I posted a version of this to facebook, so to help clear some of the air I'll post my version here.
I was at the Hood strip shoveling my spot out and saw the take off and climb out and was first on scene to the crash. It was a normal take off but then his pitch attitude kept increasing. I've seen a lot of zoom climbs in cubs off the strip, but this did not look like a hot dog climb out. It was straight up like the controls got jammed full aft. I could see the entire top of his fuselage from behind. It reminded me of an aerobatic routine where a plane hangs from the prop. He got to around 150-200 feet before stalling. I wasn't able to see it, but based on another witness he was able to flare a bit right before the crash which was evidenced by a divot in the runway maybe 50 feet before the wreckage. That flare likely saved his life. The pilot was able to self extract but needed assistance balancing - clearly a concussion of some sort. He was solo with a full belly pod and quite a bit of fuel. There wasn't that much in the back, but there was a large duffel in the back seat. And the back seat stick was in. It does not appear that CG was the issue. Some sort of controls jamming is my best guess.
The controls were rigged correctly and it was making full power. I believe the full forward trim was an effort to get the nose down. Based on my photos, the flap on the other side is set at 1 notch, so somewhere in the crash the flap cable got disturbed, so the setting in the media photos is not necessarily the setting that the flaps were at. The left wing broke off from the fuselage and was spilling quite a bit of fuel.
I was at the Hood strip shoveling my spot out and saw the take off and climb out and was first on scene to the crash. It was a normal take off but then his pitch attitude kept increasing. I've seen a lot of zoom climbs in cubs off the strip, but this did not look like a hot dog climb out. It was straight up like the controls got jammed full aft. I could see the entire top of his fuselage from behind. It reminded me of an aerobatic routine where a plane hangs from the prop. He got to around 150-200 feet before stalling. I wasn't able to see it, but based on another witness he was able to flare a bit right before the crash which was evidenced by a divot in the runway maybe 50 feet before the wreckage. That flare likely saved his life. The pilot was able to self extract but needed assistance balancing - clearly a concussion of some sort. He was solo with a full belly pod and quite a bit of fuel. There wasn't that much in the back, but there was a large duffel in the back seat. And the back seat stick was in. It does not appear that CG was the issue. Some sort of controls jamming is my best guess.
The controls were rigged correctly and it was making full power. I believe the full forward trim was an effort to get the nose down. Based on my photos, the flap on the other side is set at 1 notch, so somewhere in the crash the flap cable got disturbed, so the setting in the media photos is not necessarily the setting that the flaps were at. The left wing broke off from the fuselage and was spilling quite a bit of fuel.