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-   -   if you want to see 417-mph (https://ecomodder.com/forum/showthread.php/if-you-want-see-417-mph-39263.html)

aerohead 04-02-2021 04:04 PM

if you want to see 417-mph
 
Scroll down at this site to see video shot from inside the car which beat Goldenrod's 45-year record
https://www.streetmusclemag.com/news...le-engine-car/

j-c-c 04-03-2021 02:53 PM

As a big fan of The Goldenrod record and remember the car and record well, on a human level, being broken by the father who named this new record holding car for his deceased 21 year son, who died of cancer, I'm happy for all involved for their success.:thumbup:

freebeard 04-03-2021 04:26 PM

2010. Lasted one year. Speed Demon has held the record 3 times in a row since then.

Speed Demon Race Car - George Poteet and Ron Main Land Speed Racing

I like Speed Demon for the tandem front wheel layout.

M_a_t_t 04-03-2021 05:46 PM

https://www.youtube.com/watch?v=p8kv...l=ChuckHorrell

j-c-c 04-04-2021 02:33 PM

Thanks:thumbup:
As a driver, I don't think that is my cup of tea.:eek:
I was surprised how much flutter is in the body panels, if I am interpreting the video correctly, vs camera shake.

Frank Lee 04-04-2021 03:07 PM

I thought this was going to be about George Wiseman's Magic Pickup.

TimRogers 04-05-2021 12:28 AM

Quote:

Originally Posted by j-c-c (Post 645450)
Thanks:thumbup:
As a driver, I don't think that is my cup of tea.:eek:
I was surprised how much flutter is in the body panels, if I am interpreting the video correctly, vs camera shake.

I believe the structure of the chassis is similar to a top fuel dragster; the movement could very well be from flex of the chassis itself.

j-c-c 04-05-2021 10:34 AM

I thought I saw some frame flex, which is understandable, but I would find it hard to believe that the intended allowable dragster frame flex is also useful on the flats.
Regardless, my comment was directed mainly to the visible panel flex, and in an environment were aero is king, seeing a panel move a 1/2"(?) is surprising, when on a aircraft at similar speeds a bug splatter disruption can be a concern, it seemed odd to me for this to occur.

freebeard 04-05-2021 12:13 PM

Similar to a canvas tarp on a truck at highway speeds.

Likely due to lightweighting. How to stiffen without adding weight? Possibly a layer of aerogel in a composite.

j-c-c 04-05-2021 01:51 PM

I agree, to stiffen would not be difficult if additional thickness was an option. On the flats, I have always been lead to believe, weight is a friend, in that it mainly increases traction, which is rather limited on salt, with high hp low drag packages, so unless rules have a weight component, weight is not a downside in this application.

Piotrsko 04-06-2021 09:57 AM

I will add: flexing on a top fuel dragster is promoted to improve traction. I suppose they can engineer the chassis to keep the wheels planted.

freebeard 04-06-2021 12:10 PM

Is it to improve traction or to bend instead of snapping in half?

j-c-c 04-06-2021 12:23 PM

Quote:

Originally Posted by Piotrsko (Post 645567)
I will add: flexing on a top fuel dragster is promoted to improve traction. I suppose they can engineer the chassis to keep the wheels planted.

Traction in this case is likely to keep the front tires still in contact with the pavement to allow steering corrections, rather than acceleration tractive issues.

Autobahnschleicher 04-16-2021 08:28 AM

Quote:

Originally Posted by M_a_t_t (Post 645420)

Rumors say he was still tailgated by an Audi desperately wanting to pass:turtle:
https://youtu.be/2xz9RrRs0lA
https://youtu.be/MiuLvLobAs4

j-c-c 04-16-2021 09:32 AM

Hope still springs eternal I see for Audi drivers.;)

aerohead 04-16-2021 11:34 AM

flutter
 
Quote:

Originally Posted by j-c-c (Post 645450)
Thanks:thumbup:
As a driver, I don't think that is my cup of tea.:eek:
I was surprised how much flutter is in the body panels, if I am interpreting the video correctly, vs camera shake.

Some have called it ' oil-canning' of 'tin-canning'.
I think it killed Bernd Rosemeyer, in the Auto Union racer.
According to Alex Tremulis, his streamliner's body was constructed with below-spec wall section thickness, and experienced aerodynamic deformation, causing uncontrollable yaw-induced instability that he couldn't overcome. Shame.

aerohead 04-16-2021 11:43 AM

weight
 
Quote:

Originally Posted by j-c-c (Post 645486)
I agree, to stiffen would not be difficult if additional thickness was an option. On the flats, I have always been lead to believe, weight is a friend, in that it mainly increases traction, which is rather limited on salt, with high hp low drag packages, so unless rules have a weight component, weight is not a downside in this application.

Yes, many cars experience wheelspin all the way to the final timing trap at the 8-mile.
And getting sideways is the fear. The LT1 Corvette which had been two cars ahead of me at the wind tunnel, got sideways at the finish line, lifted about 8-feet, did a half-gainer, then landed on it's roof at 231-mph. The driver was okay but visibly shaken. The car was toast ( spontaneous disassembly ).:(


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