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Search took 0.07 seconds. Search: Posts Made By: Bicycle Bob
Forum: General Efficiency Discussion 01-12-2024, 12:01 AM
Replies: 966
Views: 72,776
Posted By redpoint5
I've heard both sides of this argument from many...

I've heard both sides of this argument from many angles. New ideas always have to contend with dogma. Most new ideas fail against established patterns because most ideas are not better. Innovation...
Forum: Aerodynamics 01-20-2023, 10:23 AM
Replies: 1,307
Views: 163,651
Posted By Piotrsko
The small experiences my excompany had attempting...

The small experiences my excompany had attempting to make the nasa flush duct for aerospatial tells me it's really fussy in the original configuration. We met the drawing tolerances, modded it even...
Forum: Aerodynamics 12-29-2021, 01:14 PM
Replies: 1,307
Views: 163,651
Posted By freebeard
There is a clue on the sidepod: Vault-tec. ...

There is a clue on the sidepod: Vault-tec.

https://www.thedrive.com/content/archive-images/fallout4cars_hero.jpg?width=1440&quality=70
thedrive.com/.../the-completely-insane-cars-of-fallout-4...
Forum: Aerodynamics 11-10-2021, 02:44 PM
Replies: 4,211
Views: 1,320,720
Posted By freebeard
I would include being able to reach the glass,...

I would include being able to reach the glass, for cleaning it if nothing else.

3/4 tonneau, helmet and goggles. :thumbup:
Forum: General Efficiency Discussion 10-29-2021, 04:00 PM
Replies: 12
Views: 1,353
Posted By ksa8907
IEEE 802.11p is an approved amendment to the IEEE...

IEEE 802.11p is an approved amendment to the IEEE 802.11 standard to add...This includes data exchange between high-speed vehicles and between the vehicles and the roadside infrastructure......
Forum: Aerodynamics 10-24-2021, 06:36 PM
Replies: 636
Views: 442,852
Posted By tomi_k
Toyota Tundra 2011, 5.7litre (4x4): EPA (hwy) -...

Toyota Tundra 2011, 5.7litre (4x4): EPA (hwy) - 13.84liters / 100km (16.99mpg)

-Standard setup (no caps, no tonneau cover or any other mods): 13.8-14.2 liters / 100km, target speed of 110km/h.
...
Forum: Aerodynamics 10-23-2021, 05:25 PM
Replies: 636
Views: 442,852
Posted By tomi_k
This is first tuft test... ...

This is first tuft test...

https://ecomodder.com/forum/member-tomi_k-albums-toyota+tundra+2011-picture9039-20210905-183334-01.jpg
Forum: Aerodynamics 06-27-2021, 10:46 AM
Replies: 7
Views: 1,152
Posted By kach22i
Video from original link/post: ...

Video from original link/post:

https://www.youtube.com/watch?v=PkHCc_6RUaM&t=6s

Interesting.
Forum: Aerodynamics 06-25-2021, 06:37 PM
Replies: 636
Views: 442,852
Posted By JulianEdgar
Unfortunately, some of these rules are deceptive...

Unfortunately, some of these rules are deceptive or incorrect. Looking at any low drag current car quickly shows that.

For example, the 'body must be as rounded as possible' applies only in parts...
Forum: Alternative Transportation 02-06-2021, 05:58 PM
Replies: 386
Views: 106,268
Posted By The Toecutter
Most of it is actually left over Gorilla Tape...

Most of it is actually left over Gorilla Tape adhesive. Hopefully that will come off too!

This thing is a lot of fun to ride and very practical to use.

An effort that could be maintained for...
Forum: Alternative Transportation 02-05-2021, 02:59 PM
Replies: 67
Views: 16,002
Posted By The Toecutter
My electric velomobile

Pics of the bike:

https://i.imgur.com/1KvhZN8.jpg
https://i.imgur.com/fBOfwwl.jpg
https://i.imgur.com/j75uGn7.jpg
https://i.imgur.com/PuzRKBX.jpg
https://i.imgur.com/1aaEtdp.jpg...
Forum: Aerodynamics 02-02-2021, 03:56 PM
Replies: 1,307
Views: 163,651
Posted By kach22i
Not aero-treatments, just fancy mud flaps. ...

Not aero-treatments, just fancy mud flaps.

