On Wed, 2003-10-01 at 13:18, Jonathan A Goff wrote: > Pierce Nichols wrote: > >> No. Relatively small perturbations, including relatively slow pitch >> changes, could start a little bit of slosh going. If the slosh >> frequency is resonant with the lag in the control system,
I just can't see where this will be a problem. > Since POGO isn't supposed to be pushing the envelope yet for mass ratio, > could you just put > some simple baffles into the tank to reduce/eliminate sloshing? I'm > thinking you could likely > get by with some screen (made of stainless or aluminum), or thin sheets > of Polyethylene. What > are the tanks made of? We could, POGO has some room in the design at this point, and I have thought about adding baffles. I would like to point out that we are aiming for a specific mass on POGO. Not so much that the vehicle requires it, but to get us (ERPS) thinking about mass budgets and develop good habits and processes for when our vehicles require mass constraints. BTW mass is targeted for 20kg dry and 27kg of propellant. > Or you could just do that. It should work fine. If you want though, > there's a book in the local > library on rocket propellant tanking. IIRC it has a chapter on > calculating slosh effects, etc. If > you would like, I could probably sink a half hour or so into mining some > equations from it for > you (or I could send you some photocopies, or something). That would be great. Giving us a title and author would be a good thing as well. Thanks, Dave -- David Masten <[EMAIL PROTECTED]>
signature.asc
Description: This is a digitally signed message part
_______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
