ferrotitanium added to the composition of black powder rockets

[superspike23]

hi,

Can we add ferrotitanium at mixture (60-30-10) rocket engine?

 

If yes, how much is recommended?

I'd like to get a nice trail.

 

[pyrokid]

With cored rockets you want to limit the addition of metals to the portion of the fuel that is located above the spindle. Many people feel that ramming metal around the spindle is too risky. You still get a metallic tail from launch, and it's much safer than using metal in all the composition.

[superspike23]

you mean you need to add the feti powder delay only?
I knew he should not pack the composition when it contains metals.

But how close the top of the engine?

[FlaMtnBkr]

Yes, delay only. From top of spindle to top of motor can contain metal if you want.

 

Having it around the spindle could potentially caused ignition by being pinched between metal. Plus it tears up your tooling.

 

When the motor burns, it burns along the core and then out. So at the top of the spindle, in the delay, a hemisphere with a radius the same as the tube burns during the thrust phase. So this material above the spindle, if it contains spark producing material, will burn and create sparks from the start to the finish of the thrust producing phase and then also during the delay portion which is obvious.

[schroedinger]

Have a look at Ben's site on his tutorial about making a white tailed rocket

[superspike23]

I can not find a link to the ben's site.

 

can you give me?

thx

[FlaMtnBkr]

http://www.firesmithtools.com/

[superspike23]

http://www.firesmithtools.com/

thank you