My comment had nothing to do with the aesthetics of the Skyranger.As ugly it is in aesthetic and aerodynamic form Skyranger is, it is fully modular and easy to add new things - i would make Tailwind W10 styled wing tips / Or Strojnik version of them for skyranger if constantly need to operate in high altitude.
The proposed runway is at 7,000 MSL.5.5 Takeoff performance
Take-off performance for short dry grass for your aircraft is contained in Annex A. Using those figures, the following additional safety factors should be applied to the distance to clear a 15metre obstacle (taken from CAA GA Safety Sense leaflet 7C).
Per 1000 ft runway height above Sea Level
Multiply by 1.1
Per 10°C increase in temperature above 15°C
Multiply by 1.1
Per 2% uphill slope
Multiply by 1.1
Soft ground or snow or wet grass
Multiply by 1.25+
If you have to take-off with a tailwind
Multiply by 1.2 for every 4 knots of wind
Now to be sure, multiply by 1.33, to take into account that you may not fly the aeroplane as well as the company test pilot did when he worked out the values in the manual.
Do you think that it could takeoff in 100m at 7,000' altitude?
I have never flown in South America, the Andes, etc. so anyone with that direct experience can feel free to correct me.I think a light, long-wing Skyranger could manage that with a turbo-modded 912 and there are a number of companies offering complete engines or conversion kits of 120-150 hp or so. The issue for me is repeatability...sooner or later that kind of mountain flying is going to bite you, hard
Takeoff runs would still be way longer simply because of the thin air. There's a considerable difference between indicated and true airspeeds up there. Wings and propellers need air, lots of it, and a 100m strip at 7000 feet isn't going to satisfy any practical fixed-wing I can think of. Especially on a warm day.Electric VTOL get full power at altitude if you want short range.
Steep turns immediately after takeoff add a huge risk. A major load factor increase right when speed is minimal. Stalling and spinning would be the usual outcome.This is looking north, which is the only possible takeoff direction. Taking off the the north, but landing to the south. The north end terminates in a big drop off into a ravine but it is facing the cliff wall which is not so far away, which you can see in the picture. Therefore taking off would require a sharp right turn, to the east, immediately after lifting off.
That's why I said VTOL. A quad copter or helicopter made with extreme low disc loading can rise in the thin air on a calm day. The forward cruise would be limited to say 20 mph or something. The Mars helicopter flies in air 1% of Earth.Takeoff runs would still be way longer simply because of the thin air
Yes I know about those things, that's why I mentioned a Zimmerman style flyer with extra power. I understand they do not stall or spin.Steep turns immediately after takeoff add a huge risk. A major load factor increase right when speed is minimal. Stalling and spinning would be the usual outcome.
That was my first thought, but with the severe turbulence you could get in a place like that, all you need is one downgust long enough to slow the rotor too much, and you're dead.Someone mentioned gyrocopters. A gyro that can do a jump takeoff would be required, but how do those handle in turbulence?
Zimmerman isn't going to help you - at sea level a zimmerman might parachute in a stall at a survivable rate of decent. At your altitude - that rate of descent isn't going to be survivable...Yes I know about those things, that's why I mentioned a Zimmerman style flyer with extra power. I understand they do not stall or spin.