Please don't call me "son", I don't appreciate the condescending nature, only my
father can get away with that.. Now my question is about down force, not autoXing
seat time. I said 100lbs at 40mph (not 40lbs). The "Wild Ass" part of my
calculation doesn't take spring rates and moments (from the axle?). I can sorta
see where a rotational moment could change the #'s (a little), but I don't see
where spring rates would some into it (force has got to be equal on both sides of
the spring). It's a calculation of wind speed, air density and tail gate angle.
The result is force in the downward direction on the tail gate hinges, there's
also obviously force in the reward direction too, but I didn't mention it.
I got the tail gate fabbed up now. I used some turn buckle things sorta like
TonyC mentioned. There is eye bolts on each end of the turnbuckle. One end is
bolted to the gate latching points of the bed (and spaced out a little) and the
other is bolted where the rope ties to the gate. The ones I used might be a
little big for the application. I can get an angle of about 60 to 0deg (0 is gate
completely open). I could get a steeper angle if I used a smaller turnbuckle.
I'll post up pictures when I get around to it.
Jay W
Hemipower@aol.com wrote:
> In a message dated 3/8/02 5:19:02 PM Eastern Standard Time,
> jason.p.woodruff@boeing.com writes:
>
> > Why is "Research and seat time" the only answer you ever get from an autoXer
> > when you say you want to go faster?
> >
>
> Well, son, experience is the first thing that comes to mind at the
> moment. I would say that "the" first thing you'll ever hear a driver from
> *any* racing discipline is, "get more seat time". It just seems to make
> sense that more practice of anything will allow you to perform anything
> much more efficiently.
> For Example, what do you personally do well?
> If someone came to you and said that they tried to do
> whatever it is that you do well, but for some reason
> didn't do it as well as you. What is the first thing
> *you* would say?
>
> BTW
> As far as your SWA approximation, did you by any
> chance take in account spring rates, moment and deflection?
>
> What formula did you use to come up with the 40lbs of
> downward force with your tailgate at X angle?
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