hills

[hughdavies]

Steep hill signs. I understand ratios and degrees but when they say a hill is 15%, 15% of what ??

 

[rayc]

Hugh, 10% = 1:10, 15% = 1:7.5 (approx.) 20% = 1:5 etc. Just divide the % number into 100.

Ray

 

[hughdavies]

Thanks for the explenation Ray but WHY o WHY. Use degrees and if you see 90 you are going over a cliff, simple.

 

[WatsonJohnG]

EEC

 

[Lutz]

Thanks for the explenation Ray but WHY o WHY. Use degrees and if you see 90 you are going over a cliff, simple.

Like Ray says, percentages and ratios are just two alternative ways of describing the same, just as decimals and fractions. Regardless of which of these measures one uses, they relate directly to the power required to climb the gradient. Degrees would not be helpful here as the relationship is not linear.

 

[JeffinSpain]

Hugh, Hills to me mean a lower gear, nothing more.

 

[rayc]

Hugh, Hills to me mean a lower gear, nothing more.

Jeff, I hope that is going down as well as up. Are you saying the % signs are a waste of time and a simple sign with the words 'Hill[UP or Down as relevant]' will suffice? Ray