--- product_id: 43502063 title: "StratoLauncher IV Water Rocket Launcher + StratoFins" brand: "relationshipware" price: "€ 126.73" currency: EUR in_stock: true reviews_count: 11 category: "Relationshipware" url: https://www.desertcart.it/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins store_origin: IT region: Italy --- # 350+ ft max launch height Upgradeable & expandable kit 125 PSI safety valve StratoLauncher IV Water Rocket Launcher + StratoFins **Brand:** relationshipware **Price:** € 126.73 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your weekend fun — launch into the stratosphere with StratoLauncher IV! ## Quick Answers - **What is this?** StratoLauncher IV Water Rocket Launcher + StratoFins by relationshipware - **How much does it cost?** € 126.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins) ## Best For - relationshipware enthusiasts ## Why This Product - Trusted relationshipware brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sky-High Launch Power:** Propels 2L soda bottles over 350 feet for epic backyard rocket shows. - • **Easy Assembly & Launch:** Comes with fill funnel and clear video instructions to get you launching in no time. - • **STEM-Ready & Expandable:** Fully upgradeable kit perfect for hands-on learning and customizing your launch system. - • **Precision Pressure Control:** Built-in 125 PSI safety valve ensures powerful yet safe launches every time. - • **Aerodynamic Flight Stability:** Includes StratoFins for screw-on rocket fins that keep your rocket flying straight. ## Overview The StratoLauncher IV Water Rocket Launcher is a premium, easy-to-assemble metal launcher designed for soda bottle rockets. Featuring a 125 PSI safety valve and aerodynamic StratoFins, it can propel 2-liter bottles over 350 feet. Compatible with various bottle sizes and fully upgradeable, this STEM-focused kit combines thrilling outdoor fun with educational value, ideal for kids 13+ under supervision and adults. ## Description desertcart.com: Relationshipware StratoLauncher IV Water Rocket Launcher + StratoFins : Arts, Crafts & Sewing Review: Literally a blast... - This is a very nice, high-quality set. It's a bit pricey, so I held off purchasing this for quite some time, but with the recent hot weather, this is a great treat for playing at the park with my son. The video directions could use a slight correction since the release cable was a bit tricky to attach they way it was shown... it was much easier to attach the cable on the base end first and then to the hand caliper. Also, the release cable holder on the base was also pre-attached upside down, so that had to be reattached properly using a tiny hex wrench. Otherwise, a very nice high-quality water rocket launcher. Our maiden launch at 90 PSI took our 1-liter bottle to amazing heights... we almost lost our rocket since we weren't in a large enough space for recovery. Make sure you only use this in a very large, wide open space such as a large park or field. Fun to watch for kids 5 and up. This is a great toy and can be educational for older kids 12 and up if you discuss the principles of propulsion and use some simple tools to calculate the height at apogee. NASA has a nice little website where you can print-out materials to create tools to do just that. Due to the higher air pressures this kit can attain, it is best actually operated by older kids 13+ under adult supervision or by adults. Have fun! Review: Great Toy! - We bought the Water Rocket Launcher for our granddaughter. She loves it! It will launch the large 2 liter bottles as well as smaller bottles. We are having lots of fun trying out different bottles & various amounts of water & air pressure for the launch. ## Features - Easy to assemble metal water rocket launcher with a 125 PSI safety valve. Rocket will NOT fly straight without an aerodynamic nose cone made from a second soda bottle and use only 1 cup (200 ml) of water. - Kit includes our Gen 4 StratoLauncher + StratoFins (screw-on water rocket fins) + fill funnel. Watch assembly video on this listing at the end of the pictures. - StratoLauncher IV will propel a 2 liter plastic (PET) soda pop bottle over 350 ft. in the sky. Watch the last minute of the assembly video for launch procedure. - Supports most .5L, 1L, 1.25L, 1.5L, 2L soda bottles @ air pressures as low as 15 PSI up to 120 PSI. - Kit is fully upgradeable, expandable, & can be accessorized into a complete launching system for STEM. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071LRLBX9 | | Additional Features | Portable | | Age Range Description | Kid | | Are Batteries Required | No | | Batteries are Included | No | | Brand Name | Relationshipware | | Color | Black | | Customer Reviews | 4.3 4.3 out of 5 stars (193) | | Educational Objective | STEM learning | | Included Components | StratoLauncher, StratoFins, collapsible water fill funnel | | Indoor Outdoor Usage | Outdoor | | Is Assembly Required | Yes | | Item Dimensions | 8 x 7 x 10 inches | | Item Weight | 2 Pounds | | Manufacturer | Relationshipware | | Manufacturer Maximum Age (MONTHS) | 1188.00 | | Manufacturer Minimum Age (MONTHS) | 168.00 | | Manufacturer Part Number | LCR-5 | | Material Type | aluminum, stainless steel, brass, ABS plastic | | Model Name | LCR-5 | | Model Number | LCR-5 | | Number of Items | 1 | | Number of Players | 1 | | Operation Mode | Manual | | Power Source | Compressed Air | | Size | 7 x 8 x 10 inches | | Theme | Space | | Toy Vehicle Form | Rocket | | UPC | 700220319066 | ## Images ![StratoLauncher IV Water Rocket Launcher + StratoFins - Image 1](https://m.media-amazon.com/images/I/61JUNVZEtzL.jpg) ## Questions & Answers **Q: Can you use without water?