Johnny Dioxin Posted October 5, 2015 Posted October 5, 2015 I flew the nav mission for the L-39C. I had only just assigned the controls and wanted to test them. It was my very first flight in the Albatros. I followed the course and decided to land at Krymsk. My approach speed was relatively high, at around 200kts, but the landing was reasonable (despite how hard it looks in the track). After a few dozen metres on the runway, with landing flaps set and the airbrake fully extended, the aircraft suddenly just took off again. It reached a fair height before I managed to bring it back down (this time it was hard) and landed safely. I haven't checked the approach and landing speeds for the L-39, but even if I was going faster than normal, at 93kts with full flaps and airbrake, I should not be launching off into the air. Especially not with forward stick and wheelbrakes on, too. Track is attached. Have a good laugh at my semi-infield take-off - that nosewheel steering was pretty wild! I actually only got airborne due to the dropaway of the ground after the end of the runway :) Rig: Asus TUF GAMING B650-PLUS; Ryzen 7800X3D ; 64GB DDR5 5600; RTX 4080; VPC T50 CM2 HOTAS; Pimax Crystal Light I'm learning to fly - but I ain't got wings With my head in VR - it's the next best thing!
OverStratos Posted October 6, 2015 Posted October 6, 2015 Believe or not, it´s really possible in real life. Depends on speed and wind. I´m going to watch the track to see the speed, but you need to have in mind that the L-39 flaps are double slotted with natural air bleeding and generate a LOT of lift. Also, how was the wind in your flight, did you check that?
Johnny Dioxin Posted October 6, 2015 Author Posted October 6, 2015 (edited) I didn't check the wind - as it was a nav training flight, I assumed it would be calm, but of course, I could be wrong - I'll go and have a look :) Looking in the miz file, it looks like ground wind speed was set to '5', so I take it that's 5 knots - which isn't really enough to do much. Just looked at the briefing, and it's 5m/s. I'll do a few circuits this evening in that mission, and see how it goes. Hope you enjoyed watching the take off :D Edited October 6, 2015 by Brixmis Rig: Asus TUF GAMING B650-PLUS; Ryzen 7800X3D ; 64GB DDR5 5600; RTX 4080; VPC T50 CM2 HOTAS; Pimax Crystal Light I'm learning to fly - but I ain't got wings With my head in VR - it's the next best thing!
Lascaille Posted October 6, 2015 Posted October 6, 2015 It seems that thrust keeps the nose down, as you reduce thrust the nose can float up. I am also finding that with full back trim I still need some back pressure to keep the nose from dropping, this is remedied by less thrust. You can also land very smoothly in this thing while being far too fast - I was aiming for 200kmh landings, but you can land with less.
Vlerkies Posted October 6, 2015 Posted October 6, 2015 She plants pretty well, and that undercarriage took a solid knock. On smoother landings at slightly higher speeds I have not encountered the L-39 wanting to lift its nose at all (just flying the default missions with 1.5.x) Hi Honey I'm home, bounce. :D Thermaltake View 91, Z390 Gigabyte Aorus Ultra, i9 9900K, Corsair H150i Pro, 32Gb Trident Z 3200, Gigabyte Aorus Extreme 2080ti, Corsair AX1200i, Warthog A-10 Hotas, MFG Crosswind pedals, TiR5 Pro, HP Reverb Pro
PondLife Posted October 6, 2015 Posted October 6, 2015 I flew the nav mission for the L-39C. I had only just assigned the controls and wanted to test them. It was my very first flight in the Albatros. I followed the course and decided to land at Krymsk. My approach speed was relatively high, at around 200kts, but the landing was reasonable (despite how hard it looks in the track). After a few dozen metres on the runway, with landing flaps set and the airbrake fully extended, the aircraft suddenly just took off again. It reached a fair height before I managed to bring it back down (this time it was hard) and landed safely. I haven't checked the approach and landing speeds for the L-39, but even if I was going faster than normal, at 93kts with full flaps and airbrake, I should not be launching off into the air. Especially not with forward stick and wheelbrakes on, too. Track is attached. Have a good laugh at my semi-infield take-off - that nosewheel steering was pretty wild! I actually only got airborne due to the dropaway of the ground after the end of the runway :) The manual says to apply full forward stick and retract the flaps for short landings. My approach speed is also about 200 KPH but I throttle back before flare and she seems to stick quite well. This vid demos it, landing at the end:
Johnny Dioxin Posted October 6, 2015 Author Posted October 6, 2015 OK - thanks for the replies. This wasn't a bounce, because I travelled along the runway for a bit before rising back into the air. Some interesting points, though. tbh I have only had a very quick browse through the quickstart manual, so far - been too busy flying... :pilotfly: Rig: Asus TUF GAMING B650-PLUS; Ryzen 7800X3D ; 64GB DDR5 5600; RTX 4080; VPC T50 CM2 HOTAS; Pimax Crystal Light I'm learning to fly - but I ain't got wings With my head in VR - it's the next best thing!
OverStratos Posted October 7, 2015 Posted October 7, 2015 The manual says to apply full forward stick and retract the flaps for short landings. Almost every aircraft manual instructs to retract flaps after gears have touched the ground. The purpose is to increase friction and make the brakes more effective.:) but even if I was going faster than normal, at 93kts with full flaps and airbrake 180km/h + 18 (5m/s) = 198-200km/h so for now I think that if you just move the elevators an inch up the aircraft will levitate. When you feel the ground, throttle in min. and flaps up, report back and tell what happened.
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