What is the DRAG COEFFICIENT at 280?



It is a CHADFO SPEEDO and if you read it carefully, you will see that I have the fastest box on the boards!

 

The stock speedometer faceplate displays speed in 20 mph increments. That means that you have to do a lot of extrapolation and interpetation in your mind. With 10 mph increments, you know how fast you are going without any brain power being wasted.
I also enjoy having a mark at 55mph for instant data recognition at a glance.
I would have spelled out the words FULL and EMPTY, but I did not think of that in time to have it done.
Thanks CHADFO

 

Isn't the drag coefficient the same at all speeds?

Now the total amount of drag ... that's a different story!

I wonder if the xB could reach 280 in freefall?

 

 

I have no idea what this thread is about.

 

uhh same here...

 

wtf?

 

my head hurts

 

Free post!

 

Well, what you really want is the drag area.

Cd x A = drag area

Cd = coefficient of drag

A = frontal surface area

My informal metric, # of bugs on front / hours of night driving, indicates the xB has a lot of front surface area, so even if the drag coefficient was low, overall drag would still be quite high. I'm wondering if the xB even has a speed limiter or if it just naturallt tops out before 120 as overall drag matches HP.

 

many vehicles will top out due to drag unless they are very over-powered. for an example, to increase speed in an airplane by 50% the power must be increased 100% and so on. a 100% increase in speed would require a 400% increase in power. now you got the weight thing to worry about. the box is only slightly different than an airplane. no wings; no propeller; a little less aerodynamic; bigger (and more) wheels...well, you can see that they are almost identical with minor differences!!?