Question Q/A's about ISS - Page 5 - Orbiter-Forum

ryan · 07-10-2009, 08:39 AM

Has anybody been watching footage from the ISS and noticed that all the astronauts have socks on, is this for comfort reason or just becuase the amount of materials around they dont want to hard the material or the astronaut. I've noticed this in some Shuttle footage too.
Thanks.
Ryan.

**tblaxland** · 07-10-2009, 09:56 PM

Quote:

Originally Posted by ryan

Has anybody been watching footage from the ISS and noticed that all the astronauts have socks on, is this for comfort reason or just becuase the amount of materials around they dont want to hard the material or the astronaut. I've noticed this in some Shuttle footage too.

Can you think of any advantages of wearing boots? I see no advantages, so why fly them given the extra mass they would take? Or were you thinking barefoot? If so, personally, I think my feet would get cold, especially with no gravity to pull the blood down there.

**MJR** · 07-10-2009, 10:05 PM

Not only that but it would be uncomfortable.

Fixerger · 08-16-2009, 03:13 PM

>After the docking, the station was reoriented as planned to minimize the risk of micrometeoroid/debris impacts upon the Shuttle (-XVV = -x-axis in velocity vector, +z-axis in local vertical)

Can someone explaine how to do this???

**tblaxland** · 08-16-2009, 11:48 PM

Quote:

Originally Posted by Fixerger

Can someone explaine how to do this???

In Orbiter? I would use Attitude MFD. Switch to Velocity mode and set a Pitch of 180°. Depending on which version of the ISS you are using you will also need to set a Roll of either 90° or 180°.

Fixerger · 08-17-2009, 02:37 PM

Thanks!

Ark · 08-17-2009, 05:13 PM

What's the weight/volume limit for personal effects? Could I take a Les Paul and a small amplifier up with me?

**Urwumpe** · 08-17-2009, 05:41 PM

Quote:

Originally Posted by Ark

What's the weight/volume limit for personal effects? Could I take a Les Paul and a small amplifier up with me?

No, each would be too heavy - also you should remember that there is not unlimited electrical power on the ISS. I remember Thomas Reiter was allowed to take only pictures in digital form and replacement strings for an acoustic guitar with him, that is a good maximum reference - the acoustic guitar is "standard equipment" on the ISS.

I don't know the exact mass limits, but you are only allowed to take very few personal things with you.

**Orbinaut Pete** · 08-17-2009, 10:05 PM

Quote:

Originally Posted by Ark

What's the weight/volume limit for personal effects?

Each Space Shuttle astronaut is allowed to take one Personal Preference Kit (PPK) with them into space.

The contents of a PPK must be limited to 20 separate items.
The total weight of a PPK must not exceed 0.682 kilograms (1.5 pounds).
The volume of a PPK must be contained in a 12.82cm x 20.51cm x 5.13cm bag provided by NASA.

ijuin · 08-18-2009, 06:36 AM

1.5 pounds (under 700 grams) seems kind of light given that most astronauts will consume at least three kilograms of food and water per day, meaning that skipping a single meal would free up enough mass budget to double that personal allowance.

**tblaxland** · 08-18-2009, 11:50 PM

Quote:

Originally Posted by ijuin

skipping a single meal would free up enough mass budget to double that personal allowance.

Your meals are packed for you anyway, so you would not have the option of leaving one on the ground. I doubt you would want to anyway - when you are working 14 hour days, few things are more important than a meal.

ijuin · 08-19-2009, 08:06 AM

Well, more my point is that the personal allowance is insignificant compared to the mass of everything else that the astronauts are carrying--if mass budgets were so tight that a crewmember could not carry a single extra kilogram of stuff, then they would ALSO be so tight that a crewmember could be kicked off the mission for having one kilogram too much body fat.

**garyw** · 08-19-2009, 09:18 AM

Quote:

Originally Posted by ijuin

Well, more my point is that the personal allowance is insignificant compared to the mass of everything else that the astronauts are carrying--if mass budgets were so tight that a crewmember could not carry a single extra kilogram of stuff, then they would ALSO be so tight that a crewmember could be kicked off the mission for having one kilogram too much body fat.

Wrong. The PPK is your PERSONAL preference kit. Things like music, CD players, ipods, etc are either already on the ISS or not included into the PPK.

Most astronauts take family trinkets or other personal effects just so they can say they have flown in space.

PPK limits are very closey enforced as it's a perk of spaceflight and nothing at all to do with the sort of "personal" items you'd pack for a road, rail or air trip.

ijuin · 08-19-2009, 09:26 AM

Ah, I was more of the impression that the PPK was the entirety of the non-assigned items that a crewmember would have (e.g. extra books or software disks or clothing), which would have made it more comparable to the personal gear allowance given to military personnel (remember you have to fit it all in your duffel bags).

**Urwumpe** · 08-19-2009, 09:30 AM

Also: The limits for the PPK have also a serious political background - the Apollo 15 Stamp scandal.

