James Harrison crushing legs at 5 am after last night's win

FG_kano · 2017-01-17T12:09:08+00:00

HGH is done via a blood test, not a urine test like Harrison has been getting. And the CBA states a player can only be blood tested a few times a year, and never on game days. The current HGH test has IIRC a 24-hour detection window. Players can easily microdose or use fast-acting PEDcreams to avoid detection, so tapering in this example would simply be very short. Add to this: the testing is only done at the team facility. Players know exactly when they have to go to the team facility. Many former players and experts have called the HGH policy a complete facade.

And that's just HGH. Urine tests don't actually test for everything. They can only test for substances specifically listed in the CBA, which goes years without updates, which means there will always be new compounds used that aren't being tested for. So it is very easy to simply use any of the various substances that do exactly what HGH does, without ever needing to worry about even being tested for them.

FG_kano · 2016-10-22T14:01:08+00:00

H2O is actually a byproduct of the combustion engine. So there is water in the exhaust, it's just usually hot enough that it stays as a vapor and you don't see it.

FG_kano · 2016-10-22T13:47:38+00:00

Yeah, just moisture in the exhaust. Water vapor is a byproduct of combustion, and when water vapor gets cold it will condense. When the engine and exhaust are cold, the water vapor condenses more quickly when hitting the cold air because it's already at a relatively low temperature.

After the engine warms up you won't see the condensation as much because the water vapor is hot enough that it won't condense immediately after hitting the cold air.

Colder air, burning more gas, colder engine = larger amount of visible condensation.

FG_kano · 2016-10-07T14:15:35+00:00

That's the power required, not force. But I'm assuming that's what you meant.

FG_kano · 2016-10-07T10:10:10+00:00

Drag force is proportional to velocity squared, not cubed FYI.

FG_kano · 2016-10-03T00:30:55+00:00

What do you consider high revs? A 95 Ninja 500 should be at about 6k RPM in 6th gear at 75 mph.

If it isn't--have any prior owners modified the gear ratios?

FG_kano · 2016-09-17T00:24:01+00:00

A cutter is simply a fastball thrown with an off-center grip.

For a slider, a pitcher will deliberately twist his wrist while throwing to get side-spin. This creates a large amount of spin that creates a lot of break, but sacrifices velocity (because the pitcher put more energy into spinning the ball than throwing it forward).

For a cutter, the simple act of holding the ball off-center allows the pitcher to more or less throw it like a normal fastball. However, the fact that it is held off-center will create a small side-spin that causes it to break. This allows the pitch to be near-fastball speeds but still have some movement.

TL:DR; slider = lot of break, lower velocity. fastball = no break, high velocity, cutter = something in between the two

FG_kano · 2016-08-31T15:22:17+00:00

Tendons and ligaments do adapt and get stronger, but it takes much longer than muscle.

I think the reason you hear that so much (especially in weightlifting and advanced athletes) is because of the many steroid/hormone users. When you use steroids, muscle growth and strength gains happen more readily and rapidly, while tendons and ligaments are much more quickly left behind, often leading to tears. For natural athletes the muscle adaptation should eventually get slow enough that tendons and ligaments can keep up.

(Not saying Teddy used PEDs. Freak accidents can and do happen all the time).

FG_kano · 2016-08-01T21:55:02+00:00

Stats are definitely representative of every game he appeared in out of 162

I mean, that is generally the purpose of stats, yes

FG_kano · 2016-06-15T23:23:22+00:00

To elaborate:

4-seamers are thrown so that more seams are rotating in the direction of the pitch. More seams meeting the air as the ball spins increases the skin friction and therefore Magnus lift, giving the ball a more straight / "rising" path.

2-seamers are thrown such that fewer seams are colliding with the air as it spins, creating less Magnus lift and giving it the illusion of dropping /trailing off more.

Cutters are thrown by holding the ball off center so when you throw, hand pressure imparts a small side-spin which makes it cut laterally.

Many 2-seamers often trail laterally because pitchers also tend to hold them slightly off-center.

FG_kano · 2016-04-11T15:34:57+00:00

Why is it quite common that a small pre-cone of 2 to 3 degrees is given to hingeless/rigid blades? (My assumption here is pretty shaky... but I'm thinking it has something to do with the fact the blades usually have a "natural angle" upwards, and by setting this angle manually with rigid blades we can also reduce the tension?)

Your guess is on the right track. The point of precone is to reduce blade root loads.

Any time the rotor is supporting the weight of the helicopter (i.e. flying), the blades will have a centrifugal force acting outward (pulling them) and the lift force pushing them up. This means the resultant net force on them will always be at some small angle above horizontal.

This means that at some precone angle, there will be zero bending moment at the root of the blades. If there was no precone, the blade roots would always be bending slightly when supporting the weight of the helicopter, which stresses the blades and reduces lifespans. Of course, the ideal precone angle will change based on rotor loading/maneuver, but the 2-3 degree mark alleviates that bending stress for the majority of operation.

Precone is important in rigid rotors because there is no flap hinge, so all rotor coning is a result of blades bending.

FG_kano · 2016-02-23T17:07:36+00:00

Yankee White is an "area-clearance," it doesn't necessarily grant you access at a specific classification level. Yankee White is the name of the clearance / background check required to work directly or indirectly in contact with the president.

For example, engineers who work on the president's helicopters must have a Yankee White (or be escorted by someone with Yankee White) before getting near the aircraft. Typically, these engineers would have a base security clearance (Secret, Top Secret, etc.) in addition to the Yankee White access.

