Is this chassis comp-legal

[JK1]

I stumbled upon this japanese chassis in the net:
http://crawling-mania.com/jp/modules/pico/index.php?content_id=11
But is it comp legal?

Heres a video:
http://www.youtube.com/watch?v=FptHAKRLzs0

J

[punkuup5150]

interesting! i have no idea to tell you the truth lol but i plan on watching the video when i get home tonight

[Code454]

yea thats hard to say, you definetly need a body but still, those guys always build crazy rigs and that one is just nuts

[Hurley0706]

It's basically just a rip off of the Mantis Chassis but with really poor link geometry.

It is legal as long as you put a body on it. The suspension geometry looks horrible though. I would pass on it for sure.

[crashfab]

Looks awful IMO

[helhedded]

If that rear shock mount moves then it is not comp legal. I can't tell by looking and I can't read the language.

I would assume it doesn't.

[JK1]

The rules say:
• 2.1.5 - All suspension mounting points must be fixed mounted. This includes all link mounts, and shock mounts.

helhedded, the rear axle is solidly mounted to the rear of the chassis, but it has a moving part in the front where the shocks are attached. So technically that is not the exact point where the shock is mounted... Those japanese have crazy ideas! Anyone know if they have different rules there?

J

ps. heres one more pic:

http://crawling-mania.com/jp/modules/pico/index.php?content_id=12

[helhedded]

this is the area of concern that I was talking about.

[JK1]

this is the area of concern that I was talking about.

Yes, thats the front, and there is a pivot in that red circle.

J

[helhedded]

Yes, thats the front, and there is a pivot in that red circle.

J

ahahaha I couldn't tell the front from the back of that weird thing. That pivot point will make the chassis illegal because it isn't "fix mounted." IF IT MOVES. It probably doesnt and this post along with my other is an example of time wasted at work "thumbsup"

[53 willys]

is that just 2 zip ties holding the shock mount on??

[Tanis]

ahahaha I couldn't tell the front from the back of that weird thing. That pivot point will make the chassis illegal because it isn't "fix mounted." IF IT MOVES. It probably doesnt and this post along with my other is an example of time wasted at work "thumbsup"
It does move, that is how it gains all the belly clearance at the end of that vid to clear that ledge.

[53 willys]

just watched the vid....takes an interesting driving technique with that rig...:shock:

[Jeepial]

It's basically just a rip off of the Mantis Chassis but with really poor link geometry.

It is legal as long as you put a body on it. The suspension geometry looks horrible though. I would pass on it for sure.

This chassis doesn't look even close to a Mantis chassis...Not sure how it could be a rip off.And for having poor link geometry it sure seems to crawl well..I think it is very cool looking for sure.I would consider trying one if it used a sprung set up out front.I'm not much on droop set ups,but it seems to fit in well with the low slung Japan style crawlers.

[helhedded]

It does move, that is how it gains all the belly clearance at the end of that vid to clear that ledge.


thanks man, I cant watch videos at work so I had no idea "thumbsup"

[jamesdicken]

very creative! crazy belly clearance when it sucks the axles together!

[NeXt559]

wow the japanese really love their belly draggers
first it was the yss clinger that mad an apearance at the nats last year now this.

[Hurley0706]

This chassis doesn't look even close to a Mantis chassis...Not sure how it could be a rip off.And for having poor link geometry it sure seems to crawl well..I think it is very cool looking for sure.I would consider trying one if it used a sprung set up out front.I'm not much on droop set ups,but it seems to fit in well with the low slung Japan style crawlers.

We don't want to leave it to you do decide when a chassis design is unique......


Solid/torsion mount rear with a 4 link sprung (or droop it doesn't matter) front. As far as crawling well...it looks inconsistent to me. It does look like it fits the Japanese style, obviously. But if you would have seen how those rigs worked on our typical courses you could tell that they are not very capable here. It is also easy to make something look good in a video when you use 10 hours of film to edit it down.

[JeremyH]

We don't want to leave it to you do decide when a chassis design is unique.....
:mrgreen:

[69CrazyHorse]

It kinda looks like an Active Hobby setup.

http://www.rccrawler.com/forum/showthread.php?t=178467&highlight=japan

[Jeepial]

We don't want to leave it to you do decide when a chassis design is unique......

You mean you.:|.Well I guess you could have a mouse in your pocket.8).But don't trip Harley...I don't want your job.."thumbsup"

[jetboat]

am I the only 1 that noticed that it looks very LOOOOONG... Unless those are some tiny tires Im thinking it cant be within WB limits

[R2j]

am I the only 1 that noticed that it looks very LOOOOONG... Unless those are some tiny tires Im thinking it cant be within WB limits


X2 on that. Also the wheel base changes when the belly clearance changes. Sucks the wheels closer together.

