CP of Multiple Body Rocket

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Devin Charles - 15 Aug 2007 04:37 GMT

I am currently working on a rocket with the general design form of a
Delta IV Heavy (e.g. Having two large pods on the side of the main
body). I have looked around for ways to compute the CP of rockets with
multiple bodies (e.g. multiple tubes). I havent found anything on the
subject, nor do I think that the readily available programs (e.g. VCP
and ROCKSIM) are able to compute that problem. Would a cardboard
cutout be able to approximate this? Are there equations to compute
this? Is there a program that has this capability?

Reply to this Message

Roger Smith - 15 Aug 2007 12:50 GMT

>I am currently working on a rocket with the general design form of a
> Delta IV Heavy (e.g. Having two large pods on the side of the main
[quoted text clipped - 4 lines]
> cutout be able to approximate this? Are there equations to compute
> this? Is there a program that has this capability?

There's an ongoing discussion of a 1/128th scale Delta IV in The Rocketry
Forum. It inculdes some talk about the CP:

http://rocketryforum.com/showthread.php?t=37464&highlight=delta+iv

Carl, who has the user name Delta-IV in the above conversation, works on the
real Delta-IV and has built a couple of very nice flying models of the
Delta.

Here's a video of his Delta IV Heavy in flight:

http://www.payloadbay.com/gallery/v/movies/delta_001.wmv.html

.. and a lift-off photo of his Delta IV Medium:

http://www.payloadbay.com/gallery/v/rock/2006-10-07-ROCK-Launch/2006-10-07+ROCK+
Launch+265.jpg.html

-- Roger

Reply to this Message

terry6969@aol.com - 15 Aug 2007 17:18 GMT

> There's an ongoing discussion of a 1/128th scale Delta IV in The Rocketry
> Forum. It inculdes some talk about the CP:
>
> http://childrensforum.com/showthread.php?t=37464&highlight=delta+iv

if the man had wanted a trf answer he would have posted on trf.

Reply to this Message

Model Forum / General / Rockets / August 2007

CP of Multiple Body Rocket