"There's exactly 2cm of spacers between the top of the HT and my stem."
Which to my mind is a fair bit...
"During the season, I drop the spacers and race right against the top of the HT. I'll just note that the bottle I've designed works with this variation in mind (i.e. it's not 15cm tall). "
OK.
"Some riders will have no stack and others will have 4-5cm. Either way, the stem is still ~3cm tall and your arms are above that. "
Not necessarily.
"The air going around the stem and bars is just as bad (if not worse) than just going around a cylinder. "
Not sure how this is relevent, and your position (minus the fairing) seems to include both...
"Also note that this is a 1" HT (not 1 1/8") and you'd expect a proportional change to the drag given a wider HT. "
Sure. Again, relevence?
"I do plan on testing with the stem/bars in varrying heights due to stack -- I'll let you know when it's done. Should be interesting to see the change, but I really don't expect much of one."
OK - care to expand on this? What do you think is causing the reduction in drag you cite, and how would this be independent of positional changes that have a direct effect on airflow in the area of the bike you are manipulating with your fairing application?
Aren't you, in effect, replicating the design of, eg, a Look style front end, by fairing the stem area of the bike into the top tube?
"Just the way the cable housing bends when you move stuff around changes the drag a ton. It's really incredible. "
Yup.
"Thanks for the note -- I hope to give you more conclusive data in the future. "
You're welcome, and thank you.I look forward to the data.
.
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit - http://source-e.net/ Cyclocross blog - https://crosssports.net/ BJJ instruction - https://ballardbjj.com/
Which to my mind is a fair bit...
"During the season, I drop the spacers and race right against the top of the HT. I'll just note that the bottle I've designed works with this variation in mind (i.e. it's not 15cm tall). "
OK.
"Some riders will have no stack and others will have 4-5cm. Either way, the stem is still ~3cm tall and your arms are above that. "
Not necessarily.
"The air going around the stem and bars is just as bad (if not worse) than just going around a cylinder. "
Not sure how this is relevent, and your position (minus the fairing) seems to include both...
"Also note that this is a 1" HT (not 1 1/8") and you'd expect a proportional change to the drag given a wider HT. "
Sure. Again, relevence?
"I do plan on testing with the stem/bars in varrying heights due to stack -- I'll let you know when it's done. Should be interesting to see the change, but I really don't expect much of one."
OK - care to expand on this? What do you think is causing the reduction in drag you cite, and how would this be independent of positional changes that have a direct effect on airflow in the area of the bike you are manipulating with your fairing application?
Aren't you, in effect, replicating the design of, eg, a Look style front end, by fairing the stem area of the bike into the top tube?
"Just the way the cable housing bends when you move stuff around changes the drag a ton. It's really incredible. "
Yup.
"Thanks for the note -- I hope to give you more conclusive data in the future. "
You're welcome, and thank you.I look forward to the data.
.
Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
Coaching and bike fit - http://source-e.net/ Cyclocross blog - https://crosssports.net/ BJJ instruction - https://ballardbjj.com/