High Power Water/Pyro Rocket - Part 4 - Fins

[@chrisp6582]

You say not the most exciting, but the care and attention to detail that goes into making these rockets is lovely to watch. Thanks for taking the time and effort to film the process.

[@AirCommandRockets]

Cheers, thanks for following along. :)

[@q300SBB]

Love your work George.

[@poobertop]

Maybe not an exciting video.. but here for completeness. I admire that so much and really enjoy all your videos, cheers.

[@gk123434534]

Thank you :)

[@thorinti]

Felicitaciones George!!! Están a nivel de la NASA 👏👏

[@daninvents3652]

Very interesting tutorial George! Have you considered metal 3D printing for making nozzles? I wonder if porosity would be a problem in that case

[@AirCommandRockets]

Thanks Dan, I am not sure I'd be able to afford 3D metal printing. We just need a bigger lathe. :) I've been on the look out for a used one, but haven't found a good one yet.

[@_Creativo]

awesome work! can´t wait to see the hybrid rocket working both on water and propellant

[@AirCommandRockets]

Cheers :)

[@fipscraft5997]

Can you say something about when we will see next part of Horizon?

[@motoflyte]

Hey...how about using a pyro rocket to create the pressure inside a water rocket ???

[@AirCommandRockets]

That would certainly be possible, though you would have to know how the increasing pressure inside the pressure chamber affects the back pressure and hence burn rate inside the motor.

[@motoflyte]

@@AirCommandRockets Yes, the energy densitys would have to be matched, but it's very interesting. Certainly the pyro rocket has much more stored energy than a compressed air chamber. One might need some kind of ceramic piston to seperate the rocket from the water.

[@Thirty-Two]

first but in all seriousness, great video!

[@tenns]

these are the fins but not the fin.

[@ascensionrocketryshorts]

dint know there was a thing like fiberglass. 😂we just use 3d printed fins, printed in vase mode. it gets the job done with only 3 rotations on the way to the altitude of 200+ meter. so what are reasons to use so strong fins? only for higher forces? non the less again impressive work!

[@AirCommandRockets]

This rocket weighs over 4kg dry. Because this is our Level 2 rocket that will be flying on a bigger solid motor you want to make sure the fins don't come apart during flight and especially when the rocket lands. If you damage a fin you don't pass your Level 2 cert. Would you be comfortable attaching your fins to a house brick and dropping them onto solid ground from 1m?

[@ascensionrocketryshorts]

@@AirCommandRockets no not at all thank you

[@CoronaFighter_]

@@ascensionrocketryshorts haha yeah the main concern is passing the level 2 flight... and there are huge forces on the fins when flying with large rocket motors due to the speed :O

[@elijahlong7791]

I think I’m going to start my own water rocket

[@AirCommandRockets]

One word of warning, water rockets are highly addictive!

[@michaelsilva7085]

Not the most exciting but very interesting. Thanks for the content! I can’t wait to see it fly.

[@AirCommandRockets]

Thanks for following along :)

[@simonabunker]

There seems to be a recent trend in building large rocket parts with lathes that are slightly too small. Great engineering getting it all to work eventually!

[@marcosalvescosta8548]

I'm from Brazil, I watch all your videos, I love water rockets, I really want to evolve just like you! I've never had success with bottle splicing here, I've tried several adhesives but they all break at 60PSI.

[@AirCommandRockets]

Hi and thanks for following along. As you've discovered not all glues are created equal. There actually aren't that many suitable glues for PET. Have you tried the polyurethane based wood glues? They have a honey like consistency and are also kind of honey coloured. (No don't use honey :) ) Are you able to order the PL premium on-line from e-bay or Amazon? When you tried the splices did you give them enough time to cure. Sometimes it can take 3 days before the glue is fully cured as it takes time for atmospheric moisture to penetrate all the way into the joint.