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Relationshipware StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit

4.6 4.6 out of 5 stars 90 ratings
$100.00
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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 StratoLauncher IV, StratoFins, ball head, pressure gauge, QConnect w/valve (tank not included). Watch assembly video on this listing at the end of the pictures.
  • StratoLauncher IV Ultimate 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.

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Frequently bought together

Relationshipware StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit
$100.00
Get it as soon as Sunday, May 12
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 Sunday, May 12
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
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Sold by Relationshipware LLC and ships from Amazon Fulfillment.
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Product Warranty: For warranty information about this product, please click here

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Relationshipware StratoLauncher IV Ultimate Tilting Water Rocket Launcher + StratoFins Kit

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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.

requires only 200 ml of water to launch

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

4.6 out of 5 stars
4.6 out of 5
90 global ratings

Customers say

Customers like the value, quality and fun of the non riding toy vehicle. They mention that it's well thought out, well designed and made with high quality parts. They also say it'll last a long time and is fun to launch.

AI-generated from the text of customer reviews

11 customers mention8 positive3 negative

Customers like the sturdiness of the non riding toy vehicle. They mention it's well built, durable, and will last a long time.

"...but high-quality build and lots of fun!" Read more

"...The engineering is incredible. Solid parts. Design is really excellent. Somebody has really given this launcher a lot of thought...." Read more

"...2. Ironically, the name-sake StratoFins fins are ridiculously weak -- with or without the parachute (which cuts travel height to ~1/3), we had a fin..." Read more

"This launcher is super fun. It is very well made with metal components and boy can you get those water bottle rockets launched high!..." Read more

9 customers mention9 positive0 negative

Customers are satisfied with the quality of the non riding toy vehicle. They mention that it's well thought out, well designed, and made with high quality parts. Some say that the engineering is incredible and the design is excellent.

"...I was a initially hesitant about laying out $95 but the parts are all high quality...." Read more

"...The engineering is incredible. Solid parts. Design is really excellent. Somebody has really given this launcher a lot of thought...." Read more

"This is a GREAT set-up! Very nicely planned...." Read more

"High quality parts. Easy to assemble. The 1L bottle rocket that we flew was awesome. My kid and I loved it...." Read more

5 customers mention5 positive0 negative

Customers find the toy fun to play with and launch. They also say it's well built and sturdy.

"...It's lots of fun. Note: I elected to get a cheap $8 pressure sprayer rather than fiddle with the funnel. Also, make sure you use a good bicycle pump." Read more

"...but high-quality build and lots of fun!" Read more

"This launcher is super fun. It is very well made with metal components and boy can you get those water bottle rockets launched high!..." Read more

"...It's so much fun, we love it." Read more

5 customers mention5 positive0 negative

Customers appreciate the value of the non riding toy vehicle. They say it's worth every penny.

"...to get it to stay in position -- but it is super-useful, and worth the extra price!!2...." Read more

"...100psi you might never see your rocket again but boy is it worth every penny!" Read more

"...Best to just buy it, it's worth the money." Read more

"...Love it. Worth every penny." Read more

3 customers mention3 positive0 negative

Customers are impressed with the altitude of the toy vehicle. They say it shoots almost 100 feet into the air and definitely launches hundreds of feet.

"...It has great pressure and shoots almost 100 feet into the air. I was definitely impressed!" Read more

"...My kid and I loved it. Very fast take off and very impressed with the altitude reached. Looking forward to trying a 2L bottle...." Read more

"...We don't have an altimeter but this thing deffinatly launches hundreds of feet. It's so much fun, we love it." Read more

Okay start to a good kit. Half price elsewhere.
3 Stars
Okay start to a good kit. Half price elsewhere.
It's pretty good, leaked despite having sealant on the threads. Just use the supplied thread tape on everything and it will be fine. The fin adaptor leaks no matter what. It's okay under 50 psi, but anything over loses pressure rapidly.Overall this is a good kit that can be adapted. Be aware that the fins are fragile... looks like by design with sharp edges and strategic hollow channels in the right places for stress risers. I added a 45 degree adaptor for the pressure gauge. It will foul against the Schrader valve and not turn if it goes in straight as designed (see pic).Be aware that is is available elsewhere (deluxe kit) for less than half the price that I paid.Needs to come with another bottle adaptor... lose one bottle and you are finished.
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Top reviews from the United States

