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Not completely Ducati related but I think some will appreciate
- Thread starter Dolkite
- Start date
Not too jump in here, but those look like 4 inch diameter rockets, that can't be too much thrust, certainly not in the thousands of pounds!?
I've had a little expereince with rocketry, but am by no means an expert, but if it is indeed a 4" rocket, at 12 feet long that makes it a very slender rocket with a fineness ratio of ~36!
I've had a little expereince with rocketry, but am by no means an expert, but if it is indeed a 4" rocket, at 12 feet long that makes it a very slender rocket with a fineness ratio of ~36!
Crazykid 55
New member
40,960 Newton Seconds of impulse = 1935lbs thrust for 5.1 seconds per motor. So perhaps not many thousands but certainly alot, that would be nearly 4000 lbs of thrust on his 848.
C
carve the canyon
Guest
That's pretty cool! I've researched CF a bit in the past but never had money and/or enough interest to start messing with it. Don't get me wrong or don't mean to piss anyone off but I've kinda grown tired of CF (my 848 still doesn't have any) except where I see it used in a benefical way... for instance my fav is multidirectional CF l even if I had body panels for instance I'd rather have MDCF painted with possibly unpainted areas. Items like your rockets seems a perfect fit for CF usage. My favorite use of CF is bikes (bicycles that is) frames and acessories. Prior to my carbon road bike I'd always liked steel frames better than other materials... although I haven't ridden Ti, so can't really state my option on it... Except I think it's an amazing material (i've had jewelry) also have an appeciation for it due to it's medical uses. Back to CF... one of my all time favorite bike accessories that I find incrediable beautiful would be a MDCF crank! http://www.nexternal.com/icycles/images/03133.jpg
or hell for that matter a full kit of Campy Record is pure sex!
http://www.thebikestand.com/record-group1.jpg
or hell for that matter a full kit of Campy Record is pure sex!
http://www.thebikestand.com/record-group1.jpg
Actually, that is completely untrue. Since the impulse of a rocket motor is (for a given propellant type) directly related the amount of propellant you can fit in the motor case (volume), the diameter of the motor scales on a second power while the length scales on a linear power.
(Volume= Pi / 4 * D^2 * L )
Also, a 40,000 Ns motor is damn big for 4" design. Most amatuer manufacturers (Cesaroni, Aerotech, etc...) max out at 20,000 Ns for a 4" diameter. Not to be picky either, but for 5.1 seconds, 40,960 N s = 1805 lbf.
Additionally, too slender of a motor messes up the gas dynamics of how the propellant burns and escapes through the nozzle (assuming is a core burning propellant).
But just talking about the rocket itself, which is what I was referring to as slender. But hey, if it works it works, I was just going by some rules of thumbs!
Nonetheless, that is a damn nice job of the CF body!
(Volume= Pi / 4 * D^2 * L )
Also, a 40,000 Ns motor is damn big for 4" design. Most amatuer manufacturers (Cesaroni, Aerotech, etc...) max out at 20,000 Ns for a 4" diameter. Not to be picky either, but for 5.1 seconds, 40,960 N s = 1805 lbf.
Additionally, too slender of a motor messes up the gas dynamics of how the propellant burns and escapes through the nozzle (assuming is a core burning propellant).
But just talking about the rocket itself, which is what I was referring to as slender. But hey, if it works it works, I was just going by some rules of thumbs!
Nonetheless, that is a damn nice job of the CF body!