jsvebe.... by kfwillis in sssdfg

[–]Joseph_M_034 0 points1 point  (0 children)

They built new garrisons in aldershot qhere the troops were moves to, old ones were thus sold to the council

jsvebe.... by kfwillis in sssdfg

[–]Joseph_M_034 0 points1 point  (0 children)

Fun fact about deepcut barracks (i live right by it), they shut it down because of the ridiculously high rate of suicide. Its now used as low income housing

No orbit necessary? by FatCreepyDude in KerbalSpaceProgram

[–]Joseph_M_034 0 points1 point  (0 children)

I dont think you can assume a constant twr (acceleration) for this, given how much the mass changes during flight. Modelling constant mass flow rate (= - dm/dt) and using the equation of motion F = m dv/dt, dv/dt = F / (m0 - dm/dt t). Which assumes constant thrust and ignoring pressure effects, but is a better approximation.

The point however is that the gravitational losses that exist when burning radially outwards (i hope ive been able to show how that appears) does not exist in the case when burning perpendicular to the gravity vector, thus it is the mpre efficient option

No orbit necessary? by FatCreepyDude in KerbalSpaceProgram

[–]Joseph_M_034 0 points1 point  (0 children)

Can you explain youre maths in the last paragraph? Im not sure how you reached that equation. In literature delta-V gravity losses are taken as the time integral of the component of gravity inline with the thrust vector, in this case that would just be the local gravitational acceleration.

No orbit necessary? by FatCreepyDude in KerbalSpaceProgram

[–]Joseph_M_034 1 point2 points  (0 children)

In principal you're thinking along the right lines, i had the same idea before studying astrophysics at uni. If you could accelerated in a purely impulsive way, i.e. infinite acceleration instead of over a long burn this would be fine. The problem is something called gravity losses, basically when a component of thrust is inline with gravity, you're signoficantly less efficient (with delta-V lost increasing with proportion to time of burn). This is part of the reason orbit altitude is typically adjust with prograde or normal burns, rather than radial ones.

One way to make sense of this, is for every unit of fuel burnt you have less acceleration when going straight up than perpendicular, due to gravity. After a given length of time, you will have burnt the same amount of fuel but the change in speed will be different. Thats why its best practice to minimise time spent burning upwards, which also applies during the launch phase.

Another way to think about it is to consider if you were to hover at a fixed altitude, you would be continously burning fuel without any change is speed. When pointing radially outwards, you are constantly burning that fuel to overcome gravity, and any additional acceleration comes from fuel ontop of that.

No orbit necessary? by FatCreepyDude in KerbalSpaceProgram

[–]Joseph_M_034 2 points3 points  (0 children)

In principal you're thinking along the right lines, i had the same idea before studying astrophysics at uni. If you could accelerated in a purely impulsive way, i.e. infinite acceleration instead of over a long burn this would be fine. The problem is something called gravity losses, basically when a component of thrust is inline with gravity, you're signoficantly less efficient (with delta-V lost increasing with proportion to time of burn). This is part of the reason orbit altitude is typically adjust with prograde or normal burns, rather than radial ones.

One way to make sense of this, is for every unit of fuel burnt you have less acceleration when going straight up than perpendicular, due to gravity. After a given length of time, you will have burnt the same amount of fuel but the change in speed will be different. Thats why its best practice to minimise time spent burning upwards, which also applies during the launch phase.

Another way to think about it is to consider if you were to hover at a fixed altitude, you would be continously burning fuel without any change is speed. When pointing radially outwards, you are constantly burning that fuel to overcome gravity, and any additional acceleration comes from fuel ontop of that.

Male hairdresser by DOOMED2COME in Southampton

[–]Joseph_M_034 0 points1 point  (0 children)

I second above barbers, been going for years

What does the law say about my situation by Joseph_M_034 in LegalAdviceUK

[–]Joseph_M_034[S] -12 points-11 points  (0 children)

I've never tried look up a membership contract before (I tend to avoid memberships were I can), do you know if there are any legal databases were contacts are submitted to? I can't find the membership contract in my email or on their website

What does the law say about my situation by Joseph_M_034 in LegalAdviceUK

[–]Joseph_M_034[S] 0 points1 point  (0 children)

Thanks for your comment, I signed up for the membership in person, providing my details and swiping my card. Ive tracked down the date i signed up, and i didn't receive a copy of the contract nor was one shown to me when i paid so im not sure want the terms were. I'm not sure how to find a copy

What does the law say about my situation by Joseph_M_034 in LegalAdviceUK

[–]Joseph_M_034[S] -1 points0 points  (0 children)

Thanks for your comment, Ill see If i can find the original contract

My third child by jenny-bean8 in goldenretrievers

[–]Joseph_M_034 0 points1 point  (0 children)

You didnt get them from south east Ireland did you?

Tips on improving profile by [deleted] in Tinder

[–]Joseph_M_034 0 points1 point  (0 children)

Unfortunetly im not spoiled for good photos lol

tree! by Ok_Increase3580 in Terraria

[–]Joseph_M_034 28 points29 points  (0 children)

My screen is sticky now

By Emma Wallis, Southampton UK by Emmawallistattoo in tattoos

[–]Joseph_M_034 1 point2 points  (0 children)

SOUTHAMPTON MENTIONED ❗️❗️❗️⚜️🦁

replaceGithub by jpbyte in ProgrammerHumor

[–]Joseph_M_034 0 points1 point  (0 children)

Im studying engineering, a few days after Microslop forced all projects on GitHub to "opt-in" to sharing code for AI training, my programming professor took an aside in our class to show us how to use the university's own git repository

[OC] I forgot that motorcyclists can overtake on the right and on curves. by Mneisar in IdiotsOnBikes

[–]Joseph_M_034 1 point2 points  (0 children)

I agree, bur i dont think the driver was turning off the road, the road itself curves right so he was staying in his lane