mount, Dan? I've always thought (hoped) that my 182 cowling would contain the engine. And there is always the fuel line, throttle cable, and battery cable as a last line of defense I couldn't trust a few wires and cables to keep the weight of the engine attached to the firewall. I spoke with a former 747 pilot who was into Formula 1 racing. He had a single-seat (Cassutt?) racer that used an O-200 turning a tiny prop at 4400 RPM to get the flat-out speed he wanted. I asked him about the prop failure/engine departure scenario, and he told me that he (and his buddies, in their airplanes) had a stout cable wrapped around the engine and bolted to the firewall to cover this eventuality. Apparently it had happened more than once before to other unfortunate racers. Dan |
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