Currently am I racing with 1:8 scale nitro R/C cars (3,5cc engine, 2,5kg, zero technology) which have a separate mounted body.
This body is just a piece of polycarbonate that resembles a real racing car, like the pug 908 for instance.
Altrough the rear of the body features a spoiler at around 50 degrees angle of attack.
I know this creates some downforce and a huge amount of drag. see below
Now the regulations say:
that is to a maximum overhang of 153mm behind the rear wheel centerline that is free to modify.Everything behind the rear wheel centerline is free
I was thinking to cut out the big inefficient spoiler and to replace it with a more efficient wing (double or multi-element) and mounted directly on the car. (thus when you remove the body, the rear wing remains attached to the car.
I have TurboCAD on my MAC at home, but to start making a rear wing... which profiles are mostly used?
the regulations say:
max width 267mm
max chord 77mm
min angle of attack: 35 degr.
max angle of attack: 45 degr.
max overhang from rear wheel centerline: 135mm
max height (measured from the ground): 170mm
and thats it, they say nothing about max elements, endplate size etc.
remember that these car's go around 110km/h... so I guess aerodynamics can play a role.
For a single element wing, which profile should i use to start with?
multi-element, which profiles? (let's keep it to a 3 element, mainplane + 2 flaps.)