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"There's been too many examples [...] where owner/builder has thought they could open the envelope slow and been surprised how fast the envelope opens itself, with unfavorable results." but really, tell us how you really feel: "so, unfortunately, like I said, so, this is sort of the worst case scenario in that we sort of armed the gun and put it in the hands of a child, and we're telling him: 'please don't point it at your face'"
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Oct 22, 2020 00:18
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Yeah I'm watching through it and there are some...eye-openers. "The bolt is just drilled through, it goes straight through the 7075 there." "So there's no bushing in the gear hole?" "No." "It's not a tight fit either? Like a press fit?" "No. Well those bolts aren't even straight." "Like the bolt is bent you mean?" "Yeah, brand new, that's how they were. They just can't make them long and straight." "Yeah, cause they're so...long..."   e: talking about how the engine induction creates a vacuum in some part of the plane and gives a false static pressure reading: "You know they make pitot booms that have the static port integrated in them." "Yeah, this one does have one, it has it" "Have you used that one yet?" "Yeah that uses a separate hole in there...to figure out..." (takes one look at the pitot) "yeah this doesn't have static in it" e2: omgggg the reduction drive belt pulleys have tooling marks and obvious burrs on them. what the gently caress Sagebrush fucked around with this message at 00:37 on Oct 22, 2020 |
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Oct 22, 2020 00:30
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This video is amazing. I thought about designing and building an airplane today, and this is not dissuading me one bit because I'm not as much of a dickhead as this guy lol
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Oct 22, 2020 00:40
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Sagebrush posted:
wait until you get to the a/c
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Oct 22, 2020 00:42
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in a discussion about whether the engine and prop are capable of developing full static power: "well it sounds like it's getting full power..." drat poo poo if only there were some way of testing that, some sort of meter that might measure force, which you might record in dynes perhaps,
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Oct 22, 2020 00:46
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Has this thread seen the Prescott Spitfire built in a garage? https://www.youtube.com/watch?v=pzkoTulqA1U
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Oct 22, 2020 01:59
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Sagebrush posted:Yeah I'm watching through it and there are some...eye-openers. We need a better emote to convey "Screams in A&P" 
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Oct 22, 2020 02:26
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I'm rewatching the Wasabi vid and there's just so much - Peter (the builder) resists a recommendation to set a brake restrictor valve to allow the test pilot access to max possible braking force during taxi tests because the manufacturer recommended some lower limit and they must have some reason for it. Justin (test pilot) responds "I guess it comes down to whether you want to save the brakes or save the plane at the end of the runway" - in response to their request to fix wing skin that had disbonded from a rib due to his own design or build error, "I see what you're saying, but don't know how that is any sort of thing which needs to be addressed right away, there's no chance in hell that can keep separating all the way down". (this was Wasabi applying their policy of not testing with damaged primary structure, which, you know, is reasonable.) The comments are actually worth going through. I think this one about sums it up. quote:Flyby Wire
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Oct 22, 2020 02:30
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Nebakenezzer posted:20:10 - OK, I've never heard of this - they actually used to have weather ships in the Atlantic? I can’t believe I knew something about Atlantic maritime history that Nebakanezzer didn’t. References are occasionally made to the positions of the ships as if they were still out there. If someone says they “passed Quebec” in the Pacific Ocean, they’re not talking about the Canadian province. They crossed the hundred and sixty‐seventh meridian west somewhere in the vicinity of forty‐three degrees north, the intersection of which is the old haunt of weather ship ‘Q’.
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Oct 22, 2020 03:08
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BobHoward posted:Man, you sent me back down this rabbit hole, and what a ride it was. What an excellent breakdown. Also, just  that he canned them after that, and then we get the awesome porpoising on that ill-advised flight. Someone point Jerry at this guy.
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Oct 22, 2020 05:11
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It's really a shame that he canned them before the flight because drat I would have loved to see their reaction to that flying behavior. Of course if he'd kept them around they might have done enough engineering to work it out before actually going up with a human aboard.
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Oct 22, 2020 05:26
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I think they totally blew the relationship by posting that video. Airport issue should have been sorted by the first visit, not the third. Sure, it was the right decision, but by that point the relationship had clearly broken down.
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Oct 22, 2020 05:28
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Edit: dumb comment
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Oct 22, 2020 05:43
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BobHoward posted:Man, you sent me back down this rabbit hole, and what a ride it was. Thanks for this, wasabi video was great. Now I want a live reaction video of them watching his first flight.
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Oct 22, 2020 10:57
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I went back and watched the ground effect test video and the plane was oscillating during ground effect testing. In his flight test video later he goes and does his flight test around the pattern and realizes that his plane is oscillating.
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Oct 22, 2020 18:03
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The wasabi guys are wizards, their channel is also worth subscribing to. He is incredibly thorough and rigorous and it makes me want to be a better engineer and pilot. If you were paying them (what I assume is a significant amount of money) to help flight test your airplane, you’d also do well to listen to them. Unfortunately, from what I’ve seen in the YT comments on the first flight video, the designer doesn’t seem to be open to anything other than ball fondling and adoration from his fans. The haphazard shotgunning of parts and “fixes” at the airplane - like the angle channel taped to the wing in front of the gear well to fix something - really shows how much the guy thinks he knows. It’s like high stakes dunning-Krueger Russian roulette. One way or another, he’s going to end up not having to worry about the problems with the airplane, but I don’t think it will be because he’s fixed them...
