Ft per hour challenge

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Hmmm. Using your figures gives 183.6 W with the below formula.
=$A$2*233*9.81/(2.205*3600*3.281)
Are you loosing some power somewhere on the bike? Sorry for being Nerdy I am just interested in the figures.

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atlas_shrugged Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 03 November 2014 Location: Cambs Status: Offline Points: 1025	Post Options Post Reply Quote atlas_shrugged Report Post Thanks(0) Quote Reply Posted: 27 May 2020 at 4:53pm
	Hmmm. Using your figures gives 183.6 W with the below formula. =$A$22339.81/(2.20536003.281) Are you loosing some power somewhere on the bike? Sorry for being Nerdy I am just interested in the figures.

russellbridge Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 21 October 2013 Location: Manchester Status: Offline Points: 843	Post Options Post Reply Quote russellbridge Report Post Thanks(0) Quote Reply Posted: 27 May 2020 at 5:09pm
	Rider + all-up bike/clothing/fluid weights are: Mike 96kg 185cm Russ 89kg 177cm Gautier 92Kg 185cm First three all on decent upright road bikes with low rolling resistance tyres. Not sure if aero comes into it much at the lower climbing speeds, although Mike was using a dip and accelerating down one side to get him some of the way up the other...so his average speed was 17mph where as everyone else was circa 11mph. There was also a 15mph tailwind blowing me up Snake Pass, which made the downhill slow and very sketchy, needing the whole lane. That's obviously going to throw the power figures out too, but no idea how!

farwer Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 17 April 2015 Location: Sheffield Status: Offline Points: 117	Post Options Post Reply Quote farwer Report Post Thanks(0) Quote Reply Posted: 27 May 2020 at 7:00pm
	Not sure whether I am losing power somewhere. What number does it give you for Russel? What’s the value in $A$2? Russel did the west ascent 2 and a bit times. I did the east ascent, then down to Glossop which was all against the quite strong wind - then up the west ascend 1 and a bit times. Tyres are Schwalbe One front (20'') and Grand Prix 4000 SII rear (Annoyingly, the new and probably better Grand Prix 5000 seems to be available in 584 instead of the needed 571. Of course the power meter could be off but I had it serviced a few times and numbers seem consistent over the years. Edited by farwer - 27 May 2020 at 7:07pm

atlas_shrugged Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 03 November 2014 Location: Cambs Status: Offline Points: 1025	Post Options Post Reply Quote atlas_shrugged Report Post Thanks(0) Quote Reply Posted: 27 May 2020 at 7:30pm
	Using more accurate bike and rider weights: Mike 3114ft 96kg 248.3 W Russ 2487ft 89kg 183.8 W Gautier 2201ft 92kg 168.2 W Spreadsheet (mgh/time) formula used where $A$1 is kg and $B$1 is ft (note: E&OE) =$A$1$B$19.81/(3600*3.281) @farwer I would trust your power meter but would expect more ft similar to Russell but I guess a swap of the bike and the route is needed to explain the difference.

farwer Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 17 April 2015 Location: Sheffield Status: Offline Points: 117	Post Options Post Reply Quote farwer Report Post Thanks(0) Quote Reply Posted: 27 May 2020 at 9:50pm
	Yes. Looking at mine and Russel's power data and weights I am quite sure on same bikes and same route it would be pretty similar but Russel still in front.