--- product_id: 306907211 title: "StratoLauncher IV Deluxe Tilting Water Rocket Launcher + StratoFins Kit | StratoLauncher IV will propel a 2-liter plastic (PET) soda bottle over 350 ft. in the sky" brand: "relationshipware" price: "€ 225.69" currency: EUR in_stock: true reviews_count: 5 category: "Relationshipware" url: https://www.desertcart.hr/products/306907211-stratolauncher-iv-deluxe-tilting-water-rocket-launcher-stratofins-kit-stratolauncher store_origin: HR region: Croatia --- # Universal nozzle fits most bottles 350+ ft max altitude 125 PSI safety valve StratoLauncher IV Deluxe Tilting Water Rocket Launcher + StratoFins Kit | StratoLauncher IV will propel a 2-liter plastic (PET) soda bottle over 350 ft. in the sky **Brand:** relationshipware **Price:** € 225.69 **Availability:** βœ… In Stock ## Summary > πŸš€ Elevate your backyard launches to stratospheric status! ## Quick Answers - **What is this?** StratoLauncher IV Deluxe Tilting Water Rocket Launcher + StratoFins Kit | StratoLauncher IV will propel a 2-liter plastic (PET) soda bottle over 350 ft. in the sky by relationshipware - **How much does it cost?** € 225.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/306907211-stratolauncher-iv-deluxe-tilting-water-rocket-launcher-stratofins-kit-stratolauncher) ## 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 - β€’ **Control & Comfort:** Tilting ball head and remote release lever keep you safe and in command from 10 feet away. - β€’ **Built-In Safety First:** 125 PSI safety valve ensures worry-free pressurization every launch. - β€’ **Sky-High Launch Power:** Propel 2L soda bottles over 350 feet with precision and power. - β€’ **STEM-Ready & Upgradeable:** Expand your launcher with add-ons for endless educational fun and customization. - β€’ **Universal Fit & Easy Assembly:** Screw-on nozzle and included tools make setup a breeze for all bottle sizes. ## Overview The StratoLauncher IV Deluxe is a premium water rocket launcher kit designed for STEM enthusiasts and hobbyists. Crafted from durable aluminum, stainless steel, brass, and ABS plastic, it safely propels 2-liter soda bottles over 350 feet using only water and compressed air up to 125 PSI. Featuring a universal screw-on nozzle, tilting ball head, pressure gauge, and quick-release alloy mechanism, it supports multiple bottle sizes and offers easy assembly with included tools. This upgradeable system combines thrilling outdoor fun with educational value, perfect for professionals and families seeking an engaging, hands-on experience. ## Description Our StratoLauncher IV Deluxe kit includes a water rocket launcher made of aluminum, SS, durable plastic, & brass parts fitted with a tilting ball head, pressure gauge, & alloy quick release, StratoFins, & collapsible water fill funnel. Assembly is quick & easy with no further adjustments required regardless if you use our StratoFins or your own homemade rocket or FTC (Fluorescent Tube Cover) rocket thanks to the screw-on nozzle. Employing a nozzle makes this a universal launcher for most any style water rocket & eliminates problems like bottles not fitting a launch tube, O-rings wearing out, or accidental launches. The restricted nozzle facilitates lift offs that are 3 6 times slower (depending on PSI) than typical water rocket launchers enabling you to see the blast off and yet the nozzle rocket will fly equal to or higher in altitude. Also, the nozzle requires only 1 cup of water per launch for optimum performance although you are free to experiment. StratoLauncher IV Deluxe ships unassembled with a QR code on the box label that you can scan with your smartphone to view a PDF containing assembly instructions, launch procedures, upgrade kits, videos, and future accessories. NO additional materials are required for assembly, but you will need an adjustable wrench (or a 14mm wrench), 4 & 5mm hex wrench, and Phillips head screwdriver. Our StratoLauncher IV Deluxe will enable you to propel a 2 liter soda bottle over 350 ft. into the sky using only water and compressed air from a bicycle pump. Fuel (water & air) is essentially free and readily available allowing countless launches without additional expense. You control when the launch occurs by squeezing the black lever & releasing the lock at the end of the cable from a safe distance of 10 ft. & out of the splash zone. StratoLauncher IV comes in 3 models: Standard, Deluxe, and Ultimate. Any of them can be upgraded to add features & all come with a 125 PSI safety valve to