bracketracer said:
It's true! Evidence:
I posted a pic of my car "Firewater" on FB.
BTW Bracket, it does sound very much like your boys' cars are set to dominate!
Almost time for the Pack race!
- Thread starter bracketracer
- Start date
It's true! Evidence:
I posted a pic of my car "Firewater" on FB.
BTW Bracket, it does sound very much like your boys' cars are set to dominate!
Thanks for the vote of confidence but don't forget there are a lot of guys around here in the aerospace industry. Lots of smart guys. I even heard stories of a few PWD cars going through the wind tunnel at Boeing! We came up about .030-.035 short last year, I think I have at least that much back but the Pack track is different than mine so it's still a bit of a guess.
G
Guest
Guest
Hey Crash,
What is that finish under the flames?
A PWD car in a Boeing wind tunnel!!!!
Man! I wanna see that video. Those guys really take stuff seriously out there.
Over in NY I can't even get a clear set of rules. The rules are more about suggestions on how to build the car than anything else. I think I can do whatever I want to with the wheels, except for "speed wheels" (razors). Pretty sure I have to keep the wheel base the same without even cutting off the back and sticking it up front, but I can't really get an answer on that. I have a feeling that my nephew will get DQed so I might just bring my entire quiver to the race. One of em has to be legal!
There is no workshop, or even a meeting about the PWD beforehand.
Too bad about no canting. That rule makes no sense to me.
I would take a BR over an aerospace guy any day in the PWD. Try to get video of yourself while the cars are racing. Your body language, contorting yourself to "will" the car faster would be priceless.
What is that finish under the flames?
A PWD car in a Boeing wind tunnel!!!!
Man! I wanna see that video. Those guys really take stuff seriously out there.
Over in NY I can't even get a clear set of rules. The rules are more about suggestions on how to build the car than anything else. I think I can do whatever I want to with the wheels, except for "speed wheels" (razors). Pretty sure I have to keep the wheel base the same without even cutting off the back and sticking it up front, but I can't really get an answer on that. I have a feeling that my nephew will get DQed so I might just bring my entire quiver to the race. One of em has to be legal!
There is no workshop, or even a meeting about the PWD beforehand.
Too bad about no canting. That rule makes no sense to me.
I would take a BR over an aerospace guy any day in the PWD. Try to get video of yourself while the cars are racing. Your body language, contorting yourself to "will" the car faster would be priceless.
Very nice flames Bracket! I just finished helping my son do flames on his using a stencil with adhesive. I have one left and you've got me thinking I should use it to cut out card stock stencils instead to give us more versatility.
bracketracer said:
I can vouch for that. 2 years ago my son't car got knocked off the staging table not once but twice!
I was scrambling under chairs trying to collect all of the weights and put a wheel back on right before the start of the race. Then it happened a second time and I pretty much came unglued as I was trying to glue stuff back into place (grrr).
laserman said:
A poorly done "Water droplet" paint effect.
Here's a How-to vid:
[video]https://www.youtube.com/watch?v=sbnTpJQPOTs[/video]
I just got an email from the fellow that runs the derby this morning. We just had a "clarification" of the rules. They originally said: "The car must have four wheels, free spinning on axles, in the normal vertical position, with axles installed in the precut slots, but it is not required that all four wheels contact the track."
Now they read: " The car must have four wheels, free spinning on axles, in the normal vertical position, with axles installed in the precut slots. No wheel can be raised so the car rides on the track with only 3 wheels touching."
And it's two days to the test & tune! Great! /images/boards/smilies/smile.gif
Now they read: " The car must have four wheels, free spinning on axles, in the normal vertical position, with axles installed in the precut slots. No wheel can be raised so the car rides on the track with only 3 wheels touching."
And it's two days to the test & tune! Great! /images/boards/smilies/smile.gif
The vaguery of the the vagueness is vaguifying.bracketracer said:
So, with these new rules, is it still not required to have all four wheels contact the track? Does "normal vertical position" then mean that the wheels have to be running flat?
G
Guest
Guest
LOL!!!
Good thing you like a challenge eh BR?
Man! Someone knew how to throw you a curveball in the 9th inning.
My guess is that the guy that takes second place was responsible.
Oh and BTW BR,
If you need any of those test and tune tickets for the 24th...
I know a guy that knows a guy.
Good thing you like a challenge eh BR?
Man! Someone knew how to throw you a curveball in the 9th inning.
My guess is that the guy that takes second place was responsible.
Oh and BTW BR,
If you need any of those test and tune tickets for the 24th...
I know a guy that knows a guy.
OK, I moved what was the NDFW down in the slot to make it touch.
And we lost nearly .050 sec.
I spent almost 2 1/2 hours retuning it so it's only slower by .020 now. Or on a positive note, it's still .040 quicker than the car he made last year. I hope that's enough!
And we lost nearly .050 sec.
I spent almost 2 1/2 hours retuning it so it's only slower by .020 now. Or on a positive note, it's still .040 quicker than the car he made last year. I hope that's enough!
I know it takes a while, but one thing I'd do was to make that NDFW barely touch. So when it went through the roll check the wheel would turn but it's just barely touching and you could actually turn it with your finger while the car was at rest. I know everyone rails on using bent axles, but when you're using slots and are supposed to have all 4 wheels flat, it's hard to get by with drilled bodies that have 30* of camber in the rears with straight axles. So we'd put a little bend in them so that they'd just ride the inside edge and still allows for the wheels to migrate out to the head all while still looking pretty flat. It's nearly impossible to get the toe dialed out but I'd accept that as long as the wheels migrated out when going forward and not aggressively migrate in when rolling backwards, it'd be about as good as it was going to get.
That's pretty much where I ended up. When it's sitting on a flat surface you can wiggle what was the NDFW and it's loose, there's no weight on it. It's just resting on the ground. I barely bent a spare axle and tried that last night. It didn't seem to like that so I put the straight axle back in and tweaked it up and down until it was floating. I think I'm right on the edge of not having enough steer but our "test & tune" is tomorrow so I'll leave it as-is and see if it's wobbles. I can always dial a bit more steer in if I need to after the first run.
We had our test & tune last night. Darn car looked a little loose in the rear. The front wheel stayed on the rail, but the tail is wagging. It really needs more cant but they wouldn't let that fly, the rear wheels barely sit flat now.
On a bright note, when I asked about ditching the crash box stop section and replacing it with a better one, he said he thought it was a good idea! So I volunteered to build it. It looks like I also volunteered to set up the timer to work with GPRM software for next year (they are using an Excel spreadsheet for scoring now). And we're going to look at automating the start gate before next year too.
On a bright note, when I asked about ditching the crash box stop section and replacing it with a better one, he said he thought it was a good idea! So I volunteered to build it. It looks like I also volunteered to set up the timer to work with GPRM software for next year (they are using an Excel spreadsheet for scoring now). And we're going to look at automating the start gate before next year too.
Stephen, what are the rear wheel gaps? Maybe you could tighten them up a little to minimize some of that wobble.
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