RLWP Posted July 24, 2019 Share Posted July 24, 2019 My understanding of this thread is finding the longest section of level track - not flat It's in the title So all those straight bits at a constant level following some kind of partial grand circle around the earth all count. So do bits that curve, as long as they stay the same height above mean sea level Otherwise, it's going to get messy trying to work out which bits are flat but on a gradient, or are level but not flat because of infinitesimally small deviations Richard Link to post Share on other sites More sharing options...
Bomag Posted July 24, 2019 Share Posted July 24, 2019 If we are talking 2D then something level is also flat but that a flat line does not have to be level. A line with no gradient would follow the surface of the earth at the same offset from MSL at Newlyn; it would not be 'flat' Link to post Share on other sites More sharing options...
Gibbo675 Posted July 24, 2019 Share Posted July 24, 2019 5 hours ago, 62613 said: Isn't the definition of a straight line "The tangent of a circle of infinite radius?" Hi 62613, In Masonry the square points to the Earth as it is measurable and the compass, set at 60*, points to the Heavens as they are immeasurable. The G between the square and compass encodes Pi bye way of the English Gematria value of 7 for G and 22 for the word Seven. Gibbo. Link to post Share on other sites More sharing options...
Gibbo675 Posted July 24, 2019 Share Posted July 24, 2019 On 12/07/2019 at 19:50, eastglosmog said: And where any of them have been affected by coal mine subsidence. Many formerly level lines and canals in the coalfields now go up and down in switchback fashion. Hi eastglosmog, In the Wigan Area there are various Flashes which have appeared as a result of mining subsidence where the Leigh branch of the Leeds Liverpool turns into a lake with the towpath and all of the lock gear quite submerged. Gibbo. Link to post Share on other sites More sharing options...
Rivercider Posted July 24, 2019 Share Posted July 24, 2019 Brean (sic) to Bridgwater 10.5m has already been mentioned, and I would imagine another 10 miles or so north from Brean to Yatton would also be pretty close to level (with one curve, Bleadon and Uphill to Worle Jn), as the route crosses the Somerset Levels. cheers. Link to post Share on other sites More sharing options...
eastglosmog Posted July 25, 2019 Share Posted July 25, 2019 9 hours ago, Gibbo675 said: Hi eastglosmog, In the Wigan Area there are various Flashes which have appeared as a result of mining subsidence where the Leigh branch of the Leeds Liverpool turns into a lake with the towpath and all of the lock gear quite submerged. Gibbo. Hi Gibbo At one time, British Waterways Board used to have teams of bricklayers going up and down raising the banks of some canals in advance of the National Coal Boards antics. 2 Link to post Share on other sites More sharing options...
RLWP Posted July 25, 2019 Share Posted July 25, 2019 33 minutes ago, eastglosmog said: Hi Gibbo At one time, British Waterways Board used to have teams of bricklayers going up and down raising the banks of some canals in advance of the National Coal Boards antics. If you travel the more obscure parts of the BCN, watching the brickwork of the towpath edging sloping down into the water is very obvious. The Daw End canal has a lot of this, together with bridges designed to be jacked up to insert a fresh course of bricks or two 1 1 Link to post Share on other sites More sharing options...
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