Here's What Inspired The Threatening Front Splash Guards On The Awesome New Singer ACS...
Forum: Aerodynamics 09-24-2020, 06:10 PM
Replies: 4,211
Views: 1,320,720
Posted By JulianEdgar
Yes, that's the issue.

Yes, that's the issue.
Forum: Aerodynamics 09-23-2020, 04:45 PM
Replies: 4,211
Views: 1,320,720
Posted By JulianEdgar
Incorrect. The literature is actually all over...

Incorrect. The literature is actually all over the place for 'best angle for lowest drag' for a diffuser.



Correct.
Forum: Aerodynamics 09-20-2020, 03:55 PM
Replies: 1,307
Views: 163,651
Posted By Vman455
The Hybrid still has air curtain ducts, but a...

The Hybrid still has air curtain ducts, but a single vent on each side.

Audi is also using the double-vent setup on its forthcoming e-tron S and e-tron Sportback S:
...
Forum: Aerodynamics 08-07-2020, 01:05 AM
Replies: 4,211
Views: 1,320,720
Posted By freebeard
https://www.youtube.com/watch?v=NT8PMXCMrsM ...

https://www.youtube.com/watch?v=NT8PMXCMrsM
Every part of this has been thought about. It has air-cooled tail lights. The louvers for the cooling air are shaped like parabolic NACA ducts.

That...
Forum: Aerodynamics 07-06-2020, 01:27 PM
Replies: 4,211
Views: 1,320,720
Posted By aerohead
Cd 0.37 - .38

I believe that this is the number shared by GM. That would be from scale- model testing at the GALCIT tunnel at Cal Tech, Pasadena, California.
As with BEVs today, there's no significant front...
Forum: Aerodynamics 04-20-2020, 02:22 AM
Replies: 141
Views: 24,643
Posted By JulianEdgar
Yes, I was surprised with what the formal...

Yes, I was surprised with what the formal (SAE-level) research papers showed re full wheel covers. I think a key point is that the wheel drag cannot be looked at in isolation eg the Tesla paper that...
Forum: General Efficiency Discussion 02-25-2020, 05:37 PM
Replies: 966
Views: 72,776
Posted By JSH
There are several reasons small cars are dying. ...

There are several reasons small cars are dying. Economics are one. This has been talked about a lot but I haven’t heard anyone talk about another big reason – Corporate Average Fuel Economy.
...
Forum: Aerodynamics 11-22-2019, 02:37 PM
Replies: 4,211
Views: 1,320,720
Posted By kach22i
Alpine M 63 #1701 - Passion et Mans...

Alpine M 63 #1701 - Passion et Mans (http://passionetmans.com/2018/11/alpine-m63-1701.html)
https://img.over-blog-kiwi.com/3/04/50/08/20181110/ob_495669_alpine-m63-1701-00.jpg
...
Forum: Aerodynamics 11-21-2019, 10:11 PM
Replies: 4,211
Views: 1,320,720
Posted By kach22i
Random TRANSPORTATION pictures - Page 2267 -...

Random TRANSPORTATION pictures - Page 2267 - Pelican Parts Forums (http://forums.pelicanparts.com/off-topic-discussions/391522-random-transportation-pictures-2267.html)...
Forum: Aerodynamics 10-20-2019, 12:40 PM
Replies: 1,307
Views: 163,651
Posted By freebeard
NASCAR roof fences. It kills lift driving...

NASCAR roof fences. It kills lift driving sideways.
Forum: Aerodynamics 09-24-2019, 04:07 PM
Replies: 4,211
Views: 1,320,720
Posted By Frank Lee
The interference issues are what I'm getting at....

The interference issues are what I'm getting at. I know from my yarn testing that anything that disturbs the flow, disrupts the flow quite a long way downstream, likely to the tail end of the vehicle...
Forum: Aerodynamics 08-26-2019, 11:07 PM
Replies: 1,307
Views: 163,651
Posted By Frank Lee
Actually, it does.

Actually, it does.
Forum: General Efficiency Discussion 08-11-2019, 05:30 PM
Replies: 966
Views: 72,776
Posted By redpoint5
That would depend on use. A hybrid that spends...

That would depend on use. A hybrid that spends most of the time in stop and go traffic on a long commute would pay for itself quickly.

A hybrid that only travels constant speed on the highway will...
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