StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller

My 2-3 year old son and I have been launching bottle rockets in our yard and in fields around town for the past two summers. After about 200-300 launches, we finally managed to destroy the the foam fins that came with the Quest Aerospace Deluxe Single Water Rocket Set.My wife just got me these StratoFins for father's day, and my son and I love them. They make refilling the rocket much easier compared to the foam fins that we'd been using. These are easier to unscrew and re-screw on while refilling the bottles. Also it's easier to switch between bottles because the same fins can be used on multiple bottles, no need to make new fins for every bottle.We've used our StratoFins for a few dozen launches each on both 1liter and 2 liter bottles, and they work great. I think they'll last many more flights than the foam ones (which I was about to replace with self made replacements before I was surprised with these as a gift. We've had maybe five launches that landed on asphalt or in the gravel on tI hhe edge of the road. There is not a single sign of damage or even any marks that didn't easily wipe off with a shirt tail.The Stratofins came with a flat black rubber gasket inside the female end of the connector, and it creates at least a good a seal between bottle and Stratofins as the seal between the Stratofins and the Quest Aerospace nozzle that we're using.It's fun to use and decorate foam, cardboard or wooden fins when you first get into bottle rocketry. If you're wanting to conduct a range of experimental flights with different rockets or other changes of setup of other elements (other than the fins themselves) these are great. They are perfectly compatible with the Quest Aerospace launcher, and I haven't seen another launcher (store bought or homemade that they wouldn't work with, because they just replicate the bottle's threads on the aft side of the fins. The red color also makes for ideal visibility regardless of whether the sky is blue or overcast.

These fins pair great with the strato launcher.

Love it but the orange brand of lancher will require a slightly larger O ring. Ever so slightly larger so it won’t begin to loose it’s water/air psi. Worth it for amazing launches. Easily could be 5 stars but they left it up to 🫵 to chase down the larger O rings. 😘

These fins survived a whole day of launching water bottle rockets, even letting my middle schoolers launch them (who are not easy on anything). Plastic was much more durable than the wings that came in my kit from another seller (but I do still use the tubing and cork from the other kit). Wings are a little tricky to get it, but once they are in, they are fabulous! Will for sure buy more for next year! I like to have several on hand for when they end up on the roof!

I bought a simple water bottle rocket science kit a while back for my son and we had a blast playing with it until we successfully "landed" the rocket on the roof of his school. I ordered these StratoFins to replace the fins that came in the original kit and am very pleased. Adding these fins to a 2-liter bottle rocket really makes the whole thing fly much straighter. You can still get some wind drift on the way up, but there's no tumbling at all on the ascent. The fins also add some drag to slow down the fall and the whole thing crashes harmlessly onto the ground. One really cool feature of these is that they replicate the 2-liter bottle's cap screw. This makes the design compatible with cable-tie launcher bases, which is awesome. The original fins we got in our kit did not do this so we were stuck using the kit's included rubber stopper as the launch mechanism. Another nice thing about these is that the fins themselves separate from the screw-on collar for storage and travel.The only minor change I would like to have seen is a more rounded lip along the edge of the fins for a more aerodynamic profile (not that I think the current design impacts performance much). Overall we're thrilled with these and look forward to using them more as we blast our rockets off to even greater heights.

I market the EZ-Launch bottle rocket launcher. I have an excellent product but for some time I have been looking for a set of fins to attach to my launcher and increase the height of the launch of the two liter pop bottle. I ordered a set of the Stratofins but found they did not properly fit on my launcher. After considerable testing we were able to make a modification on both the Stratofins and the EZ-Launch so that they were compatible with each other. With EZ-launch I was able achieve up to 200 feet in altitude with a 100 psi air pressure inside the bottle. With the Stratofins attached to the bottle, we were able to go up up to 500 feet or higher.The one caution I would offer is that at an altitude of 500 feet, there is a tendency for the bottle to be caught in a wind and drift some distance from the launch site. It would be best to launch the bottle in an open area free of power lines, trees or other objects that may interfere with identifying where the launch bottle lands.I will be advertising the Stratofins on Amazon soon as I feel it is a welcome addition to my launcher.Mr. D

I bought two different sets of fins and these were the first to break. They were way more brittle than I had hoped for and broke the tab on the fin where it joined the fin to the collar. Also was not an ideal collar fit on height for the application I hoped for, but mostly made do with those shortcomings. I won't be buying it again.

Easy to use and sturdy fins for water bottle rockets. This is a good company that makes it easy to get flying. Of course, the only downside is the costs. But if you're in a hurry or don't feel like making it all, this is one of the best with guaranteed results.