Todos
← Back to Squawk list
Stunning Nose Gear Collapse Caught on Video - What Went Wrong?
This sobering video from Tucson, AZ shows a nose gear collapse in a Remos G3. The accident occurred during a training flight with a student pilot at the controls. After flying a high approach, the aircraft lands hard, appears to bounce, then the nose gear collapses. According to the student pilot’s remarks, the airplane stalled prior to touch down, but I don’t buy it. (www.aviationchatter.com) Más...Sort type: [Top] [Newest]
"Another possibility is wind, shear or directional shift. Effects lighter aircraft more rapidly than the big boys. "
Well, with a larger aircraft, there is more inertia, so it tends to keep its motion relative to ground, whereas a smaller aircraft can be moved more quickly by the wind, thus changing its groundspeed. But it's air speed that's important for stalls. Smaller aircraft will maintain air speed better than larger aircraft because the lower inertia allows them to go with the flow.
Well, with a larger aircraft, there is more inertia, so it tends to keep its motion relative to ground, whereas a smaller aircraft can be moved more quickly by the wind, thus changing its groundspeed. But it's air speed that's important for stalls. Smaller aircraft will maintain air speed better than larger aircraft because the lower inertia allows them to go with the flow.
Tell me Victor, what happens to a light aircraft that had a 15 knot head wind, which became a 15 knot tail wind? You just lost 30 knots of airspeed. When you are close to stall speed what happens? Even just take the 15 knot head wind and then the winds go calm and you are at 5 knots above stall speed. You just lost lift.
The light aircraft, under your scenario, accelerates in ground speed more than a heavy aircraft does. Of course, the light aircraft has a lower stall speed and consequently the wind sheer is a greater percentage of the stall speed. But the heavy aircraft is less able to maintain air speed than the lighter aircraft because of its greater inertia. This is Newton's first law of motion.
Ask your same question of heavy aircraft. What do you think happened with Delta 191?
Ask your same question of heavy aircraft. What do you think happened with Delta 191?
Delta 191 was the result of a microburst-induced wind shear. According to the accident report the L1011 was landing at 149 knots IAS. When it got hit by the microburst. The airspeed went up to 173 knots then down to 119 IAS with several DOWNDRAFTS causing a descent of 5000ft/min, causing its first impact with the ground some 6300 feet short of the runway.
That is why you have Doppler Radar at airports and airborne wind shear detection and alert systems on all commercial aircraft today. Are you now suggesting the incident in Tucson was caused by a microburst?
That is why you have Doppler Radar at airports and airborne wind shear detection and alert systems on all commercial aircraft today. Are you now suggesting the incident in Tucson was caused by a microburst?
of course not
Victor - You are only considering Newton's first law of motion. I suggest you consider the following information (LIFT, which is what I am discussing) http://en.wikipedia.org/wiki/Lift_%28force%29 and deals with Newton's second and third laws of motion.
No mention of flap setting. No flaps, stall speed is higher.
Another possibility is wind, shear or directional shift. Effects lighter aircraft more rapidly than the big boys.
And last but not least, did he get hit by and unusual heat thermal? On hot days I normally like to plan on landing at a little higher airspeed. Easier for going around in case anything unexpected happens.