Just so we are all clear!

[Quicktimederby]

OK guys with the finals coming up, we just want to make sure that everyone is clear on the rules, and how the post race inspection is going to happen. You can see all the rules at www.npwdrl.com I am going to touch on the main ones that like to be stretched. All measurements are to the .0 unless otherwise specified. This will give a little leeway for differences in measuring equipment.
All measurement will be taken before the race except the the wheel weight in the SS classes. The top three finisher in those classes will have wheels removed at the end of the race for weight verification. So if you see your car racing you know you passed everything but the wheel weight. Now you MUST make sure that the wheels can be removed with somewhat of ease. If you glue, or secure your axles in please sent notes and phone # on how you would like us to remove them should you place. We don't want to break any ones wheels by trying to remove them. If no notes or phone # are sent and we can not get the wheels off with out fear of breaking them the car will be DQ'ed. Also if you cars have excessive amounts of lube that sheds onto the track it will be DQ'ed. If you guys have any questions please post them here. Lets have a good enjoyable race.

Examples of the .0
2.0 grams
7.0 inches
5.0 ounces

 

[tmeyer]

According to the rules, cars can weigh a max of 143 grams. How does that fit into the 5.0 ounce example in the previous post?

 

[GravityX]

Bringing this up only because of a potential wheel weight issue for those that make/cut there own wheels. I personally do not cut, turn or lathe my own wheels. My wheels are all purchased from John's store. I have not made a habit of weighing my wheels, is this something I need to be doing or should I be doing? I have never weighed any of my wheels. Just asking. I likely already now the answer to this, I don't want to assume at this point.

 

[GravityX]

According to the rules, cars can weigh a max of 143 grams. How does that fit into the 5.0 ounce example in the previous post?

143 grams equals 5.044 ounces. It still makes the 5.0 ounce rule.

 

[tmeyer]

Would 5.099 ounces make the 5.0 ounce rule?

 

[Quicktimederby]

No. It is measured on a to the tenth a 099 would round to a .1. Now a 5.049 would pass. If it were me I would not come close to pushing the limit there would be no speed gain from a 5.0000 to a 5.049.

Would 5.099 ounces make the 5.0 ounce rule?

 

[tmeyer]

I wasnt planning to change the weight of my cars. They will be the same weight as last month, at or below the 143 gram limit.

I just wanted clarification on the weight rule because I never really understood (until now, I think?) where the 143 gram rule came from being that it is a little more than 5.0 ounces.

Joel, am I correct in saying that a car weighing 5.05 onces will be rounded to 5.1 onces which goes over the .0 rule, which is where the 143 gram rule (5.049 ounces) came from?

 

[Quicktimederby]

Yep

I wasnt planning to change the weight of my cars. They will be the same weight as last month, at or below the 143 gram limit.

I just wanted clarification on the weight rule because I never really understood (until now, I think?) where the 143 gram rule came from being that it is a little more than 5.0 ounces.

Joel, am I correct in saying that a car weighing 5.05 onces will be rounded to 5.1 onces which goes over the .0 rule, which is where the 143 gram rule (5.049 ounces) came from?

 

[DerbyDad4Hire]

The point is this, do your best to stay within the rules! We don't want to DQ people for foolish reasons. The main things you need to do:
[list type=decimal][*]CHECK THE D@MN LENGTH OF YOUR CARS!!!! Sorry, for some reason this is a problem especially with the laser cut cars coming from a couple of vendors.[*]Do not have lube sloshing out of your wheels. If there is some new secret then you are going to have to figure out how to do it without it spraying me in the face when it comes down the track.[*]Avoid wheel cutters that are purposely trying to hash the NPWDRL by giving people wheels that are too light to take out their vendetta on the league we have built from the ground up. 1.94 will NOT pass.[*]Make an easy way to adjust the weight![*]For crying out load, SHIP THEM LIKE YOU CARE ABOUT THEM! If it can move in the shipping box then you are in trouble.[/list type=decimal]
This is going to be a WICKED race. Don't miss this one.

 

[W&K Creations]

just a side question....for the wheel weight checks, do you also often pull the NDFW as well? I know some of us glue those in so they don't move and a rigid...some I think even glue it to the fender....

If the NDFW is fair to pull as well some of us will need to make a few change to make sure its easy to pull but still stable, just in case....

WK

 

[~JBD RACING~]

I know personal there had been people that has glued there wheels & axles. I glue all mine.. But all you gotta do is turn the axle in the k - house groove and it wheel break lose.. If you are fast and legal .. Then shouldn't be any reason that your wheels can't be checked!!! If not DQ.. Far as the lube coming out of the cars .. There was 2 of my cars last month that the paint was messed up and spotted due to a few cars... If there stuff leaking out on there wheels and track DQ them.. It does affect the cars and track. Far as weight none of my cars are close to 143grams there like 142.0-142.4. There is no speed there. I'm glad someone spoke up about all of these matters. It messed 2 of my nicest cars up!! And u wasn't happy about it!

 

[Guest]

just a side question....for the wheel weight checks, do you also often pull the NDFW as well? I know some of us glue those in so they don't move and a rigid...some I think even glue it to the fender....

If the NDFW is fair to pull as well some of us will need to make a few change to make sure its easy to pull but still stable, just in case....

WK

Good question WK.
My guess, from the lack of response to your question, would be that the NDFW is never pulled.

