Design report

[Ben Steele]

The rule book states that the design report is due "by" March 1. An e-mail sent a few days ago says that is "due March 1." Can anybody tell me if it is due sometime tomorrow or in 20 minutes?

[Jared Garvey]

As far as I know it is due by midnight tomorrow. We handed it in late on the 1st last year and will likely do the same this year.

Jared Garvey
University of Pittsburgh FSAE (http://www.engr.pitt.edu/fsae/)

[ReadySetGo]

We just turned it in at 7:30pm pacific time, but still haven't recieved a confirmation. It said in the email that a confirmation should be sent after the DR and Spec sheet are obtained. hmm hope they got it...

I think it is due before march 1st. Meaning before feb 28th at 11:59.59secs.

late=0 design points right?

[DJHache]

We submitted ours at 5PM Central time but also didn't receive confirmation. Has anyone received confirmation yet?

[1975BMW2002]

Last year we submitted ours at about 11:00 P.M. the day of. WE didn't receive confirmation for about three days from what I remember. WE finally did get it though. So don't sh*t bricks yet. Wait a few days. That way you have more material, and you get a more solid brick that is much better to build with.

Remember that if you don't know it, don't put it in.

Bill

[jdstuff]

We submitted our report at about 12:05am this morning, and still have not recieved any confirmation either....... http://fsae.com/groupee_common/emoticons/icon_frown.gif

[Ben Beacock]

we got an email saying that the report was unofficially received and an official receipt was coming later. submitted at about 12:30pm today

[tal]

It takes time to get a confirmation...chill

Denny, any chance of seeing the latest "design report images?" If anyone else wants to share please do!!

[Ben Beacock]

I would like to thank Denny for his 'inspiration' of this year's images, but of course I could't get them as neat and clean as his.

Design Report Images (pdf) (http://www.soe.uoguelph.ca/webfiles/uogracing/DesignPics/designimages.pdf)
They also seem a bit difficult to view online but look alot better when printed.
I had some problems in scaling between the drafting and the shaded models, and some artifacts I couldn't fix because it took at least 45mins per shaded image.

[CMURacing - Prometheus]

on the note of design reports, who writes most of yours? Do you have anyone look over them for ease of reading/etc?

I ask partly because I'm an english minor doing an independent study for these reports this semester, and I'd like to see what other teams put into their design reports etc, in the hopes of putting together report guidelines.

Anyone who wants to share reports, I'd be willing to share the guidelines I come up with at the end of the semester.

with regards to images, i'll share these two only, cuz the rest don't seem to be up to par.


http://www.andrew.cmu.edu/~msmiles/headercarinside.jpg This is the header on each interior page.

The other is our design major's body rendering, but I won't share cuz its top secret. He almost had to kill me when I wrote the report.

[Denny Trimble]

Ben,
Nice images, you can see a lot of details of your car.

I'll let Mike T decide if he wants to post this year's images or not, he's the one who spent the days in front of the computer this year.

Anybody else wish to share their images?

[Mike T.]

They're at

http://students.washington.edu/auto/DesignReportImages/2005/

Mike Trumbore

[Buckingham]

Mike,

The images you posted suggest that your driver's head is very close to being outside of the REAR roll envelope (main roll hoop and rear tire). It definitely appears that he is out of the "crash" envelope if you look at the plane between the rear of the frame and the main hoop.

[DY]

I'm curious about the shift lever. It seems like it only clutches when you push the lever (Assuming the top cable is the clutch). Is that right?

[Denny Trimble]

Nope, top cable is shifter, bottom cable is clutch. The delay mechanism allows the clutch to open on downshift before the shift cable is pulled. On upshift, there's no delay, and both cables are pushed. Pushing the clutch cable doesn't do anything.

I wonder if we'll be on the receiving end of a clarification, Donavan. We'll see.

[Nate Notta]

... seems like the Guelph file is no longer working?

[Mike T.]

"3.3 CRASH PROTECTION
The driver must be protected from car rollover and collisions. This requires two roll hoops that are braced, a front bulkhead with Impact Attenuator, and
side protection."

