"Okay I talked about this in a post a few months ago and I finely have the answer. Taking facts from the only source I have, I re-watched all the terminator movies and in the making of T3 in the bathroom scenes they finely answered my question a T3 Movie Terminator weighs 2000 pounds, which fills in a lot of the issues I have had with the science behind the TV and Movie when two terminators fight buildings shake vans rocks back and forth and walls get destroyed, so Sarah could not have possibility have lifted Cameron into that chair when the trapped safe caused her to shut down and reboot. Most of the cars they drive around in wouldn’t carry her weight which goes to prove Cameron is an advanced proto-type, she is almost as strong as a terminator but with a lot less mass, I would guess Cameron weighs on the order of 500 pounds. I know it’s a TV show and I know the laws of Physics don’t apply to TV and Movies but it’s a pet peeve of mine when holly weird shifts gears mid stream on physics issues. I still want to know why Skynet would design a terminator that can not only eat but one that would look like a teen girl, I have a feeling if SCC gets a next season we will find out Skynet didn’t build her but John did, future john already knows the outcome because to him it has already happened, he is just filling in the blanks by sending back the right people and equipment at the right times. (Think Big John is a freak and he built himself a toy to play with then with the time portal he sent it to him self as a present) Cameron isn’t there to help john stop Skynet because that can’t happen she is there is give john the training and knowledge to become the leader he needs to be.

IMHO

"

"I agree with earlier estimates, in order to maintain a REASONABLE (taking evidence from the show into account, and general physics) she must weigh at LEAST 250 pounds, which is well within reason for not being spotted and still being able to move around."

"Okay I talked about this in a post a few months ago and I finely have the answer. Taking facts from the only source I have, I re-watched all the terminator movies and in the making of T3 in the bathroom scenes they finely answered my question a T3 Movie Terminator weighs 2000 pounds, which fills in a lot of the issues I have had with the science behind the TV and Movie when two terminators fight buildings shake vans rocks back and forth and walls get destroyed, so Sarah could not have possibility have lifted Cameron into that chair when the trapped safe caused her to shut down and reboot. Most of the cars they drive around in wouldn’t carry her weight which goes to prove Cameron is an advanced proto-type, she is almost as strong as a terminator but with a lot less mass, I would guess Cameron weighs on the order of 500 pounds. I know it’s a TV show and I know the laws of Physics don’t apply to TV and Movies but it’s a pet peeve of mine when holly weird shifts gears mid stream on physics issues. I still want to know why Skynet would design a terminator that can not only eat but one that would look like a teen girl, I have a feeling if SCC gets a next season we will find out Skynet didn’t build her but John did, future john already knows the outcome because to him it has already happened, he is just filling in the blanks by sending back the right people and equipment at the right times. (Think Big John is a freak and he built himself a toy to play with then with the time portal he sent it to him self as a present) Cameron isn’t there to help john stop Skynet because that can’t happen she is there is give john the training and knowledge to become the leader he needs to be.

IMHO

"

"I'm not really sure how they figure Arnold would have weighed a ton in T3. That's just ridiculous. Floors would crack under his feet. He wouldn't be able to sit in a car or operate a motorcycle.

In the show, Cameron is made from coltan. In real life, coltan is used for making things like electronics capacitors. So it's use in the show is purely fictional in that they simply borrowed the name to make it sound like some futuristic metal alloy. So it can be whatever it wants. I would think lightweight would be a characteristic."

"I don't buy it! For 2027, I seriously dubt that the density of metals will change."

"Here is a very informative video about coltan, and how it being found naturally in a part of Africa has caused distatrous results. Africa was mentioned by Weaver in the last episode.
Congo’s Bloody Coltan
http://www.sfbayview.com/2008/in-focus-congos-bloody-coltan/

I have a longer post where I mention that coltan is actually a ore that when used in the terminators endosekeleton is actually refined in to titanium to give that metal stronger heat properties. "

"Here is a very informative video about coltan, and how it being found naturally in a part of Africa has caused distatrous results. Africa was mentioned by Weaver in the last episode.
Congo’s Bloody Coltan
http://www.sfbayview.com/2008/in-focus-congos-bloody-coltan/

I have a longer post where I mention that coltan is actually a ore that when used in the terminators endosekeleton is actually refined in to titanium to give that metal stronger heat properties. "

"T888 and Cameron endos aren't made purely out of tantalum-nobium, tantalum and niobium are additives blended with titanium and aluminum in intermetallic form (the real life equivalent of a hyperalloy) to give the endos greater strength and a higher melting point.

Terminators sink rather than float because of bouyancy, not weight issues. And yes, Terminators are a bit heavier than a human of the same size, but not ridiculously so. A 600 lb. terminator would be a very poor infiltrator-- we joked in the writers' room that you could simply dig pits with breakaway flooring in front of every resistance bunker as a foolproof way to foil them.

Of course, a 'roided out bodybuilder hiding among skinny, starving refugees isn't a great infiltrator, either, but that's a whole other subject. :)"

"Terminators can breath. Remember in Terminator 1, Kyle Reese says they can have "bad breath." So, I wouldn't discount their ability to breath just yet.

You can still swim with your lungs not completely inflated. But regardless, that wouldn't make a difference for a Terminator. Weight does not matter, never said it did, density does. Two things can keep you afloat in water, one is buoyancy, the other is a density less than water (they're intertwined). Pudgy people float better than muscle bound people, because fat ~1 g/mL, muscle is like 3x that.

You are right, a ship weighs much more, but due to water displacement, and the buoyancy effect, it's mass is less than of the water it displaces. So, in a way, when it's upright, it's less dense than water - not the case for a Termi."