RCCrawler Forums

EeePee · 12-29-2005, 01:44 PM

My TXT got a slight make over.

After many beers, I had this idea. And surprisingly, it came together. There is no up and down travel, just articulation.

When I get the rest of it together, I'll report back on how the thing works, if it works at all. I've only seen one truck use forced articulation before, and that was a Trials Truck on a German website.

EeePee · 12-29-2005, 01:45 PM

Mandatory...

TwistedCreations · 12-29-2005, 02:01 PM

wow, your a little late on thinking that one up

been done before, just in a different manner

EeePee · 12-29-2005, 02:02 PM

But how did it work?

grover · 12-29-2005, 02:04 PM

Nice! It is alot of fun trying crazy stuff like this but you never really know until it hits the rocks. looking forward to the results.

grover-

TwistedCreations · 12-29-2005, 02:04 PM

only your left side has up and down travel?? the right side stays set??

grover · 12-29-2005, 02:12 PM

Quote:

Originally Posted by TwistedCreations

only your left side has up and down travel?? the right side stays set??

The side "with out cants" tire will move up and down as it articulates, just not as much as the other side.

Cubman · 12-29-2005, 02:22 PM

I wonder if it would help or hurt performance with Canti's on the other side? Also, you should sleeve that rod going from front to back with an arrow, looks like it's bending a little

EeePee · 12-29-2005, 02:39 PM

Here's a video of it.

http://www.rcpics.net/img/70827

jeepster · 12-29-2005, 03:09 PM

Great job thinking outside the box ...however I don’t think the forced articulation is going to be a good thing. The front and rear need to flex independent of each other

Frakk · 12-29-2005, 03:09 PM

thats great. it eliminates torque roll as well.

badger · 12-29-2005, 03:23 PM

Quote:

Originally Posted by jeepster

Great job thinking outside the box ...however I don’t think the forced articulation is going to be a good thing. The front and rear need to flex independent of each other

I agree. Cool idea, just don't think it will work that great on rocks.

grover · 12-29-2005, 03:36 PM

Quote:

Originally Posted by jeepster

Great job thinking outside the box ...however I don’t think the forced articulation is going to be a good thing. The front and rear need to flex independent of each other

Some of the best performing chassis utilize a bit of forced articulation (the stick for example). My tlt has no suspension on the back at all and this forces the front shocks to act in a manner that transfers force from one corner to the oposite corner on the oposite axle, thus aiding in traction whenever these are the tires in need of traction(often!).

EeePee · 12-29-2005, 03:39 PM

It'll be interesting. The idea is to force weight on the tires. But at the same time I forsee it crawling on 3 tires often. I guess torque roll is eliminated, the chassis doesn't move at all.

It's pretty cool, it's at a 13 inch wheelbase in those pictures. 12.5 wide.

And yeah, that long 4/40 all thread sucks.

Gimbal · 12-29-2005, 04:02 PM

The Aussie russell inspired me to do mine from this post.

Here is how mine turned out
Click
It has a cable from front to rear on each side. Works ok :?

JohnRobHolmes · 12-29-2005, 04:17 PM

it would be pretty easy to dampen that. Attach a shock to the frame and the linkage and your done.

AdamF · 12-29-2005, 04:31 PM

Bring it down to cincy unda 'da bridge on Saturday and see how it really works!

monsterjeepn · 12-29-2005, 06:50 PM

Quote:

Originally Posted by Cubman

I wonder if it would help or hurt performance with Canti's on the other side?

yes it would help a lot... see the way he has it set up now, it will only shift the weight to one side... but this setup is REALLY good when u put the forced articulation on both sides, it keeps even pressure on all tires

... it doesnt seem like it would work all that well because u need the axles to flex independently, but it does... it's awesome... ive been experimenting with it for a long time with my legos before i go full on in an RC...

microgoat · 12-29-2005, 07:33 PM

The British Motor Co. used a similar setup back in the sixties using hydraulics to link the front & rear wheel on each side of the car, they called it Hydrolastic suspension. I'm not sure what the purpose was on a passenger car (smoothing out the ride, maybe? can't see how that would work), and they dropped it after a few years.

