solarEbike wrote: ↑
Jul 04, 2018 8:03 pm
UPDATE: So it looks like they camped by the side of the road in a field 4 km (10 minutes) down the road from this spot.
Indeed! In and among a field of sunflowers, which has been the one constant agricultural staples we've seen since Croatia onwards.
Our hope of making it all the way to Tekridad was thwarted by both a headwind and Turkey having a rollercoaster terrain of short but reasonable steep (6-7%grade) hills, not quite long enough to get appreciable regen on the downhill portion but definitely long enough to make every uphill leg a slow drag, increasing consumption, and reducing the average speed. Apparently there is quite a bit more of this in store for the rest of Turkey too. So as 9pm (suntrip cutoff time) approached we still had ~20km to go and with nothing remotely interesting in site just pulled into the nearest field.
Maybe they set up camp and noticed that the Spot device needed charging and plugged it in and it started broadcasting again?
Nah the Suntrip people set up the spot for a very low rate of data updates so that the loading of the live map wouldn't get bogged down from too many datapoints with all the participants tracks. It's not really useful as a real-time tracker, as we found when we were trying to hook up with the French Viguier brothers
in Belgrade. We were zigzagging through the city to their latest location, and then once we got there it was updated to somewhere else. It was only after we gave up trying to meet that our paths crossed by happenstance on the way out of town.
And speaking of crossing paths, that's also what happened more or less in Tekridag yesterday when we met with Waiwon Ching of eZee bike ! He came a totally different route, riding much of Italy and then taking a ferry to Greece. He's also been a bit of a Suntrip rebel; didn't take a GPS tracker and is charging up at hotels so not attempting to follow the official rules at all, but he IS one of the few others on the suntrip trajectory going through Iran ( as well as the team from Morocco
) and so I'm glad we've met up for a bit.
It's possible that we'll reconnect again later but for the next while we're going to try and hit consistent 200km days while he's doing more like 150.
Cephalotus wrote: ↑
Jul 04, 2018 8:47 am
Thanks a lot for the data on your "perfect day". Highly appreciated.
I hope that someday after the trip there will be data available for every day and every vehicle involved. That would be great.
That's what we're hoping to get from all of the databoxes that we built and installed on almost all the vehicles just before departure. I'm not sure if the Suntrip organizers are planning to make that all public or not but I sure hope so since it would be wonderful to have others able to access that as reference info for solar travel.
Can you show data from a day with rainy or overcast weather, too if you find some time to do so?
Exactly. It's the kind of thing I need some time and mental space to plough through which is hard to find while on the trip. But I have all the logged data on hand up to one that I just shared and can provide a dropbox link if you want to have a direct look before I have time to present it here. Each day is about 10MB uncompressed, data logged at 1 second rate.
I wonder about the rather high consumption of around 11.2Wh/km at "only" 30,6km/h average speed in perfectly flat terrain.I expected more efficiency especially on a tandem trike. Maybe it's the very bad rolling resistance of three knobby tires or significant air resistance or did you experience heavy headwinds?
No the winds were ideal and mostly from behind, this was a realllly ideal day. In normal conditions we'd see more like 15 Wh/km, and riding around Vancouver in the testing (more stop and go) we were often 17-18. At first I was also a tad disappointed by the overall wh/km numbers but it's not at all surprising. We probably have at least double the effective air drag of a normal bike, since it's a wide trike, with more or less upgright seats, and the roof support structure has more struts and things attached to it than most of the other vehicles. Plus it weighs a ton, not just the heavy solid steel base frame but also the loads of stuff we're carrying. Here it is laid out on the street yesterday when we stripped it for doing some mechanical work to give you an idea of what's in tow
Effectively this vehicle was built for cruising comfort rather than propulsion efficiency, and then we've got enough motor oomph and solar area to still make it work. We got protection from the sun, protection from the rain, and enough cargo gear to be self reliant at surviving and repairing whatever gets thrown our way. If you look at it per-person, it's still pretty good. 5-6 wh/km apiece on ideal days and 7-8 wh/km each on more typical terrain.
But it's true that other riders on tandems will surely have generally better wh/km stats than us, since they are generally lower profile, with more recumbent seats, and a lower roof height with a lower drag roof support.
wturber wrote: ↑
Jul 05, 2018 3:58 pm
Oh - and it looks like An-So and Justin are have probably just about finished their ferry ride. Hopefully they got their batteries good and charged during the ride.
The batteries got all charged up just waiting for the ferry departure! We thought there was one at 11am but it turned out that didn't stop in the right port so we had to wait till 5. But at least the evening ferry ride became the perfect opportunity to do some upgrades and repairs with parts from the care package and tools that I brought along, and the ferry deck was converted to a workshop between the trucks loaded with livestock.
I got a set of metric self drilling taps now and being able to form threaded holes makes me feel like I can really do anything
This is me getting the tilting roof mechanism repaired so that we can again change the roof angle while riding again without having to dismount and use tools.