[Golden Cheetah - Feature #498] (New) Add virtual power for the LeMond revolution

[golden.ch...@gmail.com]

Issue #498 has been reported by Mark Liversedge.

----------------------------------------
Feature #498: Add virtual power for the LeMond revolution
http://bugs.goldencheetah.org/issues/498

Author: Mark Liversedge
Status: New
Priority: Normal
Assigned to: Mark Liversedge
Category:
Target version: 3.0
Patch Attached: No

Would be good to be able to derive power from speed on the LeMond. See: http://wattagetraining.com/forum/viewtopic.php?t=335 for a summary of the verification and analysis of the power curve for this device. Should be a breeze to implement.

--
You have received this notification because you have either subscribed to it, or are involved in it.
To change your notification preferences, please click here: http://bugs.goldencheetah.org/my/account

[Brendan]

before it is implemented you can do what i did, which was to use the formula of the curve to transform speed to power in realtime (in cycleops Fluid2).  I used Quartz composer to build my osx app.

[Gareth]

Hi,

That is what Mark has done. It has been added as another device to
use.

It is now in both the 2.1 and 3.0 code base.

Gareth

[Mark Liversedge]

Indeed, but I have NO idea if the LeMond send ANT+ speed. From what I can see you have to buy the Pilot head unit and it comes with a speed and cadence sensor.. the head unit then does pretty much the same thing as we do, but takes into account barometric pressure.

[Chip Hawkins]

There is a little magnet embedded in the big pulley that replaces your
wheel so you could rig a speed sensor to it. If you have a power
pilot, it transmits power, but uses the fitness equipment protocol
which is a bit hairy to implement. The FE protocol also must be the
master, so you'd have to sync your session to start and stop based on
buttons pressed on the power pilot or you'd lose the link. We ran
into the same issues trying to make it useful in our iphone app
without having to buy the power pilot. If you added barometric
pressure to your calculation from a weather station you should be able
to get really accurate power from it. The power numbers are going to
look a bit weird during acceleration and deceleration because of the
power sucked into flywheel inertia.

Chip
Wahoo Fitness

> --
> _______________________________________________
> Golden-Cheetah-Users mailing list
> golden-che...@googlegroups.com
> http://groups.google.com/group/golden-cheetah-users?hl=en

[Mike Patton]

You can actually order the LeMond speed sensor that comes with the
whole powerpilot thing, I think. I have successfully used the Wahoo
App + iPhone to read the speed data. However, a Garmin combo speed/
cadence sensor with the little articulating arm works ok using the
embedded magnet if you zip tie the sensor to the black plastic housing
around the fan.

Mike Patton
Canadian Cycling Association

[Tom_A]

One word of warning about coding this up. Apparently the friction
drag of the LeMond Revolutions can vary fairly significantly from unit
to unit. This is partly the reason that the Power Pilot firmware
recently added a coast down procedure. If the "virtual" Crr is used
from my testing shown in the link, it may not represent the value
needed for a particular trainer. I would suggest allowing the user to
modify that value after doing a "step test" with a power meter on
their particular unit.

On Oct 26, 1:54 pm, golden.cheetah.b...@gmail.com wrote:
> Issue #498 has been reported by Mark Liversedge.
>
> ----------------------------------------

> Feature #498: Add virtual power for the LeMond revolutionhttp://bugs.goldencheetah.org/issues/498

>
> Author: Mark Liversedge
> Status: New
> Priority: Normal
> Assigned to: Mark Liversedge
> Category:
> Target version: 3.0
> Patch Attached: No
>

> Would be good to be able to derive power from speed on the LeMond. See:http://wattagetraining.com/forum/viewtopic.php?t=335for a summary of the verification and analysis of the power curve for this device. Should be a breeze to implement.

[john mannion]

any joy on setting this trainer up for virtual power wheel size etc?

thanks for everything you do!