07-10-2009, 08:39 AM	#61
ryan That guy	Socks Has anybody been watching footage from the ISS and noticed that all the astronauts have socks on, is this for comfort reason or just becuase the amount of materials around they dont want to hard the material or the astronaut. I've noticed this in some Shuttle footage too. Thanks. Ryan.

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07-10-2009, 09:56 PM	#62
tblaxland Webmaster	Quote: Originally Posted by ryan Has anybody been watching footage from the ISS and noticed that all the astronauts have socks on, is this for comfort reason or just becuase the amount of materials around they dont want to hard the material or the astronaut. I've noticed this in some Shuttle footage too. Can you think of any advantages of wearing boots? I see no advantages, so why fly them given the extra mass they would take? Or were you thinking barefoot? If so, personally, I think my feet would get cold, especially with no gravity to pull the blood down there.

07-10-2009, 10:05 PM	#63
MJR C++ developer in the mix	Not only that but it would be uncomfortable.

08-16-2009, 03:13 PM	#64
Fixerger Orbinaut	>After the docking, the station was reoriented as planned to minimize the risk of micrometeoroid/debris impacts upon the Shuttle (-XVV = -x-axis in velocity vector, +z-axis in local vertical) Can someone explaine how to do this???

08-16-2009, 11:48 PM	#65
tblaxland Webmaster	Quote: Originally Posted by Fixerger Can someone explaine how to do this??? In Orbiter? I would use Attitude MFD. Switch to Velocity mode and set a Pitch of 180°. Depending on which version of the ISS you are using you will also need to set a Roll of either 90° or 180°.

08-17-2009, 05:13 PM	#67
Ark Orbinaut	What's the weight/volume limit for personal effects? Could I take a Les Paul and a small amplifier up with me?

08-17-2009, 05:41 PM	#68
Urwumpe Donator	Quote: Originally Posted by Ark What's the weight/volume limit for personal effects? Could I take a Les Paul and a small amplifier up with me? No, each would be too heavy - also you should remember that there is not unlimited electrical power on the ISS. I remember Thomas Reiter was allowed to take only pictures in digital form and replacement strings for an acoustic guitar with him, that is a good maximum reference - the acoustic guitar is "standard equipment" on the ISS. I don't know the exact mass limits, but you are only allowed to take very few personal things with you.

08-17-2009, 10:05 PM	#69
Orbinaut Pete ISSU Project Manager	Quote: Originally Posted by Ark What's the weight/volume limit for personal effects? Each Space Shuttle astronaut is allowed to take one Personal Preference Kit (PPK) with them into space. The contents of a PPK must be limited to 20 separate items. The total weight of a PPK must not exceed 0.682 kilograms (1.5 pounds). The volume of a PPK must be contained in a 12.82cm x 20.51cm x 5.13cm bag provided by NASA.

08-18-2009, 06:36 AM	#70
ijuin Orbinaut	1.5 pounds (under 700 grams) seems kind of light given that most astronauts will consume at least three kilograms of food and water per day, meaning that skipping a single meal would free up enough mass budget to double that personal allowance.

08-18-2009, 11:50 PM	#71
tblaxland Webmaster	Quote: Originally Posted by ijuin skipping a single meal would free up enough mass budget to double that personal allowance. Your meals are packed for you anyway, so you would not have the option of leaving one on the ground. I doubt you would want to anyway - when you are working 14 hour days, few things are more important than a meal.

08-19-2009, 08:06 AM	#72
ijuin Orbinaut	Well, more my point is that the personal allowance is insignificant compared to the mass of everything else that the astronauts are carrying--if mass budgets were so tight that a crewmember could not carry a single extra kilogram of stuff, then they would ALSO be so tight that a crewmember could be kicked off the mission for having one kilogram too much body fat.

08-19-2009, 09:18 AM	#73
garyw O-F Administrator	Quote: Originally Posted by ijuin Well, more my point is that the personal allowance is insignificant compared to the mass of everything else that the astronauts are carrying--if mass budgets were so tight that a crewmember could not carry a single extra kilogram of stuff, then they would ALSO be so tight that a crewmember could be kicked off the mission for having one kilogram too much body fat. Wrong. The PPK is your PERSONAL preference kit. Things like music, CD players, ipods, etc are either already on the ISS or not included into the PPK. Most astronauts take family trinkets or other personal effects just so they can say they have flown in space. PPK limits are very closey enforced as it's a perk of spaceflight and nothing at all to do with the sort of "personal" items you'd pack for a road, rail or air trip.

08-19-2009, 09:26 AM	#74
ijuin Orbinaut	Ah, I was more of the impression that the PPK was the entirety of the non-assigned items that a crewmember would have (e.g. extra books or software disks or clothing), which would have made it more comparable to the personal gear allowance given to military personnel (remember you have to fit it all in your duffel bags).

08-19-2009, 09:30 AM	#75
Urwumpe Donator	Also: The limits for the PPK have also a serious political background - the Apollo 15 Stamp scandal.