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Hey - Why do P-51 mustangs whistle?
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Oct 18, 2012 14:52
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Because you touch yourself at night. Actually I think it is the guns that cause it.
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Oct 18, 2012 14:54
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SwimNurd posted:Because you touch yourself at night. I thought that's what made DC-10s crash? SwimNurd posted:Actually I think it is the guns that cause it. Yup, at higher speeds (dives and pullouts) the gunports catch enough air to make the characteristic whistle. I think if the ports are empty (no gun/replica barrel) then it is even more pronounced.
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Oct 18, 2012 15:04
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Captain Apollo posted:Hey - Why do P-51 mustangs whistle? This came up several pages ago. No one knows. The two leading theories are the inboard gun ports and the doghouse. I'm more in favor of the latter because Mustangs at Reno (like PM) whistle and have no gun ports. Other ideas that often come up but are less sound (ha) are the NACA port and the supercharger.
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Oct 18, 2012 15:08
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They whistle because they're happy. They're happy because they're Mustangs.
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Oct 18, 2012 15:35
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I thought Mustangs Whinny, not Whistle!
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Oct 18, 2012 15:54
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otaku69 posted:don't get your hopes up to much http://bangshift.com/blog/rustbucket-tulsa-plymouth-currently-resides-in-jersey.html The engines and other steel hardware might be toast but the airframes should be okay. Aluminum oxide is a much more effective passivation layer than rust. Edit: So a little research reveals that aircraft alloys typically have low corrosion resistance and require coating, but surely they must be more robust than the typical vehicle frame. Perhaps just wishful thinking. dayman fucked around with this message at 20:41 on Oct 18, 2012 |
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Oct 18, 2012 20:31
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dayman posted:The engines and other steel hardware might be toast but the airframes should be okay. Aluminum oxide is a much more effective passivation layer than rust. I'm going to generalize a bit here, but most aircraft structures are built from clad aluminum alloy. The cladding is pure aluminum, forming a sacrificial oxide coating. It's great, as long as there are no surface imperfections, and as long as we're talking about an infinitely large flat sheet. The moment it has edges, holes, or any other material poked through it (bolts, rivets, etc,) aluminum alloy becomes incredibly corrosion-prone. Buried, in the godamned tropics? I'm not holding my breath. I'd love to see pictures that prove me wrong, though. Best of luck to them.
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Oct 18, 2012 21:20
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Blistex posted:I thought that's what made DC-10s crash? The DC-10 crashes because it is a DC-10 and the thought of that is enough to make any aircraft plow into a farm field.
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Oct 18, 2012 23:58
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Polymerized Cum posted:The DC-10 crashes because it is a DC-10 and the thought of that is enough to make any aircraft plow into a farm field. Hey now, stop hating on the DC-10... It's the only commercial aircraft I have any time on! Also, I'm going on one once Hajj stops. Regardless, off to Datangshan today. Stand by for photos of Migs and Shenyangs parked right next to each other so that no one is sure which is which.
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Oct 19, 2012 01:20
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Polymerized Cum posted:The DC-10 crashes because it is a DC-10 and the thought of that is enough to make any aircraft plow into a farm field. The first plane I ever flew on was a DC-10. It was 1990, it had ashtrays, and it smelled like cigarettes.
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Oct 19, 2012 01:46
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VikingSkull posted:The first plane I ever flew on was a DC-10. It was 1990, it had ashtrays, and it smelled like cigarettes. I got to ride on a KC-10...fortunately, no cigarettes.
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Oct 19, 2012 02:02
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Haters gonna hate
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Oct 19, 2012 02:18
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So Red Flag is going on here up in Alaska. It's pretty cool what with all the international players and poo poo. It's like that scene in ID4 of all the nation's coming together to take down the alien ships. Anyway, I AWAC'ed yesterday. Usually the airspace that is chopped out to us runs concurrent with aerial refueling tracks or the orbits of bombers. Earlier this year we shared some airspace with a B-52 which would get within 5-10 miles of us during the closest points of our orbits. Pretty eerie-looking aircraft to see flying. Just the proportions of it make it look spooky at high altitude. Well yesterday I didn't get a repeat of that but got to see a four-ship of F'15's take gas from a KC-135 with a four-ship of F-16's moving in immediately after the Eagles topped off. Here are the photos!  F-16's are kinda hard to see but they're contrailing a bit in the back of the larger, clearer formation up front  Money shot right here. 
