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If employing the Chute Release, it would rubber band around the chute itself, which delays the opening of the chute at the specified altitude of 200 ft or 100 ft, but the later can be a little risky.

Yes, hearing protection may be more important than eye protection when bottles are rupturing. The sound is like a 12-gauge shotgun going off and hearing damage is more likely than eye injury. In 35+ years of launching I have only exploded 3 bottles and have been very close each time. In all cases the bottle should have been retired long before. I usually start the season with fresh bottles, but a system of perhaps marking the bottle with Sharpie tick marks indicating the number of launches would let one know when to retire a bottle. I have yet to implement this process and haven’t tested this concept yet, but let’s say 30 launches or less might be a good number. If you are only pressurizing up to 75 PSI the bottle might last indefinitely or 100 launches. If going to 120 PSI than 30 launches might be max. Anything below 100 PSI is not usually a problem, but once you hit 100 PSI and above that is a lot of stress on the bottle and it deforms the bottle. Also, if the bottles are crashing than that will shorten their lifespan as well. Now I always wear ear protection if I am testing out something crazy or I am working with spliced bottles. If I am operating within tried-and-true measures I don’t bother with it. Eventually, I plan on creating a video covering the results of 3 PSI levels 80, 100, and 120 PSI and show the results of repeated inflation and determine a sound retirement limit for each level. Don't forget that one can recycle the retired bottle as a nosecone, so don't throw the whole thing away.

About 2 ft. total length. Some of it will be used up by the threaded cap.

If you are using the StratoJig, I recommend making the fins out of 0.5mm carbon fiber sheet, which is lightweight and has minimal drag due to how thin the material is. If you need other ideas about materials and attaching fins to a soda bottle check out our other video: How to Make & Attach Water Rocket Fins: ruclips.net/video/bDC-fpyVjT8/видео.html. To reduce decent speed without employing a parachute, a fall away nosecone needs to be employed to prevent nosediving. For information about making one watch this video: How to Select & Prepare a Bottle for a Water Rocket: ruclips.net/video/FE4VTwx9LY8/видео.html

Weight (modeling clay or coin) needs to be added to the nosecone for a straight flight and for helping the nosecone to fall off at apogee. Watch how to make a nosecone where this video picks up at: ruclips.net/video/FE4VTwx9LY8/видео.htmlsi=rWA5aLBfgx8RD4k2&t=136

@@StratoFins thank you!

Thank you for your comment. See various water source (tank sprayer and garden hose) connections below: Attach a tank sprayer: ruclips.net/video/vk9lX-tQF_w/видео.htmlsi=YxFlBp6yDyM5J5GU&t=415 Connect to a tank sprayer: ruclips.net/video/uEbMKYz07ZQ/видео.htmlsi=RXZAHcF8IpxmgppU&t=27 Multi launcher connect: ruclips.net/video/uEbMKYz07ZQ/видео.htmlsi=7VPmgMsfMCr1LCb7&t=193 Connect to a garden hose: ruclips.net/video/uEbMKYz07ZQ/видео.htmlsi=ZaSplpNZ4bxRLlKi&t=205 (requires a garden hose adapter) The above connections only apply to the Ultimate model. The Standard and Deluxe models require filling the bottle with a funnel, although we do sell an Ultimate Upgrade Kit on our website that enables attaching a tank sprayer to these launchers.

@@StratoFinsthank you!!!

The StratoJig (black fin support) is injection molded and very durable. If it was 3D printed, we would have to price it much higher and it wouldn't be as strong.

Thank you. The Chute Release is excellent and as you can see in the video enables several variations on how it can be employed with a variety of rockets.

Various cameras are often running at the same time such as Panasonic GH5 & GH6 on the ground. Perhaps a drone DJI Mini 3 Pro in the sky occasionally. The camera mounted on the rocket itself is usually the Mobius Mini V2.

It is actually an octagon, 8 sided with 4 looping shroud lines that attach at these 8 points. Circular would also work, just space the shroud line attachments evenly.

The display screen on the altimeter shows the altitude achieved for each flight.