** A: Yes, our StratoLauncher IV is designed to use with various fuel sources such as: air only or air and water, as well as dry ice and water although the latter can be a little tricky and dangerous. Not recommended and messy would be things like air and flour, cream of wheat, and similar dry cereals although these do not perform that well and leave a mess behind unlike just air or water. **Q: Is there a way to fit a remote release? Also, what kind of altitude meter can I get? Thanks** A: We have plans to develop a remote release this year, but that may take some time. Currently the 10 ft. cable is as remote as it gets. We will be coming out with a cable joiner in the next month or two that will connect another 10 ft. cable making it 20 ft. and it should allow multiples of these if you want to be even further away. Concerning altimeters watch the video link below about mounting an altimeter to a water rocket: https://youtu.be/26iMMAWt3gw Under the description you will find a link where these altimeters are available. **Q: what is the bottle of blue liquid for?** A: It is 242 Blue Removable Threadlocker for sealing all the fittings that screw into the launcher body. You can see the application of it in the assembly video that is linked in the instruction PDF and it has been uploaded on Amazon as well. It does take 24 hours to cure and harden before you can use the launcher, so plan accordingly. **Q: How many nozzles come in a kit? (Not including strato fins)** A: Only 1 nozzle comes in the kit, which can be used on the StratoFins or used without the StratoFins. The StratoFins do not come with a nozzle, since they were designed and sold to be used on most any water rocket launcher whether it uses a nozzle or not. If you need additional nozzles they can be purchased on our site (StratoFins.com). ## Customer Reviews ### ⭐⭐⭐⭐⭐ Literally a blast... *by W***E on July 9, 2024* This is a very nice, high-quality set. It's a bit pricey, so I held off purchasing this for quite some time, but with the recent hot weather, this is a great treat for playing at the park with my son. The video directions could use a slight correction since the release cable was a bit tricky to attach they way it was shown... it was much easier to attach the cable on the base end first and then to the hand caliper. Also, the release cable holder on the base was also pre-attached upside down, so that had to be reattached properly using a tiny hex wrench. Otherwise, a very nice high-quality water rocket launcher. Our maiden launch at 90 PSI took our 1-liter bottle to amazing heights... we almost lost our rocket since we weren't in a large enough space for recovery. Make sure you only use this in a very large, wide open space such as a large park or field. Fun to watch for kids 5 and up. This is a great toy and can be educational for older kids 12 and up if you discuss the principles of propulsion and use some simple tools to calculate the height at apogee. NASA has a nice little website where you can print-out materials to create tools to do just that. Due to the higher air pressures this kit can attain, it is best actually operated by older kids 13+ under adult supervision or by adults. Have fun! ### ⭐⭐⭐⭐⭐ Great Toy! *by C***C on October 11, 2025* We bought the Water Rocket Launcher for our granddaughter. She loves it! It will launch the large 2 liter bottles as well as smaller bottles. We are having lots of fun trying out different bottles & various amounts of water & air pressure for the launch. ### ⭐⭐⭐⭐ Nice rocket *by E***W on December 22, 2018* Worked better than expected. Relatively easy to assemble and launch. Took off over 200 feet! Durable and reusable. I think you could get alot of parts or rig parts from a hardware store or bicycle shop if necessary. Timely delivery. Will require 2 soda bottles 2 liters. Issues that I came across was it kept leaking at all of the fittings which made it difficult to keep pressure. The instructions mention not to add anymore sealant than what was provided. I think because the threads were so thin. Each fitting came with red sealant already applied. The kit should have come with more. This one did not come with a parachute which at the heights it will go should have because once it hit the ground it was finished. Second launch curved from what believe to be damage from the launch prior. Ground pins to keep the base stable would have been nice. It also came with no instructions. You had to go online for them. I don't know why they couldn't put a simple piece of paper in the box. Extra fins would also be nice seeing after it slams back into earth it increases the chances of them breaking. Would still recommend just needs some improvements. This is not an elementary kit. Would say more advanced. ## Frequently Bought Together - Relationshipware StratoLauncher IV Water Rocket Launcher + StratoFins - StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller - Relationshipware StratoChute 24" Red Rip-Stop Nylon Parachute for Water or Model Rocket --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins](https://www.desertcart.it/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-13*