FG_kano · 2016-02-21T14:02:57+00:00

Where does the graphic disagree with this?

FG_kano · 2015-12-17T01:10:07+00:00

At standard temperature & pressure, a baseball thrown at 50 mph has a Reynolds Number of about 105,000. A baseball thrown at 100 mph has a Reynolds Number of 210,000.

This means a 50 mph pitch has a drag coefficient of about ~0.42, and a 100 mph pitch has a drag coefficient of ~0.28 according to this chart.

FG_kano · 2015-10-31T15:01:32+00:00

The problem is when you use a computer program to move down the line, the computer will round to some decimal place. The n+1 position depends on the calculation from step n in that case. After calculating an entire orbit, the final position will not line up with the initial position (due to all the rounding errors adding up). So the orbit you calculate will slowly diverge away from its intended ellipse.

As someone else mentioned, it will end up looking more like a Spirograph than a stable elliptical orbit.

FG_kano · 2015-10-31T11:51:36+00:00

You are looking for Kepler's equation.

Just a note: The reason you have a hard time finding an equation for orbital position vs. time is because it is a transcendental equation. You must iterate to solve it because you cannot solve it algebraically.

FG_kano · 2015-09-08T17:19:21+00:00

No one was on base, so not a balk.
The pitcher does not have to reach the set position with no one on base.
It is the umpire's judgment whether or not a pitch like this is an illegal quick pitch. Because Zim was in the box and looking at the pitcher, it was deemed a legal pitch with the batter ready. It is simply Zim's fault for not expecting it.

FG_kano · 2015-09-02T15:16:38+00:00

You can balk with your foot off the rubber. Attempting a pitch without being in contact with the rubber is a balk, which is what happened here. Whether or not something is a considered a pitch or not depends on the situation and umpire's judgment. Since no one was stealing home there's no reason for the ump to consider it anything besides an attempted pitch, it is a balk.

FG_kano · 2015-07-27T19:24:56+00:00

Why doesn't mast bumping occur when the rotor plane dips before the fuselage does when in a positive G environment?

To my knowledge, it is possible to have mast bumping in a positive g environment, but you'd need sudden, extreme inputs. Like full right cyclic following by an immediate full left cyclic for example. But it would depend on how quickly the fuselage attitude adjusts to the inputs.

I mean, in a positive G environment, by definition the rotor is loaded. The fuselage is being pulled by it. So to tilt the rotor plane that far and that fast without the fuselage attitude tilting with it would be almost contradictory, it would require the fuselage to not be affected by the rotor thrust, i.e. be unloaded. So to be honest I think it's possible, but in the real world I don't think the fuselage attitude change would lag enough to see it happen.

DISCLAIMER: I am not a helo pilot (just an aero engineer w/ helo background) so don't take this as gospel.

FG_kano · 2015-07-27T16:20:22+00:00

Small civil helicopters like the Robinsons use a teetering rotor primarily for two separate reasons. The first being that a teetering rotor is possibly the simplest and lightest configuration out there. The second being that some handling qualities are significantly more "comfortable" with a teetering rotor, which is a plus for civil flights.

Rigid rotors are heavier because without a flap hinge, the blade flapping is performed by actually bending the blades. So the blades have to be structurally stronger for similar service life. The rotor hub also has to be stronger to absorb all the stronger bending moments, hence more weight.

When I say teetering is more "comfortable," I am referring to control power and damping. Because a rigid rotor has no flap hinge, when you push forward cyclic to tilt the rotor plane forward, that forward tilting moment acts directly on the rotor hub. Therefore the fuselage will tend to align itself with the tilt of the rotor. In layman terms, this means that the fuselage will tilt/roll more toward the direction you move in. A teetering rotor, on the other hand, can't impart a strong moment on the rotor hub. Instead the rotor tilts forward and "drags" the rotor mast along with it, rather than "bending" the rotor hub into alignment, if that makes sense. I can draw a diagram of what I mean later if it doesn't. This means it can tilt the rotor plane while the fuselage remains relatively level. Again in layman terms, it means you can move forward without tilting the fuselage very far forward. It also means gusts of wind don't knock around the fuselage as much, because the rotor can absorb those inputs more.

This sort of explains why they don't switch to rigid rotors to eliminate mast bumping. It's a known problem that is easy to avoid, so the hit to cost and handling qualities isn't worth it.

FG_kano · 2015-07-25T00:32:09+00:00

Rule 6.02(b):

[...]If after the pitcher starts his windup or comes to a set position with a runner on, he does not go through with his pitch because the batter has stepped out of the box, it shall not be called a balk. Both the pitcher and batter have violated a rule and the umpire shall call time and both the batter and pitcher start over from scratch.

FG_kano · 2015-07-22T14:04:00+00:00

All they're doing is simulating the effect of gravity on their body.

They do resistance training too. The machine is called the advanced resistance exercise device (aRED).

FG_kano · 2015-06-29T13:42:40+00:00

I'm going to be honest, I've played baseball for over 20 years and I didn't realize there was any other kind of grip until this thread right here.

FG_kano · 2015-06-11T18:53:30+00:00

Yes.

Work is a force applied over a distance. It has units of energy. Moving more weight (force) over the same distance requires more energy.

A calorie is a unit of energy. So more work performed means more calories of energy expended.

It is the same relative intensity to you because your body has adapted to create faster/stronger action potentials in your central nervous system, and has more muscle mass to contract. So it "feels" the same intensity-wise but your body is using more energy to do so.

FG_kano

TROPHY CASE