Search found 48 matches

by brookside
Wed Dec 14, 2022 6:04 pm
Forum: Isaac software
Topic: Batch conversion ibr to csv or fit
Replies: 6
Views: 5692

Re: Batch conversion ibr to csv or fit

Training Peaks needs csv, fit, tcx. Thanks for reply. I'll need a lot of time, patience and a good supply of bourbon to get this done.
by brookside
Wed Dec 14, 2022 5:03 pm
Forum: Isaac software
Topic: Batch conversion ibr to csv or fit
Replies: 6
Views: 5692

Batch conversion ibr to csv or fit

Is it still the case that there's no way to do a mass conversion of ibr files to a Training Peaks readable format?
Thanks,
by brookside
Tue Dec 19, 2017 6:36 pm
Forum: Newton Technical Support
Topic: Newton toast?
Replies: 1
Views: 7052

Newton toast?

From a ride today, Newton had slope values way too high and inconsistent. It never stabilized, even after 80 miles. Was OK on last ride, a few weeks ago. Didn't drop or mishandle in interim. Is it toast, can it be serviced? Ride file attached.
by brookside
Mon Oct 23, 2017 9:23 am
Forum: Using the Newton with a DFPM
Topic: Newton not recording DFPM power
Replies: 0
Views: 8078

Newton not recording DFPM power

I've been using my Newton with both a Powertap wheel, on two bikes, and a Quarq Dzero on another. On two of my last 3 rides, one with Quarq and the other with Powertap GS, I went through a manual calibration of the DFPM using a Powertap Joule GPS unit and all looked fine. DFPM power was turned on in...
by brookside
Mon Oct 23, 2017 8:55 am
Forum: PowerPod
Topic: Climbing power vs flats power
Replies: 6
Views: 3858

Re: Climbing power vs flats power

I have exactly the same issue with my Newton vs DFPMs, climbing power matches nicely but power on flats or gentler slopes is too high on Newton. After a lot of experimentation I found the iBike suggested CdA (.4) was too high. I lowered it to 0.26, along with a minor change of lowering the Crr to .0...
by brookside
Sat Sep 09, 2017 11:36 am
Forum: Using the Newton with a DFPM
Topic: How/when Newton reports DFPM reading?
Replies: 3
Views: 8051

Re: How/when Newton reports DFPM reading?

Hmmm. The power readings during the ride were less jumpy (using DPS) and a better fit to my perceived effort than as is usual when viewing Newton power. Not using a cadence sensor may be an enhancement. A related question, when a DFPM is present but when "DFP display" is turned "off&q...
by brookside
Sat Sep 09, 2017 10:25 am
Forum: Using the Newton with a DFPM
Topic: How/when Newton reports DFPM reading?
Replies: 3
Views: 8051

How/when Newton reports DFPM reading?

Did a ride today with a DFPM but I wanted to see Newton data during ride so turned off DFPM in Setup. A few minutes into ride I noticed the Newton was reporting Calories instead of Cadence in the lower screen, and then saw my cadence magnet on crank wasn't there, but I was getting power readings on ...
by brookside
Tue Aug 01, 2017 5:24 pm
Forum: Newton General Questions
Topic: Newton is bad (ED: good) at math (equations of motion)
Replies: 1
Views: 7466

Newton is bad (ED: good) at math (equations of motion)

Having done two days of riding in hillier country than I usually ride I was taken back by the power numbers the Newton was reporting in real time, and which I saw in Isaac afterwards (and after an Analyze Route, which is obligatory to get the start and end elevations correct and to remove the headwi...
by brookside
Thu Jul 20, 2017 8:33 am
Forum: PowerPod
Topic: FTP test and power numbers
Replies: 5
Views: 3845

Re: FTP test and power numbers

Crr (coefficient of rolling resistance) has to do with your tire and tube rolling resistance, n ot aero factors like helmet etc. CdA is the drag factor of you and your bike, including your clothing, helmet, wheels, frame design etc. A Crr of .0053 is quite high, might be correct if you're using Gato...
by brookside
Wed Jul 19, 2017 2:37 pm
Forum: PowerPod
Topic: FTP test and power numbers
Replies: 5
Views: 3845

Re: FTP test and power numbers

If your average power over 20 minutes is 248 then your FTP is 95% of that, by common convention, or 236. If you think the number is too high then check what you have entered in your profile in ISAAC for Crr and CdA. With racing tires (e.g., any 320 tpi tire, Conti Supersonic or TT, Specialized Turbo...
by brookside
Wed Jul 19, 2017 2:03 pm
Forum: Newton General Questions
Topic: Cal and kJ
Replies: 2
Views: 5736

Re: Cal and kJ

There's a difference between the total energy your body burns and the energy used as motive force. Only about 25% of the total energy your body uses during a ride is available for propulsion, the rest is dissipated as heat. To put it another way, if you want to burn 500 kcal (calories as we normally...
by brookside
Sun Mar 26, 2017 12:05 pm
Forum: Newton General Questions
Topic: What do these terms mean and...
Replies: 2
Views: 5635

Re: What do these terms mean and...

