Maserface Posted October 29, 2015 Posted October 29, 2015 For a while now I have wanted to poll the forum(s) about rocket tooling. I would like to develop a clearer sense of what tooling is being used for what, and where the red lines might start to be drawn.What I would like to know:1. Spindle dimensions (divergent, base of taper diameter, length of taper, end of taper diameter)2. Drift dimensions (convergent, if relevant)3. Propellants and loading pressures (etc) that you have used on said tooling (as descriptive as you are willing to be, please.)4. Tube specification (manufacture, waxed/unwaxed)5. Any other miscellaneous details that you will share about the construction. 6. I also would like to know about encountered failures, be it a CATO, or a rack roaster, and the tooling/propellant data to go along with it.Thrust data is always good, but all observations are welcome. donks
Col Posted October 30, 2015 Posted October 30, 2015 (edited) I`ll kick it off with a little one 0.5” id (short) coreburner Spindle dimensionsDivergent: 30 degrees,base of taper diameter: 7mm, length of taper: 45mm, end of taper diameter: 5.5mmDrift 1: convergent : 45 degrees, Drift 2: flatPropellant: hot 75/15/10 ball milled (willow) approx 9.8g, loading pressure: 5000psinozzle: 2.5g waxed bentonite clay.Tube: ½” id x 1/8" wall x 3.34” (85mm) long. Unwaxed. Homemade using 90gsm pure kraftpaper + casein/dex glue. Thrust Test Data (basic scale / vid cam + vid editing software):Peak thrust: 3.55kg (7.826 lb) Total motor burn time: 0.568 secondsFlight duration: 1.43 secondsVery nippy with consistently reliable performance. Never had one cato so far. https://youtu.be/Vrb0SQfwNfE https://youtu.be/SneqZSKnRA4 Edited October 30, 2015 by Col
Recommended Posts