Replies to post #25689 on Cyclone Power Technologies, Inc. (fka CYPW)

[Tom Swift]

[Tom Swift]

Hi Buddy,

I'll try again, on my last effort the hyperlinks came out as trash so I deleted the post.

An important part of the tale was just how Cyclone came up with the figures of 250 and then 400 MPH for their LSR machine. The following can be found at:

http://www.steamautomobile.com/ForuM/read.php?1,20060,21173#msg-21173

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HLS April 08, 2013 08:50AM

Hi Guys,

I had a question asked,how fast will a car will go . There are the two main factors,the rolling resistance and the wind resistance. The rolling resistance is near constant torque which includes tires, gear etc. As the rpm increases, the hp demand also increases. The wind resistance is obvious as it is the pressure in pounds per square ft x the frontal area, times the wind resistance factor.

As an example if it takes 10 hp to go 50 mph, then x 2.6 = 26 hp to go 100 mph, then x 2.6 = 68 hp to go 150 mph. This is just to give an example of what it takes to go fast and why is it is important to do dyno testing. We know how fast we can go as we know our rolling and wind resistance numbers. We can easily go over the 200 mph mark and are looking at 250 mph. This will have to be done at different tracks. Bonneville is longer than Canaveral and will afford the fastest time, but 200 mph won't be to shabby at Canaveral. The testing is to set the cutoff at the right points for each run, as the longer the run the shorter the cuttoff can be. It is necessary to use the smallest water rate for the most hp.

Harry
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Jim Crank April 8, 2013 02:59PM

Harry,

ABSOLUTELY NOT!!!!

Wind resistance horsepower goes up as a cube of the speed. Wind resistance force is a function of the square of the sped.

Jim
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steamerandy April 09, 2013 02:08AM

On that subject I would just defer to the Wiki

Force to over come aerodynamic drag

Fd = 1/2 p v2 Cd A

Power, Pd, is force, Fd, time velocity, v.
Fd force times distance divided by time
distance divided by time is velocity.
velocity is speed

Pd = Fd v = 1/2 p v3 Cd A

1/2 p Cd A . p air density is nearly constant, Cd is a constant drag coefficient. And assuming A area is constant. Of course some cars do have active aerodynamics.
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To top it all off, you can do the calculations online with just a few input numbers: https://www.rbracing-rsr.com/aerohpcalc.html

None of this is esoteric or exotic, we're talking basic engineering. If the Cyclone Chief Technology Officer is making public statements and holding press conferences without doing 5 minutes research, what does it say about the fundamental product design?