Also filled in the Survey. Good luck with the research project.

We had fun over the last few weeks working on a collaboration with Grady from the awesome Practical Engineering YouTube channel. (https://www.youtube.com/user/gradyhillhouse)

My son John did the editing of our water rocket part of the video.

I also love the idea of his buzzer that he used to summon his wife when he needed her. That reminds me of my uncle in his 70's practicing for a flight from Europe to Oz by sitting in his easy chair for hours at a time and having Auntie bring him food, then take his tray away, bring him drinks every...

Hi Derek, I've always used this formula for getting a rough estimate of descent rate. http://web.archive.org/web/20111018045919/http:/my.execpc.com/~culp/rockets/descent.html It's no longer on-line but available through the web archive. I think OpenRocket can also predict the descent rate based on p...

That's really cool Matthew! Thanks for sharing the details.

Very nice work Simon. Glad to see you had good fun with the water rocket. I was surprised at how well the camera survived on the rocket without a parachute. I hadn't seen these particular cameras before they look nice and compact, how much do they weigh?

That's an outstanding effort Warren! Congrats on the record flight.

Hi Joe, Have a look here: https://www.sollercomposites.com/tow.html we have bought stuff from them before. They have quite reasonable prices. There is some fiberglass tow on that page, scroll to the bottom. It is interesting how they won't ship the high strength CF tow outside of the US.

Great update Derek! The fluro colours really stand out. I didn't realize that you had such problems with the fold in the sleeve. The carbon fiber sleeves we use have a similar fold, but we've never had an issue with it once it was wetted out and put on the mandrel. I'll have to keep your workaround ...

Looking great! Will there be a seal of some sorts under the bolt head, or is the leakage around the thread insignificant?

That's an interesting design Derek. I don't think I have seen a motor mount go through the transition, but looks good! With a draggy back end like that, will you be using shear pins on the nosecone to avoid drag separation, especially if you end up adding nose weight?

@SpaceManMat I believe that it's possible. I think I have read that some people have created motor files for their water rockets to simulate in OR. It would be nice to be able to just set the parameters in the program itself. I think it was one of the future plans they have listed: Planned future fe...

We had the opportunity to fly our rocket at the last NSWRA's Mullaley HPR launch. Here is a video of a couple of those flights: OTArDzG2veg We're working on a follow up video that has a closer look at the data from these flights and how it compares to simulations. We're now going start focusing on b...

That tube turned out really nice joeman, well done! The epoxy to resin ratio is great. If you are adding epoxy to the outside I would recommend mixing it with microballoons before applying, that way you get a lighter weight finish and easier to sand as well. Though you would need to paint it a solid...

When good water rockets turn bad, they are turned to the dark side: