I was looking at the Raptor and noticed the white looking tubes underneath the canopy. Do the tubes have a purpose? If so what is the purpose/function of the tubes? Are there any other aircraft with this kind function? Thanks.
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Speculating: this could be part of the canopy locking assembly, likely in addition to the six grey points you can see along the middle rim of the canopy. – Jules Nov 02 '22 at 03:28
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5Chemtrail storage containers – Richard Nov 02 '22 at 20:26
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1@Richard clearly its plastic downpipe from rainwater spouting, being used as air ducting so the incoming breeze is redirected at the windscreen to keep it defrosted.... – Criggie Nov 03 '22 at 08:52
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3"Do the tubes have a purpose?" While I'm not an airplane designer, I'd bet everything on a (modern fighter) plane has a purpose - otherwise it would be removed to reduce weight. – zovits Nov 03 '22 at 12:08
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Those are Cartridge Actuation Devices (CADs) - pyrotechnic charges used during canopy separation for canopy jettison or ejection. Note the nozzles at the outboard ends and the ignition wires inboard.
You can see a ground test of a similar unit installed on an F-16 below.
Romeo_4808N
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1What is that person doing there? Looks like they are holding something, a microphone or other sensor perhaps. Surely, given there are two rockets firing and in a few moments a canopy falling from the sky, they could have set up a tripod or something. – user Nov 02 '22 at 12:05
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3It might be the guy who pulled the cable triggering the pyrotechnic cartridges (?) – sophit Nov 02 '22 at 12:31
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6Looks like they're following the instructions on the side of most fighters, 1. Push button to open door 2. Pull ring/handle out X feet to jettison canopy. I feel like I'd want to tie on a longer rope and stand farther back if it's not an emergency, but maybe there's some reason they can't. – CameronSS Nov 02 '22 at 14:05
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He's wearing a hard hat, and what looks like some sort of protective suit (hard to tell from this low-res image, but it looks like a fireman's coat, designed for protection in burning buildings and the like). He's probably fine. Probably. – Darrel Hoffman Nov 02 '22 at 14:52
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7@CarloFelicione from other photos in this sequence, and a video of what looks like the same test, it's a person yanking the cord. A lot more nonchalant about the canopy flying overhead than I'd be. – CameronSS Nov 02 '22 at 16:16
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