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Re: Tideace 2022 New Enduro Mold FS838 Being Production
There seem to be two different designs. Pics 2 - 4 show a link between chain stay and rear axle, the 3D renders and the one from Linkage X3 see the rear wheel directly attached to the chain stay. Pretty sure the latter is the correct version, since that's the same as the Range and the other one gives horrible results in the X3 analysis. So I used the screenshot from Linkage X3 to look at the leverage ratio. Not quite as progressive as one might want, definitely not coil shock compatible since it's completely flat towards the end. Leaves room to hope that this screenshot is not the final design. February 17, 2022, 01:09:10 AM |
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Re: Tideace 2022 New Enduro Mold FS838 Being Production
One thing I noticed in the renders is that there seems to be an extra piece between the reverser link and the shock, a shock extension from what I can tell. It’s highlighted blue-green in the 3D renders. Maybe that alters the kinematics somewhat? Was it included in the Linkage X3 calculations? You're right, it's a common shock yoke. The eye to eye without this part would be about 260mm, the yoke reduces that to 205mm. It has no effect on the kinematics though since there is no additional link (which wouldn't work anyway, it would just collapse in on itself). The one effect it has is that there is no movement in the rear shock eye, meaning that the rotation is done by the bearing in the yoke instead of the bushing of the shock. So with the trunnion design, both ends run on bearings. February 21, 2022, 02:50:11 AM |
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Re: Tideace 2022 New Enduro Mold FS838 Being Production
This is kinda odd, since norco specifically states that new range is something like coil shock specific. Had Haideli screwed up kinematics? Well, if the screenshot named "test.jpg" is based on the final design, then yes. But as I said, I'm hoping that it isn't. The leverage ratio could be easily made more progressive simply by moving the shock yoke mount. Right now, the progression from SAG to full travel is at 6,5%. Changing the position of the shock yoke mount by just 10mm would make it 24%. The Norco Range has about 22%. February 21, 2022, 05:18:16 AM |
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Re: FM1001 / FM1156 - 135mm frame
Kinematic analysis and "corrections" to the geometry chart. Not sure if you can trust this one... He seems to use the diagram from the geo chart, which would be very unreliable. I used the vector graphic sent to me from carbonda and got very different results, especially concerning anti squat and head angle. Here's a screenshot. I put in a 30t chain ring as well and the same Center of Gravity at 650 above the BB, since that affects the anti squat greatly. November 09, 2022, 01:31:29 AM |
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Re: Carbonda FM 1003 / Flybike FM 1266 180mm "Super Enduro"
I see that Sherpa appear to be selling this frame as the Olympus and some build options use a coil shock. Looking at the linkage plots in the first post I would have thought that this frame wouldn't suit a coil shock as the leverage ratio drops pretty linearly throughout the travel, wouldn't a frame designed for a coil shock have a progressively increasing leverage ratio throughout the travel? Not at all. You can find plenty of heavy hitting frames with pretty linear leverage drops fit for running coils, including VPPs like the Santa Cruz V10/Nomad or horst links the Specialized Demo/Enduro. And then you have frames with decreasing progressivity like the YT Capra or the Canyon Sender, perfectly fine running coils as well. Increasing progressivity will mean diving through the mid travel and lower dynamic ride height, so definitely not only beneficial. But as ever, it all depends on your personal preference and riding style. Numbers will only take you so far 
November 27, 2022, 05:52:31 AM |
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