 

[bracketracer]

The point is this, do your best to stay within the rules! We don't want to DQ people for foolish reasons. The main things you need to do:
[list type=decimal][*]CHECK THE D@MN LENGTH OF YOUR CARS!!!! Sorry, for some reason this is a problem especially with the laser cut cars coming from a couple of vendors.[*]Do not have lube sloshing out of your wheels. If there is some new secret then you are going to have to figure out how to do it without it spraying me in the face when it comes down the track.[*]Avoid wheel cutters that are purposely trying to hash the NPWDRL by giving people wheels that are too light to take out their vendetta on the league we have built from the ground up. 1.94 will NOT pass.[*]Make an easy way to adjust the weight![*]For crying out load, SHIP THEM LIKE YOU CARE ABOUT THEM! If it can move in the shipping box then you are in trouble.[/list type=decimal]
This is going to be a WICKED race. Don't miss this one.

With the weights being rounded to the .0, that would mean 1.95g would round to 2.0g? Not that I think there's any speed there, it's just that I have a few wheels that ended up a tad lighter than I meant. I've been shooting for 2.010g on my scale so I have a little margin of safety thinking I needed to be at 2.000 or higher on the race day scale.

 

[Guest]

Hey Bracket,
Long time.
I have been thinking of getting a triple balance.
Any thoughts?
Is this a good way to weigh?

 

[5KidsRacing]

The point is this, do your best to stay within the rules! We don't want to DQ people for foolish reasons. The main things you need to do:
[list type=decimal][*]CHECK THE D@MN LENGTH OF YOUR CARS!!!! Sorry, for some reason this is a problem especially with the laser cut cars coming from a couple of vendors.[*]Do not have lube sloshing out of your wheels. If there is some new secret then you are going to have to figure out how to do it without it spraying me in the face when it comes down the track.[*]Avoid wheel cutters that are purposely trying to hash the NPWDRL by giving people wheels that are too light to take out their vendetta on the league we have built from the ground up. 1.94 will NOT pass.[*]Make an easy way to adjust the weight![*]For crying out load, SHIP THEM LIKE YOU CARE ABOUT THEM! If it can move in the shipping box then you are in trouble.[/list type=decimal]
This is going to be a WICKED race. Don't miss this one.

With the weights being rounded to the .0, that would mean 1.95g would round to 2.0g? Not that I think there's any speed there, it's just that I have a few wheels that ended up a tad lighter than I meant. I've been shooting for 2.010g on my scale so I have a little margin of safety thinking I needed to be at 2.000 or higher on the race day scale.

Just imagine that you are taking all these measurements with a scale that only goes to the tenth of a gram, ounce or inch. Anything that makes that last zero turn to a "1" (or in the case of wheel weight a "9") would not pass.

So if you are reading on a scale that goes to the thousandth a car weight of 5.045 ounce would pass because it would round to 5.0 ounce on a tenth scale, 5.050 ounce would not pass because it would round to 5.1 ounce.

For wheel weigh..... 1.950 (or 1.95) would round to 2.0 on a tenth scale which would pass, 1.940 would not pass. because it would round to 1.9 gram.

Now that being said, trying to get a wheel to 1.950 grams is crazy hard and not worth being DQ'ed.... I can breathe next to the scale and change the weight. I have thrown away far too many wheels by making one more little cut and making them too light. I agree Bracketracer..... shoot for like 2.010.

 

[Quicktimederby]

I thought this was already answered. My bad. Where there is a wheel weight minimum all wheels are subject to the rules, and can be checked.

just a side question....for the wheel weight checks, do you also often pull the NDFW as well? I know some of us glue those in so they don't move and a rigid...some I think even glue it to the fender....

If the NDFW is fair to pull as well some of us will need to make a few change to make sure its easy to pull but still stable, just in case....

WK

Good question WK. My guess, from the lack of response to your question, would be that the NDFW is never pulled.

 

[~JBD RACING~]

I think all wheels should be pulled and checked on weight & width

 

[bracketracer]

Hey Bracket, Long time. I have been thinking of getting a triple balance. Any thoughts? Is this a good way to weigh?

laserman, I have a quad beam balance that reads to .01 grams with a maximum capacity of 310 grams. I don't trust it to weigh wheels anymore. I've related this story before, but what showed as 2 grams on the quad beam checked at 1.87g on the race day scale. No bueno! I have a calibration weight set for it but the smallest weight is 5g. The scale zeroed at both zero and 5g, but it was still off. Might very well be operator error, the pointer hardly moves with each .01g bump. I took the 1.87 gram wheel to the store and found a digital reloading scale that reads to .005 grams with a maximum capacity of 100 grams that showed that same wheel at 1.870g so I bought it! I also bought a set of three small pocket scales that read to .01g with a maximum capacity of 200g that I use to check corner weights but I don't trust them for wheel weights either, the three of them don't always agree exactly. It's such a small weight it needs a quality scale to give a reliable weight IMHO.

 

[tmeyer]

4. Make an easy way to adjust the weight. Originally posted by John (Derby Dad 4 Hire)

I just had an idea that I thought I should share with everyone just in case there are those out there that may have a weight discrepancy between their own personal scale and the official race scale.

Cut out a small section of the tape on the bottom of your car just over the tungsten putty. Then put a small piece of tape over the cutout and mark it with a little painted on "x".

That way if your car is slightly over the weight limit on the official race scale, John or someone else helping out at the race can quickly and easily remove the small piece of tape and a little bit of tungsten putty to bring your car back down to weight so hopefully you will not get disqualified. The little piece of tape will be much quicker and easier for the people at the race to handle as opposed the entire piece of tape that holds the weights in the weight pockets of your car. This will also ensure that your nice and neat tape job, and potentially the position of your tungsten cubes, will not be disturbed by having the entire piece of tape removed and reapplied.

I am going to do this to both of my cars before the upcoming Man of the Mountain Championship race.

 

[Guest]

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