[CrawlMater]

it is very similar to a mantis for sure just sloppy twitchy flex. At low speeds and on a consistent surface it would work well i'm sure. But Bullys' are fast and big rocks get boring.

[Tanis]

X2 on that. Also the wheel base changes when the belly clearance changes. Sucks the wheels closer together.
It's probably 12.5" WB....if you pick it up in the middle. So, when you go to tech it, you just make sure you hold it up in the middle and gently set it down on the table:-P

[R2j]

Rules state......

3.8- The vehicle must run a course entirely with the same wheelbase, track width, ride height, and tires it started that course with. Any changes to the vehicle( other than winching down the suspension or forced articulation) by the driver, another person, or any devise, while on course are prohibited.

[Hurley0706]

Rules state......

3.8- The vehicle must run a course entirely with the same wheelbase, track width, ride height, and tires it started that course with. Any changes to the vehicle( other than winching down the suspension or forced articulation) by the driver, another person, or any devise, while on course are prohibited.

This is a touchy gray area. Yes you are reading it correctly but if someone wants to question it and say it's out of spec than it is tech'ed in the same way as it was initially. So it would again be in spec. We can't tech people while they are digging and stretching their wheelbase out. Almost every truck that is at 12.5" at rest stretches out when articulating and digging.

[punkuup5150]

all i can say is wow the last climb that freaking cool hahaha but yeah it looks wayyy long

[bige]

http://www.youtube.com/watch?v=m75tR8w85b4&feature=related
Same chassis but berg axles and shows more what the chassis does..
Pretty cool.....

[BL44ST]

i would like to try it or see it in person befor i could judge it. i think this is taking it to the next level. for as comping with is type of setup imo this doesnt really fit the standerds. maybe under a unlimited class :D 13.5 wb any tire and rim and any ideas you can think of. but has to have rims and tires "thumbsup" springs to jump rock to rock :mrgreen:

[IWantATurbo]

i want one!!!! can some one read that and tell me how much???

[JK1]

New info.
Found these pics:
http://rockcrawlers.files.wordpress.com/2009/07/sany0641.jpg
http://rockcrawlers.files.wordpress.com/2009/07/sany0640.jpg

Seems like there is some kind of cantilever system with extra shock. Interesting..

J

[eron]

I stumbled upon this japanese chassis in the net:
http://crawling-mania.com/jp/modules/pico/index.php?content_id=11
But is it comp legal?

Heres a video:
http://www.youtube.com/watch?v=FptHAKRLzs0

J


Any chassis ever made is 2.2 comp legal.

[nismotuningrocks]

Any chassis ever made is 2.2 comp legal.

That's a lie, links have everything to do with making a 4-link chassis legal, most chassis' don't come with links. The same thing with torsion, is every one made for 2.2, no... Saying every chassis is 2.2 legal is really ignorant.

[JeremyH]

Saying every chassis is 2.2 legal is really ignorant.
Bolt on, no. Can it be modified to work, yes.

[jason]

It's basically just a rip off of the Mantis Chassis but with really poor link geometry.

It is legal as long as you put a body on it. The suspension geometry looks horrible though. I would pass on it for sure.

But if you would have seen how those rigs worked on our typical courses you could tell that they are not very capable here. It is also easy to make something look good in a video when you use 10 hours of film to edit it down.

I actually put 2 full packs through one of these rigs at the worlds a few weeks ago. It is nothing like a mantis.

I ran several of the comp courses with one of these rigs and I was VERY impressed, driving it with a stick radio(which I cannot stand) i was able to spank one of the courses. Rig worked really well.

[Culetto]

I actually put 2 full packs through one of these rigs at the worlds a few weeks ago. It is nothing like a mantis.

I ran several of the comp courses with one of these rigs and I was VERY impressed, driving it with a stick radio(which I cannot stand) i was able to spank one of the courses. Rig worked really well.


So back to the question is it legal. Did the Japanese team compete with this chassis at Nationals?

[Krawler Hobbies]

Okay, the chassis looks really neat and innovative but after watching the videos and seeing this preform, how is thing legal? You can change the ride hight with the push of a button. Not sure how it actually does this but it seems to be foucsing on a really grey area in the rules. Was this rig ran at worlds?

-Jason

[msps003]

We don't want to leave it to you do decide when a chassis design is unique......


Solid/torsion mount rear with a 4 link sprung (or droop it doesn't matter) front. As far as crawling well...it looks inconsistent to me. It does look like it fits the Japanese style, obviously. But if you would have seen how those rigs worked on our typical courses you could tell that they are not very capable here. It is also easy to make something look good in a video when you use 10 hours of film to edit it down.

