- Joined
- Jan 30, 2016
- Messages
- 8,995
- Reaction score
- 3,523
Just don't show to the hypersensitive rules people...
Put it in a casing, widest nozzle there is, presto: it's an EX G2.3 motor ( or whatever ).
Last edited:
Just don't show to the hypersensitive rules people...
Just don't show to the hypersensitive rules people...
Have you used these before? Wondering how hot they get.
No, not really hot at all and lots of smoke. I'm considering for my 3/4 Scale Nike Smoke nosecone vents. My former son-in-law showed them to me. He works for an HVAC company. They sit the grains inside a exit or return vent and light them to observe the air flow. I posted a 90 second one, but I think they have up to like 3 minutes in duration.
Most recent Tripoli Report covers just exactly this.I simply use the longest delay grain available for the 38's and use electronic deployment. Depending on the flight, I see smoke past apogee. A full size/diameter smoke grain likely is going to heat soak a case possibly damaging it.
But, if one did like a 54mm diameter grain encased in an insulator for say a 75mm motor, that is workable and I bet folks have already done that with success.
Ever notice how the commercial smoke delays are put in thick walled cardboard tubes in the forward closures? It's called insulating and I bet that can be applied to larger smoke grains. Kurt
Colored smoke, "smoke bombs", are typically a fuel rich sugar chlorate mix with dyes added to give color. In operation the sugar chlorate vaporizes the dye and it cools and condenses into very small particles. Issues are if to hot the organic dye decomposes giving no color, and if it comes out of the container too hot it can ignite and burn in the air.I tried one in a 38mm motor to get colored smoke, placed in the smoke well, it got consumed during the motor burn, no smoke.
I plan to try it again , but this time pour a web thickness propellant slug on top of it to insulate it during the motor burn, hoping that will do the trick.
My homebrew attempts at achieving colored smoke have all failed dismally so far.
Colored smoke, "smoke bombs", are typically a fuel rich sugar chlorate mix with dyes added to give color. In operation the sugar chlorate vaporizes the dye and it cools and condenses into very small particles. Issues are if to hot the organic dye decomposes giving no color, and if it comes out of the container too hot it can ignite and burn in the air.
If used in a rocket motor the burn rate under pressure of chlorate mixes is to high and grain is consumed before propellant grains.
M
Enter your email address to join: