Chris,
We ran the body at different yaw angles (slip angles) and different angles of attack (attitudes). We also tested quite a bit to verify simulation results and ensure we had achieved the best balance. You'll really notice the extra stability in the fast corners. Have you tried running the front spoiler? That also helps with reducing the amount of air that packs up under the hood. With your rocketry background I'm sure you would appreciate some of the other things that we learned in CFD and testing. I'd be happy to discuss this further with you in confidence. We don't want to give away all of our secrets.
Also don't want to upset the RC Tech gods with material that could be construed as advertising (our stuff was just designed to work better without cutting it into swiss cheese and we're a bit proud of that).
All the best,
Harold, Method RC
Originally Posted by
ChrisAttebery
Thanks Harold. I rubbed the squeaky clean look off of it last weekend.
I opened up the fender vents yesterday. I used a 5/32" straight fluted drill bit to drill a hole at each end and then connected the holes together with an Xacto knife. It isn't perfect, but it should be functional. I figure that it removes 3 square inches of material from the body.
I know you used CFD to design the body. Did you try running it at different angles of attack? I don't see forward drag as being as much of a problem as parachuting where the truck launches with a nose high attitude. Combine that with the fact that most 2wd SCT have a 60/40 weight distribution and you can how the air getting under the front of the body can flip the trucks over.
Coming from my high power rocketry background I'd like to see a body with a longer bed and more vents in the hood. That should move the center of pressure back closer to the CG.
Chris