Wich sponge titanium for dilay in 1LB rocket

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Hi

 

I finished to dial in the fuel on my 1lb engines and now im looking for a nice tail.

 

I have sponge titanium in 100-250um or 450-1000um

or

Al atomized 325mesh

 

What should i use and is it good to use a 1/10 ratio?

 

I run a nozzleles setup

 

Thanxs in advance for your help

[AdmiralDonSnider]

I figure your Ti material is a bit on the coarse side of things. Very fine Ti powder is best. And 10% seems plenty. 3% or even less I would guess is best. But others may help you with better input on both.

[DubaiAmateurRocketry]

around 5% is enough, Ti is not a good fuel, Aluminum would give better sparks.

[Col]

You only want it in the delay fuel above the spindle. Adding 10% of 50 mesh ti sponge will give you a nice white tail.

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Thanxs for the answers

 

AdmiralDonSnider

100-250um is betwenn 60to140mesh size this isnt really coarse in my opinion.

 

DubayAmateurRocketry

I ad the 100-250um sponge in my endburners after the spindle without any problems in addiction to milled BP

 

Col

Sure, i will only ad ti above the spindle just in the delay so i think i will try it out with the 100-250um to see how it looks.

[Mumbles]

I have no clue what DubaiAmateurRocketry is talking about. The aluminum will give no sparks what so ever. The titanium will be fine. You don't want the metal to be a good fuel. You want it to burn up in the air, not the motor.

 

I'd go with the 100-350 micron stuff. I bet it will work great.

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Thanxs Mumbles

 

I will do a video of it and post it after this weekend.

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Here is the video.

Worked pretty good