Classificazione motori per razzimodellismo

I motori per razzimodellismo sono classificati con il valore dell'impulso totale designato con una lettera, da A (il più piccolo, ½A, ¼A, ⅛A) fino a O, il più grande. La classe A va da 1.26 Ns a 2.5 N·s, ogni classe successiva ha un valore doppio della precedente, per esempio classe B tra 2.51 a 5.00 N·s. Motori oltre la O sono al di fuori del campo amatoriale, e sono utilizzati da organizzazioni commerciali o governative.

Esempio, la lettera M rappresenta un impulso totale compreso tra 5,120.01 e 10,240.00 N·s.

Impulsi secondo la classe

Classe	Impulsi totali (SI)	Impulsi totali (Sistema imperiale britannico)	Veicoli aerospaziali o Razzi	Regolamenti US
A	1.26–2.5 N·s	0.28–0.56 lbf·s
B	2.51–5.0 N·s	0.56–1.12 lbf·s
C	5.01–10.0 N·s	1.13–2.25 lbf·s
D	10.01–20.0 N·s	2.25–4.50 lbf·s
E	20.01–40.0 N·s	4.50–8.99 lbf·s
F	40.01–80.0 N·s	8.99–17.98 lbf·s
G	80.01–160.0 N·s	17.99–35.97 lbf·s
H	160.01–320 N·s	35.97–71.94 lbf·s
I	320.01–640 N·s	71.94–143.88 lbf·s
J	640.01–1,280 N·s	143.88–287.76 lbf·s
K	1,280.01–2,560 N·s	287.76–575.51 lbf·s
L	2,560.01–5,120 N·s	575.51–1,151.02 lbf·s
M	5,120.01–10,240 N·s	1,151.02–2,302.04 lbf·s
N	10,240.01–20,480 N·s	2,302.05–4,604.09 lbf·s
O	20,480.01–40,960 N·s	4,604.09–9,208.17 lbf·s
P	40,960.01–81,920 N·s	9,208.18–18,416.35 lbf·s
Q	81,920.01–163,840 N·s	18,416.35–36,832.70 lbf·s
R	163,840.01–327,680 N·s	36,832.70–73,665.39 lbf·s
S	327,680.01–655,360 N·s	73,665.40–147,330.79 lbf·s
T	655,360.01–1,310,720 N·s	147,330.79–294,661.58 lbf·s
U	1,310,720.01–2,621,440 N·s	294,661.58–589,323.16 lbf·s	Apollo launch escape rocket
V	2,621,440.01–5,242,880 N·s	589,323.16–1,178,646.31 lbf·s
W	5,242,880.01–10,485,760 N·s	1,178,646.31–2,357,292.62 lbf·s
X	10,485,760.01–20,971,520 N·s	2,357,292.63–4,714,585.25 lbf·s
Y	20,971,520.01–41,943,040 N·s	4,714,585.25–9,429,170.49 lbf·s	Delta II
Z	41,943,040.01–83,886,080 N·s	9,429,170.50–18,858,340.99 lbf·s
2Z	83,886,080.01–167,772,160 N·s	18,858,340.99–37,716,681.97 lbf·s
3Z	167,772,160.01–335,544,320 N·s	37,716,681.97–75,433,363.94 lbf·s
4Z	335,544,320.01–671,088,640 N·s	75,433,363.94–150,866,727.88 lbf·s
5Z	671,088,640.01–1,342,177,280 N·s	150,866,727.89–301,733,455.77 lbf·s	Space Shuttle SRB
6Z	1,342,177,280.01–2,684,354,560 N·s	301,733,455.77–603,466,911.54 lbf·s

Voci correlate

• Razzimodellismo

Collegamenti esterni

• National Association of Rocketry (NAR) - Model Rocketry and High-Powered Rocketry Certifications, su nar.org.
• Tripoli Rocketry Association (TRA) - Amateur High-power rocketry Certifications, su tripoli.org.
• Canadian Association of Rocketry (CARWeb) - Model Rocketry and High-Powered Rocketry Certifications in Canada, su canadianrocketry.org.