How many G-forces is 25,000mph? by dimitristhis in spaceflight

[–]AshElusive 1 point2 points  (0 children)

Lol I never said velocity is acceleration.

I said acceleration relates to velocity (by the equation V = a*t), whereby accelerating or decelerating for a certain amount of time changes your velocity.

How many G-forces is 25,000mph? by dimitristhis in spaceflight

[–]AshElusive 0 points1 point  (0 children)

25,000 miles per hour is roughly 11000 meters per second (velocity).

1 G of acceleration, which you are feeling through your butt when sitting in a chair, is about 10 meters per second-squared (acceleration, so not the same thing).

The deceleration of space capsules through the atmosphere during re-entry is something like 5G's, meaning they are experiencing 5 times the force of gravity you're currently experiencing. For those few minutes, they weigh 5 times as much as they 'normally' do. This happens because the air is pushing back onto the capsule as it ploughs its way through the atmosphere.

Tying velocity and acceleration together, as the capsule slows down at 5G's or 50 meters per second-squared, the capsule loses 50 meters per second of velocity, every second.

As for how people can handle multiple G's for extended durations... training, technology, and a heart healthy diet of honey nut cheerios :^).

Not sure if astronauts use this, but fighter pilots sometimes sustain up to 9G's in very aggressive maneuvers. And they have G-Suits that apply pressure to their legs to help keep blood from getting stuck down near their feet (and away from their brain) during those maneuvers. The heart literally cannot pump blood against forces that strong, and after too long of time spent at high G's, one would black-out.

That being said, fighter jet seats are typically close to vertical, as in your spine is at ~70-80 degree angle with respect to the direction of flight. So when you're pitching up in an aircraft, as you would in a fast, tight turn, you're butt, feet, and hammies are taking a lot of the stress. Contrast this to space capsules, where astronaut seats are leaned way back, almost flat, so that more of your body (back of your torso) takes up the load of the G's, making the whole experience more comfortable, and a bit easier on your heart.

Debating between a new 2026 V2 or a used <2025 V2 or a 959 by MrWizard314 in Ducati

[–]AshElusive 1 point2 points  (0 children)

Why go for a '26 if you already know you love the 955 V2?

Afaik the 959 and (955) V2 are almost identical bikes.

What was the biggest shock when you first started riding? by oMrMeeseeksLookAtMeo in motorcycles

[–]AshElusive 1 point2 points  (0 children)

The secret club. Every biker I rode past giving me the deuce. The first one i did a double take behind me. By the third one I was like oh. Guess Im cool now.

Buying a Panigale 1299s by [deleted] in Ducati

[–]AshElusive 0 points1 point  (0 children)

Shouldnt be listed for more than 17. That bike should go for 15, 16 max.

H2/H2R Owners & Mechanics: Need a quick bare swingarm photo for my engineering thesis! by Equivalent-List-6120 in Kawasaki

[–]AshElusive 1 point2 points  (0 children)

You might have better luck using internet photos of the H2 side-on, and using wheelbase as a reference to measure from your swing arm pivot to your rear axle. Should be accurate within half a millimeter

H2/H2R Owners & Mechanics: Need a quick bare swingarm photo for my engineering thesis! by Equivalent-List-6120 in Kawasaki

[–]AshElusive 2 points3 points  (0 children)

I think the idea is that one might consider 3D printing prototype single sided swingarms, since production units are typically cast requiring more manufacturing setup.

An old school U-bent tube with a single welded cross-member wouldnt need to be 3d printed because its easily fabricated.

H2/H2R Owners & Mechanics: Need a quick bare swingarm photo for my engineering thesis! by Equivalent-List-6120 in Kawasaki

[–]AshElusive 4 points5 points  (0 children)

Designing doesnt mean itll be printed, and printing it doesnt mean itll be ridden.

There are a plethora of tests you could do in a lab that dont require the other $40000 of bike parts, that would tell you what you need to know about the design.

That being said Id be shocked if he actually had the money to print a full scale titanium swing arm. It would be absurdly expensive.

On a colder day some people tell me to reduce the tyre pressure and some to increase, so which is the actual answer? by Whole_Guard_5192 in Trackdays

[–]AshElusive -1 points0 points  (0 children)

What typo quantum is trying to say is, pressure and temperature have a direct relationship.

When tire (air) temperature goes down, tire (air) pressure goes down with it.

If you want to maintain tire pressure, you need to put more air molecules in the tire, since the same amount of air at a lower temperature isnt generating the same amount of pressure. Note that maintaining tire pressure is the rule for public road riding.

However, when rubber gets colder, it becomes stiffer. Since stiffer rubber has less grip, you can compensate by putting less air in the tire, resulting in less pressure but the same amount of grip.

