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.

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Smart 10-year old!

I still use the cardboard cut-out method.

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Don
NAR 53455
"Carpe Diem"

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.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !

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.

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I love sanding.

Siblings named Gent and Merry; they were into watersports...


Bill

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It is well past time to Drill, Baby, Drill!

If your June, July, August and September was like this, you might just hate summer too...

Please unload your question before you ask it unless you have a concealed harry permit.

: countdown begin cr dup . 1- ?dup 0= until cr ." Launch!" cr ;

Give a man a rocket and he will fly for a day; teach him to build and he will spend the rest of his days sanding...

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

Dave F.

Here is an easily-downloadable PDF file of the equations ( below )

Dave F.

Attached Files

CENTER OF PRESSURE CALCULATIONS MADE EASY - BRUCE LEE.pdf (1.71 MB, 20 views)