carleton

Nailed it.

Baby Puke

Sounds like it's in the key of C and just one octave, Carleton.

carleton

Got it. Thanks!!

noglider 

Exactly what is a rider allowed to have and not allowed to have on the bike, on the body, and in the jersey?

Have you considered wifi instead of Bluetooth? Range is better.

carleton

In most (if not all) local races, computer head units (and iPhones mounted properly as head units) are allowed. Only in official big USA Cycling and UCI events are head units not allowed. They can be installed on the bike, but in a manner where the rider cannot read the screens. Some people mount under the seat or under the stem. Some put tape over the display.

I think my tool will be more for training than big USA Cycling or UCI events.

The coaches in the infield can use whatever they want.

WiFi is definitely an option for the transmitter. I just need to figure out what will be transmitted and how to parse it

noglider 

Right. A racer's GPS fell off her bike during a race, which is, of course, a faux pas. One of the officials said, "No Garmins," and I wasn't sure if he meant no devices on the handlebar or no devices at all. From then on, I hid mine in my jersey pocket, which seems safer than mounting it on my seat post.

carleton

A better response would have been to have the riders make sure everything is secure on their bikes.

The jersey pocket isn't a good solution. I don't think people should have anything in their jersey pockets. I've seen cellphones, water bottles, and car keys hop out of jersey pockets.

The reason why the UCI bans computers is because people will use them as a pacing device (remember, they want us all to be Eddy Merckx). USA Cycling follows UCI's lead. If you want any record set at a USA Cycling event (elite, jr, collegiate, masters nationals) to be recognized by the UCI, you have to follow UCI rules.

noglider 

All true!

carleton

UPDATE:

I'm working on having options for:
- Nominal Imperial (gear inches of development, i.e. 50t/15t = 90"
- Ratio (50t/15t = 3.3)
- Metric (gear meters of developemnt)

In the US, rider in the infield will use the following to calculate "gear inches"

50t/15t = 27*50/15 = 90.0

What value (instead of "27" above) do the Euro riders use to calculate gear meters?

noglider 

The English/American way of calculating gears should not be called development because it refers to effective diameter, not movement.

With that said, I think having the three options is a good idea. I don't know what factor they use for diameter to convert to development. It might be something close to 26.5 inches since racing tires are pretty small.

carleton

Yeah, unfortunately (as I'm sure you know) how we calculate gears in the US is using "27 inches" which is left over when when wheels were actually 27 inches. The reason it still works is that the values are relative to each other. Which brings us to the "Actual Gear Inches vs Nominal Gear Inches" debate. I have never met a trackie that uses actual gear inches when they speak or in their personal calculations. Everyone still uses inches (using 27), ratio, or meters.

But, I could be wrong (as I often am).

carleton

So, from reading a bunch if websites, it seems that those who calculate "gear meters" use the constant of 2.1 in their calculations.

50t/15t = 2.1*50/15 = 7.0 gear-meters is the same as 50t/15t = 27*50/15 = 90.0 gear-inches

I know it's not perfect, but it's a relative measure that we use when communication amongst each other.

Can anyone confirm that the "rule of thumb" constant for calculating gear-meters is 2.1? If no one corrects me, 2.1 is goin' in the app

noglider 

I say go with it. You can always change it later or even make it user-configurable.

My point was about grammar. You should not use the word development when expressing effective diameter. Europeans use development; Brits and Americans use diameter. There is a direct (times pi) relationship, but they are different.

carleton

Ah. I see what you mean.

carleton

I'm sooo close to finishing....

Baby Puke

Japanese riders just use the ratio to communicate gear size.

carleton

I got that covered

I'm testing it all right now.

carleton

So I made not only 1, but 2 apps

Due to forum rules, I'm putting the information about the apps in the Marketplace forum. But we can continue to discuss them here.

Thanks so much for everyone's suggestions and feedback! Keep it coming.

https://www.bikeforums.net/sale/97588...-training.html

(I feel like deserve a cookie. I'm going to get some cookies right now.)

Quinn8it

Got them both last night! Looks awesome Carleton!

Including your road drive-train in the gear inventory was a cool touch!!

carleton

Thanks! The road drive-train was Dancel's idea

Bulldogsprinter

I like it, but you could add some bigger chainrings. I run a 57

carleton

Really? Road or track?

If you are serious, I will. I've never seen a 57t.

Bulldogsprinter

Track, use it for flying 200s 57x15 and 57x14 are actually quite usefull, also theoretically gives you less drivetrain friction. Just last week in windy conditions and sub 10 degree weather, I was able to do sub 12 second 200s.
I do think you need to go custom to get 57s or bigger, mine are Gebhardt, but I think Yobi from Hungary might be able to do some special order CNC track rings.

carleton

OK. I'll add track chainrings up to 57t for the next update

Hida Yanra

woooofff, that's pretty good sized- I've seen plenty of track frames in Small and Medium sizes that absolutely wouldn't fit a 57t.