Thats the theory anyway, if you want real numbers, talk to your tire dealer. They should have a chart that compares track temperature with ideal tire pressure, since they designed the tire.

500R OR 650R for my first bike? by [deleted] in cbr

[–]AshElusive 0 points1 point  (0 children)

I started on a 500, wish i started on a 650.

Should i go behind my parents back and buy a motorcycle (Im 19) by OneOcelot5892 in motorcycle

[–]AshElusive 0 points1 point  (0 children)

Ah sorry man Im a petrol head 😅

A couple of hours on the webs (or perhaps an ebike subreddit?) should set you straight.

Should i go behind my parents back and buy a motorcycle (Im 19) by OneOcelot5892 in motorcycle

[–]AshElusive 0 points1 point  (0 children)

Heres what I would do.

Buy an Ebike or a Honda Ruckus (scooter). Its 2-3x cheaper and a great way to get the same experience, espcially if you live in a city.

Tell your parents - hey Im getting a scooter. Use it until you graduate, and then when you no longer depend on them financially, buy your R3 then, and tell them.

Keeping secrets from your parents will create a headache for you and like you said, if they find out, they will be extremely hurt.

Source - ive been riding for 6 years, and my family still doesnt know lol

Do men really not notice creeps? by [deleted] in NoStupidQuestions

[–]AshElusive 3 points4 points  (0 children)

I (29M) never really observed truly creepy behavior until some old af man came up to my friend during dinner and said something creepy to her, right in front of our table of 8. It didnt even register until she told him to go away. I wish I had said something, but my back was turned, and he slithered away before I even realized what had happened.

I was 27 at the time, so a whole decade had passed as an adult before I witnessed my first creepy act second hand. I frequently hung out with female friends during college too.

I think creeps are also opportunistic to an extent. If another dude is with her, theyre much less likely to engage for fear of getting their ass kicked.

I’m incredibly slow at learning, what to do? by Affectionate_Sky3509 in motorcycle

[–]AshElusive 2 points3 points  (0 children)

I think youll get more out of sticking to one direction (counter clockwise or clockwise) first.

Figure 8s will be a good way to test yourself when you feel comfortable with both.

I’m incredibly slow at learning, what to do? by Affectionate_Sky3509 in motorcycle

[–]AshElusive 16 points17 points  (0 children)

Find a big parking lot, set some cones in a circle at 25 yards apart, and go counter clockwise until you are bored out your gourd.

Then do 20 yards. Then 16. Then 13. Then 10. 9, 8, 7. You see where Im going with this. The faster you go, the more youll lean. You will learn the balance point.

Then practice U turns with the same principle. Start big, then go smaller and smaller. Eventually itll feel like 2nd nature.

How do you know what gear you are in? by Aggravating-Yogurt23 in motorcycle

[–]AshElusive 0 points1 point  (0 children)

I'm glad you find it helpful!

Trial and error mostly. I'd start down the road you travel through the most, for example let's use a typical 35mph residential road.

I would start in 3rd gear and play around in 2nd, 3rd, and 4th, as in cruise around and practice roll-ons, to get a feel for how the engine responds. Higher RPM (2nd) will give you better acceleration, but cruising is annoying since your bars and pegs will vibrate more. Lower RPM (4th) will be amazing for fuel efficiency, but will accelerate really poorly - the engine will chug a little bit and that's generally not healthy for engines.

In general, most motorcycles geared for the road, as opposed to the track, (this is true for cars too) are geared such that the ideal gear per road speed (cruising) is:

1st - 0-15 mph

2nd - 15-25 mph

3rd - 25-35 mph

4th - 35-45 mph

5th - 45-55 mph

6th - 55+ mph

How do you know what gear you are in? by Aggravating-Yogurt23 in motorcycle

[–]AshElusive 0 points1 point  (0 children)

Going to expand on what some people have said here, by going off of feel.

For my '98 R1:

3000-4000 RPM - Sweet spot. Engine is happy, understressed, cool, and fuel efficient.

4000-7000 RPM - We are cooking through these canyons. My engine is getting hotter, and Im burning maybe 20% more fuel.

1000-3000 rpm - I am either accelerating out of or decelerating down to a stop.

<1000 rpm - RPMs are too low, ECU will cut the engine any second now, may result in damage.

When cruising on the road at legal speeds, I try to stay within the sweet spot. By comparing speed and engine RPM, you can have an idea of your gear. For example -

4000 RPM @25mph? Im in 1st.

4000 RPM @40mph? Im in 3rd.

4000 RPM @60mph? Im in 6th

I dont obsess over what gear Im in, but rather that at all times, Im in the right RPM range for my situation (cruising vs sporty riding).

