Tortilla flats bicycle ride1/28/2024 ![]() I stood outside and watched him for several minutes. Once the plane passed by, the propeller sound abated and you could hear the rumble of the piston engine. ![]() When they are exceeding the speed of sound, they create sound of their own. The speed of the propeller tips can be very high. Speed is defined as distance traveled in a period of time. This means the tips have to cover a greater distance for a given RPM. Although the entire propeller is turning at that RPM, the tips of the propeller are describing an arc of greater diameter than any other part of the propeller. The propeller is turning at a certain number of revolutions per minute (RPM). This phenomenon is hard to get your head around. The tip speed of the propeller was exceeding the speed of sound and creating a shock wave. He continued on that heading until he was almost out of sight before he rolled into another 180-degree turn and passed overhead again.Īs he approached the park, his plane sounded like a buzz saw. He would pass over the RV park in a northeasterly direction, then roll into a steep bank as he made a 180-degree turn to the southwest. Last week, there was a pilot roaring overhead – he appeared to be practicing for a pylon race. I really enjoy watching these piston-powered airplanes. Three Russian Yak 52s and an AT-6 Texan flew overhead in tight formation a couple of times. There were airplanes from Falcon Field putting on an aerobatic display to the west of us. ![]() The tune-up with new cables, chain and cassette and new wheels have restored the liveliness of her Trek Madone.Īfter her ride, we hung out at the pool for a while and soaked in the Jacuzzi. She rode the Usery loop, 20 miles, with her friends, Dara and Amber and a few other gals. She was away for a week and her bike was in the shop for repairs. Donna went out for her first bike ride in two weeks. Not that the weekend was all that exciting. I didn’t post yesterday, so I need to post a weekend update.
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