I've learned that the cornstarch in powdered sugar inhibits the burn rate of the fuel. If you want a more powerful fuel, use granulated sugar.

Funny how this popped up in my feed. I just finished reading Rocket Boys by Homer Hickam. Good book.

I liked the specific ingredients and Scale for measuring. The Steel tube for the motor was scary, shrapnel hazard, the steel rod for the center hole was scary, ignition hazard, and the lack of temperature monitoring during the sugar melt was scary, ignition hazard. Excellent identification of a pathway (rather hazardous though!).

@pyrogun1839

3 жыл бұрын

Over the 4-5 years I made rcandy, I found that the concrete nozzle/endcap fail before the steel tube which relieves the pressure that would cause shrapnel. Steel shrapnel is not at all something to worry about unless you tried using an explosive as fuel and welded on steel endcaps. Also, the fuel is very stable. It requires a flame to ignite. I can plop some of it directly on my stove at the "High" setting, and it won't go off.

Instant sub just for the intro!! Great vid man!

@pyrogun1839

3 жыл бұрын

Thank you!

Great video mate thanks heaps 😀

@pyrogun1839

4 жыл бұрын

Glad you liked the video!

first of all thankyou very much sir for ur quick reply ... also added that we have problem with wet mixture , after doing mixing on pan it simply remain as it is (wet as a liquid wax) , what would be suggestion for that?

@pyrogun1839

6 жыл бұрын

You're welcome! Are you using water in your mixture?

Wow nice vid man

@pyrogun1839

7 жыл бұрын

Thank you!

Nice engine. U have a video testing it? Terje Grov ,Norway

@pyrogun1839

6 жыл бұрын

This is the video of the test :) kzread.info/dash/bejne/i3pn06yLkc3ZqLg.html

Could i make these in inch tubes with a smaller core...? would i still get a good burn rate or would it be over with in milliseconds...? bit wary of going to big in England..Good show by the way....That was an amazing easy tutorial....thank you...just one more question,....with the added extra weight, steel tubing,cement,....what type of weight would that set up lift??? thanks.

@pyrogun1839

4 жыл бұрын

Absolutely! Your core should be the entire length of the fuel grain, so when you say "smaller" I assume you mean a narrower core which means it would take a bit longer to increase thrust. Your nozzle diameter greatly affects the power of the motor (too big = small amount of thrust/too small = motor blows up). I would say this motor weighs about the same as the rocket itself. I understand your concerns being in a more populated area. You definitely need to be careful. Glad you like the video! Here is a video of a rocket being launched with this motor...kzread.info/dash/bejne/Z4Co0sOqpKXLppc.html Here is a video of a rocket with a 1 inch PVC motor...kzread.info/dash/bejne/fGdprsdplqSzmbg.html

Hello Pyrogun! My name is Oliver. I think your videos are really great. Great job of you. I could learn a lot from you. Thanks a lot for this. How nice it would be if I were friends with you. I still have some questions about your work. You are really cool! Sorry, my english is not very good. I just hope you understand me anyway. Best regards from Germany. I hope you are fine and that you make new videos again.

@pyrogun1839

5 жыл бұрын

Thanks for the kind comment, Oliver, and I'm glad you like my videos! I'm doing well. Life happened, and my focus shifted away from making KZread videos. Perhaps I'll get back into it at some point :)

good job Men

Great video thanks for sharing! I would think being the propellent is not one solid piece it would overpressure at the seams between the grains? Apparently this doesn’t seem to be a problem. Are there any other procedure not shown?

@pyrogun1839

4 жыл бұрын

I'm glad you like it! The fuel grains are supposed to burn from both ends and in the core. The problems I've experienced have mostly been caused by cement nozzles and end-caps that are too weak to hold up to the pressure. Someday I'll make some metal parts for more power.

@18141776hhhh

4 жыл бұрын

Pyrogun1839 Technically the seams between the grains would be a crack in the propellent? The nozzle and plugs couldn’t be more anchored than that I would think. I haven’t seen cement used to line a metal melting furnace. I would have expected the cement to last for the motor. Cracks like pottery heated too fast or damp in a kiln ?

@pyrogun1839

4 жыл бұрын

@@18141776hhhh No, they are not a crack. I think the end-cap/nozzles slip out with too much pressure because the metal surface is so smooth. Or they simply break apart due to the pressure. May be a combination of cracking/slipping. Impossible to tell without a slow-mo camera.

@pyrogun1839

4 жыл бұрын

@@18141776hhhh with metal end-caps and nozzles screwed into the engine body, the only thing that could fail/limit the power in an engine is the fuel. I've seen some very large rcandy fueled engines produce huge amounts of thrust without failing because they have high quality metal parts.

