MartinW 0 Posted June 13, 2015 Report Share Posted June 13, 2015 Good job Mutley's 787 on his recent trip was loaded with fuel and passengers... he wouldn't have liked this. I recall reading about how a 757, sans fuel and passengers, has the same power to weight ration as an F4 Phantom. Feel free to correct me aviation fans. Link to post Share on other sites
MartinW 0 Posted June 13, 2015 Author Report Share Posted June 13, 2015 And then of course, irritated by the 787 showing off it's prowess at the Paris airshow, the RAF nipped out for some low lever flying practice in Wales. Bet the local residents weren't too happy. Link to post Share on other sites
Captain Coffee 2,030 Posted June 13, 2015 Report Share Posted June 13, 2015 That vertical takeoff looked rather frightening and very cool. Link to post Share on other sites
hurricanemk1c 195 Posted June 13, 2015 Report Share Posted June 13, 2015 Impressive but I'll wait for a runway-side view of the take-off to make a full opinion - of course it's going to look good as it is an offical Boeing video! 1 Link to post Share on other sites
Andrew Godden 943 Posted June 13, 2015 Report Share Posted June 13, 2015 Impressive but I'll wait for a runway-side view of the take-off to make a full opinion - of course it's going to look good as it is an offical Boeing video! Couldn't agree more. Camera angle, perspective, and a thing called parallax error do wonders for creating an optical illusion to dupe the viewer.....it's what movies are made of. 1 Link to post Share on other sites
MyPC8MyBrain 273 Posted June 13, 2015 Report Share Posted June 13, 2015 i read somewhere that was 50 degrees angle and an empty aircraft Link to post Share on other sites
MyPC8MyBrain 273 Posted June 13, 2015 Report Share Posted June 13, 2015 i found this from 2014 airshow with a quick side view Link to post Share on other sites
MartinW 0 Posted June 13, 2015 Author Report Share Posted June 13, 2015 I agree in regard to camera angle. As an ex professional photographer I've forgotten much, but no, not parallax in this instance. Parallax is the perceived position of an object when viewed along two different lines of sight. For example an image viewed through the viewfinder of a twin lens reflex as opposed to an SLR. Viewing lens sees the image from a different location, requiring compensation by the photographer, unless you want your sexy models head cut off. I can't see how parallax would result in the apparent deck angle of a 787 being different. As for perspective, flattened perspective as a result of the long focal length lens wouldn't really confuse anyone in regard to deck angle. As I said, it's many years since I gained the relevant qualifications, and many years since I did this for a living, [think dev tanks and dishes rather than digital] so it would surprise me not if I've missed something. Link to post Share on other sites
MartinW 0 Posted June 13, 2015 Author Report Share Posted June 13, 2015 i read somewhere that was 50 degrees angle and an empty aircraft Your video certainly looked like 50 degrees didn't it? Link to post Share on other sites
MyPC8MyBrain 273 Posted June 13, 2015 Report Share Posted June 13, 2015 id say more than 50; easy in the second video but there's nothing to use as reference to determined, we don’t know what position the camera was taking this shoot at Link to post Share on other sites
Captain Coffee 2,030 Posted June 13, 2015 Report Share Posted June 13, 2015 I agree in regard to camera angle. As an ex professional photographer I've forgotten much, but no, not parallax in this instance. Parallax is the perceived position of an object when viewed along two different lines of sight. For example an image viewed through the viewfinder of a twin lens reflex as opposed to an SLR. Viewing lens sees the image from a different location, requiring compensation by the photographer, unless you want your sexy models head cut off. I can't see how parallax would result in the apparent deck angle of a 787 being different. As for perspective, flattened perspective as a result of the long focal length lens wouldn't really confuse anyone in regard to deck angle. As I said, it's many years since I gained the relevant qualifications, and many years since I did this for a living, [think dev tanks and dishes rather than digital] so it would surprise me not if I've missed something. Former Instrument technician...had to replace a lot of Range Marks on indicator faces...a perfect example of Parallax error. When viewing a bank of 4 engine instruments, only 1 indicator at a time will have accurate range marks depending on the Flight Engineer's head position...so they are required to keep Parallax error in mind when viewing indicators from a side angle which screws up the position of the needle relative to both the numbers marked under the needle, and the range marks placed accurately above the needle, from a position Directly in Front of and at Zero Side Angle by yours truly...at least if you are viewing the instruments on a mothballed C-141 that still has my range marks on from 30+years ago... And even at 50 degrees angle, that take off is impressive looking...as is it's turn rate. That looks like me flying a missed approach...come around NOW baby. Link to post Share on other sites
MyPC8MyBrain 273 Posted June 13, 2015 Report Share Posted June 13, 2015 a closer look, does show a 45-50 max AOA very impressive for this bird Link to post Share on other sites
MartinW 0 Posted June 13, 2015 Author Report Share Posted June 13, 2015 On my phone so ignore dodgy errors. I recall the 787 has a 30 degree pitch limit. So I wonder if the pilot flipped switches on the over head to overide the limit. Or, given that the 787 has no hard flight envelope protection like the bus, did he merely apply the extra yoke force required. Link to post Share on other sites
MartinW 0 Posted June 13, 2015 Author Report Share Posted June 13, 2015 a closer look, does show a 45-50 max AOA very impressive for this bird Pitch though, not angle of attack.AOA is the pitch up or down relative to the velocity vector. AOA will thus be lower. Link to post Share on other sites
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