Is the cache at the posted co-ordinates? Of course it isn't. To find out where I've hidden it you'll have to solve the following puzzle.
The posted co-ordinates are for the precise spot where myself, kathwood2003 and some muggle friends watched the riders of the Tour de France whoosh past in the blink of an eye. It was the third stage and started in Cambridge before a sprint finish in London on July 7th 2014. Don't believe me? Here's a picture to prove it of one of us.
Another photo of the pro peleton riding past as speeds I can only dream of on a bike.
Below is a picture of my bike in 2014 on Mont Ventoux. It's a very nice bike. A carbon fibre frame, 622mm diameter wheels (but with fully inflated tyres that's 700mm), 11-28T 10 speed cassette, 50-34T chain ring and metal seat post.
In belated honour of the Tour visiting Walthamstow I've hidden a cache. But where is it?
From the posted co-ordinates I decided to get on my bike and I cycled in a more or less northerly direction through Epping, Harlow and Bishop's Stortford. I cycled for 135.528882 minutes at a constant cadence of 90 rpm. Miraculously I didn't change gear so the chain was on the 50T sprocket on the chain ring and on the 26T sprocket on the cassette.
I then decided to change direction and headed west. The going was a lot tougher so I changed gear to 34T on the chain ring and 28T on the cassette. My cadence also dropped to 55rpm. I only managed to cycle for a short time (0.10066 minutes to be precise) before I gave up and got a train from the conveniently located nearby station.
For the puzzle I did all calculations to six decimal places and remember that proper cyclists use metric measurements (wheel circumference and distance in kilometres please). For precision I used Excel. There are online tools which could help but after checking a few these produce differing results. Some right, some wrong. As you need to be quite precise with your solution I do not recommend using them.
A checker is provided and I've built in a small amount of flexability with the final co-ordinates so there is some margin for error.
