Well, I'll go back and review this. Allen Terseness and mis-spelling courtesy of my iPhone On Apr 20, 2012, at 7:46 PM, David Erbas-White <derbas@xxxxxxxxxxxxxxxx> wrote: > On 4/20/2012 6:42 PM, Allen H Farrington wrote: >> >> 3) Safe Launch Distance for Spectators and Participants >> This is the one that is being modified. There are defined distances in both >> NFPA 1122 and 1127 for how far you have to be from a launch pad when you >> ignite the motor. This distance ranges from 15 feet to nearly 1500 feet >> depending on impulse. For complex rockets, the distances are "one impulse >> level higher" if you look at the table. This works out to be about 1.5 >> times. Since ROC uses a range layout that allows folks to be at one set of >> pads while the other are launching, we have a range layout that accommodates >> these distances. (except for the aforementioned M-to-M, 2 stage, Mass >> Launch). In any case, the absolute maximum distance required for any >> combination in CA is about 1/2 a mile (2250 ft). Other states allow larger >> impulses and therefore their ranges might be larger. >> > > Allen, > > First, a TREMENDOUS thanks for all that you and the rest of the board are > doing for ROC. > > Second, here is the exact wording of the new safety code (i.e., the wording > of the change): > > "When conducting a simultaneous launch of more than ten rockets I will > observe a safe distance of 1.5 times the maximum expected altitude of any > launched rocket." > > In the course of the discussions on the NAR group, and apparently as part of > NFPA as well, this DOES mean that (at least for model rockets), that rather > than being 15 feet away from a launch of a single Alpha, one would have to be > 1.5 times the distance of the maximum expected ALTITUDE (not the previous > safety distance) for a launch of more than ten rockets. > > Note that this would affect some of our current activities, even with some of > the sparsely attended launches. We sometimes launch the entire front row if > we're getting backed up -- this rule will now prevent this from being > possible (though we could launch up to ten rockets at a time). > > David Erbas-White > > > -- > ROC-Chat mailing list > roc-chat@xxxxxxxxxxxxx > //www.freelists.org/list/roc-chat > -- ROC-Chat mailing list roc-chat@xxxxxxxxxxxxx //www.freelists.org/list/roc-chat