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Relationshipware StratoLauncher IV Water Rocket Launcher + StratoFins

4.3 4.3 out of 5 stars 176 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
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Purchase options and add-ons

  • 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.

Additional Details

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Frequently bought together

Relationshipware StratoLauncher IV Water Rocket Launcher + StratoFins
$66.00
Get it as soon as Monday, May 6
In Stock
Sold by Relationshipware LLC and ships from Amazon Fulfillment.
+
StratoFins Screw-on Water Rocket Fins - Compatible with 2 Liter Bottles or Smaller
$10.99
Get it as soon as Monday, May 6
In Stock
Sold by Relationshipware LLC and ships from Amazon Fulfillment.
+
Relationshipware StratoChute 24" Red Rip-Stop Nylon Parachute for Water or Model Rocket
$17.95
Get it as soon as Monday, May 6
In Stock
Sold by Relationshipware LLC and ships from Amazon Fulfillment.
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Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Relationshipware StratoLauncher IV Water Rocket Launcher + StratoFins

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Important information

Safety Information

Operate StratoLauncher with extreme care and only under adult supervision. Relationshipware LLC and its members are NOT RESPONSIBLE for any injury or loss of property to any person suffered while operating our StratoLauncher IV with or without our StratoFins.

Legal Disclaimer

Operate StratoLauncher with extreme care and only under adult supervision. Relationshipware LLC and its members are NOT RESPONSIBLE for any injury or loss of property to any person suffered while operating our StratoLauncher IV with or without our StratoFins.

Product Description

StratoLauncher IV is available in 3 models: Standard, Deluxe, and Ultimate

Available in 3 Models

Our StratoLauncher IV, water rocket launcher is available in 3 models: Standard, Deluxe, and Ultimate. All of them perform the same and can be upgraded to add additional features and all come with a 125 PSI safety valve to prevent exploding bottles while pressurizing.

  • Standard - plastic quick connector, no pressure gauge, does not tilt
  • Deluxe - metal quick connector, air pressure gauge, tilting ball head
  • Ultimate - same as Deluxe plus Q-connect water fill system made of 4 parts to connect a tank sprayer

Our complete launcher kits will enable you to propel a 2-liter plastic (PET*) soda pop bottle over 350 ft. into the sky using only water and compressed air from a bicycle pump or an air compressor.

View the 3 videos for this listing that cover benefits, assembly, and launch procedure.

StratoLauncher IV Standard nozzle efficiency

Nozzle Efficiency

Requires only 200 ml or less of water to launch a 2-liter soda bottle from the StratoLauncher IV. This means carrying less water onto the field. Also, it functions very well with Air Only. More water can be used, but that will require a rail system or a narrow diameter rocket like an FTC (fluorescent tube cover) rocket.

nozzle enables launching various size bottles, glider, rocket car, and FTC rocket

Nozzle Versatility

Supports 5 different soda bottle sizes (0.5L, 1L 1.25L, 1.5L and 2L) @ air pressures as low as 15 PSI up to 120 PSI. Plus, launch homemade rockets, spliced versions, FTC rockets, gliders, and rocket cars. Although our StratoFins yield the best results, the StratoLauncher IV was designed to enable students and family members to create their own fin and rocket designs that will work merely by screwing on the black nozzle.

Connect 2 or more Ultimate for classes or STEM events

Expandable

Connect several StratoLauncher IV units together for large classes or STEM events. Fuel with a single water source (tank sprayer or garden hose) and pressurize with a single air source (bicycle pump, air compressor, or scuba tank) to get through a large field of participants in a short and safe period of time.

StratoLauncher IV is upgradeable

Upgradeable

Several upgrades are available to enhance your StratoLauncher IV water rocket launcher.

  • Deluxe Upgrade
  • Ultimate Upgrade
  • 10 ft. Hose Extension
  • 10 ft. Compressor Connect
  • 48 in. Rail System

Product guides and documents

User Manual (PDF)

Looking for specific info?

Customer reviews

4.3 out of 5 stars
4.3 out of 5
176 global ratings

Customers say

Customers like the quality, fun and height of the non riding toy vehicle. For example, they mention it works well, it's exciting and it goes very high. That said, opinions are mixed on the ease of assembly.

AI-generated from the text of customer reviews

38 customers mention28 positive10 negative

Customers like the quality of the toy vehicle. They say it performs great, the launcher works well, and is quick to build. Some mention that the launch platform is really good. Overall, most are happy with the quality and functionality of the product.

"This rocket launcher is so cool. I bought it as a gift for my nephews a couple years ago but I realized they were too young for it at the time...." Read more

"...Great product, great fun, and great support!!!" Read more

"Worked better than expected. Relatively easy to assemble and launch. Took off over 200 feet! Durable and reusable...." Read more

"...I didn't even read the instructions, and it worked perfectly." Read more

19 customers mention19 positive0 negative

Customers find the toy fun for kids. They say it's a great project for a science fair and great for activities. Customers also mention that the launch is so much fun.

"...The launch is sooooo much fun. We launched it for hours with the neighbor kids and each time was so great...." Read more

"...Great product, great fun, and great support!!!" Read more

"Maybe it's not a kid's toy, but it sure was fun for all of us...." Read more

"...Its is super fun for the kids..." Read more

7 customers mention7 positive0 negative

Customers are happy with the height of the non riding toy vehicle. They say it goes very high, nearly out of sight, quickly. Some customers even say it achieves the advertised height when pumped to 125psi, and took off over 200 feet.