Hydraulic linking would be kinda cool on a crawler, though, even though the whole forced articulation argument has been beaten to death.

How many beers did it take to come up with that?

We should have a half-azzed idea cook-off at the GTG in April.

jason · 12-29-2005, 07:41 PM

I like it, and look foward to seeing how it does.

12-29-2005, 01:44 PM	#1
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	No shocks or springs, forced articulation shafty My TXT got a slight make over. After many beers, I had this idea. And surprisingly, it came together. There is no up and down travel, just articulation. When I get the rest of it together, I'll report back on how the thing works, if it works at all. I've only seen one truck use forced articulation before, and that was a Trials Truck on a German website. Attached Images

12-29-2005, 01:45 PM	#2
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	Mandatory... Attached Images

12-29-2005, 02:01 PM	#3
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	wow, your a little late on thinking that one up been done before, just in a different manner Last edited by TwistedCreations; 12-29-2005 at 02:03 PM.

12-29-2005, 02:04 PM	#6
TwistedCreations Colt Python/SR9c Join Date: Feb 2004 Location: out in the shop, reloading ammo! Posts: 8,626	only your left side has up and down travel?? the right side stays set?? Last edited by TwistedCreations; 12-29-2005 at 02:07 PM.

12-29-2005, 02:02 PM	#4
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	But how did it work?

12-29-2005, 02:04 PM	#5
grover Rock Crawler Join Date: Jan 2005 Location: Tumwater Posts: 910	Nice! It is alot of fun trying crazy stuff like this but you never really know until it hits the rocks. looking forward to the results. grover-

12-29-2005, 02:22 PM	#8
Cubman Rock Crawler Join Date: Nov 2005 Location: Oak Ridge Posts: 590	I wonder if it would help or hurt performance with Canti's on the other side? Also, you should sleeve that rod going from front to back with an arrow, looks like it's bending a little

12-29-2005, 02:39 PM	#9
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	Here's a video of it. http://www.rcpics.net/img/70827

12-29-2005, 03:09 PM	#10
jeepster Rock Stacker Join Date: May 2004 Location: Idaho Posts: 81	Great job thinking outside the box ...however I don’t think the forced articulation is going to be a good thing. The front and rear need to flex independent of each other

12-29-2005, 03:09 PM	#11
Frakk Pebble Pounder Join Date: Sep 2005 Location: Canada Posts: 171	thats great. it eliminates torque roll as well.

12-29-2005, 03:39 PM	#14
EeePee MODERATOR™ Join Date: Jul 2004 Location: Ohio Posts: 18,928	It'll be interesting. The idea is to force weight on the tires. But at the same time I forsee it crawling on 3 tires often. I guess torque roll is eliminated, the chassis doesn't move at all. It's pretty cool, it's at a 13 inch wheelbase in those pictures. 12.5 wide. And yeah, that long 4/40 all thread sucks.

12-29-2005, 04:02 PM	#15
Gimbal Rock Crawler Join Date: Mar 2004 Location: Where it's wet Posts: 833	The Aussie russell inspired me to do mine from this post. Here is how mine turned out Click It has a cable from front to rear on each side. Works ok :?

12-29-2005, 04:17 PM	#16
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	it would be pretty easy to dampen that. Attach a shock to the frame and the linkage and your done.

12-29-2005, 04:31 PM	#17
AdamF RCC Addict Join Date: Apr 2004 Location: Cincinnati Ohio Posts: 1,673	Bring it down to cincy unda 'da bridge on Saturday and see how it really works!

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12-29-2005, 07:33 PM	#19
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	The British Motor Co. used a similar setup back in the sixties using hydraulics to link the front & rear wheel on each side of the car, they called it Hydrolastic suspension. I'm not sure what the purpose was on a passenger car (smoothing out the ride, maybe? can't see how that would work), and they dropped it after a few years. Hydraulic linking would be kinda cool on a crawler, though, even though the whole forced articulation argument has been beaten to death. How many beers did it take to come up with that? We should have a half-azzed idea cook-off at the GTG in April.

12-29-2005, 07:41 PM	#20
jason R.I.P. Chip Join Date: Jan 2004 Location: The Crawler State Posts: 13,938	I like it, and look foward to seeing how it does.

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