Another example: airplanes. Take for example a Bellanca Decathalon with a 180 HP engine and constant-speed (variable pitch) prop. A very similar engine and propeller combination is used on certain Mooneys. Since the constant-speed prop gives both aircraft the ability to run at any "gearing" they choose, they should both capable of going 200 mph. Not so: while the Mooney is capable of close to 200 mph, the Decathalon can't go much over 100. Why? Because the Decathalon has a lot of stuff hanging out in the breeze, just like your '55.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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