5 ms·

The METAR was 27028G35KT, or 28 gusting 35 from 270° magnetic However the runway landing was 33, or 330° magnetic. So this is 24-30kt crosswind component. The

The METAR was 27028G35KT, or 28 gusting 35 from 270° magnetic However the runway landing was 33, or 330° magnetic. So this is 24-30kt crosswind component. The maximum landing crosswind on a dry runway is 32kt. The press conference reported the runway as dry, so if they’re correct then it’s within limits. At the reported -9°c if the runway has been de-iced it could be dry I guess? The surveillance potato camera makes it look like a hard landing on the right main, which is mounted on the wing root. But it’s very low quality and we’re not going to get the first real answers for a month.

fransje26 2y ago
> However the runway landing was 33, or 330° magnetic. They were landing on runway 23. > At the reported -9°c if the runway has been de-iced it could be dry I guess? From the NOTAM, the runway condition codes for 23 were 5/5/5, so not dry, but "good". [1] https://avherald.com/h?article=52439b47&opt=1 https://avherald.com/h?article=52439b47&opt=1
- ericpauley 2y ago
  5/5/5 would still be good braking action and directional control (it’s out of 6).
  - fransje26 2y ago
    I stand corrected. 5 is not "poor", but "good", with a wet runway or one with light snow or slush. [1] [1] https://www.faa.gov/sites/faa.gov/files/about/initiatives/talpa/TALPA-Airport-RCAM.pdf https://www.faa.gov/sites/faa.gov/files/about/initiatives/ta...
- imoverclocked 2y ago
  FYI: Canadian runways use true north, not magnetic.
  - yello_downunder 2y ago
    I had to look this up, and I found the answer interesting because I used to develop software to accurately report magnetic declination at any point in time, for directional drilling oil wells in Canada. https://www.geomag.nrcan.gc.ca/mag_fld/magdec-en.php https://www.geomag.nrcan.gc.ca/mag_fld/magdec-en.php has some great information on why. For example, Yellowknife can experience declination changes over one degree every three years. I haven't used a compass since I was a kid and at that time declination where I live was 21 degrees. Now it's down to 13 degrees. I had no idea it changed that much.
  - tjohns 2y ago
    Depends if you're in Canada's "northern domestic airspace" or "southern domestic airspace": https://www.canada.ca/content/dam/dnd-mdn/images/technical-airworthiness/english/taa-2017-02-figure-1.jpg https://www.canada.ca/content/dam/dnd-mdn/images/technical-a... Airports in the southern half of Canada still use magnetic for runways.
    - imoverclocked 2y ago
      TIL!
      - capitainenemo 2y ago
        ... for now. Goal is to get everything on True within the next 5 years. https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20north.pdf https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20n... The global effort. https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth.aspx https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth....
cjrp 2y ago
The rule of thumb I was taught for crosswind component based on difference between runway heading and wind direction was 60º = 6/6 of the crosswind, 30º = 1/2, 10º = 1/6. So if they're landing on runway 23, 270/28 would amount to (roughly) 4/6 of the wind as a crosswind component, or 19kt.
- FabHK 2y ago
  90º = 6/6, 60º = 5/6, 40º = 4/6, 30º = 3/6, 10º = 1/6 strikes me as pretty accurate.
queuebert 2y ago
Doesn't look like a severe crosswind to me, because there seems to be very little crabbing or rudder input, although the camera angles make it hard to tell for sure. You can also see snow blowing on the ground roughly parallel to the runway. I would guess either a downdraft or they forgot to flare or both.

fransje26 2y ago

> However the runway landing was 33, or 330° magnetic. They were landing on runway 23. > At the reported -9°c if the runway has been de-iced it could be dry I guess? From the NOTAM, the runway condition codes for 23 were 5/5/5, so not dry, but "good". [1] https://avherald.com/h?article=52439b47&opt=1 https://avherald.com/h?article=52439b47&opt=1

ericpauley 2y ago
5/5/5 would still be good braking action and directional control (it’s out of 6).
- fransje26 2y ago
  I stand corrected. 5 is not "poor", but "good", with a wet runway or one with light snow or slush. [1] [1] https://www.faa.gov/sites/faa.gov/files/about/initiatives/talpa/TALPA-Airport-RCAM.pdf https://www.faa.gov/sites/faa.gov/files/about/initiatives/ta...
imoverclocked 2y ago
FYI: Canadian runways use true north, not magnetic.
- yello_downunder 2y ago
  I had to look this up, and I found the answer interesting because I used to develop software to accurately report magnetic declination at any point in time, for directional drilling oil wells in Canada. https://www.geomag.nrcan.gc.ca/mag_fld/magdec-en.php https://www.geomag.nrcan.gc.ca/mag_fld/magdec-en.php has some great information on why. For example, Yellowknife can experience declination changes over one degree every three years. I haven't used a compass since I was a kid and at that time declination where I live was 21 degrees. Now it's down to 13 degrees. I had no idea it changed that much.
- tjohns 2y ago
  Depends if you're in Canada's "northern domestic airspace" or "southern domestic airspace": https://www.canada.ca/content/dam/dnd-mdn/images/technical-airworthiness/english/taa-2017-02-figure-1.jpg https://www.canada.ca/content/dam/dnd-mdn/images/technical-a... Airports in the southern half of Canada still use magnetic for runways.
  - imoverclocked 2y ago
    TIL!
    - capitainenemo 2y ago
      ... for now. Goal is to get everything on True within the next 5 years. https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20north.pdf https://www.navcanada.ca/en/magnetic%20north%20vs%20true%20n... The global effort. https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth.aspx https://www.icao.int/safety/OPS/OPS-Section/Pages/Truenorth....

cjrp 2y ago

The rule of thumb I was taught for crosswind component based on difference between runway heading and wind direction was 60º = 6/6 of the crosswind, 30º = 1/2, 10º = 1/6. So if they're landing on runway 23, 270/28 would amount to (roughly) 4/6 of the wind as a crosswind component, or 19kt.

FabHK 2y ago
90º = 6/6, 60º = 5/6, 40º = 4/6, 30º = 3/6, 10º = 1/6 strikes me as pretty accurate.

queuebert 2y ago

Doesn't look like a severe crosswind to me, because there seems to be very little crabbing or rudder input, although the camera angles make it hard to tell for sure. You can also see snow blowing on the ground roughly parallel to the runway. I would guess either a downdraft or they forgot to flare or both.