Not being able to throttle down or stop the reaction makes a small amount of sense to me, but what doesn't is why we cannot refuel them after they have been used.
Does using the rocket somehow destroy the components during use or is this mechanic to keep us from reusing the overpowered SRBs with gimbals on interplanetary burns?
Hello there I am starting to get into high powered rocketry but I cannot source any propellant do any of you know any propellants that are legal/ easy to obtain in Canada? Thanks
I know that it's too hygroscopic to be practical in traditional rocket candy because water is needed to lower the melting point of table sugar enough that it doesn't decompose, but according to Richard Nakka's site water isn't needed if sucrose is substituted for dextrose, which has a lower melting point.
PROPEP gives an ideal ISP of 115.2 for the traditional 65/35 O/F ratio in dextrose-based propellant and 115.5 for the theoretical optimum 69/31 O/F ratio, but using sodium nitrate instead gave an ISP of 125.5 for a 65/35 ratio and 125.6 for the theoretical optimum of 67/33.
Sodium nitrate's hygroscopic nature is obviously a problem, but as water isn't necessary for the manufacture of dextrose (or sorbitol or erythritol)-based propellants, it should be manageable by storing grains in airtight containers with a drying agent, as well as drying the sodium nitrate in an oven before the fuel is mixed. It offers a significantly better performance than potassium nitrate and is readily available, so why isn't it used more often? Am I missing some major and obvious drawback?
I am currently working on a mod with some others that is highly realism-based, (KSPIE) and I personally am currently working on adding some more fuel options so certain engines can be specialised for more uses. However, I am stuck on the Hybrid and Solid engines. Help?
Hello everyone, What's the best way to model solid burn back ? I'm talking about geometries that have no analytical solution. My goal is to find the burning area in order to perform a ballistic prediction. Is there any free cad software that can calculate incremental burning area ?
It was called the SS67B-2 (later SS67B-3) and was made by a Canadian company called Systeme Solaire.
https://rocketdungeon.blogspot.com/2012/06/rocketaholic-provides-amateur-rocketry.html
http://pages.total.net/~launch/ss67b3.htm
http://www.ukrocketman.com/rocketry/liquids.shtml
From the outside, the SS67B-3 looked much like an ordinary high-power rocket; it was 4" dia. and about 6 feet tall. It ran on ordinary gasoline and H2O2, which were fed into the engine by pressure provided by a reservoir filled with dry ice (carbon dioxide).
According to the UKRocketMan article linked above, the SS67B-3's performance was mediocre due to a poor thrust-to-weight ratio. It depended on drag separation of the nose cone to deploy the parachute, which seems very dicey for such a large, heavy, and expensive rocket. Most people who built one probably chose to add an altimeter and ejection charge.
It's safe to say that Systeme Solaire didn't sell very many of these kits. The disadvantages were obvious: the $1098 price tag, the safety issues involved in handling hydrogen peroxide, and the fact that it couldn't be flown at NAR events.
Did anyone out there build one of these rockets, and if so, what were your experiences?
Hey just a random question, but Ive been reading about the ammonium perchlorate used in modern SRBs and they are pretty bad for the environment, so im just wondering if there are any other substances that could one day be used as a solid propellant that is non polluting, thanks.
Also I have read about Alice propellant, but spewing aluminium oxide everywhere is not a good thing either.
Launch after launch we get more views of the inside of Falcon 9's tanks, but i never found any probes or sensors in there.
Do the rockets measure the propellant left with sensors i didn't find, or do they calculate what is left knowing how much it was fueled with and how much it used during burn ?
And if there are sensors, do all rockets use them ? or only parts that relight during flight ?
