I made two changes to eyelash prior to launching it again.
I added an internal bulkhead connection as a firm connection for the backup tether in case the bolts of the electronics bay pulled out. This is the tab with the hole and arch just behind the lower screw mount in the photo below.
I also trimmed down the fins so that the rocket is not quite as overstable.
Even after trimming to reduce drag, the rocket left the pad with 3.3 calibers of stability. I did minimal trimming because the rocket was predicted to go about Mach 1.6. I don't have a lot of experience with supersonic flight with a fin height less than one body diameter. The trimmed fins have a span of just 33 mm, which is 0.81 of the 41 mm body outer diameter. I now know this can result in stable flight with a large stability margin.
Here is eyelash (right) with trimmed toenails along with new sibling that I call Effed Up.
I added an internal bulkhead connection as a firm connection for the backup tether in case the bolts of the electronics bay pulled out. This is the tab with the hole and arch just behind the lower screw mount in the photo below.
I also trimmed down the fins so that the rocket is not quite as overstable.
Even after trimming to reduce drag, the rocket left the pad with 3.3 calibers of stability. I did minimal trimming because the rocket was predicted to go about Mach 1.6. I don't have a lot of experience with supersonic flight with a fin height less than one body diameter. The trimmed fins have a span of just 33 mm, which is 0.81 of the 41 mm body outer diameter. I now know this can result in stable flight with a large stability margin.
Here is eyelash (right) with trimmed toenails along with new sibling that I call Effed Up.