prevent exploding bottles while pressurizing. Review: Who knew water bottles could be this cool? - The launcher allows you to build and enjoy a relatively safe yet awesome rocket experience. The instructions are a little difficult to follow, but the videos are great. It took about 30 - 45 minutes to assemble the launcher and prepare the soda bottles, and tie up the optional parachute. My first trial sent the rocket a little over 70’ (give or take) and that was only at 1/3 the max pressure (125 psi)! That was A LOT higher than I was expecting, so be careful of your surroundings, mindful of the wind speed and direction at height, and make sure you have a large enough recovery area (empty baseball field or park would be ideal). The parachute assembly deployed properly and brought everything easily back to the ground without damage. Watch out for trees if the wind is blowing. I can’t wait to get out again with my grandson and see how high we can go. Review: Water Bottle Rocket - Works great but material could be a bit tougher as one fin broke off after about the 15 run....... ## 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 StratoLauncher IV, StratoFins, tilting ball head, pressure gauge, alloy QRelease + fill funnel. Watch assembly video on this listing at the end of the pictures. - StratoLauncher IV Deluxe 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 | B071233ZB8 | | Age Range Description | Kid | | Age range (description) | Kid | | Best Sellers Rank | #207,741 in Toys ( See Top 100 in Toys ) #83 in Spacecraft Model Building Kits | | Brand | Relationshipware | | Brand Name | Relationshipware | | Customer Reviews | 4.4 out of 5 stars 109 Reviews | | Educational Objective | STEM | | Included Components | Rocket Launcher | | Is Assembly Required | Yes | | Item Dimensions | 20.3 x 17.8 x 30.5 centimeters | | Item Weight | 1.25 kg | | Item dimensions L x W x H | 20.3 x 17.8 x 30.5 centimeters | | Item weight | 1.25 kg | | Manufacturer | Relationshipware | | Manufacturer Maximum Age (MONTHS) | 1188 | | Manufacturer Minimum Age (MONTHS) | 168.00 | | Manufacturer Part Number | LCR-6 | | Material Type | aluminum, stainless steel, brass, ABS plastic | | Set Name | Relationshipware StratoLauncher IV Deluxe Tilting Water Rocket Launcher + StratoFins Kit | | Size | L | | Theme | Vehicle | | UPC | 700220319073 | | Unit Count | 1 Set | ## Product Details - **Age range (description):** Kid - **Brand:** Relationshipware - **Item dimensions L x W x H:** 20.3 x 17.8 x 30.5 centimeters - **Size:** L - **Theme:** Vehicle ## Images ![StratoLauncher IV Deluxe Tilting Water Rocket Launcher + StratoFins Kit | StratoLauncher IV will propel a 2-liter plastic (PET) soda bottle over 350 ft. in the sky - Image 1](https://m.media-amazon.com/images/I/617x6E2BVFL.jpg) ## Questions & Answers **Q: Is there an optimal psi level?** A: No, there is not an optimal PSI level for the StratoLauncher IV. The range is 15 PSI to 120 PSI on all 3 models, Standard, Deluxe, and Ultimate. A lot depends on the size field you are launching on. The higher the PSI the larger the field needs to be especially if there is any wind (8 - 15 MPH) and you are using a parachute. Wind can cause a lot of drift and you might lose your rocket to a tree or not find it. Most people are happy in the 40 - 80 PSI range. At 100 - 120 PSI you are stressing the bottle a lot and it would need to be replaced more frequently as the stress points will eventually give way after a few dozen launches at that consistent high pressure. Below 100 PSI the bottle will last a long time. Also, if one is pressurizing with a bicycle pump you will get tired of pumping up to 100 PSI and higher over time. Pumping up to 40 - 80 PSI is not that much work. Most children will not be able to pump up much past 80 PSI and certainly not very often. One can have a lot of fun in the 40 - 80 PSI range because the rocket flies plenty high at those pressures and one can do it over and over without a lot of effort. This lower PSI range is also good when using a parachute because above 80 PSI you are apt to lose your parachute rocket if the winds are any higher than 4 MPH. I hope these comments and suggestions prove helpful to your. **Q: Where can I purchase additional nozzles?** A: Additional nozzles are available on our site https://www.stratofins.com Also, that information is available on the product box, online manuals, and the included business card. You will find a host of replacement parts and upgrade kits there as well. **Q: If I'm at the beach, can I use salt water?