OK for not modifying Aero, Fric and Riding Tilt. But what is Wind Scaling and why would one modify it (instead of or in addition to CdA)? I just looked through the new manual and all I could find on that was a statement on page 30 that says, after explaining modifying Crr, "In this same manner ...
by brookside
Sun Mar 26, 2017 10:07 am
Forum: Newton General Questions
Topic: What do these terms mean and...
Replies: 2
Views: 5635

What do these terms mean and...

..how do I deal with them in various ISAAC utilities like "Edit Profile"? - Aero - Wind Scaling - Fric - Riding Tilt For example, if I want to adjust my CdA I have to choose to "Hold" either Aero or Wind Scaling. Which should I choose, and why? Thanks, P.S. Did you ever figure ou...
by brookside
Wed Mar 08, 2017 10:11 pm
Forum: Newton Setup
Topic: Need help with calibration
Replies: 4
Views: 8777

Re: Need help with calibration

I finally got outside to do another ride with the Ptap and Newton. Different bike this time, also recent Cal ride. The results are closer when viewed in ISAAC than the last ride we discussed. But here's an effect I noticed not just today, but with that previous ride and most others: during the ride ...
by brookside
Sun Feb 26, 2017 10:29 pm
Forum: Newton Setup
Topic: Need help with calibration
Replies: 4
Views: 8777

Re: Need help with calibration

John, Wow! Thanks for doing all that work, I really appreciate it and it's helped me understand what's going on. First I want to assure you that although what I wrote, and what I write here, may sound confrontational or argumentative it's not intended in that way. I'm trying to solve a problem becau...
by brookside
Fri Feb 24, 2017 4:00 pm
Forum: Newton Setup
Topic: Need help with calibration
Replies: 4
Views: 8777

Need help with calibration

I picked up a Powertap wheel and a Joule, I've been riding with them along with the Newton. The Newton is wildly off, even after doing a new Cal ride, usually 40 to 80 watts too high, particularly on the flats and going down even slight slopes. It's just a little better going uphill, the steeper and...
by brookside
Sat Jan 14, 2017 1:21 pm
Forum: Using the Newton with a DFPM
Topic: Summarizing requirements for PowerTap wheel w/Newton
Replies: 0
Views: 7084

Summarizing requirements for PowerTap wheel w/Newton

Let me know if I'm correct in the requirements for using a Ptap wheel w/Newton, indoors and out, in order to get PTap power reported on Newton. Where I'm wrong please give correct procedure. DFPM is turned "On" in the Newton setup screen. Indoors on trainer -must have an external Ant+ (not...
by brookside
Mon Nov 14, 2016 2:03 pm
Forum: Newton Technical Support
Topic: Newton goes bonkers
Replies: 5
Views: 5144

Re: Newton goes bonkers

Yes, it's a Garmin combined spd and cad sensor. I'll replace. Sounds like you're recommending separate spd and cad sensors, which would you recommend?
Thanks,
by brookside
Sun Nov 13, 2016 5:29 pm
Forum: Newton Technical Support
Topic: Newton goes bonkers
Replies: 5
Views: 5144

Re: Newton goes bonkers

Hi John, I replaced the battery before today's ride, and did a data reset, but had the same problems: wildly fluctuating slope and wind readings, incorrect speed readings, along with the mileage being lower than actual. I can understand speed and distance being off if the spd/cad sensor is failing b...
by brookside
Sat Nov 12, 2016 2:49 pm
Forum: Newton Technical Support
Topic: Newton goes bonkers
Replies: 5
Views: 5144

Newton goes bonkers

The Newton worked fine yesterday, but today it went insane. First cold morning for the Newton this year, about 33 at start, it was indoors until the ride start. The first 3 miles look spot on, both in real time and in Isaac, similar to all my other rides. At that point, a stop light and first stop, ...
by brookside
Sat Oct 15, 2016 1:26 pm
Forum: Newton General Questions
Topic: Upgrade to FW 5.13 changed button action(s)
Replies: 1
Views: 2647

