Well thats probably why it was looked at in the design stage and why the person that knew about these things told me about it .
power meters
- Thread starter jamma
- Start date
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I understand that the Garmin vector does not read linear as doing so would prevent it from displaying Platform Centre Offset data which it is capable of doing remarkably well.
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S-Express
Guest
Ha ha - a comedian.
Well, maybe if you had been clearer, or perhaps were in posession of a little more knowledge. All you need to do is explain what you mean by 'linear' power delivery. Perhaps if you could clear that up?
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jiberjaber
Veteran
- Location
- Essex
You'll find a good description (though slightly out of date with the present market) on how it all works here:
http://bicycles.stackexchange.com/questions/5612/how-do-bicycle-power-meters-work
What is being called (none) linear is really about the impact of force on the pedal, crank, BB and how it deforms (twisting/bending etc) these components, so to get the full power output you need to measure all the vectors the force acts through all the way through the pedal cycle, clever alignment of strain gauges etc help ( because of the way they work, https://en.wikipedia.org/wiki/Strain_gauge ) but it's perhaps not economically or technologically viable to cover the object in enough orientated gauges to capture all the vectors of forces in action all the time, so a compromise has to be made with some clever maths to fill in potential gaps.
The key thing as pointed out by them that has 'em is consistency, regular interpretation / tracking of data trends and testing to establish a baseline (FTP / power at various durations).
There's plenty of guides out there on how to use power meters effectively either for improvement or pacing etc
Battery life with Vector 2 has the same issues as Stages in that it is very effected by temperature, in the winter with temp <7 degreesC I was lucky to get a 200km ride out of a set of batteries sometimes. Presently I am getting over 1000km on a set of batteries. I also suffer from occasional inconsistency in balance between left and right measurements - the root cause of which is often obscured as anyone who has any Garmin product will know, we are all their beta testers! LOL
http://bicycles.stackexchange.com/questions/5612/how-do-bicycle-power-meters-work
What is being called (none) linear is really about the impact of force on the pedal, crank, BB and how it deforms (twisting/bending etc) these components, so to get the full power output you need to measure all the vectors the force acts through all the way through the pedal cycle, clever alignment of strain gauges etc help ( because of the way they work, https://en.wikipedia.org/wiki/Strain_gauge ) but it's perhaps not economically or technologically viable to cover the object in enough orientated gauges to capture all the vectors of forces in action all the time, so a compromise has to be made with some clever maths to fill in potential gaps.
The key thing as pointed out by them that has 'em is consistency, regular interpretation / tracking of data trends and testing to establish a baseline (FTP / power at various durations).
There's plenty of guides out there on how to use power meters effectively either for improvement or pacing etc
Battery life with Vector 2 has the same issues as Stages in that it is very effected by temperature, in the winter with temp <7 degreesC I was lucky to get a 200km ride out of a set of batteries sometimes. Presently I am getting over 1000km on a set of batteries. I also suffer from occasional inconsistency in balance between left and right measurements - the root cause of which is often obscured as anyone who has any Garmin product will know, we are all their beta testers! LOL
The stack exchange link is worth a visit just to see the first SRM power meter. Frankenstein's crank!
