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I look forward to reading about cause. That crash a few years agoFrom Avweb. No one killed but there are serious injuries.
"For the second time in three days a relatively rare vintage Lockheed 12A Junior Electra has crashed, this time in Georgia and with no fatalities. Three people aboard the plane were seriously injured when the plane apparently went off the runway and hit a tree at Seven Lakes Airport in Jackson, Georgia. The airport has a 2950-foot turf runway. The accident occurred at about 8 p.m. The aircraft is registered to a company based in Jackson and is well known in the area."
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I look forward to reading about cause. My whole perspective of vintage operators changed after the 2019 B-17 crash. If I remember correctly, they ignored published ignition system maintenance. All plugs fouled. Since I'm ranting about that now I will go on. - I have spoken with operators who told me they pulled one plug from each cylinder at very frequent intervals and had them cleaned by pyrolysis (baking with or without ozone). People in the past would incorrectly use grit blast which is completely wrong. The ceramic insulator has glaze which is eroded by the grit, and the grit gets wedged, and it erodes electrodes. So anyway the cost of periodic cleaning is so low that you scrap the plugs due to electrode spark erosion and never experience weak ignition due carbon shorting. Reportedly the B-17 people ran their plugs until they failed mag drop as they were confident they had tons of power given light payloads.From Avweb. No one killed but there are serious injuries.
"For the second time in three days a relatively rare vintage Lockheed 12A Junior Electra has crashed, this time in Georgia and with no fatalities. Three people aboard the plane were seriously injured when the plane apparently went off the runway and hit a tree at Seven Lakes Airport in Jackson, Georgia. The airport has a 2950-foot turf runway. The accident occurred at about 8 p.m. The aircraft is registered to a company based in Jackson and is well known in the area."
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If I would have a guess my opinion would say both brakes went out or the right one went bad on landing. Another possibility is landing too long. But I bet its a brake issue.From Avweb. No one killed but there are serious injuries.
"For the second time in three days a relatively rare vintage Lockheed 12A Junior Electra has crashed, this time in Georgia and with no fatalities. Three people aboard the plane were seriously injured when the plane apparently went off the runway and hit a tree at Seven Lakes Airport in Jackson, Georgia. The airport has a 2950-foot turf runway. The accident occurred at about 8 p.m. The aircraft is registered to a company based in Jackson and is well known in the area."
View attachment 784152
According to YouTube it may be a unlocked tail wheel. However both main landing gear were overhauled just prior to accident.If I would have a guess my opinion would say both brakes went out or the right one went bad on landing. Another possibility is landing too long. But I bet its a brake issue.
Interesting, new to me, plug cleaning procedure. In the early 1960s the "grit" system was used at our reserve base, C-119s. We were allowed to clean our car plugs if not too often.I look forward to reading about cause. That crash a few years ago
I look forward to reading about cause. My whole perspective of vintage operators changed after the 2019 B-17 crash. If I remember correctly, they ignored published ignition system maintenance. All plugs fouled. Since I'm ranting about that now I will go on. - I have spoken with operators who told me they pulled one plug from each cylinder at very frequent intervals and had them cleaned by pyrolysis (baking with or without ozone). People in the past would incorrectly use grit blast which is completely wrong. The ceramic insulator has glaze which is eroded by the grit, and the grit gets wedged, and it erodes electrodes. So anyway the cost of periodic cleaning is so low that you scrap the plugs due to electrode spark erosion and never experience weak ignition due carbon shorting. Reportedly the B-17 people ran their plugs until they failed mag drop as they were confident they had tons of power given light payloads.
I guess possibly also tyre fail?If I would have a guess my opinion would say both brakes went out or the right one went bad on landing. Another possibility is landing too long. But I bet its a brake issue.
On Youtube they mention an identical mishap with a 12A where the pilot gave it too much Left rudder, but I would bet on a brake problem.If I would have a guess my opinion would say both brakes went out or the right one went bad on landing.
To my surprise gear oils and greases cause locking of brakes. The belief is that the grease may lubricate momentarily but as it heats it hits a polymerization phase and attempts to glue the disc or drum to the pad. Washing in chlorothene a few times helps break up the deposit, high risk fix is a torch (risks delaminating the pad), but oven soak at say 190 degC for several hours causes the grease to mostly Coke, or, by using it the braking heat will accomplish the same thing.On Youtube they mention an identical mishap with a 12A where the pilot gave it too much Left rudder, but I would bet on a brake problem.
I had a recent problem with my airplane pulling sharply to the Left when the brakes were applied; it would have been a real problem if it had not been a steerable nosewheel equipped nosedragger. Took the Left brake off and all looked fine, except possibly a small smear of grease on one pad. I cleaned everything but the problem persisted. So my A&P suggested swapping the right and left brake pads and sure enough, the problem switched to the Right brake, although greatly reduced. It is almost gone now.
Well, in many countries they have prohibited the "hydrohalocarbons" such as perchloroethylene, Chlorothene. These were super at cutting the long organic chains in hydrocarbons so the thick oil became a mix of thin oils and evaporated. But, they are linked to Parkinson's disease. New, flammable brake cleaners work but performance varies greatly with the blend. I have one here that is very weak. A different one I have with hexane is very good.If any members drove old cars with drum brakes, you will know when grease or brake fluid gets on the brake shoes. That wheel's brake will momentarily lock with appropriate tire squeal. Modern Brake cleaner in spray cans is same as pixie dust to eliminate the grease.
Not exactly a guess since Gryder confirmed it last week and re-stated it in detail during his live chat on Sunday.If I would have a guess my opinion would say both brakes went out or the right one went bad on landing. Another possibility is landing too long. But I bet its a brake issue.
After the govment protected us from scary chemicals, we used MEK to clean shoes/pads - eliminates petroleum based contaminants without delaminating the brake shoe/pad material.If any members drove old cars with drum brakes, you will know when grease or brake fluid gets on the brake shoes. That wheel's brake will momentarily lock with appropriate tire squeal. Modern Brake cleaner in spray cans is same as pixie dust to eliminate the grease.
Speculation is not good. You weren't there and don't know.If I would have a guess my opinion would say both brakes went out or the right one went bad on landing. Another possibility is landing too long. But I bet its a brake issue.
See post 8. He was on the plane and said brakes.Speculation is not good. You weren't there and don't know.
After the govment protected us from scary chemicals, we used MEK to clean shoes/pads - eliminates petroleum based contaminants without delaminating the brake shoe/pad material.
It evaporates a bit slower, but works perfectly.