It should be made known that the shrinking of the rocket “candy” makes those weird ditches in the fuel, these will result in bubbles of air in the rocket engine, and might result in explosions. To fix this, make each section a centimeter larger to allow sanding, or even cutting at least. This will lower the chance of exploding by quite a bit, but will lower the surface area of the fuel, therefore slightly less thrust. That may be fixed with better nozzles.

@pyrogun1839

4 жыл бұрын

Where are you saying the bubbles of air will be? Inside the rcandy grains? I would think that the settling of the fuel would fill in any air pockets, not create them.

@bob-hacking6027

4 жыл бұрын

Pyrogun1839 not in the grains. When he says the rcandy is cooled, you will see that there is a dip in the top. Putting a flat surface of rcandy on top of that will form a “bubble”. Like a flipped over half pipe

@pyrogun1839

4 жыл бұрын

@@bob-hacking6027 Ok, I see what you're saying. However, those "bubbles" don't cause my rocket engines to fail. The grains burn from both ends and from the inside of the core (as seen in this animation...kzread.info/dash/bejne/hY6b2qedkc3dlKg.html ). Whether the ends are flat or have a bit of a dip in them (I've tested both ways) the performance is similar. The engine utilizing these grains worked great! And yes, better nozzles would help. However, I wanted to make these as cheap as possible so I was limited by the strength of my cement nozzles.

Cooking with pyrogun1839

generally how much time it take to completely dry (fuel in blocks) ? which method you use to make it completely dry ?

@pyrogun1839

6 жыл бұрын

tejas zagade I don't make dry fuel grains. If I did though I would use a press to compact it into grains.

Hello i from Indonesia

and the test?

I tried it without the iron oxide and it worked just fine, what difference does it make

@pyrogun1839

4 жыл бұрын

Iron oxide increases the burn rate.

What is the differance between simply blending sugar and kno3 and compacting it into a rocket in a tube and smelting it into a solid?

@pyrogun1839

3 жыл бұрын

I don't know. I would definitely like to try that if I had a hydraulic press and the tooling needed. That's how fireworks are made 🤷🏼‍♂️

@Shizbox

3 жыл бұрын

@@pyrogun1839 I've seen people make it by ramming the powder with a dowel and hammer, you don't need a hydraulic press :).

@pyrogun1839

3 жыл бұрын

@@Shizbox I've seen that too, but I'm not sure it provides enough pressure to compress the fuel enough. I'd rather make rocket motors that way than cook the fuel if it works well.

@Shizbox

3 жыл бұрын

@@pyrogun1839 You should try it. I'm in the processes of making one but I'm not sure if it is going to work due to the fact that I'm using cornstarch water paper as a plug. Since kno3 is an absorbent it might've lost its potency because of moisture. I did put it in a sealed plastic bag tho

@pyrogun1839

3 жыл бұрын

@@Shizbox Maybe. And your plug might work, just depends on the size of the motor.

+Pyrogun1839, my bates grain looks almost the same (06:39), but remains sticky for a long time. How long did it take for you to dry completely?

@pyrogun1839

6 жыл бұрын

It's pretty much always sticky. I'd say it takes about 15 minutes to harden completely. Temperature/humidity might affect the hardening time.

@arkamitra14

6 жыл бұрын

Pyrogun1839, how do you preserve the grains? Seal pack immediately after pulling off the coring rod?

@pyrogun1839

6 жыл бұрын

Arka Mitra Usually I immediately put them in the rocket engine, but if I need to store them, I put them in a plastic bag and then in an ammo can.

@arkamitra14

6 жыл бұрын

Pyrogun1839, I see! Packing into the rocket is the good idea 💡 now is it good to apply some oil to the coring rod before inserting? I don't have those foils and whenever I've tried with those, it got stuck poorly making the grain unusable.

@arkamitra14

6 жыл бұрын

And a few more things: -- 1) Coring the grain seems a bit hazardous sometimes! What if I pour the propellant, let it dry and drill slowly as per requirement? Does it affect the grain's structure? -- 2) In this particular motor, you've used 4 bates grains each of 2.5" length with a 0.5" core, right? How much thrust can it produce approximately? And, can I apply the same configuration in my PVC motor? --- PLEASE HELP ME OUT. I HAVE ALREADY FOLLOWED YOU ON TWITTER - WOULD BE GREAT IF YOU ENTERTAIN DIRECT MESSAGE OVER THERE. :)

could you tell me that why we should melt the mixture? does it affect the burn rate?

@pyrogun1839

2 жыл бұрын

For some reason it makes it burn a lot faster.

