What is the length of the parachute
section in inches ?
How many PSI of pressure do you
This calculator is meant to
give you an idea of how much BP to use in your ground tests. You should
always start ground testing with the smallest amount that you feel might work.
Also, note that PML "Piston Ejection Systems" require even less pressure than
traditional systems. To calculate how much PSI your rocket requires, see
You need Grams of FFFFG Black Powder
10 to 15 PSI is a good range for safe parachute ejection for a 4 inch
How much PSI will my rocket need ?
What is the diameter of the
parachute section in inches ?
PSI for a lose
PSI for a
tighter fitting parachute in my calculator above.
For more information about PSI recommendations and to see what my PSI
calculations are based
read this article
at Rocketry online.
Email me your