Looks like neutral to me?
Pretty sure second is negative
What is your testing methodology? I wanna try doing practical tests on the weekend
The downhill setup we were doing 45+ with 30mph hairpins today.
The e-baord setup has the uphill record at Maryhill. 40 seconds quicker than the pro standup downhill record.
Ill say it again. It is not rake. It is a mechanical return to center. Pulling force on the radius rods create a mechanical return to center.
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Did you do runs with and without the offsets? I thought most SRB builds level out without bushings already
Iām really torn because you are absolutely the subject expert on this, but the kinetics of the CAD testing says itās rake and I have no idea what Iām missing 
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Rake is def one of the things going on.
The rotation thing is not rake, that is a different mechanism.
Iām going to have to look into it more, good thing I have a set to play with!
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@CHAINMAILLEKID i will send you a set to bolt up to play with when we get back from running Mary Hill.
You will find the hanger moves on a roll pitch yaw axis.
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Does the axle actually pitch as the baseplate rolls and axle yaws? My CAD is telling me it stays in the same angle relative to a ground plane, but the pitch absolutely accounts for an RTC characteristic if it yaws top side in
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It does. If it didnot the setup would bind. Think about what would happen if you installed the radius rods to the hanger center and tried to turn. Instant bind. The hanger rolls as you sweep a turn.
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These trucks might actually be magic. Or close enough
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Science is magic until its understood 
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Gone in a puff of smoke?
bidding starts at 0
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As the baseplate rolls, one join goes up and the other goes down, which means one link pulls and the other pushes, the only way for the axle to have a push and pull is for the axle to twist along the axis (def not happening) or for the axle to yaw, but if the axle pitches then both links would either be pushing or pulling
Also why it doesnāt matter if the links attach to the top or bottom of the axle as long as they are the same left to right, if the axle was pitching then swapping where the links anchor would flip the direction the axle yaws
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This is exactly what I was thinking so the whole pulling thing doesnāt make sense to me apart from adding to frictionā¦
While we are at it, I argue TKP is just RKP with hella rake, and channel trucks are just TKP with well defined axis of rotation and less resistance
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Iāve suspected the axle does change pitch for a while.
And I did try and look at it in my video a while back.
@ 14:00
I wasnāt really set up well to really check, and only ended up with a vague indication that its probably doing that.
But yeah, would like to look into it further.
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Thereās another difference, and its important.
RKPs cantilever the weight out, with the axle extending out beyond the bushings.
That means thereās way more load being taken up by the bushings.
Where TKPs, you can have the weight basically directly over the pivot cup if you want, and so the bushings donāt need to support rider weight nearly as much.
How much weight is supported by the pivot cup or bushing seat doesnāt change geometry really, but it does have a big effect on ride characteristics and bushing response.
The other big one is the bushing interference angle. RKPs pivot at 90 degrees to the kingpin, so the pivot axis is entirely out of phase with the kingpin.
And TKPs kingpin and pivot axis are more in phase, so thereās less interference. That changes how much the bushing is engaged for each degree of lean. RKPs are able to tap into more rebound energy, because the bushings have more influence moving the hanger, and lose less energy to friction.
Youāre missing a lot I think if you simplify different truck styles to how much rake they have.
But it is useful to describe trucks with a lot of rake as saying they āTurn like TKPsā.
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My point is even though the bushing interaction might be different, the kinetics of a high rake RKP and TKP is the same, and I think itās the same situation with the 3 linkā¦Iām sure the bushing geometry makes a big difference in the feel but kinetically itās no different than RKP
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100% is happening.
Look at it from a zero rod angle perspective parellel to deck. When tilt is induced one rod pitches up from parallel and one down. Both getting shorter from the hanger pivot center. The hanger has to adjust by rolling to accommodate as the rods move away from the hanger pivot center. The relationship between the radius rods and hanger run on the same plane , both at zero and also at 48deg.
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Both of your pictures show negative rake. You have moved the wheel axle behind the pivot axle, closer to the deck.
Compare your pics to negative rake RKP. Itās the same (axle shifted from axis of pivot toward the deck)
The offset axles create rake, and āmechanical return to centerā is an inherent property of negative rake.
Negative rake creates a situation where the most stable position for the truck is when the truck is neutral.
3-links with negative rake and split angle rake as others have mentioned is an exciting new parameter to be able to dial in. It could be great for racing. Interested to see how it goes.
But, IMO, the axle offset and RTC is just negative rake.