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Oct 19, 2012 03:12
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PainterofCrap posted:Haters gonna hate That's not a DC-10 
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Oct 19, 2012 03:19
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This is pretty wtf (warning, possibly graphic and Jihadtards). Posted over at Jalaopnik earlier, I'm not sure how long it'll last on YouTube before somebody gets offended and pulls it. I thought poo poo like this only happened in Hollywood https://www.youtube.com/watch?v=bTmRZn98XxI&t=16s
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Oct 19, 2012 06:57
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McDeth posted:This is pretty wtf (warning, possibly graphic and Jihadtards). Posted over at Jalaopnik earlier, I'm not sure how long it'll last on YouTube before somebody gets offended and pulls it. I thought poo poo like this only happened in Hollywood Syrian helicopter shot down by rebels is the story Google brings up on this - unconfirmed.
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Oct 19, 2012 08:13
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MrChips posted:I'm certainly interested to see what they've come up with. At the expense of sounding like one of the screeching teenagers from Airliners.net, I've thought for a while that American Airlines' current livery is pretty dated looking, and not in a good way. AA painted their A300 fleet.
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Oct 19, 2012 12:56
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McDeth posted:This is pretty wtf (warning, possibly graphic and Jihadtards). Posted over at Jalaopnik earlier, I'm not sure how long it'll last on YouTube before somebody gets offended and pulls it. I thought poo poo like this only happened in Hollywood I loved the cover story on that. The government's story said the helicopter collided with a civilian airliner, then flew back to base. The airliner crashed and killed everyone on board.
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Oct 19, 2012 13:59
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McDeth posted:This is pretty wtf (warning, possibly graphic and Jihadtards). Posted over at Jalaopnik earlier, I'm not sure how long it'll last on YouTube before somebody gets offended and pulls it. I thought poo poo like this only happened in Hollywood
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Oct 19, 2012 14:51
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MrYenko posted:I'm going to generalize a bit here, but most aircraft structures are built from clad aluminum alloy. The cladding is pure aluminum, forming a sacrificial oxide coating. It's great, as long as there are no surface imperfections, and as long as we're talking about an infinitely large flat sheet. The moment it has edges, holes, or any other material poked through it (bolts, rivets, etc,) aluminum alloy becomes incredibly corrosion-prone. You would think they would clad the pieces after they have been drilled for bolt holes. Aluminum oxide is corundum, also known as sapphire which is second only to diamond on the Mohr scale in hardness. It's also an excellent electrical insulator so you shouldn't see corrosion from dissimilar metals. I would think the planes should be stable IF they did not get submerged. Like you said, hoping for no water infiltration in a place like Burma is probably just wishful thinking.
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Oct 19, 2012 15:01
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Pretty cool, a Air Canada 777 got a little SAR action near Australia. Maybe it's just stereotypes/my experience talking, but I feel like an American carrier would have either said no, not had enough fuel, or helped out and then promptly handed out reprimands to the entire crew of the plane.
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Oct 19, 2012 15:23
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dayman posted:You would think they would clad the pieces after they have been drilled for bolt holes. Aluminum oxide is corundum, also known as sapphire which is second only to diamond on the Mohr scale in hardness. It's also an excellent electrical insulator so you shouldn't see corrosion from dissimilar metals. In the center of this image, you can see the results of uncontrolled intragranular (exfoliation) corrosion, around the two rivet shop-heads.  I'd put dollars on this stemming from moisture getting between the rivet shank(s) and the stringer, either from age and stress widening the holes, or because the rivets were improperly bucked in the first place. Airplanes corrode, just from ambient humidity, sitting on the ramp. It's only frequent, detailed inspections that keep them from failing in flight. This is also why they get sent to the desert for storage.
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Oct 19, 2012 18:38
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MrYenko posted:In the center of this image, you can see the results of uncontrolled intragranular (exfoliation) corrosion, around the two rivet shop-heads. Message received. Chemically, aluminum is much more reactive than iron. I guess I just never made the connection that, because aircraft are clearly optimized for lightness and strength, they were so susceptible to corrosion. So sad.
