FAQ     Search     Trending Topics Login    Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
 It is currently Tue Nov 21, 2017 12:27 am

 All times are UTC+01:00

 Post new topic  This topic is locked, you cannot edit posts or make further replies. Page 396 of 575 [ 8615 posts ] Go to page Previous 1 … 394 395 396 397 398 … 575 Next
 Print view Previous topic | Next topic
Author Message
 Post subject: Re: On the road today...PostPosted: Sat Sep 22, 2012 8:15 pm
 Offline

Joined: Thu May 14, 2009 12:19 pm
Posts: 1403
Location: Norway
There's a reason I picked law over any field that involves anything more than basic maths..

Top

 Post subject: Re: On the road today...Posted: Sat Sep 22, 2012 8:15 pm

Top

 Post subject: Re: On the road today...PostPosted: Sat Sep 22, 2012 9:08 pm
 Offline

Joined: Thu May 04, 2006 4:43 pm
Posts: 5411
Location: Wherever there's a mountain beckoning to be climbed
djm,

Find the steep section of road for which you want to calculate the gradient, it should be at least 100m long, but longer would be "better". Use the scale on the map to determine the length of the segment in meters. Try starting the measurement right on an elevation contour line and count the number of contour lines which cross the road to get to the end of the section; it may be best to pick the ending point right on a contour line.

If the road segment is 500m long, and 35 contours (at 5m elevation differences) cross the road by the end of the segment (the contour line at the beginning counts as zero, and the next one counts as one, and the last one right at the end of the segment counts), then enter the following in the google search box, and the answer displayed by google is the % grade of the road segment:

100*5*35/sqrt(500^2-25*(35)^2) . In this example, google provides the answer 37.3632358879, which is a little over 37%.

You only need to change the numbers in bold red, as follows: When you get the actual numbers from the map, put in the actual length of the segment in place of 500, and put in the number of contour lines crossed, in place of the 2 places in the formula in which 35 appears.

Top

 Post subject: Re: On the road today...PostPosted: Sun Sep 23, 2012 2:51 am
 Offline

Joined: Mon Jan 23, 2006 6:35 am
Posts: 5072
Location: New York
I think Djm should ride it again and get the run but it looks really short.

_________________
I never took drugs to improve my performance at any time. I will be willing to stick my finger into a polygraph test if anyone with big media pull wants to take issue. If you buy a signed poster now it will not be tarnished later. --Graeme Obree

Top

 Post subject: Re: On the road today...PostPosted: Sun Sep 23, 2012 10:26 am
 Offline

Joined: Mon Jul 21, 2008 10:20 am
Posts: 343

Love riding in France, great having parents who live here.

Much better weather than the UK, with better roads, less traffic, better cafe culture!

Todays ride was a very lumpy 90km, lots of climbing, great descents but a bloody headwind for the last 30km all the way home!

Made the "recovery drink" tast so much better!

Top

 Post subject: Re: On the road today...PostPosted: Sun Sep 23, 2012 12:01 pm
 Offline

Joined: Thu Apr 01, 2010 10:24 am
Posts: 599
Never bother trying to measure gradients with mapmyride, bikeroutetoaster or anything google maps based for short climbs. They terrain relief isn't high enough resolution. It works fine for much longer climbs like Mt Ventoux but I find it vastly underestimates the gradient of shorter climbs of <3km or so.

I wonder if it'd be possible (or if it already exists) to make an accurate gradient indicator on the bike by measuring the angle of the bike in the plane of travel? It'd be interesting for me as I always like to know gradients on hills I ride up, and measuring them on internet based maps doesn't give much quantitive indication at all as to how steep they are.

Last edited by CarpetFibre on Sun Sep 23, 2012 12:02 pm, edited 1 time in total.

Top

 Post subject: Re: On the road today...PostPosted: Sun Sep 23, 2012 1:27 pm
 Offline

Joined: Mon Jan 23, 2006 6:35 am
Posts: 5072
Location: New York
I thought MapMyRide would average the gradient over longer distances.

Here you go:

iPhone apps Clinometer - level and slope finder

_________________
I never took drugs to improve my performance at any time. I will be willing to stick my finger into a polygraph test if anyone with big media pull wants to take issue. If you buy a signed poster now it will not be tarnished later. --Graeme Obree

Top

 Post subject: Re: On the road today...PostPosted: Sun Sep 23, 2012 6:08 pm
 Offline

Joined: Tue May 03, 2011 6:36 pm
Posts: 408
Location: France
Cotentin, France

 Attachments: File comment: Barfleur 65.JPG [ 159.33 KiB | Viewed 1751 times ] File comment: Gatteville 66.JPG [ 147.07 KiB | Viewed 1751 times ] File comment: Utah beach 48.JPG [ 155.4 KiB | Viewed 1751 times ] File comment: Utah beach 49.JPG [ 149.52 KiB | Viewed 1751 times ] File comment: Utah beach 53.JPG [ 150.85 KiB | Viewed 1751 times ]
Top

 Post subject: Re: On the road today...PostPosted: Sun Sep 23, 2012 6:49 pm
 Offline

Joined: Mon Jul 21, 2008 10:20 am
Posts: 343

Just rode up the 4th cat climb near my parents house that the tour de France went over, they made it look easy I was doing 6mph by the top with an average heart rate of 178bpm, it was like riding up a bloody wall. The kom line was still painted at the top too.