It doesn't clearly state elswhere in the rules anything about how far away from the 'rollover envelope' the driver's helmet must be. Regardless, the images are misleading since our driver model and the driver model per the rules disagree about the length of a 95th percentile male's neck, and per the rules the driver's head is within this envelope by slightly more than 2 inches. If sufficient for the distance to the line formed between the roll hoops, I think it should be satisfactory for rear of the roll hoop. A picture illustrating this has been added to our design report images.

[UofArizonaECE]

Design Report Fun, 900Megs static memory used in solidworks, 1.5Gig (the whole machine) used under load. Had to go find some extra sticks of Ram.

Pics to come.

Jon
UofArizona ECE/StaticEvents Director.

[Wildcat13]

Here are the U of A's design report images. We were rushing to finish a few details and just wrapped it up a little while ago. Let us know what you think of them...

http://formula.engr.arizona.edu/2005.html


Ryan Kanto, Team Captain
University of Arizona FormulaSAE
"Drive It Like You Built It!"

[Denny Trimble]

Nice wheels... http://fsae.com/groupee_common/emoticons/icon_smile.gif
http://students.washington.edu/dennyt/wheel_small.JPG

[Wildcat13]

http://formula.engr.arizona.edu/nicER_wheels.jpg

(This is our manufacturing director, his name is Dustin, he's special)

(He's excited that our wheels have 3 less fasteners and NO NUTS!!!)

[Underthefloor]

Hey Mike T.

Those are some sexy drawings.

[Evan]

Denny:

Quick question:

With that shifter setup, how do you get the car rolling from a stop? I assume you still use the 1st gear, so it's a downshift from neutral to first (and the clutch disengages), but are there any clutch modulation issues with the release needed to take off?

I'm not questioning the design; I'm certain you guys have it worked out, I'm just curious.

Once again nice images of the car... so much detail.

-Evan Martin
Ryerson FSAE

[Ben Beacock]

Originally posted by Nate Nantais:
... seems like the Guelph file is no longer working?

i moved it somewhere more stable now
Design Report Images (pdf) (http://www.soe.uoguelph.ca/webfiles/uogracing/DesignPics/designimages.pdf)

[Denny Trimble]

It's pretty funny to watch people drive with that shifter the first time (we've used it since '98). There's about 1/4" to 1/2" of clutch modulation travel at the lever, so it takes some time to learn it. But, once you get it, it's fast. Just a little release of the fingers and off you go.

The only drawback is that you can't get the car back into neutral while the engine is on, but we don't expect to be sitting at many stoplights. And, it doesn't take much to hold the clutch in for a minute or two if need be (endurance line...)

[Rob Davies]

Washington,

Just wondering if you havent included a jacking bar or if you are going to use the bar that the suspension mounts to. If you are it seems a bit short.

The jacking length bar rule kind of screwed with our design so I know all about it

Just wondering, Rob

[drivetrainUW-Platt]

I have seen a few drawings now where ppl have drawn the internal stock gears for the torsen...I was curious if you were able to do this in Solidworks Student edition using a gear feature, or were they imported from another program. If not done in solidworks, I would appreciated it if I could get ahold of those gears.

[Denny Trimble]

I know "gear mates" are relatively new and useful, but I wasn't aware of a gear tooth feature or anything like that.

One of our guys modeled the OD of the gears as simple cylinders. He didn't model the teeth.

He looked at the pressure / helical angles in detail to find the forces on the housing, though.

[DJHache]

We just got our confirmation for our design report. I guess everyone should be getting their confirmation soon.

[Matt N]

What Denny means by the shifter being "funny" is that new drivers (I was/am? one) repeatedly stall the car. Takes some learning a 6000 rpm clutch slip start, especially when the release is in the last 1/4" like he said.

Very easy to shift underway though, both up and down.

Matt

UW Engine/Exhaust '05

[fade]

denny did you have any probs w/ tech about the # of threads showing on the wheel nuts?

[Denny Trimble]

Good eye, I actually replaced those with longer bolts after the first assembly.

And if anyone is still wondering about our jacking bar, we'll be tacking on an additional jacking tube that meets the rules like last year.

[osubeaver]

Wildcat13,

I love the "cool stuff" image. The blowup of the engine is soooooo sweet. Love the dry sump exploded view. Good job.