Thank you for your comments. There are 3 versions of the StratoLauncher IV, Standard (which is what this video is about) and the Deluxe and Ultimate version. They all perform the same, but have difference features at different price points. You can see the other assembly videos here: StratoLauncher IV Deluxe Assembly Instructions: ruclips.net/video/B8WHGR0hcDM/видео.html StratoLauncher IV Ultimate Assembly Instructions: ruclips.net/video/vk9lX-tQF_w/видео.html

Thanks for the quick reply. This clarifies things. But the link in the kit or maybe printed on the box was to the Standard video (at least, the text-based link; didn't use the QR code). @@StratoFins

@@markh.9698 The QR code should take you to a PDF of the appropriate launcher in the box whether that be Standard, Deluxe, or Ultimate. The printed URL should take you to the support page stratofins.com/manual/ which lists all the manuals for all of our products and one would select the launcher model you have.

Altitudes usually range between 205 - 350 ft. depending on weight of the rocket, PSI, and amount of water (wind can play a factor as well). We sell the StratoRocket (FTC tube) on our website stratofins.com/stratorocket-48-inch-3d-print-ftc-rocket/ along with a host of other water rocket related items from beginner to advanced. As you can see in the parachute video there are methods for deploying the parachute without the Chute Release, although the latter is more reliable. Also, the real benefit of the Chute Release is deploying at a lower altitude 100 - 200 ft. to minimize drifting off the field while under parachute descent.

I apologize for the delayed reply. The week before I was on vacation and then the following week I was trying to get caught up. Only now have I been able to respond on social media channels. Typically, with solid fuel rockets the altimeter is placed inside the tube or a chamber, which has some small holes, but you don’t want a lot of air flowing past the altimeter or it will give a false reading (suction effect). Since water rockets don’t have the luxury of placing the altimeter inside the fuselage other than maybe a nosecone, but these typically create a lot of suction like a spoiler on a car if the nosecone is open and not attached. Jolly Logic actually suggested sealing the altimeter in a small zip lock bag and I did test that theory out and it does work. The bag acts as a bladder if most of the air is removed and allows the sensors to read the barometric pressure change. The zip lock bag barrier is counterintuitive, but it actually works and the curved ascent graph on the AltimeterThree shows it working. Suction effect gives a spike and not a smooth curve in the altitude readout.

Glad to hear that this video was helpful to your scouts. It is all about creating a stable rocket regardless of the launcher that is employed. That is something people don't understand about physics and end up blaming the launcher rather than working on their rocket design. Restricted nozzle rockets are less forgiving, than full bore rockets when it comes to physics, but they are more efficient and require less water and hence less weight to overcome.

Any type of water rocket requires some sort of weight in the nosecone or it will flip during launch. Modeling clay is the safest, coins are okay, and even water can be used. A typical 2-liter bottle rocket needs about 1 - 1.5oz. of weight as part of the nosecone, which can include the weight of the nosecone itself. There needs to be enough mass in the front to direct the flight or the weight of the fins on the rear will want to flip and take over.

I apologize for the delayed response, but I was on vacation last week. You can find all the products on our website stratofins.com/

Yes, either 6 strings or 8 strings will work fin. If attaching to fins just double up on one of them. Or you can attach with a larger 8" cable tie around the neck of the bottle instead of looping over the fins. This way either number of strings will work fine. They all bundle up at the top anyway.

Howcome you didn't use a 6 stringed parachute?

@@boonleanglewis65 As mentioned 6 or 8 string chute both work fine. Our former chute supplier had 6 string, but our current supplier has 8 string. On our test rockets we have some of both.

What would happen if you used a 4 stringed parachute?

@@boonleanglewis65 It might work, but the canopy will flop around more and may not stay fully open if there is any wind. The more strings the fuller and more even the canopy will be on descent.

The app is the AltimeterThree by Jolly Logic, but unfortunately the AltimeterThree unit itself is not currently available. You can find additional information about the altimeter and the app here: stratofins.com/altimeterthree/

Is 120 ml the optimized water level for 120psi?

If I am understanding your comment correctly, it is about composition or framing, which is very intentional. Professional composition for video and photography often use what is called the rule of 3rds to place the point of interest on these lines that converge at the 3rd of the screen. It makes for a more appealing composition rather than have everything in the center all the time, which is visually boring. Also, it can give lower 3rd captions space to show without covering up any action taking place in the frame.

We don't make our own parachutes. There have been a few suppliers that we work with in procuring our parachutes. You can find them on our website: stratofins.com/stratochute-24/

I apologize for the delayed reply. The parachute is made of red 24" Ripstop Nylon 8 Sided and can be purchased on our website: stratofins.com/stratochute-24/

I apologize for the delayed response. Flight duration varies a lot based on weight and shape of the rocket, whether under chute or not as well as the PSI employed. A typical 2-liter soda bottle rocket with a parachute and pressurized to 120 PSI will have a flight duration of about 22 seconds give or take a second.

