Rope Break at 200 Feet
At 14:20 local you are solo in a Schweizer SGS 2-33 on aerotow from a 2,600-ft grass runway at 4,200 ft MSL. Temperature is 30°C, altimeter 30.02, density altitude about 6,800 ft. The tow plane lifts off at 55 mph; at 200 ft AGL, 1,100 ft down the runway, the weak link breaks. You are at 60 mph with an 8-kt headwind. Forty-foot trees begin 600 ft beyond the departure end, and the remaining runway is 1,500 ft. A club instructor on the radio says, 'You have room to turn back.' You have briefed the takeoff emergency plan but never practiced a low-altitude turnback in this glider. The glider has no engine or ballistic parachute. The altimeter reads 200 ft above the runway, and the variometer shows 300 fpm down after the break.
1. State your immediate control actions and intended touchdown zone for the first five seconds after the break, and explain why each action matters at this density altitude.
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Immediate action is to lower the nose to preserve 55–60 mph and land straight ahead, or with only a small heading change to stay on the runway. Do not chase the towplane or stretch the glide. At 6,800 ft density altitude the true airspeed is higher than indicated, so the glider covers ground faster and the remaining runway passes quickly. The 8-kt headwind lowers touchdown groundspeed, but 1,500 ft is still limited. Keep spoilers closed until the touchdown point is assured, then open them and brake. The 40-ft trees are 600 ft beyond the departure end; a straight-ahead touchdown and prompt stop should keep you clear, while a turn increases bank load, stall speed, and sink at the worst moment. The 2-33 has no engine or ballistic parachute, so altitude and airspeed are the only energy available.
2. A club member urges a 180° turn back because the runway is long. Evaluate the turnback using turn radius, altitude loss, and the obstacles; what minimum conditions would you require before attempting it?
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A 180° turn at 60 mph and 30° bank has radius R = V²/(g tan φ) = (88 ft/s)²/(32.2 × 0.577) ≈ 416 ft, so the horizontal diameter is about 832 ft. That fits inside the 1,500 ft runway, which is why the suggestion sounds plausible. But the turn takes about 17 s at 10.5°/s; at 300–400 fpm sink that is 85–115 ft lost, plus recognition and bank entry, leaving little margin above the 40-ft trees if the turn is imperfect. At 6,800 ft density altitude the true airspeed and turn radius are larger for the same indicated speed. I would not attempt a turnback at 200 ft AGL. I would require a demonstrated maneuver in type, at least 300–400 ft AGL, no obstacles, a clear runway, and no passenger pressure; even then the maneuver must be briefed before takeoff.
3. After landing, what operational actions would you take before towing again that day?
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Clear the runway, secure the glider, and inspect the weak link and tow hook. Report the break to the tow pilot and club, and log the event. Do not launch again until the release and weak link have been inspected and any damage repaired. If the weak link failed, replace it with the correct rating; if the hook or cable failed, remove the glider from service. A second tow that day is reasonable only if the cause is understood, the equipment is airworthy, and you are not rushing to salvage the day. If the break was caused by a towplane power loss or abnormal signal, discuss the procedure with the tow pilot before the next launch.