Rocketcrab
Well-Known Member
- Joined
- Jan 18, 2009
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- 863
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I've always said that if you stick around this hobby long enough, you'll always see something new. Yesterday I got the chance to take advantage of the beautiful weather here in SE PA - light winds, mid-60's temps - to fly a few models. One of them was my SEMROC Mark, which had never flown before. Even though the breeze was light, I wanted to keep the alititude down, so I flew it on a 13mm A3-4 using an adapter.
The boost was great, but between burnout and ejection, I saw it go squirrelly. When I recovered the model, I saw why - one of the fins had failed across the grain. Not at the root, not with the grain, but against the grain at about the mid-fin area. It did not break upon landing, because the fin piece was no where in sight. I wouldn't have thought that the stresses caused by an A3-4 would do that. :confused2: I'll try to post a pic later.
The boost was great, but between burnout and ejection, I saw it go squirrelly. When I recovered the model, I saw why - one of the fins had failed across the grain. Not at the root, not with the grain, but against the grain at about the mid-fin area. It did not break upon landing, because the fin piece was no where in sight. I wouldn't have thought that the stresses caused by an A3-4 would do that. :confused2: I'll try to post a pic later.