The bottom left-hander can be the worst part on there.I checked the maximum speed on it today's ride... It was a bit lower than usual because of a cross-headwind on the fastest part of the descent. I have to freewheel on it because I don't have a high enough gear/cadence to use pedal power.
This is the descent - Blackstone Edge to Littleborough:
View attachment 470303
View attachment 470304
71.6 km/hr = 44.5 mi/hr.
I have freewheeled to 88 km/hr (55 mi/hr) on that descent in the past with more favourable wind conditions. I often catch cars down there but never overtake them - just too risky! Apart from slightly unpredictable drivers, there are often VERY unpredictable sheep at the roadside.