I just need any information that any of u have on makeing a good explosive from rocket motors (i dont want kewl info tho)

Estes rocket engines are in several different kinds

A , B, C , D

D's will give you the most black powder.

You can use that powder to fill a C02 cartarge to make a cratermaker.

Estes rocket engines, all have 3 stages:
-thrust (black powder)
-delay (smoke stuff)
-eject (coarse black powder)

BUT there is one type that Is one that I commonly use that is called a C-6-0 It has 2 stages:
-thrust (black powder)
-eject (coarse black powder but with no clay)

The advantage of a C-6-0 is that it can light another rocket (so that would be a 2 stage rocket).

So what you can do is stick a cratermaker on top of a C-6-0, and you got yourself a rocket propelled cratermaker!

Provided it flies properly.

When I used rocket motors, back in the dark ages, I used C-6-3 motors. They give you the most powder for your dollar, since the D motors are exponentially more expensive, especially when you consider the amount of powder you get from them.

Use a hacksaw to cut a slot in the cardboard casing of the engine, lengthwise, Peel the paper off in a spiral until you are left with a hard black thing. This is solidified black powder. The grey parts are clay and should be discarded.

I grind engines by putting them in plastic bags and beating them to hell with a hammer. Don't worry- Engine powder is not shock sensitive.

IT will take about two C size motors to fill a nitrous oxide cartridge, and probably three or so to fill a CO2 cartridge.

~Zero the Inestimable

k im confused now i dunno what ones to buy so i will buy them both and find out myself is there any way to make them more powerfull?

just get a c engine i would say there the best for your money like every one else said they should be around $4-7 depending on were you live for me i live in a place called st.albert and they are only 5 bucks for a pack of three so its a good deal