downforce

[Jake48]

I'm in the process of building my own shock package for a first gen FM, I have all the numbers the shock guru needs except maximum downforce on the front and rear wings. Does anyone have these numbers or know where I could find them or who would.

Thanks
Jay Jacobellis
303.683.0333

[David Ferguson]

You don't say what vehicle speed (actually air speed), but at 100 mph, I would expect a total of 500 - 800 lbs (distribution should be equal to the weight distribution).

[Jake48]

You don't say what vehicle speed (actually air speed), but at 100 mph, I would expect a total of 500 - 800 lbs (distribution should be equal to the weight distribution).

David
Thanks for the reply, I would assume max speed would be 125mph, you state 500- 800 does that mean 500 on the front wing and 800 on the rear I'm not an engineer so please excuse my ignorance
Jay

[Fred Michael]

I would assume 500-800lbs of total downforce. How it's distributed depends on where the center of pressure is on the car and that is affected by wing angles, rake, ride height, etc

[Chris Livengood]

If you really want to know measure the downforce with your data. 500 sounds closer than 800 for a 1st gen FM.

[David Ferguson]

I meant a total of 500 to 800 lbs. If the weight distribution was 40% front / 60% rear, then that would be 200 to 320 lbs on the front (100 to 160 for each corner), and 300 to 480 on the rear (so 150 to 240 each corner).

[jtaphorn]

I found the downforce telemetry on this video of a F1000 at HighPlains very enlightening. I kept pausing at various speeds to plot the curve.

https://www.youtube.com/watch?v=Trcu4Nf7uG0

[E1pix]

Jay Jacobellis

Very nice to see a fellow Colorado Karter here.

[J Leonard]

I would think the diffuser on that Pheonix would contribute a lot. Just guessing but possibly in the 400 lb. range at speed.

[Jake48]

who is E1 pics
Great video down the back straight I seen numbers approaching 1000lbs

[E1pix]

It’s me, that’s who!

Great catching up, Happy FM!

[Terrenzio]

Might be able to glean something from this:

https://www.sciencedirect.com/scienc...95717705004590

[Jake48]

That's a mouthful, but an interesting read
Thanks