So far, yes it is by a bit, but keep in mind we're limited by some rules that FSAE doesn't have. Plus, we're not donemiqi23 wrote:Breezy, is that more than your design?
I don't know about ride heights in terms of standard measures, but their tray was less than 2" off the ground. It wasn't my team, but I know they broke their tray in the wind tunnelBreezyRacer wrote:AeroAeroGT3 wrote:I know a team that achieved similar numbers for a fact with their tray. It's possible. It's just hard to do.
Do you know what ride heights they were basing this on? While we're at it was it pitched? Inquiring minds want to know ..
I fully agree. My favrorite is the use of super cool aluminum honeycomb. Then when the tray is mounted it de-lams almost instantly!BreezyRacer wrote:AeroGT3 wrote:I don't know about ride heights in terms of standard measures, but their tray was less than 2" off the ground. It wasn't my team, but I know they broke their tray in the wind tunnel
Yeh, I 've seen some pretty flimsey trays. I understand that everyone wants to use honeycomb cores 'cause they are trick but without excellent fab capabilities and great moulds it just ain't gonna turn out well. I'm usin finnish plywood for a core. The weight is not at all significant, especially considering when you slam pylons, etc.
It's UTA. UMR only runs wings IIRC.BreezyRacer wrote:When you say you know one team that pulled those numbers, you must be referring to the Missuori team? Are you sure those numbers aren't for the full aero package.? I just don't see it.
Those are low numbers as far as trays go. What's a 5 by 2 foot tray make if it lower the pressure by 0.1 Psi? 144 lbs.Just to put the numbers into perspective, that would equate to 200 lbs at 70 mph and almost 400 lbs at 100 mph, plus or minus. That's amazing for a tray that's only 5 or so foot long.
Our design is not yet finished, but a preliminary test piece did 65 lbs @ 40 MPH. And believe me, it was definitely a "test" piece used to gather data more than produce DF.Please don't misunderstand .. I'm not disagreeing with you per se, and it sounds like you've been around a bit .. what kind of numbers were you able to pull with just the floor of your school's design? I know you're pretty happy with those results. How close to these numbers are they?
UMR runs a tray as wellAeroGT3 wrote:It's UTA. UMR only runs wings IIRC.BreezyRacer wrote:When you say you know one team that pulled those numbers, you must be referring to the Missuori team? Are you sure those numbers aren't for the full aero package.? I just don't see it.
Those are low numbers as far as trays go. What's a 5 by 2 foot tray make if it lower the pressure by 0.1 Psi? 144 lbs.Just to put the numbers into perspective, that would equate to 200 lbs at 70 mph and almost 400 lbs at 100 mph, plus or minus. That's amazing for a tray that's only 5 or so foot long.
Our design is not yet finished, but a preliminary test piece did 65 lbs @ 40 MPH. And believe me, it was definitely a "test" piece used to gather data more than produce DF.Please don't misunderstand .. I'm not disagreeing with you per se, and it sounds like you've been around a bit .. what kind of numbers were you able to pull with just the floor of your school's design? I know you're pretty happy with those results. How close to these numbers are they?
That statement makes it sound like any 5 year old can do this. Let's not take for granted the work it would take to get that tenth PSi reduction. Tant easy ..AeroGT3 wrote:Those are low numbers as far as trays go. What's a 5 by 2 foot tray make if it lower the pressure by 0.1 Psi? 144 lbs.Just to put the numbers into perspective, that would equate to 200 lbs at 70 mph and almost 400 lbs at 100 mph, plus or minus. That's amazing for a tray that's only 5 or so foot long.
Don't know if I will though haha.
What about the gills on the endplates to reduce turbulence if you are using a wing that big anyway? How about wing twist etc, they do work bigtime...