Recent content by Andy24

Thanks for your response.. I understand now. I actually calculated the velocity based on some ground testing (where I found out the impulse of the motor) and was hoping to incorporate drag.. This may give you context...

Hello! I am predicting the peak altitude of a model rocket based on some ground tests. I know that Total Force on the rocket=Thrust-mg-kv^2 but am stuck as to which value for 'v' to use? Is it the velocity of the rocket with the effects of gravity and air resistance taken into account or the...

k='drag constants'=(1/2)*rho*A*Cd Using the formula: Apogee(in acc stage)=(mass/2k)ln((T-mg)/(T-mg-kv^2)) as seen on the site, you actually need the velocity (incl. the effect of drag) to determine the height. So there are actually 2 unknowns as I only have the average velocity without the...

Thanks heaps boneh3ad, I found this pdf which explores it perfectly I think: http://www.rocketmime.com/rockets/RocketEquations.pdf (it's the first worked equation on the pdf). Is this along the lines of what you were thinking?

I'm in grade 12 math B and C (the two advanced high school math's), so I've done a decent amount but nothing crazy.

Hello everyone, I am predicting the altitude of a model rocket based on some testing I did where I found the impulse of a little single stage model rocket motor. I am wondering how to incorporate drag into my calculations to make it more accurate. I know D=Cd*rho*v^2*A and I can definitely find...