Upgrade to FW 5.13 changed button action(s)

I just did a firmware upgrade to FW 5.13 on an older Newton, one where you can select ride profiles directly on the device itself. At the end of each ride I was in the habit of holding the center button for a few seconds to do a trip reset before walking my bike in the driveway and into garage, or a...
by brookside
Thu Aug 25, 2016 5:46 pm
Forum: Newton General Questions
Topic: Fit Train Questions
Replies: 5
Views: 4833

Fit Train Questions

Started experimenting with this mode for ad hoc interval sessions. Couple things: - if I enter the FT while the bike is moving it automatically goes to the FT mode (TT or user) that it was in last and I don't have the option of selecting a different mode, unless I stop the bike and let the speed rea...
by brookside
Tue Jun 07, 2016 1:57 pm
Forum: Newton Technical Support
Topic: Wind readings inconsistent
Replies: 8
Views: 5882

Re: Wind readings inconsistent

I've been thinking I need new Cal Rides for all my Profiles. I'll do them and let you know if it helps.
Thanks,
by brookside
Mon Jun 06, 2016 10:02 pm
Forum: Newton Technical Support
Topic: Wind readings inconsistent
Replies: 8
Views: 5882

Re: Wind readings inconsistent

Is there anything I can do to this unit to improve the wind readings? I went for a ride today and the wind it read was completely off. In the ride file attached I basically went north for 10 miles, did 3 2.5 minute efforts back and forth on the same west to east road, #1 and #3 were in the same dire...
by brookside
Tue May 17, 2016 1:17 pm
Forum: Newton Technical Support
Topic: Wind readings inconsistent
Replies: 8
Views: 5882

Re: Wind readings inconsistent

Thanks for that. Makes a lot more sense. I used your procedure and did the same but also tweaked the Crr as I saw I was using a stock number (.004) and the tires/tubes I used have a measured Crr of .003 which brings the average power down just a couple watts. Question: how did the Newton get so out ...
by brookside
Mon May 16, 2016 2:27 pm
Forum: Newton Technical Support
Topic: Wind readings inconsistent
Replies: 8
Views: 5882

Re: Wind readings inconsistent

Attached is another file re: questionable wind readings. The middle lap, ending at mile 6.5, represents 6 circuits of an almost 1 mile, roughly oval course, oriented North-South. The wind was from the wnw. It just seems impossible that I'd get an average negative of wind of 2.5 mph for a trip like t...
by brookside
Wed May 04, 2016 9:33 am
Forum: Newton Technical Support
Topic: Wind readings inconsistent
Replies: 8
Views: 5882

Wind readings inconsistent

Did a ride yesterday, basically out and back with only a two mile section different but on parallel roads (roughly miles 10.3 to 12.3 on way out and 20.3 to 22.3 on way home) It was a south to north to south ride, wind was reported out of east at about 4mph. The first 10 miles north Isaac shows a he...
by brookside
Mon Mar 14, 2016 1:39 pm
Forum: Newton General Questions
Topic: Accuracy of Watts vs other PM
Replies: 12
Views: 10236

Re: Accuracy of Watts vs other PM

My readings seem too high at times as well, some things can be corrected, some I don't think can be. Correctable - don't use the IBike suggestions for Crr and CDA, they're probably too high causing larger power numbers than you're really pulling. With good tires (e.g., almost any 320 tpi tire, Conti...
by brookside
Thu Jan 07, 2016 6:26 pm
Forum: Newton General Questions
Topic: Newton Temperature Compensation?
Replies: 1
Views: 2437

Newton Temperature Compensation?

Does the Newton account for, in its power computations, temperature? Now that it's cold I'm wondering if the watts adjust for increased air density vs the calibration ride temp, or any physiological or other effects of near freezing temperatures. Thanks,
by brookside
Sun Jan 03, 2016 9:37 am
Forum: Newton General Questions
Topic: Tire rolling resistance
Replies: 2
Views: 3291

Re: Tire rolling resistance

Here's another test done on a smooth roller, as far as I can tell, which seems a lot closer to the roads I ride vs the surface of the roller in the test you referenced (if I ever found myself on a road like that I'd get off it pronto, looks very unrealistic IMHO). Results have a good deal of similar...