281 What is Wrong about the 70-50 Takeoff Rule with Catherine Cavagnaro + GA News
Aviation News Talk – Pilot Stories, Safety Tips & General Aviation News
Glass Cockpit Publishing
4.8 • 730 Ratings
🗓️ 29 June 2023
⏱️ 56 minutes
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Summary
281 What's Wrong about the 70-50 Takeoff Rule with Catherine Cavagnaro + GA News
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Summary
281 Max talks with Catherine Cavagnaro about the Myth of the 70-50 takeoff rule and what's wrong with it. It seems that 70-50 rule is extracted from a basic but unrealistic model for aircraft takeoffs that ignores air resistance. The same model predicts her Bonanza will go supersonic shortly after takeoff. Even if the rule were valid, a pilot wouldn't rotate until the last inch of the runway.
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Advisory Circular 90-66C: Non-Towered Airport Flight Operations
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Transcript
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| 0:00.0 | Hello again and welcome to Aviation News Talk where we talk in general aviation with relevant news and flying tips for pilots and student pilots to help keep you safe. |
| 0:10.7 | I'm Max Prescott. |
| 0:11.8 | Today we'll be talking with math professor Dr. Catherine Kovagnaro about the so-called 70-50 rule that some pilots use to judge whether they'll be able to take off successfully. |
| 0:22.1 | And she'll explain why that rule is not all it's cracked up to be. |
| 0:26.6 | Last week in episode 280, we talked with members of the Alaska Air National Guard |
| 0:30.6 | about the rescue of two New York-based pilots who crashed high in the mountains in a Cessna 182. |
| 0:36.5 | So if you didn't hear that episode, you may want to check it out at Aviationnewstock.com |
| 0:40.6 | slash 280. |
| 0:42.3 | And so that you don't miss next week's exciting episode, go to whatever app that you're using |
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| 0:59.0 | for free. And this is a listener-supported show. So if you've ever learned something from this |
| 1:03.8 | show that's helped you become a safer pilot, or even to pass a check ride, think about what you |
| 1:08.8 | might pay a CFI for an hour of ground instruction, |
| 1:11.8 | and make a donation to help support the show. To do that, go out to AviationNewsdark.com |
| 1:16.8 | slash awesome to sign up to make a monthly donation, or to make a one-time donation, go to |
| 1:22.2 | AviationNewsdoc.com slash PayPal. And of course, those links are in the episode description |
| 1:26.9 | in the podcast app that you're |
| 1:28.3 | using to listen to the show. |
| 1:30.4 | Coming up in the news for the week of June 26, 2023, Jim Tweedo of the Flying Wild |
... |
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