wheelbase mesurement rule 6.4

[DwaneO]

I don't have a prob with this rule but I do have a question. A lot of us have a WB jig set at 12 1/2" that we mount our axles in and build our rigs and links from there. How do you do that now? Do we need to change our jigs to 12" so we know were good now? And winching down is legal still what about that? Does the guy winching down have to winch all the way down at tech to make sure he isn't over 12 1/2"?

The rule doesn't say anything about winching down at tech.
Set your truck on the table , push it down to max compression and let go , measure it. DONE

 

[JPH Racing]

Im sorry and even though I wont be comping Rock crawlers anymore. I think its great that the rules committee worked hard to getting a resolve for issues in the past and make the rules so they would be uniform.

In the other respect. Someone should of looked at the affect of production parts for vendors where as some of the rules might hurt the pocketbook.

I'm sure its something that can easily be rectified. But never the less one should always take into consideration the cause and effect of a rule and the outcome it will have to the guys who help sponsor drivers and competitions.

This isn't a gripe or a flame war. just offering my opinion. I realize its hard to work rules to the point of avoiding future situations. But like the saying goes, if there is a rule, there is always someone that will find away to cheat it.

Good luck guys

Actually, it's a debate on who's driving this cart? Do the MFG's have a say in what the rules should be? (for their own benifit?) Or does USRCCA set the rules and the MFG's build parts to be within the rules? (so that it's a level playing field for all the MFG's?)

 

[JPH Racing]

WRONG! It wasn't even mention, and 0% to do with method chosen

Can you tell me where I can find the definition "Static ride height", or are you just making one up that fits your preference?

100% to standardize tech procedure from event to event.

The were 3 sides to this debate.

1) There was the truck shouldn't go over anytime during the suspension cycle group.

2) There was the let me carefully place my truck on the table group.

3) I just want everybody to tech the same group.

For everyone in Group 2 there was at least one in Group 1

The majority had mixed feelings, and was more interested in everyone doing the same, so we COMPROMISED "thumbsup" It still follows what the rules actually said, but keep the extnding wheel base during a dig in check.

I'm sure you guys struggled / debated this rule a ton before coming up with a decision! Thanks for the hard work (volunteered at that!) and I'm hoping that all the debating is not taken personally and not wearing you guys out too much!

 

[yotachump]

What was the OFFICIAL method of tech before?

The answer is there wasn't one.

I have been to almost every major comp the was over the last 3 years, had my truck teched at least 4x diffrent ways.

Thats because in the rules before it never stated how to tech. it deosnt get any easier then setting your truck on the table and measuring the WB. I bet every truck goes out of spec sometime during a run. I dont see how the new rule solves anything. if anything it caused more problems for the people who make RC crawler parts.

So now does axial have to remake there RTR trucks to pass tech?

 

[punkuup5150]

Thats because in the rules before it never stated how to tech. it deosnt get any easier then setting your truck on the table and measuring the WB. I bet every truck goes out of spec sometime during a run. I dont see how the new rule solves anything. if anything it caused more problems for the people who make RC crawler parts.

So now does axial have to remake there RTR trucks to pass tech?

Good Point!"thumbsup"

 

[KBrog]

Just make it easy. The truck will not go over 12.5 at any time. Tech it at the top, middle, and bottom of travel. Done.

 

[roksloski]

for you fishy,


"supported by its own weight". from dpdsurf above...

Physics. acting by mere weight without producing motion: static pressure.

these two go hand in hand.....

 

[JeremyH]

A lot of us have a WB jig set at 12 1/2" that we mount our axles in and build our rigs and links from there. How do you do that now? Do we need to change our jigs to 12" so we know were good now?

Now come on....use your brain a little bit here. Rules shouldn't be set a certain way because people already have parts build...they should be set to level the playing field. If you still want to use your jig, just set up your shocks for full droop, then build your lower links to fit, then add the springs to the shocks....then build your upper links.

 

[punkuup5150]

please go do this and return with your results, if it works like i beleave it will depending on your shock and chassis setup your going to have a ground clearance of well over 4 inches. and have terrible cog.