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Oct 22, 2020 18:34
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There's a thing that Destin from Smarter Every Day says sometimes which is that he always wants to be the dumbest person in the room, and I think that's the best mentality. Some people want to be the smartest person in the room, so they attack and ignore anyone that's smarter than them, and surround themselves with yes men and idiots.
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Oct 22, 2020 18:40
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Mao Zedong Thot posted:This video is amazing. I thought about designing and building an airplane today, and this is not dissuading me one bit because I'm not as much of a dickhead as this guy lol Seriously, if people are giving me constructive feedback I'm going to try their suggestions. Just because its your design doesn't mean you know everything about it.
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Oct 22, 2020 18:49
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Yea they definitely posted that video to ensure the extent of their liability in the accident investigation was clear to all.
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Oct 22, 2020 19:33
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I'm watching this video and I'm 24 minutes in, and I suddenly notice this thing has gullwing doors. I mean I guess you don't need a tiny change tossing window
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Oct 22, 2020 22:24
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Nebakenezzer posted:I'm watching this video and I'm 24 minutes in, and I suddenly notice this thing has gullwing doors. Backup wings for when the skin peels off.
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Oct 22, 2020 23:20
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Had a couple skycranes that are obviously doing fire poo poo fly over me super low a little while ago. Pretty cool outside of half the state of Colorado burning.
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Oct 22, 2020 23:29
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Caspian Sea Monster rises from its watery grave.
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Oct 23, 2020 00:02
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Godholio posted:What an excellent breakdown. Also, just Truly the test pilot he deserves.
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Oct 23, 2020 02:48
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Midjack posted:Caspian Sea Monster rises from its watery grave. Dammit, I was kinda hoping they were going to restore it to operational or use it to rebuild.
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Oct 23, 2020 11:03
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Rudest Buddhist posted:Has this thread seen the Prescott Spitfire built in a garage? Going back a bit, but this is the most beautiful use of an Allison 1710 there ever was. That old man is a JRR Tolkien class wizard, good lord below
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Oct 23, 2020 11:41
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Humphreys posted:Dammit, I was kinda hoping they were going to restore it to operational or use it to rebuild. It's been sitting in salt water for 30 years with little or no maintenance. Just looked it up and the Caspian Sea isn't nearly as high salinity as the open ocean, but still, there has got to be a lot of corrosion in that thing by now.
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Oct 23, 2020 12:06
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On the topic of Ekranoplanes and the famous design issue with needing a lot of power to get going but very little for maintaining locomotion, leading to the Monsters having 6-8 engines described derided! slander! as dead weight; I wonder what a sufficiently big afterburner to lift something that size would weigh? Imagine  something with a GE-90 on the back with a Saab Viggen inspired burner set up for take off power. Would the math come out more efficient than the lift engines solution? A burner is essentially just a chonky metal ring with holes in it placed in a high density air stream right? And the newest high bypass fans produce a hefty airflow, full of unused oxygen that would happily burn if you'd give it a little confidence. Surely it can't weigh more than the alternative here and if it's only needed for take off, the overall fuel efficiency remain? Tell me what I'm missing. ThisIsJohnWayne fucked around with this message at 13:02 on Oct 23, 2020 |
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Oct 23, 2020 12:58
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Those front jets are only there to blast air underneath the lifting services during take off. Any comically large modern takeoff engine would have to be mounted on the front to supplant that function
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Oct 23, 2020 13:05
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Midjack posted:Caspian Sea Monster rises from its watery grave. what the world needs is a380-sized regular passenger service ekranoplans
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Oct 23, 2020 13:10
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Potato Salad posted:Those front jets are only there to blast air underneath the lifting surfaces during take off. Any comically large modern takeoff engine would have to be mounted on the front to supplant that function  Thank you
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Oct 23, 2020 14:15
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https://www.youtube.com/watch?v=wk2TpEiKA9g
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Oct 23, 2020 14:57
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That’s a pro listen.
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Oct 23, 2020 15:06
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Now see if from N768FS’s perspective. https://www.youtube.com/watch?v=gUjOHSP7Q4g&t=495s
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Oct 23, 2020 15:11
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Watching these videos, and this one especially tells me that even if I won the freaking lotto, I should never be allowed to think about flying a plane. My brain has developed serious tunnel-vision as I've aged so keeping track of all that stuff would be impossible.
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Oct 23, 2020 15:19
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Mr. Funny Pants posted:Watching these videos, and this one especially tells me that even if I won the freaking lotto, I should never be allowed to think about flying a plane. My brain has developed serious tunnel-vision as I've aged so keeping track of all that stuff would be impossible. One of the things they drill into you during flight training is how necessary it is to keep scanning your instruments and the world outside. It's a muscle you have to build.
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Oct 23, 2020 15:23
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Platystemon posted:Now see if from N768FS’s perspective. holy crap, he wasn't exaggerating, that's crazy close
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Oct 23, 2020 15:33
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Have some F117 coming back from mysterious poo poo https://www.youtube.com/watch?v=HtYgAuMmGSI
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Oct 23, 2020 15:36
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What if there were a high efficiency diesel for cruise with a hybrid power system with electric fans/props for takeoff? Raptor guy: you must pivot to ekranoplans
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Oct 23, 2020 15:46
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Spaced God posted:Have some F117 coming back from mysterious poo poo They must be continually training pilots for these things. All the guys I knew that used to fly them when they were decommed are WELL retired now.
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Oct 23, 2020 16:18
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