• Feb 9, 2009
Click above to watch video after the jump

Earlier this month, we told you how the motorsports gurus over at Reynard are preparing to market a bike-engined trackday special called the Inverter. The tube-frame racer promises lightweight thrills and face-contorting lateral Gs to take on the Radicals and Caterhams world.

Reynard has now released an official video teaser that gives us the backstory on the car's development, including an interesting interview with Dr. Adrian Reynard himself. Check out the gallery below after you watch the HD video after the jump.


[Source: Reynard]
http://www.reynardracingcars.com/videos.html


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    • 1 Second Ago
  • 10 Comments
      • 5 Years Ago
      logic is flawed, simple if the down force equals the weight it does not mean theres no force on tires, it means there's double the force on the tires that's the point of down force. example 1000lb car traveling at 100mph generates 1000lb of down force so if you were able to weight the car traveling at that speed it would read 2000lb. so in theory you could drive it upside down
        • 5 Years Ago
        edit i missed you last part, that would work
        • 5 Years Ago
        No flaw in my logic as I can see.

        If DF (tired of typing) equals the weight, then the tire see double the vert force if the car is right side up. But if the car is upside down, then the tires see no vert force. Gravity always works down, but aero DF work towards the bottom of the car. With the car right side up, they aide each other, with the car upside down, they oppose each other.

        Now if the car was driving in a loop (think Matchbox track), then there are other forces in play, but let's not get in to that.
      • 5 Years Ago
      The song is :

      Boards of Canada - Geodaddi
      http://www.youtube.com/watch?v=UVl3Fb9GKdg
      • 5 Years Ago
      The way i've heard the "up-side down" driving explained is that at 100 mph the down force created is roughly 3x the weight of the car. In fact, that is explained in the original post and the press release from Reynard.

      Im sure it could be done with the right conditions, it's finding a suicidal driver thats the hard part.
      • 5 Years Ago
      Does this have a SCCA, NASA, or FIA class it's supposed to run in?
      • 5 Years Ago
      When we wind tunnel tested the 50% scale model of this car we achieved nearly three times the car's weight in additional downforce at 130mph, so tractive force is not a problem at high speed...
      for example, the car's weight = 400kg,driver weight = 75kg, downforce @ 130mph = 1250kg, then the effective loading on the tyres if inverted on the ceiling at 130mph = 1250 - 475 = 775kg which would be in the vertically upwards direction pushing the car to the ceiling.
      Its clear then that we do not even need to be travelling at 130mph to gain enough downforce to support the cars weight plus traction requirements.
      regarding drag, we have a very narrow car, only 1.5m wide, and we have tried to minimise the cross sectional area at all places along the length of the car. By doing this we have high downforce with low drag, resulting in extremely high aero efficiency (called L/D ratio). this allows us to use a smaller & lower power engine (and hence lighter & more efficient) whilst reaching the required top speed.
      acrobatic planes use various techniques to allow an IC engine to run inverted for short periods and we plan to learn from these solutions.
      hope this helps
      Andre
      technical director
      reynard racing cars
      • 5 Years Ago
      ahhh, i see totally forgot about gravity haha. your right it would have to equal more than the weight of the car. I wonder how much?