you dont need a data acq or any money,
all you need is change in speed over time, coasting
look at your speedo entry and exit then get the time to
cover the distance from glen, and go to Mayf's site,
instant accurate CD, all for the nominal cost of entry fee
I believe that glen even had entry and exit speeds for the last mile
in Oct???
Joe :)
Skip Higginbotham wrote:
>OK so how do you do it without data acquisition equipment at Bonneville?
>Everybody can't afford it. Delta V is velocity and Delta T is what....time?
>Surely not Temperature.....Then what? It doesn't seem to be intuitively
>obvious....at least to me.
>
>Maybe hold the speed constant (as constant as possible) through mile 4 and
>then coast through mile 5 and get the exit speed????? What is the formula?
>Anybody know?
>Skip
>
>
>
>At 06:52 AM 1/26/03 -0500, Dave Dahlgren wrote:
>
>>wheel speed and time.. less than 1/4 mile. anyone with minimal data acq should
>>be able to get this info. end of run cut engine and clutch car of put it in
>>neutral and coast. delta V and delta T and you are there. the ultimate wind
>>tunnel complete with 'rolling road' with a full scale model and nothing
>>simulated.
>>So what is it going to take to get you into some data acq John?
>>Turk can do it with his if we can ever get a full pass in...
>>Dave
>>
>>John Beckett wrote:
>>
>>>OK here is another idea for testing your vehicle aerodynamics. What about a
>>>coast down test? I know little about this so my questions for you aero guys
>>>are:
>>>
>>>What useful data can be obtained from this type of testing?
>>>
>>>What type of equipment would be needed to make it work properly?
>>>
>>>How much of a distance is needed and what sort of speed is required to get
>>>worthwhile data?
>>>
>>>John
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/// what is needed. It isn't that difficult, folks.
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