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Search took 0.02 seconds. Search: Posts Made By: j-c-c
Forum: Off-Topic Tech 04-19-2024, 07:43 AM
Replies: 3
Views: 99
Posted By j-c-c
The point I was making is when a car winch cable...

The point I was making is when a car winch cable breaks in use from overloading, likely both ends of the newly separated winch cable recoil at very high speeds, and having a length up to say 50',...
Forum: Aerodynamics 04-16-2024, 01:53 PM
Replies: 40
Views: 24,227
Posted By j-c-c
I like the wire routing solution, except it is a...

I like the wire routing solution, except it is a huge stress riser in a monocoque structure. that rests on an admittedly flexible sub frame.
Forum: Aerodynamics 03-16-2024, 11:36 PM
Replies: 10
Views: 497
Posted By j-c-c
This a 1967 Ford GT-40 MarkIV turbine style...

This a 1967 Ford GT-40 MarkIV turbine style wheel, which predated the Porsche. Both cars I saw 3/14/24 ironically at the Sebring track Museum while attending the 12 Hr races.
Forum: Aerodynamics 03-16-2024, 07:06 AM
Replies: 10
Views: 497
Posted By j-c-c
I agree, two main sources of aero drag I see...

I agree, two main sources of aero drag I see here, induced drag on the car body by maybe adding air where it disturbs the existing proper/acceptable air flow, and rotational air drag of the rotating...
Forum: Aerodynamics 03-12-2024, 11:18 PM
Replies: 13
Views: 408
Posted By j-c-c
Well at least I learned a new word, "pleonasm",...

Well at least I learned a new word, "pleonasm", in layman's terms, a redundant non anti oxymoron? :eek:
Forum: Aerodynamics 03-11-2024, 07:03 AM
Replies: 23
Views: 5,206
Posted By j-c-c
You understand my use of "wicker bill" previously...

You understand my use of "wicker bill" previously here was just an analogy as to shape and partially function, not to the typical rear DF wing use they are known for? Regardless liked or not, they...
Forum: Aerodynamics 03-09-2024, 10:37 AM
Replies: 23
Views: 5,206
Posted By j-c-c
If the "L" is on the bottom of the side skirt and...

If the "L" is on the bottom of the side skirt and faced outward, it's thought the air flowing downward on car's side is now directed outward, helping to extract air already underneath car, a big plus...
Forum: Aerodynamics 02-02-2024, 11:33 AM
Replies: 13
Views: 691
Posted By j-c-c
Simplistically: A spoiler in my world...

Simplistically:

A spoiler in my world "spoils" air flow on one side, upwind, the amount of spoiling is often adjusted by its angle to the air flow, and only requires air flow on one side

A wing...
Forum: Aerodynamics 01-26-2024, 11:29 PM
Replies: 13
Views: 691
Posted By j-c-c
I don't disagree but, A "flat horizontal...

I don't disagree but,
A "flat horizontal spoiler" is a classic oxymoron?
Kinda of like using a flat horizontal panel as an air brake?
Forum: Aerodynamics 01-10-2024, 12:59 AM
Replies: 218
Views: 24,134
Posted By j-c-c
I guess if we ignore concentrated ponding...

I guess if we ignore concentrated ponding effects, constant turbulence/buffeting on both surfaces, repeated dynamic road induced unknown g shock loads, it should fly, so to speak.
Forum: Aerodynamics 01-06-2024, 06:38 PM
Replies: 218
Views: 24,134
Posted By j-c-c
So the answer is "yes" maybe?

So the answer is "yes" maybe?
Forum: Aerodynamics 01-06-2024, 11:56 AM
Replies: 218
Views: 24,134
Posted By j-c-c
I've lost track here, is your shared experience...

I've lost track here, is your shared experience with fabrics/vinyl's or rigid materials regarding belly pans?
Not sure cars can ever collect enough water to have ponding a serious concern due to...
Forum: Aerodynamics 01-05-2024, 11:48 AM
Replies: 211
Views: 50,872
Posted By j-c-c
Where the above 5 aero mods in any particular...

