the pictures in your last post aren't showing
Triathlon Forum
Login required to started new threads
Login required to post replies
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [BigBoyND]
[ In reply to ]
I suck at this
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Try imgur for image hosting. Free and easier to use than google
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
i see your pics just fine. you did it right. looks good so far. am interested in the results.
Dan Empfield
aka Slowman
Dan Empfield
aka Slowman
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [Slowman]
[ In reply to ]
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [TriRig]
[ In reply to ]
Just got back from the tunnel... need to crunch the data. Lots of things to figure out. Position changes on the Alpha One were ridiculous. 30 seconds tops.
Big take-aways that really aren't news: P4 doesn't sail well at yaw, Giro Aerohead best for me, I'm not getting much faster than .235 at 0 (full IM livery) no matter what I do.
Super happy that I decided to do a P4 project bike.
More to follow.
E
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Big take-aways that really aren't news: P4 doesn't sail well at yaw, Giro Aerohead best for me, I'm not getting much faster than .235 at 0 (full IM livery) no matter what I do.
Super happy that I decided to do a P4 project bike.
More to follow.
E
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Nice pic .. waiting loop for data and outcome ..
*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>
*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Super cool. Can't wait to see what you found out. Thanks for sharing
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [grumpier.mike]
[ In reply to ]
trying to see if there's any differences here...
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Don’t know why...but a nicely built P4 is the sexiest bike IMO. P5 looks good, but the P4 pic is slayer.
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Your right leg is down more in the second picture, the bikes are different colors, are those kind of differences you’re looking for?
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [sausskross]
[ In reply to ]
Serious questions (not being a smart asre here) - how far up the road can you see with your position + the chosen helmet ? And tied to that, what are the roads like where you train and race ?
(We have some bike-swallowing holes where I live so need a decent distant-view ahead to avoid punctures / smashing wheels / worse).
Btw both bikes are luuurverly.
(We have some bike-swallowing holes where I live so need a decent distant-view ahead to avoid punctures / smashing wheels / worse).
Btw both bikes are luuurverly.
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [BobAjobb]
[ In reply to ]
The gif shows the differences of Mr. EricMPro positions on his bikes ..
*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>
*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [Grant.Reuter]
[ In reply to ]
Lol.
Positional changes that might affect the data. I tried very hard to make the contact points on both bikes the same.
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Positional changes that might affect the data. I tried very hard to make the contact points on both bikes the same.
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [BobAjobb]
[ In reply to ]
Not very far.
Couple of things going on here... first I’m doing my “all in” state time trial shrug and turtle and second, I’m focusing on the same point in the tunnel 10m away in order to keep my head position exactly the same and hopefully keep the data consistent.
(We have some bike-swallowing holes where I live so need a decent distant-view ahead to avoid punctures / smashing wheels / worse).
Btw both bikes are luuurverly.
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Couple of things going on here... first I’m doing my “all in” state time trial shrug and turtle and second, I’m focusing on the same point in the tunnel 10m away in order to keep my head position exactly the same and hopefully keep the data consistent.
BobAjobb wrote:
Serious questions (not being a smart asre here) - how far up the road can you see with your position + the chosen helmet ? And tied to that, what are the roads like where you train and race ? (We have some bike-swallowing holes where I live so need a decent distant-view ahead to avoid punctures / smashing wheels / worse).
Btw both bikes are luuurverly.
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [sausskross]
[ In reply to ]
I honestly think that the difference I’m seeing is due to the 15mm bottom bracket height difference between the bikes.
Thanks for the cool gif :)
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Thanks for the cool gif :)
sausskross wrote:
The gif shows the differences of Mr. EricMPro positions on his bikes ..Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [applenutt]
[ In reply to ]
I agree. I couldn’t pass up the chance to get it. Just sad it’s taken me two years to get it together.
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
applenutt wrote:
Don’t know why...but a nicely built P4 is the sexiest bike IMO. P5 looks good, but the P4 pic is slayer.Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
What's your pad or hand angles?
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [Fishbum]
[ In reply to ]
It’s 15 degrees i think
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Fishbum wrote:
What's your pad or hand angles?Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Because of the 15mm difference in bb drop maybe the back also looks very slightly more bent and therefore is a little more air space under the abdomen on the P4 ..
*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>
*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [sausskross]
[ In reply to ]
sausskross wrote:
Because of the 15mm difference in bb drop maybe the back also looks very slightly more bent and therefore is a little more air space under the abdomen on the P4 ..In addition the BB also moves 2cm back on the P4 as it also goes down (380 vs 400 RC)
I can’t really tell too much difference though except for slight differences in the hands, and already mentioned slight change in back shape.
ETA: Back shape could change slightly due to place in pedal stroke....all things equal should seat be slightly higher on P5???
Maurice
Last edited by:
mauricemaher: Apr 6, 19 21:21
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [ericMPro]
[ In reply to ]
Surprised you're "only" .235 based on eyeball windtunnel. Though maybe I'm biased from looking at the AeroCoach stuff where everyone is somehow sub 0.2 regardless of how they look.
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [trail]
[ In reply to ]
yeah me too... le sigh. That makes me .01 slower than last time, despite a couple "better" items (tires, shoes). OTOH, I did come up 10mm since I'm getting old and can't see. My shoulders also aren't as flexible and the shrug and turtle game is fading. Even so, the data is befuddling me.
Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
trail wrote:
Surprised you're "only" .235 based on eyeball windtunnel. Though maybe I'm biased from looking at the AeroCoach stuff where everyone is somehow sub 0.2 regardless of how they look.Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting
“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.”
Re: Cervelo P4 vs. Cervelo P5: The Definitive Wind Tunnel Test [trail]
[ In reply to ]
trail wrote:
Surprised you're "only" .235 based on eyeball windtunnel. Though maybe I'm biased from looking at the AeroCoach stuff where everyone is somehow sub 0.2 regardless of how they look.Boarman tunnel says I'm ~ .191 long course. My splits and Notio suggest otherwise. More like .215. Lots of low CdA for testers over here. I dont see it reflected in their results though.
At any rate that P4 is nasty.