AeroPod, PowerPod and Newton

Today I started out and flatted about 10 minutes walk from home. So I walked the (i)bike home : -) After repair, headed out and noticed zero power unless I really pushed hard. I realized the tilt had gone somewhere South of the border so I stopped and did (fortunately you put it back) a tilt cal the...

Regarding the Velocomputer smart sensor, the entry level does not use their accelerometer and basically is just a very accurate bike computer. And I am not pushing their product per say. What I am suggesting is that they may either license their 1 degree precision tech or supply the sensor as a repl...

Kens said: There's a device out there with a name disturbingly similar to Velocomp that uses two magnets near the hub and a magnetometer to measure the field between them to a claimed 1 degree or 0.01 metres precision. But it is Bluetooth rather than ANT+ and John said that it only measures speed/di...

nsidirop, Your original question, I am strongly impressed, would be in the realm considered iBike proprietary secrets. So the best Zoltan, me and others who are more interested in how things work can do is make analysis based on physics and how the devices such as accelerometers perform in the realm...

andrep, Since I have been tinkering with snapshot Cda since it was first released I will offer some observations that may help you. On my typical rides, coasting downhill, I typically see a range of variability in my 'snapshot Cda' readings. That said, most of the hills on my ride vary in the roughn...

Hi Davis6022, Here are two ancient discussions of that: http://www.ibikeforum.com/viewtopic.php?f=6&t=564&start=0&st=0&sk=t&sd=a and http://www.ibikeforum.com/viewtopic.php?f=4&t=1300&start=0&st=0&sk=t&sd=a&hilit=trainer+formula I don't have a DFPM so have...

Hey EdgarCR, I do not remember if that model has more than one profile memory. If not then you have to download the profile that matches the bike each time you switch. You can go into setup and scroll through, if you find the option for profile (number) you can hit the center button and select anoth...

I do not work with Mac's but I am a Unix admin type. So an idea, if you have the patience and some Unix (Osx) knowledge may be a kludgy workaround. The idea is to start back from scratch as you did when you received the Garmin units, install them and get the Ant stick to work. Next backup all of the...

I had some thoughts today, about this. It occurred to me that this might actually be a feature request. So perhaps I should tell more of what I am interested in. I am not interested in the wobble data being added to the exported CSV file. I am just interested in the higher frequency 16 per second no...

Congratulations of another fine improvement to the product line! I watched the video and read the instructions but have one question. When recording for power stroke at 16 observations per second, does Isaac export the CSV with the 16 per second data? If so,I will buy it for that feature. Since I am...

Please notice my embedded comments to Texmurphy's reply in the quoted section.
Thanks again,
Russ

All magnet triggered odometers require a pass of the magnet over the sensor to assume a wheel revolution. So how to treat a stopped condition and then a restart? Many cyclometers simply treat a magnet pass as a magnet pass and add it to the accumulated distance. Whereas many bike computers instead ...

iBike_03_09_2013_1542_3_km_AP_Measure ib8T.ibr I recently calibrated my odometer on a measured 1.7km course. I have both a Bontrager bike computer that uses ant+ and the iBike Newton both sharing the same wheel and cadance sensors (separate sensors). I do this so I can keep the iBike set to show wi...

Norbike said: "What I have found is that the wind sensor has to be tilt depended (Newton), so I think that it’s not a good idea to unmount the unit " I have also observed, not exactly a dependency but rather an oddly intermittent sensitivity, may be the way to best describe it. I have noti...

This is a shot in the dark (kind of). I do not know osx but I do know unix. So I did a search and some tips in this link (there are several variations of solutions if you read it all) may help (or not). Mostly tips involving locks that are left lying around. Regards, Russ http://arduino.cc/forum/ind...

Kens and Zoltan and all, I am still tinkering along. I found, on the same day of my last cal ride and O&B check, another good check ride. I had gone back over the the 6% hill I have been using and did four high speed coastdowns. I also had walked it once to see if that gave any better hill data....

Yesterday was a better than usual day for wind (I thought, or maybe it was) So off I went for a full set of iBike cal and CD's plus attempts at terminal velocity of two different grades. Note that these 01/05 and 01/12 values are with 'adjusted' selected. These, all three are with 700x32 Gatorskin H...

Just thought I would add a few qualifying comments about the above post. 1. My Cda is higher than in my earlier measurements of .407 or so to .414-.421 depending on my measurement runs. This is due to heavier, looser jersey and insulated legs and new disk brakes on the bike. 2. So I selected a 'targ...

Guys, I guess Kens inspired me and I did another calride today, wind was not too bad so gave it a crack! I found that the windscaling was a teeny bit higher than I have been using but the more worrysome thing about that was a three lap around a large industrial size block for an out and back would h...

Wow you guys are rocking along! This is a great thread, for obsessive tweekers and perfectionists :-) Of course it is also a practical thread for those with bike parameters outside the norm, it seems. Anyway Ken, your work sound both productive and quite impressive! Only additional idea I have is, f...

Zolton, That is a great story of your Cda measurement! I have two son who are now grown but I just picture that! You wrote: "But you should keep in mind that Crr is a function not just of tire pressure and the smoothness and the material of the road surface, but also that of ambient temperature...

A couple of quick tips with the analytic cycling tool above for terminal velocity. The speed answer is the top point of the y axis. Multiply by 3600 to get meters per hour. I extended the time to 150 arbitrarily to extend the plot to make sure the T.V. is achieved. Setting the entry speed near the T...

I have not figured out the picture ordering thing. So rough seem to be top and this (bottom) with smooth in between

Fourth pix goes with above post:

Kens and all, I have done more analysis using analytic cycling...this time with the Terminal Velocity on a Slope tool. This requires no ref to a power meter at all, and seems a tad less finicky than the coastdown method (so far). That said, I am still starting out with the Cda from the photo analysi...

Sorry about the extra pix copies I think retrying in paint.net not sure how I did that.
Edit: fixed the extra pix for a small gift of disk space to Velocomp for Christmas!

Another site that helped with the weather data was this:
http://www.gribble.org/cycling/air_density.html

Russ

Ken, I guess I make it sound a bit simpler and more bullet proof than it is/was :-) But basically, I iterated through this process and my last run with cycling analytic uphill analysis was compared to the ibike for a good match. I will try to upload pix at the end of this post. This is also why I we...

Ken or anyone interested, I have just completed a set of measurements using various methods to arrive at CdA and Crr with confidence. In this case, with 700-32 Gatorskin Hardshells for which I could find no Crr data posted anywhere. Before we get into it, going back to my cal ride and using this dat...

Hi Christian, Just enter setup and scroll ( I usually left scroll) until you get to the profile screen. Assuming you have a Newton there are four different profile memories, just press the center button and then left/right scroll to the number (1-4) that you want to use for the second bikes profile ...

Things are so slow on the forum, thought I would add this post! I am a fitness rider, 66 years old and less motivated for speed since I had a class 3 AC shoulder separation from hitting a dog Nov, 07. That was BPM (before power meter) and I used to average 19+ mph on some 30 mile solo rides. Not any...

I did an experiment, it is possible to screw in the locking screw with the iBike sitting on top of the mount tongue, then it will wiggle. I don't know it that is the problem but if the mount tongue is properly slid into the grooves on the Newton, then it is fairly snug, even without the bolt screwed...