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2023 Event 1: Hillingdon, Sunday 9th April |
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legs_larry 
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Joined: 09 March 2005 Location: London Town Devine Status: Offline Points: 1554 |
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 Posted: 09 April 2023 at 9:05pm |
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Photies! Get 'em while they're 'ot!
https://www.flickr.com/photos/mr_larrington/albums/72177720307365681
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====================
a bit ov a lyv wyr by slof standirds |
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Kim
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Joined: 13 April 2018 Location: Middle Earth Status: Offline Points: 1256 |
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Posted: 09 April 2023 at 11:12pm |
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Results!
Exhibit A: Live results more or less as they came out during the racing (I'll take these down soon, but might be useful for comparison if you think there's been a data-wrangling error below)... http://www.bhpc.org.uk/Data/Sites/1/media/events/liveresults/ (This was a huge success, helped more than a little by functional WiFi from the cubhouse.) Exhibit B: Polished results after going through the Shiny! New! Excel-free merge process, and a bit of virtual photo-finish adjudication... http://www.bhpc.org.uk/Data/Sites/1/media/events/events23/01/index.html Exhibit C: Championship points based on the above.... http://www.bhpc.org.uk/Data/Sites/1/media/events/events23/01/hillingdon.html Usual disclaimer applies: I'm dead on my feet and will be going to bed after hanging out the laundry and pushing a bugfix for SeriesMgr (not my bug!) to GitHub. If you think there's something wrong with either the who's-riding-what or the bistromathics, let me know and I'll investigate.
Edited by Kim - 09 April 2023 at 11:31pm |
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russellbridge
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Joined: 21 October 2013 Location: Manchester Status: Offline Points: 843 |
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Posted: 10 April 2023 at 8:16am |
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Thanks to all for a great day's racing, really enjoyed that. I picked up a s/hand GoPro 7 over winter and tested it out in the first race yesterday. Overlaid with the data from the Garmin 520 head unit and power pedals it produces a nice result - the image stabilistion of the Gopro works really well, although I think it would benefit from a rear facing camera inlay too (not possible with the gopro). Strangely using 1080p / 30fps produces 4Gb files for 11mins of racing, where as 4k / 30fps also produces 4Gb files for 11mins - I would have thought that the lower res would produce much smaller files. I'll have to have a play... And the wind noise needs sorting - this might not be an issue if the camera is inside the fairing moving forwards... Unedited 30min fast race here. What you can't see is Kim being towed round for 29mins and 50secs... :)
Edited by russellbridge - 10 April 2023 at 8:27am |
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legs_larry
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Joined: 09 March 2005 Location: London Town Devine Status: Offline Points: 1554 |
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Posted: 10 April 2023 at 10:19am |
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Needs a LordHostis commentary
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a bit ov a lyv wyr by slof standirds |
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johnlucian
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Joined: 04 July 2010 Location: Nottingham Status: Offline Points: 111 |
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Posted: 10 April 2023 at 11:53am |
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Thank you Kim fir taking care if the results. You are doing fantastic to sort it out and improve it.
Looking at my results from yesterday it looks something is wrong. I have lapped Dan Bergonzzi in the first race and I have been almost a lap up in the second race, bur I am behind in in Championship. So have a look to see what us wrong. Probably I should be just behind you in both races. |
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John Lucian
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Kim
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Joined: 13 April 2018 Location: Middle Earth Status: Offline Points: 1256 |
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Posted: 10 April 2023 at 2:52pm |
We've worked through it: - In the first race, you did 14 laps, finishing in 10th position. Dan did 13 laps and finished 12th (Tim MacDonald was 11th). I was immediately ahead of you in 9th. The lap times all look reasonable. - Once merged with the slow race, I remained in 9th, but your finish position become 12th and Dan's 18th: Two of the slow race riders were between me and you, and another four (the peloton of fast handcyclists) were between you and Tim, with Dan behind him. In the second race, Dan spent most of the race on my wheel. I followed Russell until lap 11 when he started slowing down, and I saw you up ahead on the same lap. I launched an attack (©2022 Lord Hostis), and got ahead of you, bringing Dan with me. Dan then overtook me on the last lap and beat me conclusively to the finish. - Looking at the results, Dan and I were about 23 seconds ahead of you on lap 13. Slash nipped through for the finish about 5 seconds after us, and caused Tim and you to get the flag, while Dan and I continued to complete another lap. Therefore Dan was 8th, I was 9th, Tim 10th and you were 11th. Again, the lap times all look reasonable, and the video shows Dan and I going through before Slash (and Tim and You) get the flag. - After merging with the slow race, those positions become Dan 9th, me 10th, Tim 16th and you 17th - this time the peloton of fast handcyclists came in between me and Tim, knocking you down the finish order. The SeriesMgr output has the same finish positions, and I don't see an obvious error in the points calculation. Your overall points are a lot lower than Dan's because 18th+9th scores 300 points and 12+17th scores 252.
Edited by Kim - 10 April 2023 at 8:06pm |
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Kim
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Joined: 13 April 2018 Location: Middle Earth Status: Offline Points: 1256 |
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Posted: 10 April 2023 at 3:01pm |
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Unrelated to the above, I've spotted a loss of precision in the start time offset when merging the results. The GUI is unhelpfully causing the offset to be rounded to the nearest second when you make changes to the category screen (eg. to put them in a sensible order), which will affect the first lap time of people in the fast race by some consistent fraction of a second.
I'll fix this, but it's going to take some time, as I'm going to have to reverse-engineer some GUI code to do it. Meanwhile, if anyone spots any other issues, let me know.
Edited by Kim - 10 April 2023 at 8:05pm |
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johnlucian
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Joined: 04 July 2010 Location: Nottingham Status: Offline Points: 111 |
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Posted: 10 April 2023 at 6:19pm |
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Oops, I have missed Dan going past me! I did not expected Dan be faster than you. Congratulations to him!
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John Lucian
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Kim
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Joined: 13 April 2018 Location: Middle Earth Status: Offline Points: 1256 |
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Posted: 11 April 2023 at 12:42am |
This is now fixed. Changing start wave offsets to use millisecond precision throughout was less complicated than I feared, but I had to make changes in a few different places. I've regenerated the merged results using the updated software, and rebuilt the points table.
Edited by Kim - 11 April 2023 at 12:52am |
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russellbridge
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Joined: 21 October 2013 Location: Manchester Status: Offline Points: 843 |
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Posted: 11 April 2023 at 10:08pm |
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Hi Kim, good races on Sunday - I really enjoyed them! My legs gave up a bit (lot!) in the second race... Tim's asked this on Facebook so I'll relay this on here: In the second race, how come the 5 handcyclists with 21.xxmph are ahead of Tim, John and me with 22.xxmph? Thanks Russ
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johnlucian wrote: