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It's not just air flow which matters but also static pressure. A great example might be comparing a bladed fan to a squirrel cage blower. The fan might move more air under no back pressure for any given power consumption. However, if you stick it in a long duct, it may move next to nothing...

Excellent! That's pretty much around where I am on rides of that length (when I'm riding regularly anyway). Lately my averages have mostly wallowed in the mid to high 14s, entirely a result of not riding all that much. 5 rides in March, 4 in April, 5 in May, barely over 200 miles total. Last...

On the cadence, there's really no set number to aim for, although in all honestly pushing a high gear at much under 60 RPM in never a good idea. Consider 60 RPM as sort of the rock bottom of what you should be aiming for. At this point, the first order of business is to just get your legs used...

Now I have my own uphill battle to fight. Sick all these week, including bedridden sick with a high fever for 3 days. Tonight was the first ride since last Saturday. Surprisingly, the speed wasn't bad (14.8 mph average actually), but no endurance. I went 7.6 miles, then the congestion flared...

Ugh. I know that feeling all too well. It happened on a ride this March. Getting out of the city seemed kind of easy, too easy actually, given that it was only the 3rd time since December that I was on the bike. Coming back, I knew why. :arge: 15-20 mph headwind nearly the entire 10 miles...

Maximum emergency braking rate depends upon track adhesion. Adhesion varies with speed (it's way less at high speeds). On good track, figure you can obtain an average deceleration of around 0.1g (2.2 mph/sec). At that rate, it'll take you about 4 km to stop from 320 km/hr. A more typical...

Just make sure you still have enough fluid left in the system so that you still have brakes. I'm really surprised there isn't an expansion chamber or some other means of temperature compensation in these hydraulic brake systems.

Found these on YouTube, both of TGVs accelerating to 320 km/hr: http://www.youtube.com/watch?v=qbKEeHzuBwc http://www.youtube.com/watch?v=Jy_BWdNFCkA&NR=1 Love the sound of the traction motors as the speed picks up. And the driver in the second video, shown right around 3:35, bears a...

Not a good idea to go hard at the start of a ride. In fact, it's an awful idea. In addition to road riding, I've been using the Schwinn 240 recumbent downstairs. I go for an hour at a time. My goal is to go at a hard enough pace so I have nothing left after the hour. However, the first few...

My Raleigh dates from the mid 1980s. It could probably use a repainting at this point given the appearance of rust on the bottom bracket. Otherwise, it's still pretty serviceable. I did upgrade it around 2 years ago with Shimano brifters, a 10-speed cluster, new rims, and airless tires. The...

I ride in the same clothes I wear the rest of the time. I'm big on pants also as I want something between my skin and the road if I crash. If your butt starts hurting after a while then you need to get a seat with more padding, or clothing with more padding. The second issue is the crotch...

Congratulations, Chewy! :drunk: :tgif:

That's an awful lot of conservation, even by European standards. Ideally, just using less power is always the best way to go, if that's possible. The question is how much can you cut while still maintaining a lifestyle that people will accept. I know going LED for lighting is projected to cut...

That's probably the dumbest, most hysteria-driven, most short-sighted decision I've ever seen in my life. Fusion isn't going to online by 2022 even by the most optimistic projections (even 2050 seems optimistic). Exactly what are they going to use to generate power? They better hope for super...

Television could be vastly improved by just getting rid of the commercials. If people see at the end of their program a quick announcement "This program sponsored by company A, makers of widget B", they might actually be inclined to buy the product. Most commercials have exactly the opposite...

Harold Camping He "predicted" the end of the world in 1994 also.

Now that this guy is 0 for 2 predicting the end of the world, I suggest a new holy book. This one sounds good.

6:01 PM and I'm still here. Not that I was expecting any different. ;)

Will you at least let him bath/go to the bathroom? What are you using to keep him immobile? Man, I hope I never get on your bad side. :-o

You know something, time, your mention of LNG buses just reminded me of a whole sequence of events which actually more or less proves what I just wrote. As you're undoubtedly aware, back in the late 1800s/early 1900s, trolleys served essentially the same function buses do today. And they...

Putting aside the huge risk of contaminating drinking water supplies from hydrofracking natural gas, I'm not sure the supplies are abundant enough to make much of a dent in oil supplies. Assuming they are, and assuming we can find a better way to extract the natural gas which doesn't put water...

Sorry you feel that way. And the position you described actually is closer to that of what you might describe as the tree-hugger crowd, of which I'm most definitely not. These people want to keep our modern standard of living, but say no to every single thing which fails to meet their...

Chewy, mass transit is certainly expensive, but it doesn't cost much money or take much time to build separated cycle tracks. I realize those probably wouldn't be of much use to you personally given your commute distance, but for a lot of people who currently drive a few miles, suddenly biking...

Yes, because that's the only thing which will get people off oil for good. Funny how I remember you bitching like crazy about the subsidies the government gives for solar, wind, etc. I guess subsidies are fine in your book if they're for something you personally use, but not for something...

Bozo, The real solution is just to lessen the need to travel. Live closer to work, telecommute, buy locally grown food, etc. And electrics are more than ready for prime time. Much of the charging would be do overnight, when power plants actually have energy to spare. You don't need to...

