SodaStream cylinders are DOT3AL and can be had empty for a few dollars.
On Sunday, March 14, 2021, Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx> wrote:
Thanks Terry,elaboration or critique including that. Thanks for the clarification.
Yes, there’s probably countless points that needed further explanation,
ie. if you have a dodgy igniter or connection or whatever issue with the
While we’re at it, I guess another substantial advantage is ignition –
normally pre-fill the tank under controlled conditions with scales.
Having much more control of your tank mass is another virtue as you
to ensure your tank is *rated* to hold the required pressure. If you’re
The one glaring point to laser focus on with a Chill-and-Fill hybrid is
popular with some people is the vast array of Paint Ball kit that’s
One thing that has changed a bit since these style of hybrid were
On Behalf Of Terry McCreary
Cheers,
Troy
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
Sent: Sunday, 14 March 2021 4:53 AMAerotech's hybrid could be launched on the same pad as solids, with an
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Hybrid High Powered Rocket
Hello all,
Troy, I don't know if this is what you meant, but the pyrovalve used by
behalf of Stephen Daniel <swd@xxxxxxxxx>
Best -- Terry
________________________________
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> on
Sent: Saturday, March 13, 2021 10:48 AMthe components to a large metal frame that bolts to your test stand. This
To: arocket@xxxxxxxxxxxxx <arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: Hybrid High Powered Rocket
I think you should break this project down into 3 projects.
1) Build your motor. Don't worry about making it flight weight. Bolt
you'll want for your nitrous, but plan to fly it with a commercial
2) Build and fly a rocket. Make it big enough that it is likely the size
a new motor and a new airframe, but you'll be able to reuse many pieces,
3) Integrate and fly your nitrous rocket. This may well involve building
wrote:
On Sat, Mar 13, 2021 at 7:59 AM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
(heavy) solenoid valve on the rocket/engine. You need heat/energy/reactive
It’s unusual – especially with these size rockets – to actually carry a
and CC into either an olive or press-in connector that also can act as an
Examples:
U/C valve: where the filling hose to the tank is fed through the nozzle
(ie. typically directly aft of the injector). Sometimes a thin layer of
Pyrovalve: a slug of solid propellant is used to block the injector flow
and proceeds to regress to the point where it mechanically fails and allows
To initiate the engine, the solid propellant is ignited from the CC end
range of injector geometries and there’s less chance of over pressurising
The advantage with this method over the UC is it allows for a broader
the late 90s-2000s era. This system required more ground support equipment
Kline/Pooley? Valve: used for the Hypertek commercial range of hybrids of
nozzle, through the CC with the inner (longer) spike inserted all the way
Basically, a coaxial stainless steel fill spike is inserted up the
or practical especially for the size hybrids being discussed here.
There’s probably a hundred more methods, but these 3 are the most elegant
pyro recovery for over 10 years, but it’s a really challenging project to
As for non pyrotechnic recovery. There are systems – I’ve been doing non
provides more detail on the methods I just described. I’ve posted this link
A local club presentation I did back in 09. It’s a bit dated, but
Presentation.ppt
www.propulsionlabs.com.au/hybrid/TRAAU Hybrid Propulsion Systems
On Behalf Of SAI WAI PHYO
Cheers,
Troy
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
Sent: Friday, 12 March 2021 6:37 PMoxide as the Oxidizer and 3d printed ABS as fuel. I need help on the design
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Hybrid High Powered Rocket
Hi all!
I am want to design a hybrid high powered rocket which uses nitrous
the motor? My target altitude is 1km.
What should be appropriate amount of total impulse that I should set for
airframes but since I am making a hybrid, I need an airframe that can fit a
What size should the airframe be? I am aware of the different sizes of
of a high powered rocket .
Are there any non-pyrotechnic recovery methods that I can look into?
I do not plan to make this yet, I just want to learn the design process
Regards,
Sai Wai Phyo
Student | Diploma in Aeronautical Engineering
Singapore Polytechnic
500 Dover Road, Singapore, 139651