Fried Chicken Posted February 3, 2006 Share Posted February 3, 2006 Well, this was a successful topic in the old forum, and is also the topic that I am interested in, so I thought I would start this topic again. I have no more to say, I just think that it's essential that all the popular topics of the old forum are reposted in the new forum, for the purpose of the forum transition. Link to comment Share on other sites More sharing options...
[w00t] Posted February 7, 2006 Share Posted February 7, 2006 65:45 Kno3:Su ratio seems to be what most people use for this and what is reported to be the best ratios. tho i have seen people say 75:35 is also good.. never try that one tho. adding 0.5-2% of total mixture with Fe2o3 (red iron oxide) seems to make it burn faster.. Apparently Recrystalising method apears to be 20% longer lasting burn rate with about the same ammount of power, to what i have observed. Link to comment Share on other sites More sharing options...
Sason.net Posted February 7, 2006 Share Posted February 7, 2006 There are lots of good ratios like you said 65:45 65:35according to performence of my kn sugar i found that the best ratio is 68:32the best ratio of your rockets is dependent according to the scale of the rockets so there isnt a specific best ratio Link to comment Share on other sites More sharing options...
Von Bass` Posted February 8, 2006 Share Posted February 8, 2006 I assume this mixture is hygroscopic, how long could you store an engine before it would be unusuable? two days? What if i sealed it in an air tight container? thanks Link to comment Share on other sites More sharing options...
Givat Posted February 8, 2006 Share Posted February 8, 2006 Yes its' very hygroscopic. The time you can store an engine before it would be unusable depends on you climate and humidity in the air.And you can use air tight container to store it, I use Zip-Lock bags. Link to comment Share on other sites More sharing options...
teknix Posted February 8, 2006 Share Posted February 8, 2006 I put my engines in a ziplock bag and then put that in a air tight plastic container filled with salt. They seem to store for a long time this way. Link to comment Share on other sites More sharing options...
Von Bass` Posted February 8, 2006 Share Posted February 8, 2006 Thanks, i think i shall have a go at a few of these! Link to comment Share on other sites More sharing options...
Guest pyrokid00000 Posted February 8, 2006 Share Posted February 8, 2006 Would is be dangerous to add a bit of potassium perchlorate to this type of rocket to make it just a bit faster? Link to comment Share on other sites More sharing options...
Rooster Posted February 8, 2006 Share Posted February 8, 2006 I can see no reason why adding potassium perchlorate would be more dangerous. Of course the propellant would be more powerful, but that doesn't mean it will be faster. Try and see, and please tell us the results. Link to comment Share on other sites More sharing options...
aa92td Posted February 8, 2006 Share Posted February 8, 2006 I think its just a waste of expensive perchlorate.If you want to make your rocket propellant faster\batter, you can add him Red iron oxide-Fe2O3 But i preffer Aluminum sherds (its work great). Link to comment Share on other sites More sharing options...
Guest pyrokid00000 Posted February 10, 2006 Share Posted February 10, 2006 Just wanted to let you know the results of adding perchlorate to the mix. It changed the sound of the rocket making it a bit louder. It dident change the speed at all, just a waste of perchlorate your right. Link to comment Share on other sites More sharing options...
evilgecko Posted February 10, 2006 Share Posted February 10, 2006 Castings of KNSU or KNDX have water in them. The perofrmance of a motor is increased if you actually dry them out. I built a little dessicator using CaCl in the bottom of a airtight container with a little rack that held the motors above the CaCl. After a few days the motors were extremely dry, all stickiness had dissapeared and they become quite brittle. However, I never got a KNDX motor to work (somehow they absorbed moisture when inside a PVC tube. I think it was from the plaster of paris nozzle?) Link to comment Share on other sites More sharing options...
kwstag Posted February 12, 2006 Share Posted February 12, 2006 I think adding sulfur to the mix made it a lot better.. Link to comment Share on other sites More sharing options...
Mumbles Posted February 12, 2006 Share Posted February 12, 2006 You are going to need to provide more information than that. Perhaps a ratio of sulfur into the mix, or which mix you used. Sugar does include more than sucrose. Anyway, for everyone else, 10% extra sulfur does make a nice propellant. It is the formula for the "incredible 5 cent sugar rocket". Presumably, the sugar referenced in sucrose. However any sugar should work with the same ratio. KNO3 - 63Sugar - 27Sulfur - 10 Link to comment Share on other sites More sharing options...
kwstag Posted February 13, 2006 Share Posted February 13, 2006 Alright Mumbles, I understand. Potassium Nitrate 63 Powdered Sugar 27 Sulfur 10 Those are some of the best ratios.. Note: USE POWDERED SUGAR INSTEAD OF GRANULATED SUGAR. It works A LOT better and makes an excellent fuel. Link to comment Share on other sites More sharing options...
Fried Chicken Posted February 13, 2006 Author Share Posted February 13, 2006 Note: USE POWDERED SUGAR INSTEAD OF GRANULATED SUGAR. It works A LOT better and makes an excellent fuel. You know, that is the case in almost any pyrotechnic formula... The more powdered the better. Link to comment Share on other sites More sharing options...
kwstag Posted February 13, 2006 Share Posted February 13, 2006 Yes of couse I know but others may not.. It's nice to be a little more specific when talking about "Sugar"... It could be Powdered or Granulated but for this we like Powdered.. Link to comment Share on other sites More sharing options...
FrKoNaLeaSh1010 Posted February 13, 2006 Share Posted February 13, 2006 Yeah but when talking about sugar you should take into effect type AND particle size. There are many many different sugar's Link to comment Share on other sites More sharing options...
Spoony Posted February 15, 2006 Share Posted February 15, 2006 I love making these, they are easy and cheap to make, and fly pretty well. I just have problems with stability, but I guess that can be remedied by using a longer stick. I use the standard 60:40 KNO3:Su, melted, with no core, and they fly very well. Link to comment Share on other sites More sharing options...
teknix Posted February 15, 2006 Share Posted February 15, 2006 How the heck are you getting KNO3/SU rockets to fly with no core?! Are these very small bottle rockets or something? Link to comment Share on other sites More sharing options...
Spoony Posted February 15, 2006 Share Posted February 15, 2006 They were 10mm ID, 10cm long. I will get a vid of one flying if I can. Link to comment Share on other sites More sharing options...
Sason.net Posted February 16, 2006 Share Posted February 16, 2006 wow that is very impressing it is very hard to make nozzless rockets to fly i have never succeeded doing thatplease show us that video Link to comment Share on other sites More sharing options...
TheSidewinder Posted February 16, 2006 Share Posted February 16, 2006 Coreless, not nozzleless, Sason. I'd love to see a nozzle-less (whistle) KNO3/Sugar rocket that worked! Link to comment Share on other sites More sharing options...
teknix Posted February 16, 2006 Share Posted February 16, 2006 What are the dimenstions on your nozzle? And was the KNO3/SU grain fully exposed on the outer surface to the burn (gives a much larger surface area) or was it just an end burner with only the tail end of the grain exposed? Link to comment Share on other sites More sharing options...
Spoony Posted February 16, 2006 Share Posted February 16, 2006 Ive got the rockets made and ready, but its too damn windy to test them. And the nozzles are 2mm, and it was an end burner (but I may have screwed it up, so it might of had loads of air bubbles in or whatever) Link to comment Share on other sites More sharing options...
Recommended Posts