--- product_id: 43502063 title: "StratoLauncher IV Water Rocket Launcher + StratoFins Kit" brand: "relationshipware" price: "€ 156.96" currency: EUR in_stock: true category: "Relationshipware" url: https://www.desertcart.sk/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins-kit store_origin: SK region: Slovakia --- # 350+ ft max flight Upgradeable & expandable kit 125 PSI safety valve StratoLauncher IV Water Rocket Launcher + StratoFins Kit **Brand:** relationshipware **Price:** € 156.96 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your STEM game with every launch—don’t just watch the sky, own it! ## Quick Answers - **What is this?** StratoLauncher IV Water Rocket Launcher + StratoFins Kit by relationshipware - **How much does it cost?** € 156.96 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins-kit) ## 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 - • **Aerodynamic Mastery:** Includes StratoFins for stable, straight flights—because wobble is so last season. - • **STEM-Ready Innovation:** Fully upgradeable and expandable, perfect for hands-on learning and creative customization. - • **Sky-High Launch Power:** Propels 2L soda bottles over 350 feet for epic backyard flights. - • **Precision Pressure Control:** Built-in 125 PSI safety valve ensures safe, consistent launches every time. - • **Effortless Assembly & Launch:** Easy-to-follow video guide and included fill funnel make setup a breeze. ## Overview The StratoLauncher IV Water Rocket Launcher + StratoFins Kit is a premium, easy-to-assemble water rocket system designed for ages 14 and up. Featuring a robust 125 PSI safety valve and aerodynamic screw-on fins, it propels standard soda bottles up to 350 feet. This aluminum and stainless steel launcher supports multiple bottle sizes and is fully upgradeable, making it an ideal STEM educational tool that combines fun, science, and engineering in one sleek package. ## Description desertcart.com: Relationshipware StratoLauncher IV Water Rocket Launcher + StratoFins Kit : Toys & Games ## 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 | | Age Range Description | 14 - 99 years | | Brand Name | Relationshipware | | Customer Reviews | 4.2 4.2 out of 5 stars (197) | | Educational Objective | STEM | | Included Components | StratoLauncher, StratoFins, collapsible water fill funnel | | Item Dimensions | 8 x 7 x 10 inches | | Item Weight | 2 pounds | | Manufacturer | Relationshipware | | Manufacturer Part Number | LCR-5 | | Manufacturer recommended age | 14 years and up | | Material Type | aluminum, stainless steel, brass, ABS plastic | | Model Number | LCR-5 | | Number of Items | 1 | | Number of Packs | 1 | | Set Name | StratoLauncher IV Water Rocket Launcher + StratoFins Kit | | Size | 7 x 8 x 10 inches | | Theme | Space | | UPC | 700220319066 | ## Images ![StratoLauncher IV Water Rocket Launcher + StratoFins Kit - 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). ## 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.sk/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins-kit](https://www.desertcart.sk/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins-kit) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-08*