@ngotranhoanhson5987

2 жыл бұрын

@@pyrogun1839 wow, thank you.🤗

noice

Hey can we use petroleum jelly coating on mold tubes instead of foil?

@arkamitra14

6 жыл бұрын

shri hari ram.g, I'm doing the same dear. ☺

@arkamitra14

6 жыл бұрын

You can do it with coring rod too.

@pyrogun1839

6 жыл бұрын

I've heard of this being used, but I haven't used it. Let me know how it works for you!

@bullygram

6 жыл бұрын

Thanks for the reply guys

Why go through all the extra work and risk fire by cooking the chemicals ? Using a nutra-bullet to pulverize the granulated sugar and potassium nitrate together as well as the clay kitty litter works great. I just started messing with these sugar rockets .I kept the tubes from used up fireworks were they already had the nozzle plug.All I did was use a mallet to compress everything, I didn't cook anything. I question how much better your results are by cooking the chemicals.After my first 3 launches I upped the ante and added 65% P.Nit., 35% Sugar, and for extra strength I added a heaping tablespoon of gun powder into the high speed blender to mix up thoroughly. I stuffed 3/4's of the engine with my normal formula and finished off with my gun powder mix. Anyway I taped a long skewer to it and lit the fuse. I didn't use iron oxide. Didn't need it. My first attempt launch was AMAZING ! These things go higher then any ESTE'S rocket I have ever seen. I tried cooking the chemicals once but it was too messy,time consuming.If I would of noticed a difference I would of continued cooking the rocket full. Safety ..Safety... Safety !

@pyrogun1839

5 жыл бұрын

When I cook on my burner, the rcandy cannot self-ignite. It simply doesn't get hot enough. And from my experience, cooking the fuel has always been very effective. Additionally, I'd have to make/get new tools to load rocket engines with dry fuel.

@pabloxd1239

5 жыл бұрын

so wich one is better? cooking it? i saw other videos that they dont cook anything and fly a lot.

@pyrogun1839

5 жыл бұрын

Pabloxd123 I've heard cooking the fuel can decrease the power of the fuel, but I don't feel like it does that much. My rockets get pretty high with relatively small engines. Cooking works great for me.

Can i do this on my bbq stove top?

@pyrogun1839

5 жыл бұрын

Absolutely. Is it safe? Probably not. Open flames will most likely ignite the fuel.

I'm confused to regular KNO3 and powdered KNO3...It's all the same isn't it?

@pyrogun1839

2 жыл бұрын

Regular kno3 is granulated. Powdering the kno3 helps it burn a bit faster and can possibly affect the liquidity

@jenalynbalmores9459

2 жыл бұрын

@@pyrogun1839 then if I have a granulated KNO3 I don't need anymore a powdered KNO3? isn't it?

why arent you using a 2-1 ratio of fuel to oxidiser?

@pyrogun1839

5 жыл бұрын

Over the years, I settled on 37/63 because I felt it provided the power I wanted and the liquidity needed to cast grains easily.

@adrianjezierski8093

5 жыл бұрын

You mean oxidiser to fuel.... Fuel is sugar and KNO3 is Oxidiser.. You always put more oxidiser

what is the difference between powdered kn03 and normal kn03

@pyrogun1839

7 жыл бұрын

I get my KNO3 in the form of granulated sugar. I simply powder it by grinding it in a coffee grinder. The best way to powder the KNO3 would be to use a ball mill.

@pyrogun1839

7 жыл бұрын

Also, powdered KNO3 causes the fuel to burn at a faster rate.

@alexichristodoulou9786

7 жыл бұрын

Pyrogun1839 Ohh thanks so much

What is RC andy or R Candy?

@pyrogun1839

5 жыл бұрын

R candy is short for rocket candy. It's sugar-based fuel.

Dont make steel cased rocket engines. Steel fragments when it ruptures and creates shrapnel. Steel is also way too heavy to make an efficient engine.

@pyrogun1839

5 жыл бұрын

I understand your concerns. However, steel was the only option when I was making these. I couldn't afford to buy the aluminum motor cases, and I couldn't find any aluminum tubing/pipe to purchase so I could make my own. Additionally, I used cement as a nozzle/endcap which would fail before the steel case could explode and produce shrapnel. From my testing, steel did just fine. They sent rockets plenty high for me :)

This is how you get on a watch list

@pyrogun1839

4 жыл бұрын

Sure is! Maybe I should change the title 😂

@jahshuawhite3560

4 жыл бұрын

Naw you're probably good just don't associate with any groups advocating for violence

@pyrogun1839

4 жыл бұрын

@@jahshuawhite3560 Does the boogaloo fan club count? lol

@jahshuawhite3560

4 жыл бұрын

Yeeee fellow boog boi

@jahshuawhite3560

4 жыл бұрын

Contact info rocket boiiiiii

why the iron oxide???