Top

 Post subject: Re: On the road today...PostPosted: Mon Sep 24, 2012 2:20 am
 Offline

Joined: Mon Jan 23, 2006 6:35 am
Posts: 5072
Location: New York
<speaking as HammerTime2>
What is the gradient on that road? How long did it it take you to go the same distance as the TDF riders?
Did you go left or right at the blue arrow sign? Shouldn't the KOM line be at the very top of the hill?

<\speaking as HammerTime2>

_________________
I never took drugs to improve my performance at any time. I will be willing to stick my finger into a polygraph test if anyone with big media pull wants to take issue. If you buy a signed poster now it will not be tarnished later. --Graeme Obree

Top

 Post subject: Re: On the road today...PostPosted: Mon Sep 24, 2012 8:44 am
 Offline

Joined: Thu Sep 21, 2006 8:57 pm
Posts: 4567
Location: Vicenza
<speaking as HammerTime2>
Is that tree on the left high enough to cover you from the sun?
Did you digest well your last meal before the ride?
How many hours do you work for each week?
<\speaking as HammerTime2>

_________________
My current ride

Top

 Post subject: Re: On the road today...PostPosted: Mon Sep 24, 2012 9:48 am
 Offline

Joined: Mon Jul 21, 2008 10:20 am
Posts: 343
In no particular order:

90%
I was quicker
I went straight over the sign
KOM line has slipped down with natural erosion.
Tree wasnt high enough, so I employed a pit lane girl with an umbrella to run along side me in a bikini and heels
I had a steak dinner at the bottom of the hill as I needed the protein.
I work 0 hours per week, but do turn up at the office for about 40-45 hours each week and spend it surfing the net for bike porn.

Top

 Post subject: Re: On the road today...PostPosted: Mon Sep 24, 2012 9:52 am
 Offline

Joined: Fri Mar 11, 2011 11:33 am
Posts: 1274
Location: Asti, ITALIA
JesseD wrote:
Just rode up the 4th cat climb near my parents house that the tour de France went over, they made it look easy I was doing 6mph by the top with an average heart rate of 178bpm, it was like riding up a bloody wall. The kom line was still painted at the top too.

where are you riding in France?

Top

 Post subject: Re: On the road today...PostPosted: Mon Sep 24, 2012 9:57 am
 Offline

Joined: Mon Jul 21, 2008 10:20 am
Posts: 343
My parents live in Moissac in the Midi-Pyrénées region, no big climbs but lots and lots of 1-2 mile climbs which can be brutal, great cycling country, very rolling and the roads are quiet. Love it!

They are now on about moving closer to the Alps, obviously I am all for it!!!

Top

 Post subject: Re: On the road today...PostPosted: Mon Sep 24, 2012 3:05 pm
 Offline

Joined: Wed Jul 21, 2004 1:23 pm
Posts: 411
Location: medellin, colombia/miami, fl
some shots from yesterday's ride...miami southbound...

Camera Roll-905 by willy gil, on Flickr

Camera Roll-897 by willy gil, on Flickr

Camera Roll-903 by willy gil, on Flickr

Top

 Post subject: Re: On the road today...PostPosted: Mon Sep 24, 2012 5:17 pm
 Offline

Joined: Mon Jan 23, 2006 6:35 am
Posts: 5072
Location: New York
Wily you have taken up StephanR 's way of taking motion pics.
Nice.

_________________
I never took drugs to improve my performance at any time. I will be willing to stick my finger into a polygraph test if anyone with big media pull wants to take issue. If you buy a signed poster now it will not be tarnished later. --Graeme Obree

Top

 Post subject: Re: On the road today...Posted: Mon Sep 24, 2012 5:17 pm

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Post new topic  This topic is locked, you cannot edit posts or make further replies. Page 396 of 575 [ 8615 posts ] Go to page Previous 1 … 394 395 396 397 398 … 575 Next

Similar Topics   Author   Replies   Views   Last post
There are no new unread posts for this topic. Attachment(s) 2017 On the road today

[ Go to page: 147 48 49 50 51 ]

Nefarious86

760

88051

Mon Nov 20, 2017 8:12 pm

There are no new unread posts for this topic. Attachment(s) Hi new to WW today

ViggenNut

10

1864

Mon Mar 06, 2017 10:39 pm

There are no new unread posts for this topic. What has Frankie been doing today?

[ Go to page: 1 2 3 ]

Frankie - B

34

3034

Fri Feb 24, 2017 12:30 am

There are no new unread posts for this topic. Attachment(s) Today in things that suck

[ Go to page: 1 2 3 4 5 ]

kfreytag

63

5757

Sat Dec 31, 2016 12:48 am

There are no new unread posts for this topic. Alloy road bar with a drop curve like the ENVE SES Aero Road Bar?

VTR1000SP2

11

1555

Wed Oct 04, 2017 4:08 pm

 All times are UTC+01:00

#### Who is online

Users browsing this forum: jimaizumi, Kjetil, punk and 8 guests

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot post attachments in this forum

Search for:
 Jump to:  Select a forum ------------------ General    Weight Weenies    Introduce Yourself / Gallery - Please use metric weights.       Catch all // Gallery threads Discussion    MTB    Road       Everything wheels    Cyclocross / Gravel / Touring       Commuting    Training    Cycle Chat    For sale - Pictures are mandatory 22-3-13    Wanted Misc