Really Powerful R-candy Rocket Tests

These were three rockets using 3 different fuels based on sugar and KNO3.
1st using just plain KNO3 and Sugar Fuel
2nd using the same fuel with 5g of Sulfur added.
3rd using the same fuel with 5g of Sulfur and 10g of Aluminium Added.

They were all stable burns though the smoke trail on the third test was very unstable and sputtered.

Category:

Science & Technology

Tags:

• really
• powerful
• high
• power
• candy
• flame
• sugar
• rocket
• apcp
• launch
• test
• aluminium
• sulfur
• epoxy
• kno3
• potassium
• nitrate
• 80
• explosion
• boom
• explosive
• tnt

[rhelbren]

How did you measure the velocity of the exhaust?

As for the sulfurs effect on the propellant it acts as a catalyst and lowers the ignition temperature (as I have learned in my experiments with flash powder) a common Ratio for Nitrate flash is 5:3:2 (KNO3:S:Al) I would use the finest aluminum you could find, try Pyrotechnics companies online like Skylighters or Starmolecule <---(that's all they sell)

and if you don't melt it first before casting your grain i would highly recommend it .

[rmoss15]

@rhelbren The effective velocity of the exhaust is found by dividing the total impulse (Ns) of the motor by the mass in kilograms of fuel that is burned in the test.

[BuddytheChimp]

I feel stuipid asking this, and im probaly not gonna get a responce. But what would happen if you didnt add sulfer, just aluminum

[rmoss15]

@BuddytheChimp When only aluminium is added, the fuel does not seem to burn hot enough to ignite it or doesn't supply enough oxygen when in a motor casing to support combustion. It may also be that the sulfur reacts with the aluminium in some way that causes it to combust. Either way, without the sulfur the aluminium doesn't ignite but i'm not exactly sure why.

[DAFANNIN]

did you have an excess of kno3? The Al plus some finely powdered iron oxide incorporated first, will increase the temp of the fuel. This may cause peak pressures above your design.

[rmoss15]

@DAFANNIN yes a slight excess of KNO3 was used in this propellant

[BonzoMadrid1]

Compacted or cooked??

[AnonOPify]

First of all amazing,subbed and liked second what casing did you use and how did you make it thanks!!!

[XBiteABulletX]

what was you nozzel?

[Morganive]

@rmoss15 Can you tell me how you prepare the fuel, and the ratio? I don't know what's more effective, the fuel that you just mix in powdered form, or the one that you combine homogenously?

[MrBomboys]

i liked the last one