Chewy, My last post is more an idea of what we could do if we built the right infrastructure, not what is. The present reality is that lots of people have few alternatives to driving, unfortunately. My question is why isn't the government doing everything in their power to change that in the...

Wasn't Congress just talking about eliminating the $2 billion in tax breaks it gives to the oil industry? A special tax break equals a subsidy, which in turn equals lower prices at the pump than would otherwise be. Given all the negatives associated with fossil fuel use, subsidizing it is...

Never mind just teenagers. For distances of about 5 miles or less, if you're not carrying much cargo, a bike isn't a bad way to get around. That's doubly true in large cities. I make as good or better time on most of my bike trips than you would by car. And I have at times gone 20 miles each...

There actually are some technical reasons to back up Merc's disdain for WD: "Western Digital's construction makes drives particularly vulnerable to shocks and pressure. Unlike other manufacturers, WD does not secure the hard drive axle with a separate screw to the drive cover. Because of this...

You discovered that also. I've been lusting after the Rohloff from the day I saw it. Stick that on a velomobile, along with the Schlumpf high-speed crankset with planetary gears, and you have a nice, super-wide range drivetrain with no derailleurs. Doing some math, I figured use the 2.5X...

Yeah, but then I wouldn't know exactly how much further or faster I'm going. :-D Speaking of further and faster, if money were no object, I would be riding one of these.

Yeah, you both noticed that big drop in elevation also. :-D Kind of funny when you think about it. I should show it to the NYCDOT. I think the real reason it occurred might have to do with the sudden change in antenna orientation and possibly the shock from hitting the ground. That might...

Actually, the GPS is pretty sucky as a speedometer which is why I also have a bike computer. The speed readings bounce around by about 1 mph even if you maintain a steady speed. I'm mainly using the GPS to record my rides. I'm interested, for example, in my average speeds over the same roads...

I literally don't even remember the last time I puked, that's how long it's been. And I don't remember the exact date that I last fell off my bike for any reason at all except that it was before 9/11. Yep, going on at least 10 years with no "hit the ground" bike accidents whatsoever. Two...

If cell phones no longer work I'll consider that a positive effect.

Speaking of systems going a long time, didn't Greg know someone who was still using something like an 8086 (and this was only a few years ago IIRC)?

Yep-still in service after all these years, and still fast enough for most of my day-to-day needs. This is the longest run I've ever had on the same system. And I've been using a 200 GB Maxtor as the boot drive from day 1. The drive already had I think 2 years on it when I installed it in...

I've been using the same system since June 2006. Thus far, I've never had anything except a CPU fail in all the machines I've owned. I tend to think my usage patterns are why. The biggest source of stress for electronic components is being turned on and off. Besides creating current surges...

http://cgi.ebay.com/2-PC-Li-Ion-3-0V-200mAh-Button-Cell-LIR2477-New-BuySAFE-/300552377991?pt=LH_DefaultDomain_0&hash=item45fa515687

AARP's stance against retesting elderly drivers is that it's "prejudicial". Instead, they might support periodic retesting of ALL drivers. This wouldn't be a bad idea in my opinion, but practically speaking it would be a nightmare. It's a shame more people aren't honest enough with themselves...

5 years today since my father passed away. Doesn't seem that long ago.

Unfortunately, it's basically going to come down to the same situation as Chernobyl-anyone involved in the cleanup/containment is going to go in knowing they're not going to survive long. IIRC a few thousand workers sacrificed themselves in this way ( 100,000 according to wikipedia )...

Intrinsically Safe Nuclear Reactor Designs On other news, the workers left the site, apparently because of high radiation levels. This is inching closer to a 7 than a 6 at this point.

Those pictures are haunting. Entire settlements wiped clean as if they've never existed. This just drives home the point that Earth does what it wants and we're all just tenants here.

The French are indeed experts on nuclear power, with nuclear plants generating 78% of the electricity produced in France. What the French and Japanese did was standardize on certain components to make nuclear power more cost effective. The US has a history of one-off designs. This is one...

I agree, SD. Watching the news coverage on CNN and elsewhere, it's almost like they're hoping for a meltdown, sprouting things like previous nuclear accidents have always gotten worse before they've gotten better. My educated guess here is we've had partial meltdown. I'd say the rods melted...

If this had been further south and hit Tokyo full force it would have been an unprecendented disaster. I'm amazed how far the tsunamis spread. There was even some flooding in NJ two nights ago (saw it on the news, I guessed it was related to the quake but they didn't say). This all drives...

I finally found a great, free, third party defragger called MyDefrag. Current version is 4.3.1. The program is completely customizable via scripts. It has several default scripts for both data disks and system disks which do a great job. I managed to defragment some volumes where Windows...

I tried but unfortunately my M/B is so old that any SATA drives can't be seen in native DOS mode.

The specs say it uses 5 watts maximum ( see manual, page 48 ). I would imagine it uses a lot less if the unit is turned off but left plugged in. Even at 5 watts, it would take at least a few days to drain a car battery. I'm surprised you can't enter addresses from a PC. My Legend HCx lets me...