@pyrogun1839

4 жыл бұрын

It increases the burn rate. More power.

I want to make same kind of fuel that easily flows into grain instead of scooping and pressing. What to do? I am adding little water and the mixture ends up not like yours.

@pyrogun1839

6 жыл бұрын

I use a 50/50 mixture of powdered/granulated potassium nitrate, granulated sugar, and iron oxide powder in the ratio 65/35/2. Don't use water (that's a different method) and as soon as the mixture has completely melted, pour it into the casting grains. Don't overcook it!

@arkamitra14

6 жыл бұрын

Pyrogun1839, What's that 50/50 mixture? Sorry, I couldn't get it. Kindly explain once more. I'm almost maintaining the same ratio i.e. 65:35 and 1 gm Iron Oxide for every 100 gm batch. But what's that first 50/50 that you've mentioned in the beginning?

@pyrogun1839

6 жыл бұрын

The 50/50 mixture is half granulated KNO3 and half powdered KNO3

cement... ok you just made a pipe bomb.. you are nuts

@DesertJeff

5 жыл бұрын

This is scary. Never this way.

@pyrogun1839

4 жыл бұрын

pipe bomb is totally enclosed. the pipe never has and never will explode because the cement will pop out releasing the pressure. thank you for showing your lack of knowledge

yo this kids dope sub up bois

@pyrogun1839

4 жыл бұрын

Thanks 😬

Woow your ginus

@pyrogun1839

6 жыл бұрын

MOSAB Public nah, just learned from other people and adapted some things 😁

Burmese🇲🇲👍😭😭🙏🙏🙏💖🤘

nice but the problem is than KNO3 is not available to buy...

@pyrogun1839

6 жыл бұрын

You can buy it on the internet ~$3 a pound or at hardware stores (Lowes/Home Depot) in the form of stump remover for ~$8 a pound.

@thelastsmith

6 жыл бұрын

Spectercide stump remover at Lowe's home depot no longer carries it

@pyrogun1839

6 жыл бұрын

Hmm, last time I checked it was still being sold at my local Lowes/Home Depot. Maybe it depends on where you live.

@muhammadaligujar2670

6 жыл бұрын

Same here in canada but i made it myself its harder to find iron oxyde for me

@LlamaGumby

6 жыл бұрын

put a piece of iron in water...

Sugar is not the only ingredient in confectioners sugar

@pyrogun1839

5 жыл бұрын

Yeah I found that out about a year ago. I've since switched to granulated sugar. The cornstarch in powdered sugar slows the burn rate quite a bit

@matthewitt2276

5 жыл бұрын

Pyrogun1839 I was wondering if it did. Cool vids man.

@pyrogun1839

5 жыл бұрын

@@matthewitt2276 yeahhh. Definitely handicapped some of my rockets 😂 and thanks!

@allensandven0

5 жыл бұрын

Is confection sugar same as powdered sugar? I don’t think it is ? None the less if it has cornstarch it effects the burn rate . So what does the iron oxides do?

You're coring tool is a little too big for that size motor. Get a smaller one if you want better performance.

@pyrogun1839

3 жыл бұрын

I think it's a pretty good size actually. If I used a smaller coring tool, the motor would take a bit longer to get up to full power. Also, I need a decent size core to insert my igniters all the way inside.

just hit it on the ground.. ok youre insane

@DesertJeff

5 жыл бұрын

With age comes wisdom. Just tap it on the ground? What if that nail sparked? Maybe, could happen, and your life!

@adrianjezierski8093

5 жыл бұрын

This, mine sometimes is hard to ignite with a lighter lol

@pyrogun1839

4 жыл бұрын

It's not a high explosive that ignites upon impact. It takes quite a bit of heat (open flame) to ignite.

Please, don't tell people to turn the heat to high. That's how you become liable for someone burning their face off. You don't need the heat that high

@pyrogun1839

6 жыл бұрын

You're correct, I should say to only turn it up as high as needed to melt the rcandy. With my burner, that happens to be high. Even when the mixture has landed directly on the burner, it has never ignited. Perhaps this brand of burner just doesn't get hot enough to auto-ignite rcandy. I'll take this into consideration when making possible future videos. Thank you.

@stdavross666

6 жыл бұрын

its not that bad Clay. Maybe you should tell mum.

@TheCrash8212

5 жыл бұрын

300 degrees

Please notify your school

@pyrogun1839

3 жыл бұрын

For what reason?