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Oct 19, 2012 19:09
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MrYenko posted:In the center of this image, you can see the results of uncontrolled intragranular (exfoliation) corrosion, around the two rivet shop-heads. Another issue is that Spits used magnesium alloy for the rivets, it's not like they expected them to last for a long time. Galvanic series corrosion + 60 years = uh-oh. It's not like they need more than the ID plate, though, so hopefully those will be intact.
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Oct 19, 2012 20:34
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movax posted:Pretty cool, a Air Canada 777 got a little SAR action near Australia. Maybe it's just stereotypes/my experience talking, but I feel like an American carrier would have either said no, not had enough fuel, or helped out and then promptly handed out reprimands to the entire crew of the plane. I doubt the FAA would even allow something similar to that.
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Oct 19, 2012 21:05
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Not to mention that there should to supposedly 50 or so of them, so hopefully they'll be able to rebuild at least one.
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Oct 19, 2012 21:05
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Ridge_Runner_5 posted:I doubt the FAA would even allow something similar to that. They actually would/do. Although generally speaking Australia has much more coastline, especially lightly inhabited coastline, so there's a higher chance of needing to do things like this instead of the use of Coast Guard/local shipping assets. And of course, you dont want to put a civie A330 loaded with people into an unknown situation unless you really have to.
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Oct 19, 2012 23:22
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Off on an aviation tour of DPRK in a couple hours. Probably wont see the reply until I get back to civilisation but, I presume y'all want to see photos of even the most mundane plane related things from up there? P.S Today's aircraft is P-881... also known as the IL-62 with the hat racks.
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Oct 20, 2012 02:21
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Powercube posted:Off on an aviation tour of DPRK in a couple hours. Probably wont see the reply until I get back to civilisation but, I presume y'all want to see photos of even the most mundane plane related things from up there? Oh mansies that's awesome. Tu-134s, Tu-154s and IL-62s please!
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Oct 20, 2012 02:38
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Powercube posted:Off on an aviation tour of DPRK in a couple hours. Probably wont see the reply until I get back to civilisation but, I presume y'all want to see photos of even the most mundane plane related things from up there?  What the... How'd you manage to fall into a thing like that? And yes, pictures please.
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Oct 20, 2012 03:15
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I've decided I love old US propoganda films. Pre-Vietnam US is such a different society than today... https://www.youtube.com/watch?v=HHee8RzSctQ
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Oct 20, 2012 03:53
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HeyEng posted:So Red Flag is going on here up in Alaska. It's pretty cool what with all the international players and poo poo. It's like that scene in ID4 of all the nation's coming together to take down the alien ships. This isn't even that big of an exercise, honestly, especially compared to something like 12-2 back in June. It still is pretty funny to see everyone walking around at the parties in our hangar with patches from 5 different countries on their flight suits...in August my attire for the ENDEX party was a uniform blouse from the RAF with ABU pants, and in June it was an Australian blouse. Were those the RSAF F-15s and F-16s? And that ATTACK CARRIER video is pretty cool. The Vigi and Whale footage was nice, as was the footage of the Crusaders taking off with the variable incidence wing...along with all the archival footage from pre-WWII.
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Oct 20, 2012 07:30
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Ridge_Runner_5 posted:I loved the cover story on that. The government's story said the helicopter collided with a civilian airliner, then flew back to base. The airliner crashed and killed everyone on board. Well one did have a midair with an Airbus.... http://www.avherald.com/h?article=45671063&opt=0
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Oct 20, 2012 09:12
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Mobius1B7R posted:Well one did have a midair with an Airbus.... Wow, that's really impressive. Been ages since I kept up on aviation terminology. FL120 is 12,000ft, right?
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Oct 20, 2012 19:35
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More or less.
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Oct 20, 2012 20:10
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gibber posted:Ardmore airport is about 15 minutes away from here. What a day! Lots of people turned out to see the Mosquito today, wonderful to see.  E: This is the old Jeff Ethell (RIP) Mustang, no? Boomer The Cannon fucked around with this message at 20:41 on Oct 20, 2012 |
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Oct 20, 2012 20:14
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https://www.youtube.com/watch?v=A4O8kaKMv_U
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Oct 21, 2012 01:27
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Goddamn, at the 40 second mark I was sure I was about to see them all die.
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Oct 21, 2012 02:55
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I almost poo poo my pants.
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Oct 21, 2012 19:37
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