Where the above 5 aero mods in any particular order?
Forum: Aerodynamics 01-04-2024, 08:24 AM
Replies: 218
Views: 24,134
Posted By j-c-c
"care was taken" but a vehicle driven maybe 600...

"care was taken" but a vehicle driven maybe 600 miles continuously in foul weather must be designed to prevent ANY collection of increasing water build up with a system subject to "ponding". "care...
Forum: Aerodynamics 01-01-2024, 03:52 AM
Replies: 218
Views: 24,134
Posted By j-c-c
Another consideration of a significant downside...

Another consideration of a significant downside not yet mentioned with "impregnable" fabrics used horizontally, especially with topside stiffeners, if any water is trappable above, from drainage...
Forum: Off-Topic Tech 12-29-2023, 11:51 AM
Replies: 103
Views: 7,665
Posted By j-c-c
Your first comment here is cherry picked. It's...

Your first comment here is cherry picked. It's extremely rare condition a drum or any brake will fade in its first application. Nobody is arguing a disc brake can have better heat dissipation, but a...
Forum: Aerodynamics 12-28-2023, 11:28 PM
Replies: 218
Views: 24,134
Posted By j-c-c
"No visible flutter was observed, but that...

"No visible flutter was observed, but that doesn't say that it couldn't,"

And a big reason I suspect was one side was a restricted confined space on one side that likely dampens the flexible...
Forum: Aerodynamics 12-19-2023, 07:33 PM
Replies: 218
Views: 24,134
Posted By j-c-c
You guys are losing me. Billboard covers are...

You guys are losing me.
Billboard covers are for finite use, they have a solid backing (PW?) in most applications for a number of reasons, mainly being to prevent any movement to enhance readability...
Forum: Aerodynamics 12-14-2023, 12:37 AM
Replies: 218
Views: 24,134
Posted By j-c-c
The free air on both sides is the issue, and why...

The free air on both sides is the issue, and why I mentioned the somewhat inept attempt to close off the many openings, I seriously doubt anyway a piece of fabric can be in that application tensioned...
Forum: Aerodynamics 11-30-2023, 11:18 PM
Replies: 44
Views: 1,693
Posted By j-c-c
Then why are most tuff tests at multiple speeds...

Then why are most tuff tests at multiple speeds faster on the road and/or in a tunnel?

It's IMO a lot easier to securely fasten a camera for 20? mph tests than messing with a drone and nearby...
Forum: Aerodynamics 11-29-2023, 09:06 PM
Replies: 44
Views: 1,693
Posted By j-c-c
I have no idea, but not to lose sight of the...

I have no idea, but not to lose sight of the filming problem of using a drone unable to keep pace with a straight-line high speed tufted vehicle, using two different radii for the vehicle and the...
Forum: The Lounge 11-29-2023, 07:18 PM
Replies: 81
Views: 3,780
Posted By j-c-c
I have fine-tuned/upgraded my RV electrical...

I have fine-tuned/upgraded my RV electrical design. I will use a 31 AGM dual purpose battery for mainly starting, and have 100Ah Li battery and 12V inverter for small essentials, both charged by a...
Forum: Aerodynamics 11-28-2023, 11:28 AM
Replies: 44
Views: 1,693
Posted By j-c-c
The idea of a circular road tuff test with the...

The idea of a circular road tuff test with the drone flying on a reduced radius flight path to compensate for its limited air speed has merit IMO, but does not account for the constant yaw aero...
Forum: Aerodynamics 11-27-2023, 11:51 AM
Replies: 44
Views: 1,693
Posted By j-c-c
All worthy points. I like #6, very clever. ...

All worthy points.
I like #6, very clever.
#8, I am too much of a blunt body to attempt such gymnastics
#9 extra safety, my other concern would be the sheet metal, paint, and potential glass...
Forum: Aerodynamics 11-20-2023, 07:09 PM
Replies: 44
Views: 1,693
Posted By j-c-c
1. So your racket thread is slightly larger than...

1. So your racket thread is slightly larger than my current grid solution, .030"
2. My grid openings are projected nearly 4 times larger.
3. Is the downstream "wake" measurement you note observed...
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