Cessna 210 question, vertical speed at best glide?

Discussion in 'Flight Following' started by exncsurfer, Oct 5, 2020.

  1. exncsurfer

    exncsurfer Pattern Altitude

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    The Cessna 210 crash thread was locked so I'll make a new thread to ask this. I noticed that one of the frames of video shows the vertical speed indicator and that made me wonder, what would the typical vertical speed at power off best glide be in a 210? I know it would vary by weight and density altitude, etc. But what would the ballpark be? From the video it looked like his vertical speed was approaching -1000 ft/min.

    upload_2020-10-5_11-35-41.png
     
    Last edited: Oct 5, 2020
  2. MauleSkinner

    MauleSkinner Final Approach

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    Depending on the airspeed, that could be correct.

    if you assume a 12:1 or so glide ratio, 100 KIAS glide speed would result in a little over 800 fpm, whic they appear to be doing. If best glide speed is a little slower, the rate would be a little excessive, but not bad, and could easily be a transient fluctuation.
     
  3. exncsurfer

    exncsurfer Pattern Altitude

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    Thanks for the reply. Yeah, I tried the trig method, calculating at a best glide of 85Knots as the hypotenuse and a ratio of 9.5 to 1 (a six degree flight path), I came up with 890 fpm, so his vertical speed appears to be what you might expect to see.
     
  4. Tokirbymd

    Tokirbymd Pre-Flight

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    I’ve seen 1500fpm on my pa32 doing power off 180s. But it doesn’t tend to pitch nose down in a stall, will just mush flat. FWIW cirrus under a chute has a similar descent rate but fear and seats are designed to take up the shock.
     
  5. MauleSkinner

    MauleSkinner Final Approach

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    So fear is a good thing in a Cirrus? ;)
     
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  6. benyflyguy

    benyflyguy En-Route

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    So I watched that vid for the first time. I guess I missed it before the lock.
    Just crazy- seemed like they had tons of options. I don’t get why. But I have never been in that situation. I would only hope that I would react using training rather than willing the plane to fly longer.
    I agree with some ppl who stated probably trained light with a CFI. Never at max gross. That changes the numbers quite a bit.
     
  7. Sinistar

    Sinistar En-Route

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    i would think it would be over 1000fpm. Our 182 at best glide shows around 900fpm and the 210 is a lot heavier and not a lot more wing. But then again with gear pulled in maybe its better. I wouldn't think any Cessna but a TTx would have a real glide ratio past 10:1 (prop windmilling).
     
  8. dmspilot

    dmspilot En-Route

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    Need to know the airspeed to determine the glide ratio. The descent rate will actually be less at airspeeds well below best glide, before increasing again.
     
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  9. Tantalum

    Tantalum Final Approach

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    I'm glad someone brought this back up, I was sad the first thread I started got locked since we didn't get to really dissect what actually happened here. Paul Bertorelli just did a really good write-up on this accident

    http://www.avweb.com/insider/when-youtube-clickbait-actually-has-value/

    Priceless
     
  10. genna

    genna Cleared for Takeoff

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    This crash has a weird connection for me. My wife follows one of the passengers on Instagram. So she was telling me about the crash and injuries long before this video ever appeared on YouTube. Evidently, the people were pretty open about it. Though also pretty clueless on pilots performance.

    When I saw the video, I immediately realized that this is the same crash she talked about.

    The guy in the right seat was severely injured, just left hospital maybe a week ago. May not walk again. Lots of face bones broken. Pilot was also injured, but not as bad. All other passengers- minor injuries
     
  11. exncsurfer

    exncsurfer Pattern Altitude

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    I assume you meant 'gear and seats'. The chute engineered crash is a vertical speed with no forward speed though.

    I was looking through all the photos for ground cars, I can't really see any, but there aren't any good shots from above. The pilot said in his recap video that he slid ten feet. Seems like it dug in pretty quick.
     
    Last edited: Oct 6, 2020
  12. exncsurfer

    exncsurfer Pattern Altitude

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    Yeah, I used 85knots to get 890 fpm. I guess the vertical speed isn't so important as long as you have enough lift to get it to zero before you make contact.
     
  13. Tokirbymd

    Tokirbymd Pre-Flight

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    I watched the video. Haven’t read pilots description but did read Paul Bertorrelis article. He seems to blame it on stalling at low altitude. Although the stall horn was blaring I can’t see if that was the case. My question is, if the ground is soft or rough enough would even a controlled landing with gear down have the same result? I fly fixed gear so don’t have the luxury of deciding gear up or down.
     
  14. SoonerAviator

    SoonerAviator Final Approach

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    I like it more the way he wrote it, lol.