Aleta wrote: AJ> A solid, yes. But as Dick Rutan will tell you, the EZ-Rocket is a smooth AJ> ride.
AJ> Aleta Normally liquid engines run smoother than solid motors. Yet vibration level of a craft depends not only on the smoothness of the engines, but also on how thrust compares to the weight of the craft. If in the case of the EZ-rocket plane, we assume a mass of 1600lb and a trust of 800lb thrust/weight will be 0.5 . Mounting the same engines in a rocket weighting 160lb (to have an initial acceleration of 4g) would bring trust/weight to 5 and the vibration level could be 10 times worse. Hans mailto:[EMAIL PROTECTED] http://www.spl.ch _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