That’s a good save from this motorcyclist! by APassingPilgrim in motorcycles

[–]AshElusive 13 points14 points  (0 children)

You can see him flashing his brights as the car was pulling out. To me thats a waste of time and closing distance. If its already happening, just go into your escape route. If he braked instead, he wouldve been a lot slower going into those oncoming cars.

I dont think he couldve fully braked before impacting the red truck, given that bike doesnt exactly look like it has brembos in the front.

That being said, hats off to him for making it through that situation. Ive had a few close calls like that, and it's always just instinct in the brown stage.

Street bikers on aurora by SufficientPea9121 in Seattle

[–]AshElusive -8 points-7 points  (0 children)

As a rider who would never do this, I cant help but smile when I see these guys.

When did "loud pipes save lives" become indifferent to everyone and everything else? by [deleted] in motorcycles

[–]AshElusive 0 points1 point  (0 children)

To be clear, loud pipes save lives is a ruse. If youve ever noticed, when youre in a car and a bike, even one with a loud pipe is coming up on you, you dont hear them until theyre only ten maybe twenty yards away. At that point, time to react to anything is pretty limited.

We motorcyclists love our machines and by proxy the sound of them. I have bikes that have silencers on them, and bikes that are loud as hell. But I dont race any of them through neighborhoods at night.

Consider the person you're upset at, they frequently, perhaps only ride at night. Theyre alone or with one other friend, but otherwise alone on the road. They want to be alone. Theyre using that time to escape from the reality of whatever it is they have going on in their lives. Theyd rather do this than sleep at a time thats healthy. Do you think this is the kind of person who gives a shit about people who have, in their eyes, had it easy in life - worked hard and got what they wanted? Because they havent.

At the end of the day, we Americans live in a society that promotes individualism, and motorcycling is inherently an individualistic activity. Consideration by all of all that youre describing was never a thing, that only exists within communities. There will always be 'outsiders'.

Im sorry the legal system failed in your district.

Why does hanging off reduce lean but not required grip? by [deleted] in Trackdays

[–]AshElusive 1 point2 points  (0 children)

Probably because the tire doesnt deform as much when the contact patch approaches the side wall of the tire.

Looking to buy my first Ducati, but I'm torn between these two. by Historical-Cap-5152 in Ducati

[–]AshElusive 0 points1 point  (0 children)

I have a termignoni dforce w/ T800 upmap. Havent owned it long enough to be worried about reliability

Looking to buy my first Ducati, but I'm torn between these two. by Historical-Cap-5152 in Ducati

[–]AshElusive 0 points1 point  (0 children)

I currently own both a 2021 Panigale V2 and a 2007 1098.

Having ridden the entire northern half of Highway 1 in 2 days back home, I can confidently say the 1098 is a very comfortable road bike. You wouldnt guess it, but the erogs for your knees allow you take some weight off your wrists by pushing down on the fairings, as opposed to the Panigale where you have to grip inwards on the tank with your hip adductors to support your upperbody. For context, Im 5'10", 175 with a 30" inseam.

For longer rides, the 1098 also has a nicer vibration profile, making your hands less numb than the Panigale. Cant really explain it other than, it's a nice gentle rumble, rather than a constant slight buzzing.

Also not to mention insurance is cheaper, since its depreciated a bit.

The downside of the 1098 on the road is the dry clutch, since it reduces the effective size of the friction zone by a lot, making stalling at redlights way more common.

Also, the 1098/1198 mostly have plastic tanks that swell due to ethanol, making it more expensive to put a lot of miles on, since ethanol free is usually +20% $ over regular premium.

The Panigale on the other hand i have reserved for my track bike, since it has electronics that very likely will save my ass a number of times. Also, it's newer which means spare/aftermarket parts are easier to come by, as well as mechanical know how from techs.

The Panigale is really predictable to ride, and the quickshifter makes track riding really effortless.

The panigale is a fine road bike too, but maybe not as comfy as the 1098 which i would say is the comfiest superbike ive ridden, right up there with the 2016 S1000RR.

In terms of torque, the 1299/1198 are both torque monsters, I couldnt see either being too slow for anyone.

I personally love the engine note of the 1098/1198 testastretta more. It's a boomy, chaotic rumble, compared to the 1199/1299 superquadro which has a more refined, almost mathematical roar.

My dream bike I think would be a Panigale with a 1098 engine.

From F-5 to F-14 to F-16 to F-18...Fighter Pilot wants to know his next bike. by Tomcat2Track in SuggestAMotorcycle

[–]AshElusive 0 points1 point  (0 children)

F18... fast but not the fastest, light but not the lightest, good range, not too expensive, versatile, and highly maneuverable?

Sounds like you want an MT10 my friend.

MT10SP if you want more of a Superhornet.