LeSving wrote:
What I have felt from time to time when flying close to vertical or near vertical surfaces, is sudden dizziness, like the dizziness you get when standing on a cliff with a 2-300 m drop straight down. Dizziness due to height
I guess that was the usual vertige when moving your head left/right while aircraft rotates rather than watching aircraft nose? it’s funny in gliders where one is more likely to move their heads while the aircraft manoeuvres you have more risk of short vertigo panics but then you far more are likely to disregard them as turns and gaining altitude is the healthy thing to do, it’s bread and butter when flying no engine near terrain
Or leave it to pax but then you will need a brave guy or as gallois said a professional photographer 
There is certainly a strong temptation to keep taking photos whatever is happening with the plane. I don’t think I have ever done anything in that department which was actually unsafe but I have done some landings which were “well sub optimal” because I was trying to get short-final pics.
Maybe that is what was happening… but normally if you have a passenger then he/she can do the shooting – unless they are totally inept.
“I cannot remember a single moment where I have been confused about distance from mountains or problems due to lack of horizon”
Agree. A climb to lose excess speed and get nearer to one side, then a steep, descending turn, is my usual technique.
Getting low and uphill in a valley leaves only hoping for a spot to put down.
Ibra wrote:
I guess that was the usual vertige when moving your head left/right while aircraft rotates rather than watching aircraft nose?
Some kind of vertigo for sure. I fly aerobatics, never had the feeling then though. It is connected to vertical surfaces, large ones (2-3000 feet or more) and flying close (1-300 feet maybe), but I haven’t really investigated it in detail
I find that “viewfinder” thing above interesting. The brain works in mysterious ways.
Another misconception in these altitudes is that there is a big differences between IAS and TAS. Even if you maxperformed your plane at Vy while climbing, at 10000ft, your Tas will be ~13% bigger, and then turn radius.
It also count when taking of, as you are aiming IAS at Vr, but your engine needs to bring you at the corresponding Tas, especially if you are loaded and when hot, you add some speed margin. It’s a recipe for overrunning the runway.
It does count in mountain rating when you study the requirement on an altisurface, where you can often land due to runway profile, but not always takeoff, which leads you to land with a not negligible tailwing component. We also learn some technics to do 180 in very close valley, but in any case, you need energy to do it, and the video clearly mention it.
Anyway mountain kills and will kill again. My teacher started the first lesson saying mountain rating is a permit to crash.
Yes TAS vs IAS on takeoff is one cause misconception on takeoff at high density altitude, even with turbo that keeps 100% power they do not guarantee a good takeoff distance as you will need more “TAS energy” (same fashion as for landing distance which also increase in a non-intuitive way but one need to bring TAS/IAS spread to understand it energy wise), hence the “soft air” takeoff technique just like “soft field” you keep going in ground effect building that “TAS energy”
Having lot of TAS energy while good for climbs is not healthy for tight turns nor hitting the trees at the end of the runway or on impact
LeSving wrote:
I find that “viewfinder” thing above interesting.
I enjoy taking pictures. What I feel is that when looking into the view finder or on the screen of the camera, you get a sort of feeling that you are now only an ‘neutral observer of what is happening’ and not an ‘actor’ any longer. What I’m trying to say is that when trying to take a picture, your brain consider that all you can do is play with your camera to capture what is happening, but sorts of forget that you could also act to change what is happening. I’m not taking as many pictures when flying as PIC as I would like to because of this (also when you realize that you can control the aircraft, you also realize that you should do this looking outside, not through the camera).
LeSving wrote:
I find that “viewfinder” thing above interesting.
I dont know what others do but if my GF/Partner isnt with me to take pics and Im by myself, I turn off the camera screen and have never even thought of looking through the viewfinder while flying. I just point the camera in the general direction and press the button a half dozen times or more making sure the lens is as close as possible to the canopy. Usually there is at least one OK photo.
Regards, SD..
