Search found 140 matches

by KenS
Thu Dec 03, 2015 4:28 pm
Forum: Frequently Asked Questions
Topic: change of body weight in profile.
Replies: 3
Views: 2178

Re: change of body weight in profile.

The two values are rider weight and total weight which is bike plus gear plus rider weight. Total weight is used in the power algorithm so it is the most important. Rider weight is only used for W/kg and for initial CdA estimate.
If you aren't doing what John said, you are doing it wrong :)
by KenS
Fri Oct 02, 2015 5:58 am
Forum: Newton Setup
Topic: 35mm bar, solutions?
Replies: 5
Views: 1923

Re: 35mm bar, solutions?

Steer tube mount?
by KenS
Thu Oct 01, 2015 2:32 am
Forum: Product Reviews
Topic: Dc Rainmaker Comment
Replies: 19
Views: 9350

Re: Dc Rainmaker Comment

My understanding of filters is that data doesn't have to be thrown away, for example speaker cabinets filter frequencies to the correct speaker size. I have no idea how their circuit is designed, but if I had to guess I would think there was some sort of filter on the analogue signal from the oscil...
by KenS
Fri Dec 19, 2014 6:56 am
Forum: Newton Setup
Topic: Auto Shutoff
Replies: 18
Views: 3446

Re: Auto Shutoff

If you want to use Newton for wind measurement you need to be hiking at more than 8 km/h otherwise it shows 0 wind. If you are adept at some electronics and programming you could try to build your own device using Arduino. All the sensors you want are readily available. Maybe someone has already des...
by KenS
Wed Oct 29, 2014 3:39 pm
Forum: Isaac software
Topic: Temperature adjustment in Isaac 3.0.2
Replies: 17
Views: 4824

Re: Temperature adjustment in Isaac 3.0.2

I thought the temperature adjustment only works on the Newton display but it still downloads the raw temperature to Isaac
by KenS
Sat Oct 11, 2014 6:09 am
Forum: General Discussion
Topic: Using Newton on a Touring Bike
Replies: 57
Views: 14819

Re: Using Newton on a Touring Bike

You only need to do one cal ride per bike to get your wind scaling factor.
Then do a set of coast downs to get your CdA and Crr.
Cal rides don't determine Crr - they just work out your wind scaling factor and riding tilt. So no need to do one on a trail.
by KenS
Fri Oct 10, 2014 9:48 pm
Forum: General Discussion
Topic: Using Newton on a Touring Bike
Replies: 57
Views: 14819

Re: Using Newton on a Touring Bike

I would also guess, depending on bike tires, pressure etc and on short hills, the early change in tilt from nose down more weight forward until the barometric correction is worked in, would contribute something too (haven't worked out in my head quite what at the moment). That makes sense Russ. If ...
by KenS
Fri Oct 10, 2014 5:10 pm
Forum: General Discussion
Topic: Using Newton on a Touring Bike
Replies: 57
Views: 14819

Re: Using Newton on a Touring Bike

You should do the cal rides and coast downs on a good surface to get good baseline cdA and crr. That gave me cda of 4.5 and crr .0094 (Vittoria Randonneur Pro 26"x40) To get cda with full touring kit I watched my dynamic cdA when coasting downhill on a good surface and found it was about 5.6 with pa...
by KenS
Thu Oct 09, 2014 3:51 am
Forum: General Discussion
Topic: How Tough is Newton?
Replies: 4
Views: 1326

Re: How Tough is Newton?

The unpaved roads we used were generally not rough in terms of pot holes and the like but they had corrugations and various sized pieces of stone mixed in with the gravel so constant small vibrations were the order of the day. The attached photo is from a rail trail section and is pretty typical of ...
by KenS
Wed Oct 08, 2014 7:25 pm
Forum: General Discussion
Topic: How Tough is Newton?
Replies: 4
Views: 1326

How Tough is Newton?

In case you aren't willing to try the experiment I found out just how tough the Newton is on my recent bike tour in the Australian high country when I came off my fully loaded touring bike on a remote dirt road. Newton was mounted on the new forward mount and took a hit. The mount was bent about 5 d...
by KenS
Sat Oct 04, 2014 10:59 pm
Forum: Newton Technical Support
Topic: No power readings for first 10 mins
Replies: 3
Views: 1079

Re: No power readings for first 10 mins

Could be your tilt calibration is out. Look at the Hill readings next time in the first ten minutes. Chances are it thinks you are going downhill until it does its internal auto correction.
by KenS
Thu Sep 18, 2014 10:14 pm
Forum: Newton Firmware
Topic: Firmware 5.0 is coming
Replies: 24
Views: 6960

Re: Firmware 5.0 is coming

Been trying to make the purchase and pay with Paypal. But when it sends me back to the store for shipping details it says "checking out as guest" and wont let me use my email address because it's "already in use". :( So I tried again through Paypal and same problem. So then I used a "spare" email ac...
by KenS
Sat Aug 23, 2014 10:05 pm
Forum: Newton Setup
Topic: Lower watts than expected and no cadence reported
Replies: 7
Views: 1379

Re: Lower watts than expected and no cadence reported

Looking at that it does look like a problem with your cadence sensor.
There are other more knowledgeable than I who could comment further
by KenS
Fri Aug 22, 2014 4:56 pm
Forum: Newton Setup
Topic: Lower watts than expected and no cadence reported
Replies: 7
Views: 1379

Re: Lower watts than expected and no cadence reported

Please post your ride file.
If you were getting power readings it was not a problem with your cadence sensor
by KenS
Wed Jul 23, 2014 6:12 pm
Forum: Isaac software
Topic: GPX merge
Replies: 11
Views: 2873

