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Search took 0.18 seconds. Search: Posts Made By: BamZipPow
Forum: Aerodynamics 10-05-2024, 12:43 AM
Replies: 1,090
Views: 280,913
Posted By freebeard
First post since 2023-05. Good to hear from you...

First post since 2023-05. Good to hear from you again.

Well, is it?
Forum: Aerodynamics 10-03-2024, 12:48 PM
Replies: 247
Views: 16,287
Posted By JohnForde
2 more pics of the tail, pre trip. Second one...

2 more pics of the tail, pre trip.
Second one shows L bracket for structure hanging out in the wind.
Forum: Aerodynamics 10-03-2024, 11:14 AM
Replies: 247
Views: 16,287
Posted By aerohead
' trip '

You may want to alter your 'flight plan' and drive Zevo directly to New York's Museum of Fine Art!
That's where she belongs.
And wherever you're going, I suspect that you're gonna have some...
Forum: Aerodynamics 10-01-2024, 04:04 PM
Replies: 247
Views: 16,287
Posted By aerohead
' configuration'

If the 'upper' radii were also applied to the 'bottom', you would essentially have re-created the 'GM OPTIMUM Fairing' ( boat tail ) of 1980, a 'known quantity'; and I could, with a clear conscience,...
Forum: Aerodynamics 10-01-2024, 08:12 AM
Replies: 13
Views: 1,376
Posted By Piotrsko
SOME aircraft are mostly fabric covered, early...

SOME aircraft are mostly fabric covered, early piper cubs as an example, my 1950 pacer as another. Cowling, couple of fairings and landing gear are the exceptions.

Up to 160 mph VNE / 257kph you...
Forum: Aerodynamics 09-30-2024, 06:13 PM
Replies: 247
Views: 16,287
Posted By JohnForde
I am going on a 1500 mile drive beginning...

I am going on a 1500 mile drive beginning Thursday (Black Hills SD). I needed to settle on a configuration. I just rounded the top corners today. Took all day. I used 16" diameter concrete forming...
Forum: Aerodynamics 09-26-2024, 01:29 PM
Replies: 247
Views: 16,287
Posted By JohnForde
I can go back to 11 degrees. Simple repostioning....

I can go back to 11 degrees. Simple repostioning. My enthusiasm for 16 degrees came from observing attached tufts.
I am going on a 1500 mile trip Oct 3-7 and should settle on a configuration.
Forum: Aerodynamics 09-26-2024, 11:22 AM
Replies: 247
Views: 16,287
Posted By aerohead
' eleven -to- sixteen degrees '

I've mentioned that we have no direct analogue to Zevo, as related to reported test data.
P. T. Bearman did test a prismatic 'Windsor' saloon body square-back in 1984, which included 11-degrees,...
Forum: Aerodynamics 09-25-2024, 09:41 PM
Replies: 247
Views: 16,287
Posted By JohnForde
After tilting the floor yesterday today I...

After tilting the floor yesterday today I tightened the angle of the doors from 11 deg to 16 deg. The wake width is reduced from 48" to 34". Tomorrow I will cut away excess.
Forum: Aerodynamics 08-02-2024, 12:58 PM
Replies: 13
Views: 1,376
Posted By Logic
Some pics of fabric coverings ...

Some pics of fabric coverings
https://victoriancollections.net.au/media/collectors/4f729f8097f83e0308601955/items/57623da0d0cdd110fca5f244/item-media/623a7de06851323cf2668a55/item-350High.jpg
...
Forum: Aerodynamics 08-02-2024, 07:48 AM
Replies: 13
Views: 1,376
Posted By Logic
Aircraft fabric covering: Great for boat tails etc:

Coroplast over a steel tube frame seems to be the 'go to' method of building Boat Tails etc here.

There's a lighter, easier method:
Light Aircraft and gliders/sailplanes use a similar underlying...
Forum: Aerodynamics 07-23-2024, 08:29 AM
Replies: 247
Views: 16,287
Posted By JohnForde
A guy can dream. I should have numbers in a week.