Put a body on that thing and then lets see how it does...

[Culetto]

http://www.youtube.com/watch?v=m75tR8w85b4&feature=related
Same chassis but berg axles and shows more what the chassis does..
Pretty cool.....

Put a body on that thing and then lets see how it does...


See above link with a c-10 body on it and bergs.

[jason]

So back to the question is it legal. Did the Japanese team compete with this chassis at Nationals?

Okay, the chassis looks really neat and innovative but after watching the videos and seeing this preform, how is thing legal? You can change the ride hight with the push of a button. Not sure how it actually does this but it seems to be foucsing on a really grey area in the rules. Was this rig ran at worlds?

-Jason

Yes they did run it. I am not sure why it would be illegal?

Show me a rule that makes it illegal, I don't know of one.

[Krawler Hobbies]

Hey, if you say its legal than its legal!

Do you have any idea on how this works? How they have it setup to change the GC on the fly?

-Jason

[Hurley0706]

Yes they did run it. I am not sure why it would be illegal?

Show me a rule that makes it illegal, I don't know of one.

The part in question was the "non-fixed?" shock mount. Depends on how you want to interpert it I guess.

[Hurley0706]

Hey, if you say its legal than its legal!

Do you have any idea on how this works? How they have it setup to change the GC on the fly?

-Jason

The link geometry allows the suspension to drive under itself it appears.

[Krawler Hobbies]

The link geometry allows the suspension to drive under itself it appears.

So nothing electrical goes on? Just lock the front and drive the rear under it to change the height? How would it stay like that once you start moving forward then?

-Jason

[jason]

So nothing electrical goes on? Just lock the front and drive the rear under it to change the height? How would it stay like that once you start moving forward then?

-Jason

Rear burn forward rear drives under, front drive forward it all stretches out.

[StIcK kInG]

Do you really think so? The back is mounted up like the mantis but other than that and a droop suspension i dont see it as being a rip off of the mantis. this thing has a shock within the chassis and the characteristics of this rig from watching a youtube video are IMO nothing like the mantis. this was some out of the box thinking for sure. I must say... i kinda like it. i liked the mantis as well. i was a fan of the super mantis that never went into production. I just think this thing is neat to watch run. It looks promising n would be fun to learn to drive:mrgreen:

It's basically just a rip off of the Mantis Chassis but with really poor link geometry.

It is legal as long as you put a body on it. The suspension geometry looks horrible though. I would pass on it for sure.

[Hurley0706]

this thing has a shock within the chassis

Where?

I still see the design as based off the mantis principal. Is there anything wrong with that? Depends who you talk to.

[StIcK kInG]

right here. am i seeing something wrong here? if so sorry. if not how did u miss it?

New info.
Found these pics:
http://rockcrawlers.files.wordpress.com/2009/07/sany0641.jpg
http://rockcrawlers.files.wordpress.com/2009/07/sany0640.jpg

Seems like there is some kind of cantilever system with extra shock. Interesting..

J

[Code454]

Where?

I still see the design as based off the mantis principal. Is there anything wrong with that? Depends who you talk to.


i agree with the people that say it is nothin like a mantis and heres the pics
http://rockcrawlers.files.wordpress....7/sany0641.jpg (http://rockcrawlers.files.wordpress.com/2009/07/sany0641.jpg)
http://rockcrawlers.files.wordpress....7/sany0640.jpg (http://rockcrawlers.files.wordpress.com/2009/07/sany0640.jpg)

[StIcK kInG]

no, nothing wrong with that at all harley. i like h3's design. i had one when they 1st hit the lhs's. just had it to play with. wasn't my comp rig. could have been though...

Where?

I still see the design as based off the mantis principal. Is there anything wrong with that? Depends who you talk to.

[mutant]

There appears to be two types of chassis on the crawling mania website, a 'cmb Jack' and a 'cmb sLug'

i think the 'cmb Jack' uses a servo winch to adjust the ride height, whereas the sLug uses differential front/rear wheel speed.

I too am sure i can see a central shock on the sLug.

$290 for chassis conversion.....

[genki]

I think some of the earlier shots a Mantis chassis was used and this is where the original idea evolved from.

There is nothing electronic about it. As Jason mentioned it is all to do with the centre shock set up. This allows the chassis to raise on stopping or slowing as well as lowering when on the power.

[Ripperfi]

There is nothing electronic about it. As Jason mentioned it is all to do with the centre shock set up. This allows the chassis to raise on stopping or slowing as well as lowering when on the power.

So its just that simple. Wow. I think too complex for my own good.