What is wrong with this downforce calculcation?
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I tried calculating the downforce of a spoiler I need for a robot. I used this formula.
F=12Acaρv2F=12Acaρv2
Where ρρ is air density, vv is the speed of my robot, caca is the lift coefficient and AA is the windage of the spoiler which I calculate by multiplying its width, length and angle of attack in radians.
A=wlsin(απ180)A=wlsin(απ180)
I used the following values for calculation.
w=0.07m,l=0.04m,α=45∘w=0.07m,l=0.04m,α=45°
ca=1ca=1, because I don't know a better approximation.
ρ=1.2041kgm3ρ=1.2041kgm3
v=3.5msv=3.5ms
And I got as result, that the downforce is around 0,0146 Newton which seems a lot too small. What is wrong with my calculation, or is it actually correct? (I need to compensate about 50N in small turns.)
hope that help you
F=12Acaρv2F=12Acaρv2
Where ρρ is air density, vv is the speed of my robot, caca is the lift coefficient and AA is the windage of the spoiler which I calculate by multiplying its width, length and angle of attack in radians.
A=wlsin(απ180)A=wlsin(απ180)
I used the following values for calculation.
w=0.07m,l=0.04m,α=45∘w=0.07m,l=0.04m,α=45°
ca=1ca=1, because I don't know a better approximation.
ρ=1.2041kgm3ρ=1.2041kgm3
v=3.5msv=3.5ms
And I got as result, that the downforce is around 0,0146 Newton which seems a lot too small. What is wrong with my calculation, or is it actually correct? (I need to compensate about 50N in small turns.)
hope that help you
Answered by
0
Hey mate ^_^
Nothing is wrong with down force calculation. See the force produced on the spoiler will be a result of a pressure difference.
A difference of pressure will create a force in a certain certain area of the material and the value is not too far from the true. It is probably pointless to use a spoiler with that size and velocity.
#Be Brainly❤️
Nothing is wrong with down force calculation. See the force produced on the spoiler will be a result of a pressure difference.
A difference of pressure will create a force in a certain certain area of the material and the value is not too far from the true. It is probably pointless to use a spoiler with that size and velocity.
#Be Brainly❤️
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