[roc-chat] Re: New 'mass launch' rules

  • From: "Tom Hanan"<tom.hanan@xxxxxxxxxxxxxxx>
  • To: roc-chat@xxxxxxxxxxxxx
  • Date: Fri, 20 Apr 2012 20:15:27 -0700

So much for our mass mythbusters launch:'(

Best regards,
Tom


-----Original message-----
From: Rick Dickinson <rtd@xxxxxxxxxxxx>
To: roc-chat@xxxxxxxxxxxxx
Sent: Sat, Apr 21, 2012 03:02:23 GMT+00:00
Subject: [roc-chat] Re: New 'mass launch' rules

I'll talk to Trip and a couple of the other NAR trustees this weekend, and lobby hard for some sanity, in that case. This is silly.
--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

JACK GARIBALDI <JackGaribaldi@xxxxxxx> wrote:
That is lame so if an Alpha was to go to 1000ft like Wedge said them 10 of them would require a 1500ft safe distance and there will be very few clubs putting 10 Alphas now at 1500 ft safe distance I don't even think Trip's club will accommodate that so the underlined is they want to do away with mass launching. I will rally for Tripoli not to follow suit.
Jack



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
> 
> 
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