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Search took 0.05 seconds. Search: Posts Made By: instarx
Forum: Aerodynamics 01-22-2012, 12:29 PM
Replies: 34
Views: 11,706
Posted By instarx
I realize you may be trying to be funny, but that...

I realize you may be trying to be funny, but that sort of comment - whether it be directed at Europeans, gays or anyone else - is inappropriate and should have no place in this forum.

Frankly, as...
Forum: Off-Topic Tech 12-18-2011, 09:34 AM
Replies: 55
Views: 31,268
Posted By instarx
The waste-oil heaters being discussed here have a...

The waste-oil heaters being discussed here have a separate combustion chamber or flu pipe. Mixing waste oil with unvented kerosene heaters that simply use a wick to heat air in the room is a very...
Forum: Aerodynamics 11-05-2011, 02:17 AM
Replies: 11
Views: 2,790
Posted By instarx
There is a good technical article from Tire rack...

There is a good technical article from Tire rack on rolling resistance and diameters of new tires and what to expect when installing new ones.

Tire Tech Information - Tire Rolling Resistance Part...
Forum: Aerodynamics 07-28-2011, 07:51 AM
Replies: 19
Views: 3,644
Posted By instarx
Lips also provide mechanical stiffening to the...

Lips also provide mechanical stiffening to the dam.
Forum: DIY / How-to 05-29-2011, 12:27 PM
Replies: 29
Views: 6,148
Posted By instarx
There is a reason for paragraphs.

There is a reason for paragraphs.
Forum: Aerodynamics 05-01-2011, 05:49 PM
Replies: 61
Views: 11,410
Posted By instarx
Well, some, but probably not much. Remember that...

Well, some, but probably not much. Remember that the air moving through the mesh at stoplights is moving slowly and therefore there isn't much resistance from the mesh. You could of course carry it...
Forum: Aerodynamics 05-01-2011, 01:38 PM
Replies: 61
Views: 11,410
Posted By instarx
Δ "Rated for"? You sound very...

Δ

"Rated for"?


You sound very confident. However, this is opposed to everything I was taught in grad school about pressure, flow, velocity and how they relate to resistance to airflow. ...
Forum: Aerodynamics 05-01-2011, 07:40 AM
Replies: 61
Views: 11,410
Posted By instarx
I think using screening as an air block material...

I think using screening as an air block material that is invisible to airflow at low speed and opaque to air flow at high speed is brilliant.

It is common knowledge in ventilation system design...
Forum: Aerodynamics 04-26-2011, 07:00 PM
Replies: 56
Views: 45,528
Posted By instarx
You might be interested in this article where...

You might be interested in this article where tire spats were evaluated for lift and drag on a Prius. Evidently drag reduction is very sensitive to size, placement, and angle. Make them too large...
Forum: Aerodynamics 03-28-2011, 05:09 AM
Replies: 31
Views: 7,646
Posted By instarx
Hmm. A lot of reasons posted as to why the...

Hmm. A lot of reasons posted as to why the smooth wheel covers here aren't really worse than the alloys for smoothing airflow, despite the clear visual indication that they are. On this car the...
Forum: Aerodynamics 02-17-2011, 03:36 AM
Replies: 43
Views: 10,038
Posted By instarx
Gee, aerohaed. When I posted this exact article...

Gee, aerohaed. When I posted this exact article to EM in 2008 because I thought people might like to read about new trends in automotive edge design you thought it was useless, deceptive, poorly...
Forum: General Efficiency Discussion 02-12-2011, 11:55 PM
Replies: 3
Views: 3,671
Posted By instarx
The switch to JP-8 was quite promising because it...

The switch to JP-8 was quite promising because it has already been done. Note that this report was written 22 years ago in 1989. The military currently uses JP-8 or slight variants for all their...
Forum: General Efficiency Discussion 01-03-2011, 06:48 AM
Replies: 156
Views: 22,180
Posted By instarx
Trucks don't have to pass crash tests. In fact,...

Trucks don't have to pass crash tests. In fact, cars don't have to pass crash tests - they just get ranked.
Forum: EcoModding Central 11-21-2009, 07:40 AM
Replies: 16
Views: 2,570
Posted By instarx
When I was driving the Rockies I kept flares, a...

When I was driving the Rockies I kept flares, a tow-strap, spare coat, blanket, kitty litter, jumper cables, a couple of cans of Sterno and some granola bars in the car. These days I live where AAA...
Forum: Aerodynamics 10-10-2009, 05:35 PM
Replies: 30
Views: 11,140
Posted By instarx
I used to do nuclear clean-room filter testing...

I used to do nuclear clean-room filter testing and duct tracing using smoke generators. Google DOP or dioctyl phthalate smoke generators. You can buy them or make them. Some are as small as a tin...
Forum: Aerodynamics 10-08-2009, 06:00 AM
Replies: 206
Sticky: CdA list
Views: 246,004
Posted By instarx
Volvo V70/V70 XC 2001-2009 Aerodynamic...

Volvo V70/V70 XC 2001-2009

Aerodynamic coefficient, Cd 0.30
Width 1804 mm (71 inches)
Height 1465 mm (57.6 inches)
Actual Frontal area 2.23 m2 (24.00 sq. ft.)
(modifier would have been .845)...
Forum: Aerodynamics 12-20-2008, 05:36 AM
Replies: 25
Views: 5,812
Posted By instarx
NYTimes Aero Article - Edgy, Yet Still Aerodynamic

Nice article in the New York Times today about aero designs and where car-makers are heading with edge design. Several interesting pictures.
...
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