Quote:
Originally Posted by aardvarcus
Julian,
I don't know how much surface pressure or lift/downforce data if any Phil collected when he took his T100 to the Darko wind tunnel for testing in 2014 and 2017. But I doubt he dismisses all measurement data seeing as how he spends time and money on money on wind tunnel testing.
I know from experience all measurements require a grain of salt, and there are things i have seen in print i remain doubtful of based on my past experiences. Thus it doesnt suprise me that the two of you are lending varying levels of credence to different sources based on your past experiences. Thus you dont agree.
I don't actually know either of you, but realize my motivations in this conversation are selfish, in that i enjoy seeing both of your content, and I personally wouldnt want either of you to not post. Both of you have far more experience than I do.
I personally feel that if we were all sitting in a living room and not on the semi anonymous internet removed from broader context we would get along better.
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There were $144,000 worth of Honeywell strain gauge load cells and air bearings under Spirit at DARKO. At an equivalent 135-mph, Spirit generated 30-pounds downforce on the front and 22-pounds lift at the rear,for a vehicle with a static loading of 4,220-pounds.With 50/50 weight distribution,that's 1,055-pounds per wheel.At 135-mph Spirit weighed 4,228-pounds.I must presume that this would be defined as 'zero-lift,' for all intents and purposes.
The shape was pre-tested in 1935.I never saw any justification attempting to reproduce the pressure profile testing.What I'd done consumed 23-months worth of savings as it was.