MANUAL Calculation Of CENTER OF PRESSURE . . .
 

Back in the day, circa 1995, a Tripoli rocketeer, named Bruce Lee, developed a simplified method to manually calculate Center of Pressure.

His 10-year old son was able to do the computations with ease.

Dave F.

Smart 10-year old!

I still use the cardboard cut-out method. :eek:

DEFINITELY, a LOT SMARTER than what today's "Schools" are turning out !

Dave F.

Nothing wrong with that, as it is very "conservative" about CP location.

It gives a "safe" CP location ( FORWARD of its ACTUAL location ) . . .

The "downside" to the Cardboard Cutout method is that it "calls for" extra Nose Weight, which reduces performance and creates an "overstable" situation.

Dave F.

Does this Bruce Lee also have a sister named Ugh ?

I don't ever bother with CP calculation. I just fly it. If it flies ok, the CP/CG relationship is ok too. :chuckle:

That gave me a "flashback" to my youth . . . Home-made fireworks, labelled with a felt-tip marker "Light Fuse & Run Like Hell" . . . LOL !

Dave F.

Their relationship may seem ok, but they still need a chaperone.

this is what OpenRocket is for. or RockSim or RASAero 2

Chaperone nuthin'
We dun't neeed no steeenkingg chaperone!