I replaced the 13mm with 24mm. She’s survived a Cato and lawndarting. She’s a true warrior!
I believe rockets have a personality. Some will always come back and some will decide to go on an adventure and land on a roof or in the canal. Some like the Indicator are abused and forgiving. Some like the Expedition are coddled and saved for very good conditions. Some are fragile but I keep patching them up. Some are brutes like the new V2 who can shrug off a lawndart like it was meant to do that.
Wow! I bet that baby would have been outa da park on a 24mm.
I white glued the fins on the sustainer for strength as much as cosmesis, and also did the one sides “cheaters” on both the rear fins and the small “finlets” that I parasitized from the sustainer. I was afraid without the forward finlets the booster might lawn dart.
my launch area had big grassy fields all around, with an asphalt parking lot in the middle. I tend to launch from the middle, as it gives me more space 360 degrees for wayward rockets, the down side is that when they Don’t migrate far they land on the hard asphalt,
tumble recovery is a bit tough on rockets (booster and otherwise), the Estes plastic ones probably do well, for paper and balsa you are just about guaranteed at least an impressive scuff or ding if it lands on asphalt, concrete, or rock. Gap staging is also a bit tougher, as the added length is usually just more weight. And unless you can account for that with more fin surface....
hmmm, just came up with an idea. My fin can for the BackSpin might work just by itself as a non-gap stage booster. Now THAT is going to be cool, and it is gonna have one HECK of a Magnus effect because it will have a big spiining radius and low mass. Unfortunately the Magnus effect is lateral, but the conservation of angular momentum rule will keep it horizontal and max drag, and the cut ring fins should hit the ground on the convex side, so they should bounce rather than break.
okay, next two scratchers are mini-BackSpin and a two stage BackSpin.
of course, I now have two Estes F15-0s, I need to get to work on the 72” gap two stage model....