 

[JeremyH]

Wow....do you really need someone to hold your hand while building your RC? Building it and figuring out what works and what doesn't is half of the fun....


If you want to compete, follow the rules....

 

[joesbruiser]

I must say this rule will not level the playing field at all.
Me personally I will build a truck that works the best I can and fit within the rules.
No matter which way the vote went out of the options the rules committee had to decide from there would have been a group of people/type of rig that would have to rebuild.Yes that sucks.I know I have to rebuild what I think is the best rig I have ever owned unless I want to run a 12.175 W.B.
But I know I am not going to run it that way when there are some guys/chassis builders that have figured how to make a truck with lots of G.C. that rebound all the way after cycled but still flow like mine.Those trucks can run 12.5 and stretch from there.
It just means I am going to have to get to work to keep up.

 

[punkuup5150]

your giving bad advice im just pointing that out

 

[JeremyH]

your giving bad advice im just pointing that out

:roll:

There is nothing wrong with building links using the method I listed above.

 

[jfraymond]

Wouldnt it just be a simple solution to remove or back your wheel nuts off so the wheels aren't on the hex for the suspension cycle part? then it will freely return to your actual ride height without having to worry about drivetrain drag messing up a accurate measurement.

 

[joesbruiser]

Wouldnt it just be a simple solution to remove or back your wheel nuts off so the wheels aren't on the hex for the suspension cycle part? then it will freely return to your actual ride height without having to worry about drivetrain drag messing up a accurate measurement.

I think they are trying to tech the trucks at the point were most rigs will live there life on the course.
But I do know if I had a shaft truck I would have the dig in free wheel when going to tech.

 

[punkuup5150]

:roll:

There is nothing wrong with building links using the method I listed above.

really? id love to see this work. please take pics and document it because i dont think this is true. im calling shennigans on that one

 

[JeremyH]

Well, you call what you want. Not everybody builds crawlers using jigs. There was a time in this hobby when you could not buy pre-built links and people had to actually think about what they were doing to make their truck work well.....I guess that has passed.

 

[dpdsurf]

Just make it easy. The truck will not go over 12.5 at any time. Tech it at the top, middle, and bottom of travel. Done.

Though some made this same point it is not as simple as you imply. Using this method with a sprung vehicle will in the end give you a rig that drives at under 12.5". I have not seen any vehicle that digs to the point of bottoming the suspension. So now you've shortened the effective WB. Now every fun climb you barely concured at your favorite crawl spot may not even be possible anymore. All the setup and course building knowledge would have to be relearned and adjusted for. Sure it would all be forgotten over time and we would adjust, but I feel it would be a step backwards if we reduced the capabilities of our rigs by reducing the effective WB.

 

[jammin311]

Though some made this same point it is not as simple as you imply. Using this method with a sprung vehicle will in the end give you a rig that drives at under 12.5". I have not seen any vehicle that digs to the point of bottoming the suspension. So now you've shortened the effective WB. Now every fun climb you barely concured at your favorite crawl spot may not even be possible anymore. All the setup and course building knowledge would have to be relearned and adjusted for. Sure it would all be forgotten over time and we would adjust, but I feel it would be a step backwards if we reduced the capabilities of our rigs by reducing the effective WB.

x2"thumbsup"

 

[Destroyer]

Though some made this same point it is not as simple as you imply. Using this method with a sprung vehicle will in the end give you a rig that drives at under 12.5". I have not seen any vehicle that digs to the point of bottoming the suspension. So now you've shortened the effective WB. Now every fun climb you barely concured at your favorite crawl spot may not even be possible anymore. All the setup and course building knowledge would have to be relearned and adjusted for. Sure it would all be forgotten over time and we would adjust, but I feel it would be a step backwards if we reduced the capabilities of our rigs by reducing the effective WB.

I would have liked to see the rule be the "never exceeds 12.5" way. Gives drivers a choice, either build a low truck with a true 12.5" wb or a taller one with a shorter wb that can extend to 12.5". It's called a COMPROMISE, as many things in crawling are. Same as running a narrow truck that can have more options thru gates with less stability or a wider truck with less gate options and more stability.