Re: GPX merge

I wonder if this is related to a problem I sometimes encounter -but never as bad as this. Sometimes when Isaac matches up the GPS file to the iBike file it has points that go backwards in time. This seems to happens around stops. A hint as to a possible cause is in the graph that is displayed during...
by KenS
Fri Jul 11, 2014 12:06 am
Forum: Newton Technical Support
Topic: braking
Replies: 8
Views: 1848

Re: braking

I definitely didn't coast or brake on a 12 % incline ! Ahhh - so you are not yet a Jedi master :D I think ronpei is onto something. Sometimes under high effort you can move the cranks enough to take the cadence magnet out of range of the sensor, if its already near the limit. Or maybe you bumped th...
by KenS
Thu Jul 10, 2014 3:24 pm
Forum: Newton Technical Support
Topic: braking
Replies: 8
Views: 1848

Re: braking

You need to post your ride file. All the graphs look a bit odd e.g. looks like you were coasting uphill some of the time
by KenS
Sat Jun 21, 2014 1:51 am
Forum: PowerStroke
Topic: Scaling the Wasted Motion plot
Replies: 0
Views: 1138

Scaling the Wasted Motion plot

Not a biggie but I was trying to scale the wasted motion plot so that it would have the same scale Front-back and Left-right. The scaling of the plot works but the boxes showing 2W, 5W and 10W stayed the same size. Not sure if its just my setup but is it possible to make the default scaling on the t...
by KenS
Mon May 05, 2014 8:24 am
Forum: Newton Setup
Topic: Changing tyres
Replies: 1
Views: 724

Re: Changing tyres

Don't forget to check for any difference in wheel circumference
by KenS
Mon Apr 14, 2014 3:36 am
Forum: Newton General Questions
Topic: Suggestion
Replies: 2
Views: 1206

Re: Suggestion

It would be great if the RWS could be inserted with the green tab in place. That wee green tab can be awfully hard to find after you've taken it off to use the RWS :)
by KenS
Thu Mar 06, 2014 3:43 pm
Forum: Newton Technical Support
Topic: Ibike Newton and Garmin Vector
Replies: 7
Views: 2681

Re: Ibike Newton and Garmin Vector

Why not just upgrade to Powerstroke? ;)
by KenS
Wed Mar 05, 2014 3:24 am
Forum: Newton Setup
Topic: Wind Callibration
Replies: 11
Views: 2284

Re: Wind Callibration

You may need to clarify whether by "wind calibration" you mean the Wind Cal option in Newton setup or the Cal ride If you've done a proper Cal ride you should not be getting weird wind factors. That includes letting Newton settle to ambient temperature then do a Wind Cal in a sheltered location with...
by KenS
Tue Feb 18, 2014 1:31 am
Forum: Newton Technical Support
Topic: Cda Questions
Replies: 19
Views: 5579

Re: Cda Questions

The CdA in Newton is calculated based on your height, weight and position. Snapshot CdA can be affected by various factors: head/tail wind, road surface, your position on the bike, braking. But in theory the snapshot Cda should be close to the Cda you have set in the profile (calculated as you say ...
by KenS
Sat Feb 15, 2014 11:02 pm
Forum: Newton Technical Support
Topic: Cda Questions
Replies: 19
Views: 5579

Re: Cda Questions

The CdA in Newton is calculated based on your height, weight and position. Snapshot CdA can be affected by various factors: head/tail wind, road surface, your position on the bike, braking. Basically, Newton works out how fast you should be coasting based on the calculated CdA then reports the CdA t...
by KenS
Fri Feb 07, 2014 11:22 pm
Forum: Newton Setup
Topic: Garmin and Newton/Isaac different power readings
Replies: 6
Views: 2076

Re: Garmin and Newton/Isaac different power readings

Check your recording parameters on the Garmin. Are you using Smart recording which drops readings? Is zero averaging off? This causes the Garmin to ignore zero readings.
No need to calibrate the power meter. I never get that prompt although could be because I'm using an old Edge 705
by KenS
Tue Jan 14, 2014 10:23 pm
Forum: Newton Setup
Topic: Max Speed wrong
Replies: 8
Views: 2101

Re: Max Speed wrong

If you set smoothing to 0:00:00 (at the top of the screen to the left of the "Show" button) you can see two spikes
by KenS
Tue Jan 14, 2014 5:42 am
Forum: Newton Setup
Topic: Speed/Watts Problem
Replies: 8
Views: 1805

Re: Speed/Watts Problem

Some things to check:
Positioning of your speed sensor and wheel magnet
Wheel size in your Newton
Speed sensor battery
by KenS
Thu Jan 09, 2014 3:09 am
Forum: iBike Features
Topic: Metrics Comparison
Replies: 2
Views: 1696

Re: Metrics Comparison

Hope you weren't hurt falling into that sinkhole at 3.8mi or off the cliff at the end :lol:
by KenS
Fri Dec 20, 2013 6:23 pm
Forum: PowerStroke
Topic: Powerstroke and rollers
Replies: 9
Views: 5561

Re: Powerstroke and rollers

When I moved my Newton to another bike/profile, I had to manually turn on Fast Rec on the second profile.
Then I got the HiDef files
Could be the same when you go into Trainer mode
by KenS
Sat Nov 16, 2013 3:34 pm
Forum: PowerStroke
Topic: Powerstroke front/back diagram
Replies: 3
Views: 1845

Powerstroke front/back diagram

Just got the Powerstroke upgrade and went for a ride. It promises many hours of geeky fun ahead :) Looking at the results in Isaac on the Front/back animated display I found it a little non-intuitive to understand because the amount of variation from ideal is shown radially rather than as front to b...