Author Topic: NACA 66 Special A/BGS  (Read 365238 times)

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Offline SPARKY

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Re: NACA 66 Special A/BGS
« Reply #870 on: September 30, 2013, 12:55:37 PM »
Congrats guys looks like some pretty happy air back there  :-)  Does Eric think the rear wheel fairings  or the main body is causing the chute to fly to the inside of the turn?
« Last Edit: September 30, 2013, 01:03:17 PM by SPARKY »
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Offline Glen

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Re: NACA 66 Special A/BGS
« Reply #871 on: September 30, 2013, 12:57:33 PM »
Good data, those QC's are noisy. the chute looked great, also looked like good straight runs, love it, just think how much fun the salt will bring. :cheers:
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Offline bbarn

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Re: Re: Re: NACA 66 Special A/BGS
« Reply #872 on: September 30, 2013, 01:04:20 PM »
Congrats guys looks like some pretty happy air back there  :-)

sure does! That exhaust is nowhere near the velocity it will be on a high speed pass, we made no boost at all. The black smoke was due to a 140 degree peak block temp and 36 degree inlet air.If you look closely, those exhaust plumes are clearly re-attatching at the tip of the stinger.

Granted we had no flap applied, so this was a clean aerodynamic profile. It is interesting to view though, it looks like the exhaust gasses are forming a 12" cylinder that follows the car very consistently and without much turbulence.
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Offline bbarn

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Re:
« Reply #873 on: September 30, 2013, 01:06:08 PM »
The chutes were blown to the right of the car's path by a fairly stiff breeze. If we had slowed just a bit more and the chute deflated before the turn we wouldn't have picked the taxi light off.
I almost never wake up cranky, I usually just let her sleep in.

Offline Jon

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Re: NACA 66 Special A/BGS
« Reply #874 on: September 30, 2013, 01:16:10 PM »
Congratulations guys, another very successful step.

Lots of valuable data and familiarisation that will set you up for a good "first" crack at the salt.
I can only imagine how disappointed you all were not to be at the salt this year but its all going feel very natural by the time the salt is ready for you next year.

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Offline desotoman

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Re: NACA 66 Special A/BGS
« Reply #875 on: September 30, 2013, 02:46:17 PM »
Congratulations on your outing.

And a big THANK YOU to Sparky and JoeA for the loan or ? of the tires which made this possible.

Tom G.
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Offline Dr Goggles

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Re: NACA 66 Special A/BGS
« Reply #876 on: September 30, 2013, 04:30:08 PM »
AWESOME!!!!

The way the exhaust leaves the tip of the tail says it all, sensational car that.Great to see everything coming together so well. Congratulations again.
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Re: NACA 66 Special A/BGS
« Reply #877 on: September 30, 2013, 06:26:43 PM »
Brandon, just posted this in the Wilmington Picture Thread:
In the second video it looks like the top of the wheel covering is moving around as speed increases.
Is it just me or does anyone else see it? I don't think the camera is playing tricks because I don't see it anywhere else.

Gregg

Offline Glen

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Re: NACA 66 Special A/BGS
« Reply #878 on: September 30, 2013, 06:41:24 PM »
I see it but the vehicle is rigid mounted in the rear and could be track surface causing the flutter, might need a stiffner added. The front view wasn't that clear, it could also be the camera mounting.On the vesco liner we have two forward and two facing aft. adding one more in the cockpit as well. They really tell a good story of our runs.
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Offline tauruck

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Re: NACA 66 Special A/BGS
« Reply #879 on: September 30, 2013, 11:04:05 PM »
Rob, I watched both videos. Nice stuff. The car looks great. What a job you guys did!!! :cheers:

Offline robfrey

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Re:
« Reply #880 on: October 01, 2013, 09:10:46 AM »
It's definitely not the wind causing movement on the wheel fairing. It was the bumpy ride. Overall it is very smooth and I'm certainly not complaining. No way around those expansion joints. I can't wait to get back to Wilmington next year for more testing and to get Brandon in the car. We probably should have let the air pressure of rear tires down to 50 from 90psi. Would have rode much smoother. Never even thought of it.
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Offline robfrey

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Re:
« Reply #881 on: October 01, 2013, 09:12:41 AM »
We are considering El Mirage but wow, that's a long ride.
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Offline Glen

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Re: NACA 66 Special A/BGS
« Reply #882 on: October 01, 2013, 09:29:52 AM »
El Mirage is a long trip and IFFY this time of year. You would be restricted to the full drivers tests and if lucky to get two runs in. As november is a two day meet maybe 4 runs. The lake bed is pretty soft and bumpy at times. If I were you continue with the testing at Ohio then to Bonneville.  :cheers:
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Offline Finallygotit

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Re: NACA 66 Special A/BGS
« Reply #883 on: October 01, 2013, 04:01:02 PM »
I agree.  And if the winds crank up at Elmo in the afternoon, like they usually do, you will have even less time for runs.
« Last Edit: October 01, 2013, 06:07:18 PM by Finallygotit »
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Offline joea

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Re: NACA 66 Special A/BGS
« Reply #884 on: October 01, 2013, 04:38:08 PM »
good stuff Rob...on the "smoothness"....good the way you tested...more "real" world...in that Bonneville
wont generally be "smoother"....and the speeds MUCH higher as well as the accompanying forces....