---
product_id: 308166301
title: "StratoLauncher IV Water Rocket Launcher + StratoFins"
brand: "relationshipware"
price: "₨49814"
currency: LKR
in_stock: true
reviews_count: 5
category: "Relationshipware"
url: https://www.desertcart.lk/products/308166301-stratolauncher-iv-water-rocket-launcher-stratofins
store_origin: LK
region: Sri Lanka
---

# Universal screw-on nozzle 350+ ft max altitude 125 PSI safety valve StratoLauncher IV Water Rocket Launcher + StratoFins

**Brand:** relationshipware
**Price:** ₨49814
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your summer fun with precision-powered water rocket thrills!

## Quick Answers

- **What is this?** StratoLauncher IV Water Rocket Launcher + StratoFins by relationshipware
- **How much does it cost?** ₨49814 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/308166301-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

- • **Precision Safety:** Built-in 125 PSI valve ensures worry-free, controlled pressure every launch.
- • **STEM-Ready Design:** Upgradeable kit perfect for hands-on learning in physics and engineering.
- • **Sky-High Launches:** Propel 2L soda bottles over 350 feet for epic backyard shows.
- • **Effortless Assembly:** Quick setup with included QR-guided video instructions—launch in no time.
- • **Universal Compatibility:** Screw-on nozzle fits most soda bottles from 0.5L to 2L—no more fit issues.

## Overview

The StratoLauncher IV is a premium water rocket launcher kit crafted from aluminum, stainless steel, brass, and durable plastics. It features a 125 PSI safety valve and a universal screw-on nozzle compatible with most soda bottles (0.5L to 2L). Designed for easy assembly with QR code video guidance, it propels rockets over 350 feet using just 1 cup of water and compressed air. Fully upgradeable and STEM-focused, it offers a safe, educational, and exhilarating experience for teens and adults alike.

## Description

Our StratoLauncher IV kit includes a water rocket launcher made of aluminum, stainless steel, durable plastic, & brass parts, a set of 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 and eliminates problems such as bottles not fitting over a launch tube, O-rings wearing out, or accidental launches due to falling collars. 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 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, & a Phillips head screwdriver. Our StratoLauncher IV 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 or an air compressor. 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 and releasing the lock at the end of the cable from a safe distance of 10 ft. and out of the splash zone. StratoLauncher IV comes in 3 models: Standard, Deluxe, and Ultimate. Any of them can be upgraded to add additional features and all come with a 125 PSI safety valve to prevent exploding bottles while pressurizing.

Review: 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: Instructions faciles à suivre, pièces de qualité et résultat franchement impressionnants du premier coup. Attention aux journées venteuses! La fusée va vraiment très haut et si vous utilisez le parachute, elle peut facilement se retrouver à plus de 500 m de sa rampe de lancement et atterrir sur un toit de maison ou dans un arbre.

## 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 |
| Assembly Required | Yes |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #153,445 in Toys ( See Top 100 in Toys ) #46 in Spacecraft Model Building Kits |
| Color | Black |
| Customer Reviews | 4.1 4.1 out of 5 stars (184) |
| Date First Available | 27 June 2017 |
| Educational Objective(s) | STEM learning |
| Item model number | LCR-5 |
| Language | English |
| Manufacturer recommended age | 14 years and up |
| Material Type(s) | aluminum, stainless steel, brass, ABS plastic |
| Number of Puzzle Pieces | 18 |
| Product Dimensions | 20.32 x 17.78 x 25.4 cm; 907.18 g |

## 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

### ⭐⭐⭐⭐⭐ Review
*by W***E on 9 July 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!

### ⭐⭐⭐⭐⭐ Review
*by L***D on 6 April 2021*

Instructions faciles à suivre, pièces de qualité et résultat franchement impressionnants du premier coup. Attention aux journées venteuses! La fusée va vraiment très haut et si vous utilisez le parachute, elle peut facilement se retrouver à plus de 500 m de sa rampe de lancement et atterrir sur un toit de maison ou dans un arbre.

### ⭐⭐⭐⭐⭐ Review
*by D***L on 22 January 2021*

Bought it for a school project. Very sturdy and will use it for years to come

## 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

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-20*