@@StratoFins awe man my class needs 30 secs where am i gonna get that kinda time

@@GoldAxoMC You might squeeze out 30 sec. of flight duration if you keep the rocket as light as possible so it hangs longer under chute. Weight is needed in the nosecone for launch, but when the nosecone comes down separately that will reduce rocket weight. One problem with a long hang time though is drifting off the field. Ideally, you want to deploy a chute at lower altitude so the rocket doesn't drift off the field if there is any wind.

@@StratoFins ah, interesting. do you think 3d printed or cardboard fins would work better to make it fly further with less drag? also tysm for the reply :D (i don't mind losing the rocket, plus the field is very large where we are testing)

You might try ReliaBot 3K Carbon Fiber Sheet 0.5mm thick - amzn.to/3OCAQ75, which is very thin, low drag, stiff, durable, and lightweight. We have a new device that hasn't been released yet, because I am working on a video to explain its benefits and use. It is called the StratoJig and enables attaching whatever fin design and material you desire to a bottle neck. If you contact us on our website, I can provide more details.

We apologize for the delayed response. If you are looking for parachutes you can find them here: stratofins.com/stratochute-24/ If you are looking for launchers, they can be found here: stratofins.com/products/launchers/

@@StratoFins Awesome!!! Thank You!

Thank you for your kind words. We keep trying to expand our water rocket product ecosystem by developing new products and techniques. The home-grown stuff is fun and our StratoLauncher IV still allows for all of that especially when it come so fin making and rocket design. Granted the Chute Release is superior to a Tommy Timer, which you might be referring to when it comes to chute deployment. Although the Chute Release is expensive, it pays for itself by safely and reliably returning what might be an expensive rocket that may contain several hundred dollars’ worth of gear like camera, altimeter, chute release, parachute, fins, nozzle, etc. Where the Chute Release really shines is on windy days and small fields when normally your rocket would drift too far while descending under parachute from a higher altitude and land in a tree or off the field and that expensive equipment could be lost. The Chute Release delays deployment to the 100 - 200 ft. range, which minimizes drift and it is easy to use.

me too

3 minutes bro did it go to space💀

Thank you for your kind words and comments. Yes, I too have messed around with plastic Easter eggs for nosecones usually on FTC rockets. One main reason for developing this nosecone is that many bottle caps don’t seal well under high pressure and designing something that would allow for a rubber washer was necessary. We have several new products that we have been working on last year, but unfortunately, they are rolling out slower than planned due to continual tweaking and improvements. Glad to finally be able to release the StratoCone Mini product along with the video early this year.

I apologize for the delayed response. Polyethylene terephthalate, also called PET, is the name of a type of clear, strong, lightweight and 100% recyclable plastic.

Thank you. Also, thanks for sharing your story. Glad to hear that you took the time to introduce more kids to the fun of water rocketry!

Thank you for your comments. We apologize that the kit box does not have a notice about assembling 24 hrs. before use, but our assembly video does announce that. Yes, the photos on Amazon need to be updated as our product gradual improves with each production run. Initially, Teflon tape was included in the kit, but customers could not handle it and often put in where it was not needed, which created leaks. Threadlocker works better and is easier for most to use, but there is that 24 hrs. wait period. Normally this is not an issue because aside from assembling the launcher there is a fair amount of prep work required such as getting bottles ready, making weighted fall away nosecones, attaching parachutes, etc. and often waiting for good weather such as little or no wind blowing. In water rocketry it is best to prepare equipment and materials long in advance before actual launching, which makes for a much better launch day experience. That way one can “Seize the Day” when that perfect opportunity and/or weather appears and everything is already to go. However, we will take your advice and seek to add that 24 hr. notice before use to our next box print. Not that anyone reads the valuable information on it already.

How did it go?

Same but it’s tomorrow. I’m so tired

@@e_t_1_7 the parachute went well, but my water bottle rocket didn't fly so high.

Dang

Good luck

The StratoLauncher IV comes in 3 models: Standard, Deluxe, and Ultimate. If there was no pressure gauge then you have the Standard version. Watch the Standard assemble video here: ruclips.net/video/acuwHgFs9bU/видео.html