TA torque reaction-not!

[yoshi]

Originally Posted by Bugpac

then why dont trailing arms do it? shit why doesnt every rail do that if thats the case?

Trailing arms do it as well. Punching the gas lifts the back end of the vehicle, watch the video below and you can see what i'm talking about..

http://www.youtube.com/watch?v=_oU3g...ke-rail-2.html

[Bugpac]

I was just looking at some trophy truck videos, and going by fabbers analogy they should stand up in the rear as well, Sure looks like they squat to me...

[weasel]

Originally Posted by masterfabr

FOrward mount point is higher than the rear hub centerline. Under acceleration you are leveraging the rear up as the wheel tries to "drive" under the front mount point.GOt to go now.Post your objections!

Thats exactly correct, was reading about that just last nite.
Not as much squat too,,,

[masterfabr]

Originally Posted by Bugpac

then why dont trailing arms do it? shit why doesnt every rail do that if thats the case?

Sure do.The point I'm making tho is that just because the rear end lifts it's not from torque REACTION when talking about ta's or 3 or 5 links. THe upwards motion from them is not transferring any front end weight to the rear through a torque reaction at the front mount. A standard non independent rear end will transfer torque through the axle tubes and create a torque reaction that will lift and transfer front end weight to the cars rear tires aiding in traction. Pull up some video of anNHRA Pro Stocker. Watch the launch very closely and notice how the car squats but the distance from the top of the rear wheel to the fenderwheel INCREASES at the same time.Now THAT"S weight transfer from torque reaction and some VERY firmly planted skins.

[yoshi]

Originally Posted by Bugpac

I was just looking at some trophy truck videos, and going by fabbers analogy they should stand up in the rear as well, Sure looks like they squat to me...

Trophy trucks are different, the links pivot on the rear axle, trailing arms are solid, like the swingarm on a motorcycle, you have a solid link running to the wheel, the wheel spins forward which makes the trailing arm want to flip over backward, but since it's attached to the chassis, it lifts the chassis at the connection point. Trophy trucks are different, they don't have solid links......

[masterfabr]

Originally Posted by yoshi

Trophy trucks are different, the links pivot on the rear axle, trailing arms are solid, like the swingarm on a motorcycle, you have a solid link running to the wheel, the wheel spins forward which makes the trailing arm want to flip over backward, but since it's attached to the chassis, it lifts the chassis at the connection point. Trophy trucks are different, they don't have solid links......

That's not how it works,yoshi.

[arrowhead]

The TT's I've seen at the Super Sandshow had a fixed bar off the rear axle that went forward to about the bell housing...extremely long and the shocks sat in a pocket at 55/45

[bdkw1]

Originally Posted by yoshi

Trailing arms do it as well. Punching the gas lifts the back end of the vehicle, watch the video below and you can see what i'm talking about..

Way to mix apples and oranges.

Motor cycles have torque reaction from the chain not being in the same plane as the swing arm and not having the same pivot point. Which is the problem with the Tomcar rear suspension, which is why I brought it up earlier. Look at the Boysen version of the even old AMP link, it has an idler gear above the swing arm pivot the raise the chain so that it is running in the same plane as the swing arm. End of torque reaction. These were big for ATC's when the 250R came out. The only bikes to really have this set-up from the factory were ATK's. The New BMW 450 motocross bike has the swing arm pivot at the same point as the counter shaft to eliminate torque reaction. Mert Lawills street trackers use a 4 link type of set-up to get around it and also for constant tension on the belt drive.

[K-fab]

Originally Posted by yoshi

Trophy trucks are different, the links pivot on the rear axle, trailing arms are solid, like the swingarm on a motorcycle, you have a solid link running to the wheel, the wheel spins forward which makes the trailing arm want to flip over backward, but since it's attached to the chassis, it lifts the chassis at the connection point. Trophy trucks are different, they don't have solid links......

TT's run a four link setup. Two drag links that run from up near the cab back to the bottom of the rear axle. Then there are two links that go from the center of the top of the pumpkin back up front, near the same area as where the lower/outer arms attach. This lets the system articulate massive amounts.

The links are all solid. There's not a single air, water or fluid link in there anywhere...

Trailing arms don't have torque issues - the transmission and frame are what absorb the torque - the arms are isolated from the drive system via bearings.

[masterfabr]

BINGO! Yoshi,are you listening?