dlajammer
5.0 out of 5 stars Worth every penny...
Reviewed in the United States on June 1, 2020
Verified Purchase
I wanted something for the grand-kids to enjoy when they visit and they loved it. I was a initially hesitant about laying out $95 but the parts are all high quality. If you have done simple plumbing and adjusted brake cables on bicycles, you won't have any issues assembling it. It's lots of fun. Note: I elected to get a cheap $8 pressure sprayer rather than fiddle with the funnel. Also, make sure you use a good bicycle pump.
3 people found this helpful
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Person
5.0 out of 5 stars These are the water rockets you're looking for
Reviewed in the United States on October 4, 2023
Verified Purchase
What you dreamed of as a kid. You'll likely need the kit accessories to properly use the parachute (which is all but needed and tricky without an altitude release), but high-quality build and lots of fun!
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That weird lady
5.0 out of 5 stars My nephew was so excited!
Reviewed in the United States on April 14, 2024
Verified Purchase
If your kid is into rockets and science I highly recommend this water rocket! It has great pressure and shoots almost 100 feet into the air. I was definitely impressed!
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Ratty
5.0 out of 5 stars You cannot beat this launcher..
Reviewed in the United States on November 19, 2019
Verified Purchase
Do not buy any other rocket launcher. This is the best on the market hands down. The engineering is incredible. Solid parts. Design is really excellent. Somebody has really given this launcher a lot of thought. To buy a product of this extremely high machining and durability is unheard of in this day and age. This will give many rocketeers years of fun.
One person found this helpful
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Elenabel
4.0 out of 5 stars This is a GREAT set-up! Very nicely planned. Couple minor drawbacks.
Reviewed in the United States on August 2, 2018
Verified Purchase
This is a GREAT set-up! Very nicely planned.

Works GREAT when used with a 2-Gallon hand-pressurized spray bottle and a battery-powered inflator!!

Nice people at their customer service, in my experience.

Main drawbacks (2):
1. The lock-screw on the ball-joint that allows tilting works poorly -- hard to get it to stay in position -- but it is super-useful, and worth the extra price!!
2. Ironically, the name-sake StratoFins fins are ridiculously weak -- with or without the parachute (which cuts travel height to ~1/3), we had a fin break almost every second launch -- always at the attachment point*

*(In a couple of interactions, the people at this company seem very nice -- I think it would be fairly easy to re-design the attachment of the fin to make that arrangement much strong -- if they can do that, this would be 5 STARS!)
16 people found this helpful
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Jessy
5.0 out of 5 stars Impressive altitude!
Reviewed in the United States on July 31, 2020
Verified Purchase
High quality parts. Easy to assemble. The 1L bottle rocket that we flew was awesome. My kid and I loved it. Very fast take off and very impressed with the altitude reached. Looking forward to trying a 2L bottle. My advice would be to follow the instructions and you will be successful and impressed.
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Mike
5.0 out of 5 stars Just AWESOME!
Reviewed in the United States on May 30, 2019
Verified Purchase
This launcher is super fun. It is very well made with metal components and boy can you get those water bottle rockets launched high! I definitely recommend purchasing additional bottle launch caps from the company as you may lose a bottle or two but this thing is amazing. The hardest part is the workout pumping the pressure into the system. At around 100psi you might never see your rocket again but boy is it worth every penny!
2 people found this helpful
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Me
5.0 out of 5 stars Worth it! If you don't want to build one
Reviewed in the United States on February 26, 2021
Verified Purchase
Well designed and made. We don't have an altimeter but this thing deffinatly launches hundreds of feet. It's so much fun, we love it.
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Top reviews from other countries

Donald Scott Currie
5.0 out of 5 stars Fantastic Quality.
Reviewed in Canada on February 1, 2023
Verified Purchase
I am completly blown away with the quality of this product. Certainly made to withstand thousands of launches.
Looking forward to teaching the kids the physics behind water rockets. Thanks a million.
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MD
5.0 out of 5 stars 120psi water rocket madness
Reviewed in the United Kingdom on June 8, 2021
Verified Purchase
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 Great fun with the kids, make sure you use air compressor fittings. I have plans for better rockets, see how high we can go.
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