Ok, went and re-read.
UNECE R44, while it is worded and, well, conceptualized differently than NA test standards, does have what I would consider a "rebound standard" for rear-facing seats.
That is, the standard, instead of dictating inches or cm from a point past which something may not travel, instead defines a series of planes, that describe a box around the child. This box changes in size in relation to the interior of the vehicle, which is why car seats sold to this standard must indicate if they are only intended for use in one specific vehicle, in several vehicles (with a list), in most vehicles (with a list, and descriptions of which types of vehicles are not suitable), or in all vehicles covered by the law. For rear-facing seats, one of the directions included in the box is toward the rear of the vehicle. It doesn't specify "during this phase of the crash, the dummy must not be here;" instead, it specifies "at all times during the crash or to a certain time after, or until the dummy comes to a complete stop, the dummy must not leave this box in any part." It also specifies that if there is an anti-rebound bar/device which is a removable part of the seat, it must pass the testing both with it on and removed. Further, the testing must be conducted from the front and the rear, and in the case of the front with the support leg, if there is one, in both the highest and lowest compatible positions, and in the rear-impact test it must be conducted with the support leg in what is determined to be the worst-case usage scenario.
Hopefully that helps. I couldn't find language of the Swedish Plus Test (formally T Standard) (probably because I'm searching in English, not Swedish ) but that is an optional test, while ALL restraints sold in Europe must pass UNECE R 44/04.
Incidentally, I haven't got a chance to read the new Canadian standard in full but I'd like to, if you have a link. Also, if anyone knows where I can read the latest Aussie standard I'd like to read that too.
UNECE R44, while it is worded and, well, conceptualized differently than NA test standards, does have what I would consider a "rebound standard" for rear-facing seats.
That is, the standard, instead of dictating inches or cm from a point past which something may not travel, instead defines a series of planes, that describe a box around the child. This box changes in size in relation to the interior of the vehicle, which is why car seats sold to this standard must indicate if they are only intended for use in one specific vehicle, in several vehicles (with a list), in most vehicles (with a list, and descriptions of which types of vehicles are not suitable), or in all vehicles covered by the law. For rear-facing seats, one of the directions included in the box is toward the rear of the vehicle. It doesn't specify "during this phase of the crash, the dummy must not be here;" instead, it specifies "at all times during the crash or to a certain time after, or until the dummy comes to a complete stop, the dummy must not leave this box in any part." It also specifies that if there is an anti-rebound bar/device which is a removable part of the seat, it must pass the testing both with it on and removed. Further, the testing must be conducted from the front and the rear, and in the case of the front with the support leg, if there is one, in both the highest and lowest compatible positions, and in the rear-impact test it must be conducted with the support leg in what is determined to be the worst-case usage scenario.
Hopefully that helps. I couldn't find language of the Swedish Plus Test (formally T Standard) (probably because I'm searching in English, not Swedish ) but that is an optional test, while ALL restraints sold in Europe must pass UNECE R 44/04.
Incidentally, I haven't got a chance to read the new Canadian standard in full but I'd like to, if you have a link. Also, if anyone knows where I can read the latest Aussie standard I'd like to read that too.