"...so the rocket want land on a neighbors house or car, as it goes up very high...." Read more

"...Relatively easy to assemble and launch. Took off over 200 feet! Durable and reusable...." Read more

"This is well built and goes insanely high. It’s a blast and a workout if pumping manually...." Read more

"This thing is a blast to launch. It goes so high you need to be careful with the winds at higher altitude because I’ve launched this straight up..." Read more

11 customers mention6 positive5 negative

Customers are mixed about the ease of assembly of the toy vehicle. Some mention it's relatively easy to assemble and launch, while others say it came with absolutely no instructions.

"...I'm handy so putting it together was a breeze...." Read more

"...Watching the YouTube video is super helpful. It doesn’t come with instructions but rather you can scan the QR code on the box and it takes you to a..." Read more

"...around a tool box, and basic home repairs, then this will be easy to put together. I didn't even read the instructions, and it worked perfectly." Read more

"...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...." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the air leakage of the toy vehicle. They mention that it leaks at all of the fittings and makes it difficult to keep.

"...Issues that I came across was it kept leaking at all of the fittings which made it difficult to keep pressure...." Read more

"...that you need to buy a bicycle pump so that’s an added expense also it leaks air so they don’t fly very high." Read more

"The launcher is incapable of functioning due to air leaking where the nozzle locks. Any air that is pumped into the launcher leaves immediately...." Read more

Broke after 3rd use
1 Star
Broke after 3rd use
A fin broke after the 3rd launch when it landed on soft soil. My son was devastated as he had waited a couple weeks for this product as a reward he had earned. The first 3 launches were awesome. Not so much fun now.
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Top reviews from the United States

Maisa Morrar
5.0 out of 5 stars Would buy it again!
Reviewed in the United States on April 7, 2020
Verified Purchase
This rocket launcher is so cool. I bought it as a gift for my nephews a couple years ago but I realized they were too young for it at the time. They are 9 and 7 now which is a good age.

On building: at first building the launcher seemed a bit daunting, but it really wasn’t that hard. It definitely needs adult supervision, though I think older kids could build it on their own. Watching the YouTube video is super helpful. It doesn’t come with instructions but rather you can scan the QR code on the box and it takes you to a site that lets you download the instructions and there’s a link on the instructions to YouTube video.

On launching: I think the youngest age that can launch on their own is about 7. The launch is sooooo much fun. We launched it for hours with the neighbor kids and each time was so great. They recommend launching in a big open field which is definitely best but we launched in front of the house and it was fine. I definitely recommend this for young kids to help develop their minds and get them to understand a little bit of science. I would buy it again.
One person found this helpful
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Andrew R
5.0 out of 5 stars Flat out awesome!
Reviewed in the United States on July 27, 2019
Verified Purchase
This water rocket launcher blew our minds during that first launch! We couldn't believe it when we saw that rocket take off into the sky. My kids loved it. I played with a neighbors water rocket back in the 70s so this brought back memories for me. I'm handy so putting it together was a breeze. You should really find an open field for this launcher so the rocket want land on a neighbors house or car, as it goes up very high. Customer service from Relationshipware is also excellent and very responsive! Great product, great fun, and great support!!!
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Eric W
4.0 out of 5 stars Nice rocket
Reviewed in the United States on December 22, 2018
Verified Purchase
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.
2 people found this helpful
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David Price
5.0 out of 5 stars This thing is super cool.
Reviewed in the United States on August 19, 2020
Verified Purchase
Maybe it's not a kid's toy, but it sure was fun for all of us. I will say that taking the time to make a decent parachute or 2 will help preserve the fins. Or buy a parachute for a big estes model rocket. We made our own nose cones, out of poster board, in stead of another bottle. This made it fly straight and High. The poster board also allows the nose cone to easily separate, releasing the parachute. If you are able to find your way around a tool box, and basic home repairs, then this will be easy to put together. I didn't even read the instructions, and it worked perfectly.
One person found this helpful
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Robert
3.0 out of 5 stars Order spare parts with ur when ordering
Reviewed in the United States on May 21, 2021
Verified Purchase
The lower tail part /wings broke on the first lunch 😫 had order new ones 10 bucks. Its is super fun for the kids
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Adam
5.0 out of 5 stars Fun and Impressive
Reviewed in the United States on December 19, 2021
Verified Purchase
This is well built and goes insanely high. It’s a blast and a workout if pumping manually. For some reason it seems to go higher when I use a bicycle pump vs my air compressor to fill it. Maybe one of my gauges are bad. All the neighborhood kids love it when we bring it out.
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yaron weisman
5.0 out of 5 stars good experience with the service and product
Reviewed in the United States on May 23, 2022
Verified Purchase
As a science teacher I ordered the stratofin launcher and used it with my students. It works great and the delivery was on time
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JenO
1.0 out of 5 stars Broke after 3rd use
Reviewed in the United States on December 13, 2020
Verified Purchase
A fin broke after the 3rd launch when it landed on soft soil. My son was devastated as he had waited a couple weeks for this product as a reward he had earned. The first 3 launches were awesome. Not so much fun now.
Customer image
JenO
1.0 out of 5 stars Broke after 3rd use
Reviewed in the United States on December 13, 2020
A fin broke after the 3rd launch when it landed on soft soil. My son was devastated as he had waited a couple weeks for this product as a reward he had earned. The first 3 launches were awesome. Not so much fun now.
Images in this review
Customer image
Customer image
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Top reviews from other countries

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ALEJANDRO ROJAS
5.0 out of 5 stars Excelente
Reviewed in Mexico on March 29, 2023
Verified Purchase
Excelente producto
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Louis D
5.0 out of 5 stars Impressionnant!
Reviewed in Canada on April 6, 2021
Verified Purchase
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.
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D Seibel
5.0 out of 5 stars Works so well
Reviewed in Canada on January 22, 2021
Verified Purchase
Bought it for a school project. Very sturdy and will use it for years to come
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