Im Not That Good

So I got into one of those internet discussions with other pilots about airplane performance. The focus was on a 2100-foot-long grass strip near sea level and how well a Bonanza would handle it. We didnt disagree on the typical Bonanzas ability to get in or out, but I think some people might be a bit more optimistic about such things than I am.

Joseph E. (Jeb) Burnside

Thursday, May 12, 2016 at 12:00 AM ET

Verified

Key Takeaways:

Aircraft POHs typically provide performance data only for dry, paved runways, making it difficult to accurately predict performance on grass, soft, or wet surfaces.
The author highlights a common over-optimism among pilots regarding aircraft performance on unpaved strips, contrasting book numbers with real-world variables like grass type and moisture.
To ensure safety on grass runways, the author advocates for conservative planning, such as doubling the published ground roll figures, to account for variable field conditions and average pilot technique.
This cautious approach is necessary because published "book" numbers are achieved by test pilots under ideal conditions and demand excellent technique, which may not be consistently met by average pilots.

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So I got into one of those internet discussions with other pilots about airplane performance. The focus was on a 2100-foot-long grass strip near sea level and how well a Bonanza would handle it. We didn’t disagree on the typical Bonanza’s ability to get in or out, but I think some people might be a bit more optimistic about such things than I am.

My home runway is 2500 feet, paved and (poorly) lighted. Even with three large men and near-full fuel aboard my C33A Debonair, I don’t need to use much braking to get down and slow to taxi speed by around 2000 feet. Heavier braking would easily see 1500-foot-long rollouts and, if I’m light, 1000-1250 feet is relatively easy, also, especially with some headwind.