A guy can dream. I should have numbers in a week.
Forum: Aerodynamics 07-22-2024, 10:49 AM
Replies: 247
Views: 16,287
Posted By aerohead
' yellow perimeter '

1) If choosing, I'd go with less than 14-degrees.
2) And it would integrate into the 'cuff' itself, where the local tangent angle agrees with the design slope angle.
3) If the slope begins on the...
Forum: Aerodynamics 06-24-2024, 11:12 AM
Replies: 247
Views: 16,287
Posted By aerohead
' tail '

1) For a 'rigid' construction, the Highway Patrol is going to cite you for illegal length for anything beyond 48" of elongation.
2) If your swing-out 'stinger' ( which I like very much! ) were an...
Forum: Aerodynamics 06-21-2024, 10:33 PM
Replies: 247
Views: 16,287
Posted By JohnForde
First Electric van boat tail

By extreme good fortune and a little guile I I got my hands on the first built from the ground up Electric Van in the US. It's a GM/Brightdrop Zevo 600. I have had it since Sept 23. It's pretty...
Forum: Aerodynamics 05-28-2024, 03:56 AM
Replies: 3
Views: 573
Posted By Logic
On the subject of inspiration: ...

On the subject of inspiration:
https://www.youtube.com/watch?v=f708GtL6tns&t=63s

Thing is: You can hear him screaming like a girl every time the wind catches him between buildings.
No doubt...
Forum: Aerodynamics 05-13-2024, 01:29 PM
Replies: 26
Views: 7,299
Posted By aerohead
rear bumper 'drag'

Subaru spent a bit of wind tunnel time exploring the aerodynamics of their XT's rear bumper.
In order to reduce drag, the rear fascia was 'lowered' down to where a 'slow' diffuser might have lived,...
Forum: Aerodynamics 05-11-2024, 12:28 AM
Replies: 26
Views: 7,299
Posted By freebeard
Hows about gutters? can I turn RAIN GUTTER in...

Hows about gutters?
can I turn RAIN GUTTER in to SIDE SKIRTS?!??! (https://www.youtube.com/watch?v=BoMeuvSXh78)
Forum: Aerodynamics 05-10-2024, 06:44 AM
Replies: 12
Views: 2,681
Posted By Vekke
Finally got protowheels with similar looks. ...

Finally got protowheels with similar looks.
https://youtu.be/MYWfjHEfvG8

My instructions how to make those blocking plates as easy as possible with very nice looks:
https://youtu.be/GK01mFnBK6k...
Forum: Aerodynamics 05-02-2024, 11:45 AM
Replies: 1,090
Views: 280,913
Posted By aerohead
' Bam's trailer '

Bam's trailer is hinged to a transverse spar, welded to the 2-inch 'male' pipe which engages the receiver hitch.
It articulates in 'pitch', dampened by duel air-springs.
Forum: Aerodynamics 05-02-2024, 11:36 AM
Replies: 1,090
Views: 280,913
Posted By aerohead
U-joint

-------------------------------------------------------------------------------------
I'm using a zero-rake, collapsed motorcycle front fork, with the front axle serving as the pivot-point for...
Forum: Aerodynamics 05-01-2024, 06:48 PM
Replies: 1,090
Views: 280,913
Posted By freebeard
BamZipPow's example is not articulated. I've...

BamZipPow's example is not articulated.

I've only seen one-wheel articulated trailers on motorcycles.
Forum: Aerodynamics 01-16-2024, 08:23 AM
Replies: 1,090
Views: 280,913
Posted By Tahoe_Hybrid
anything extending out more then a two feet...

anything extending out more then a two feet require it that is a non marked trailer at lest a red flag
Forum: Aerodynamics 07-29-2023, 04:25 PM
Replies: 156
Views: 35,361
Posted By CigaR007
So I hit somewhat of a snag while looking at the...

So I hit somewhat of a snag while looking at the rear diffuser. The entire structure was slanted towards the rear. Newbie mistake, as I was mostly working at an angle, the car being on plastic ramps....
Forum: Aerodynamics 07-23-2023, 10:41 AM
Replies: 863
Views: 84,992
Posted By alexshock
Use special nuts instead: ...

Use special nuts instead:
https://ecomodder.com/forum/attachment.php?attachmentid=33992&stc=1&d=1690123255
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