slm ckgu...
sy nk minta pndpt dan idea ckgu ni...
boleh tak bg tips ckit cmne nk buat roket payung terjun yang baik??
roket sasaran i/Allah sy boleh buat tp roket satu lg tu sy msh lemah...
kdg2 x terbukak...kdg2 tu sekejap je...xsmpi 30saat pn..
sy dh bc blog ckgu tp msh kurg jelas...
Dr,
ziman zeman
Kalau ada yang nak berkongsi pendapat sila hubungi saya....
Cara mengira saiz paracut yg sesuai untuk roket....
formulas provided below will calculate an estimated parachute size that will result in a descent rate of about 15 feet per second. If the landing area is hard, such as packed earth or salt, a slower descent rate may be desired to prevent damage to the rocket.
Circular Parachute size in inches = sqrt( rocket_weight_in_pounds * 0.454 ) * 39.6
Example of a 5 pound rocket: sqrt( 5 * 0.454 ) * 39.6 = 59.7" (60" parachute)
X-Form Parachute size in inches = sqrt( rocket_weight_in_pounds * 0.454 ) * 51.5
Example of a 5 pound rocket: sqrt( 5 * 0.454 ) * 51.5 = 77.6" (78" parachute)
A smaller parachute will result in a faster descent. A larger one a slower descent. If the ground is soft, such as grass covered, you may want to use a smaller parachute for a faster descent. A faster descent will result in less drift. If the ground is hard, like frozen earth or salt, you may want a slower descent, and therefore a larger parachute.Submitted by Dean Roth
Cara membina paracut
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