--- product_id: 43502063 title: "StratoLauncher IV Water Rocket Launcher + StratoFins Kit" brand: "relationshipware" price: "€ 168.30" currency: EUR in_stock: true category: "Relationshipware" url: https://www.desertcart.gr/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins-kit store_origin: GR region: Greece --- # Upgradeable & expandable kit 350+ ft max flight 125 PSI safety valve StratoLauncher IV Water Rocket Launcher + StratoFins Kit **Brand:** relationshipware **Price:** € 168.30 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your weekend fun with the ultimate water rocket experience! ## Quick Answers - **What is this?** StratoLauncher IV Water Rocket Launcher + StratoFins Kit by relationshipware - **How much does it cost?** € 168.30 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/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 - • **Modular & Expandable:** Fully upgradeable launcher system with accessories to fuel your next-level rocket adventures. - • **Sky-High Launch Power:** Propels 2L soda bottles over 350 feet for epic backyard shows. - • **Precision Aerodynamics:** StratoFins and custom nose cones ensure straight, stable flights every time. - • **STEM-Ready Engineering:** Perfect hands-on learning tool for propulsion physics and DIY rocket science. - • **Built for Safety & Control:** 125 PSI safety valve and adjustable air pressure from 15 to 120 PSI for secure launches. ## Overview The StratoLauncher IV Water Rocket Launcher + StratoFins Kit is a high-quality, easy-to-assemble metal launcher designed for soda bottle rockets. It features a 125 PSI safety valve and supports air pressures from 15 to 120 PSI, propelling 2-liter bottles over 350 feet. The kit includes aerodynamic screw-on fins and a fill funnel, making it ideal for STEM education and outdoor fun for ages 14 and up. Fully upgradeable and perfect for mastering propulsion principles with family or friends. ## 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 | 4.3 out of 5 stars 194 Reviews | | Educational Objective | STEM | | Included Components | StratoLauncher, StratoFins, collapsible water fill funnel | | 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 Number | LCR-5 | | 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) ![StratoLauncher IV Water Rocket Launcher + StratoFins Kit - Image 2](https://m.media-amazon.com/images/I/617fuMIsHFL.jpg) ![StratoLauncher IV Water Rocket Launcher + StratoFins Kit - Image 3](https://m.media-amazon.com/images/I/71VSGxCT5QL.jpg) ![StratoLauncher IV Water Rocket Launcher + StratoFins Kit - Image 4](https://m.media-amazon.com/images/I/61rcXOPQPLL.jpg) ![StratoLauncher IV Water Rocket Launcher + StratoFins Kit - Image 5](https://m.media-amazon.com/images/I/61DnMktVe5L.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.gr/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins-kit](https://www.desertcart.gr/products/43502063-stratolauncher-iv-water-rocket-launcher-stratofins-kit) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-18*