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Wind Scaling
Posted: Sat Oct 01, 2016 12:05 am
by powertothepeople
New user here and quite impressed with the PP over-all. This is my first foray into riding with power so I have no real basis of comparison, but what I can say is that the power numbers seem "legit" - they respond almost immediately to surges, coasting, climbs, descents, drafting, just riding along, and are repeatable.
Pretty impressed, so far.
One concern though: I'm using profile 2 and I noticed that the wind scaling is set at 1.240 for the out-front mount; is that right? I've read here that it supposed to be 1.7
I'm also using my own mount which doesn't extend out as much (my head unit is a Garmin Edge 500) Is that the correct wind scaling? Sorry, but total noob here, just started using the PP.
I've attached my latest ride for your info (and if you can take a look and see if the numbers are all in order).
Thanks.
Re: Wind Scaling
Posted: Sat Oct 01, 2016 6:32 am
by Velocomp
Was this a group ride or a solo ride?
If a group ride, please do a short out and back solo ride.
Re: Wind Scaling
Posted: Sat Oct 01, 2016 9:05 am
by powertothepeople
Mostly solo. Rode with a group at 30km mark, for about 15kms (loops).
Re: Wind Scaling
Posted: Sat Oct 01, 2016 11:36 am
by Velocomp
Please do a short out and back ride (10KM is OK), then post the ride file.
Re: Wind Scaling
Posted: Sun Oct 02, 2016 9:37 pm
by powertothepeople
Will do, thanks. Does riding around a loop (about 1km/loop) qualify as an out and back?
Re: Wind Scaling
Posted: Mon Oct 03, 2016 9:20 am
by Velocomp
powertothepeople wrote:Will do, thanks. Does riding around a loop (about 1km/loop) qualify as an out and back?
Yes, that will work just fine.
Re: Wind Scaling
Posted: Wed Oct 05, 2016 3:09 am
by powertothepeople
Hi John, here's my out and back ride file. Please note that the actual out and back (loops) began at around the 1.4km mark. I had to change the original route and restart the loops due to some traffic issues.
However, from the 1.4km point to the end of the ride (same as starting point), it was a pretty consistent ride, total distance was about 10.5km more or less.
Hope this will suffice, thanks for the help.
Re: Wind Scaling
Posted: Wed Oct 05, 2016 5:43 am
by Velocomp
I used the command Analyze/Check Calibration... to correct your profile.
Load this profile into your PowerPod and you'll get much more accurate readings.
Re: Wind Scaling
Posted: Wed Oct 05, 2016 8:35 am
by powertothepeople
Thank you John. Just to be sure of the procedure, in Isaac:
1. Edit Profiles
2. Import the IBP File
3. Select it
4. Send to Device
5. Pop up window: Profile Set
All good?
Re: Wind Scaling
Posted: Wed Oct 05, 2016 12:00 pm
by Velocomp
powertothepeople wrote:Thank you John. Just to be sure of the procedure, in Isaac:
1. Edit Profiles
2. Import the IBP File
3. Select it
4. Send to Device
5. Pop up window: Profile Set
All good?
Correct!
Re: Wind Scaling
Posted: Fri Oct 07, 2016 1:45 am
by powertothepeople
Thanks John.
Just did the same out and back with the new profile you provided.
Looks okay, I guess...no comparison so I'll assume all is in order.
Got to do an ftp test soon...ugh

Re: Wind Scaling
Posted: Sat Aug 19, 2017 1:21 pm
by maxcata
Hi John
I did the out&back calibration for both my road bikes. The mount that comes together in the Powerpod box is on bike #1, on bike #2 I have a Garmin combo mount.
Can you help me on checking both profiles? I have wind scaling values a little bit higher than the suggested values, especially on bike #2.
bike#1 calibration ride was made on a flat road with a lot of 90°turns, no wind, no traffic, no draft.
bike#2 calibration ride was made on a flat and straight road. It was lightly windy, and 5-6 cars overpassed me, no draft.
I am asking for your help because in the fine-tuning video I have seen that wind speed and wheel speed should be similar as more as possible. And they are not.
In attach profiles and calibration rides for both bikes (bike #2 on next post)
Thank you in advance
Max
Re: Wind Scaling
Posted: Sat Aug 19, 2017 1:22 pm
by maxcata
Bike#2 files follow.
thanks again
M
Re: Wind Scaling
Posted: Sun Aug 20, 2017 11:12 am
by Velocomp
Cal ride for bike #2 is fine
Cal ride for bike #1 also is fine
Wind scaling depends heavily on the position of your PP on your bike.
Re: Wind Scaling
Posted: Mon Aug 21, 2017 5:15 am
by maxcata
Thank you for your prompt feedback!
M.
Velocomp wrote:Cal ride for bike #2 is fine
Cal ride for bike #1 also is fine
Wind scaling depends heavily on the position of your PP on your bike.