#### shockie

##### High Plains Drifter

.

it states: [the] "ratio is determined simply by taking the rocket weight(loaded with motors) in pounds and multiplying by 22.25 to get minimum required motor thrust in Newtons (N)."

I would like to try and redo some of these charts that are more designed towards model rockets , ie less than 1lb.

If I wanted to calculate the T/W ratio for a model rocket that weighed 1 oz the calculation would be be:

1/16 oz = 0.0625 lb

so 0.0625 lb X 22.25 = 1.41 Newtons . So is this example telling me the T/W ration is 1.41?

Ok this website says: " Note this is the motor thrust off the pad, not the motor total thrust."

OK how does this "total thrust off the pad" relate to an motor's Average Thrust and its Peak/Max Thrust.

for example, lets say this 1 oz rocket has an A8-3 in it. According to the NAR motors listing , at its Peak/Max thrust is 9.6 N and the average thrust is 4.03 N

Can somebody help me understand this? Does either OpenRocket or Rocksim tell you this information?

TIA