** A: Although salt water would work in the StratoLauncher IV, I would not recommend it because the salt water would be corrosive to the metal parts. Probably not a problem on the aluminum, but the other brass and metal parts would suffer and probably affect the air pressure gauge if it gets inside of there. Furthermore, the presence of sand many cause problems, because that stuff gets everywhere and would invariably cut away on plastic connections (nozzle) and may create leaks from abrasion or malfunctioning. I suppose if you were extremely careful and rinsed the nozzle before each insertion into the launcher and carefully rinsed the entire launcher with fresh water shortly after you left the beach you might get away with it, but I would not recommend it. An additional problem would be the flight itself. Generally beaches are windy places and these light water rockets prefer launching in less than 10 MPH (0 to 4 MPH is really ideal). Other than that beaches sound like a great place to launch given the wide open spaces probably without trees and potential soft landings on water or sand, but I think it is a recipe for shortening the life of the StratoLauncher IV. It will function without water using just air, but does not fly near as high, but once again the sand and wind are going to be issues at the beach where I don't think you will be pleased with the results. **Q: Not fitting onto Bike pump at all. How is this thing supposed up actually launch anything?!** A: All our StratoLauncher IV models come with a standard Schrader valve as one would find on most bicycle or car tires. Consequently a standard bike pump will fit our valve. If your bike pump only has a Presta valve as found on high pressure road bikes, then it will not fit the Schrader valve. Many bike pumps have a head for both types of valves. Per our assembly instructions the Schrader valve is normally located under the pressure gauge on the launcher body. Installing the pressure gauge at a 25 degree angle as we indicate can make it easier to attach a bike pump to the Schrader valve underneath it. If the head on you bike pump is too large to fit under the pressure gauge, then you might switch the Schrader and safety valve positions on the launcher body. If you are still having issues, please contact us directly via the email on the kit box or included business card. We will help resolve any issues. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Who knew water bottles could be this cool? *by M***L on 20 July 2025* The launcher allows you to build and enjoy a relatively safe yet awesome rocket experience. The instructions are a little difficult to follow, but the videos are great. It took about 30 - 45 minutes to assemble the launcher and prepare the soda bottles, and tie up the optional parachute. My first trial sent the rocket a little over 70’ (give or take) and that was only at 1/3 the max pressure (125 psi)! That was A LOT higher than I was expecting, so be careful of your surroundings, mindful of the wind speed and direction at height, and make sure you have a large enough recovery area (empty baseball field or park would be ideal). The parachute assembly deployed properly and brought everything easily back to the ground without damage. Watch out for trees if the wind is blowing. I can’t wait to get out again with my grandson and see how high we can go. ### ⭐⭐⭐ Water Bottle Rocket *by B***H on 2 November 2019* Works great but material could be a bit tougher as one fin broke off after about the 15 run....... ### ⭐⭐⭐⭐⭐ Possibly the worlds best Water Rocket *by D***E on 2 January 2026* I will start my review with Wow Wow Wow....what an awesome product. This seller makes a top quality product, it goes way beyond a toy, it is a precision machined work of art and it launchers a water rocket like it was a fire work. The kids just love it! In my opinion this is the best water rocket launcher in the World and I am delighted I found it on Amazon and I feel privileged to own one. ## Frequently Bought Together - Relationshipware StratoLauncher IV Deluxe Tilting Water Rocket Launcher + StratoFins Kit - 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/306907211-stratolauncher-iv-deluxe-tilting-water-rocket-launcher-stratofins-kit-stratolauncher](https://www.desertcart.hr/products/306907211-stratolauncher-iv-deluxe-tilting-water-rocket-launcher-stratofins-kit-stratolauncher) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-07*