{"id":98,"date":"2015-03-17T01:57:54","date_gmt":"2015-03-17T01:57:54","guid":{"rendered":"http:\/\/www.lunar.org\/wp\/?p=98"},"modified":"2015-03-18T16:38:44","modified_gmt":"2015-03-18T16:38:44","slug":"launch-site-dimensions-and-distance-to-launch-pad","status":"publish","type":"post","link":"http:\/\/www.lunar.org\/wp\/?p=98","title":{"rendered":"Launch site Dimensions and Distance to Launch Pad"},"content":{"rendered":"

This table is a combination of tables from the Model Rocketry handbook and\u00a0the\u00a0<\/span>\u201cLaws<\/a>\u00a0and Regulations for Transportation, Use and Storage of Fireworks<\/a>\u00a0in California<\/a>\u201d<\/p>\n

<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Equivalent Motor Type<\/td>\nMaximum Combined Total Impulse(N-Seconds)<\/td>\nMinimum launch Site Dimensions(Diameter in feet)<\/td>\nRadial Distance of Launcher from People(Feet)<\/td>\n<\/tr>\n
1\/2A<\/td>\n1.25<\/td>\n50 NAR\/CA<\/td>\n15 NAR, 30 CA<\/td>\n<\/tr>\n
A<\/td>\n2.5<\/td>\n100 NAR\/CA<\/td>\n15 NAR, 30 CA<\/td>\n<\/tr>\n
B<\/td>\n5<\/td>\n200 NAR\/CA<\/td>\n15 NAR, 30 CA<\/td>\n<\/tr>\n
C<\/td>\n10<\/td>\n400 NAR\/CA<\/td>\n15 NAR, 30 CA<\/td>\n<\/tr>\n
D<\/td>\n20<\/td>\n500 NAR\/CA<\/td>\n15 NAR, 30 CA<\/td>\n<\/tr>\n
E<\/td>\n40<\/td>\n1,000 NAR\/CA<\/td>\n30 NAR\/CA<\/td>\n<\/tr>\n
F<\/td>\n80<\/td>\n1,000 NAR\/CA<\/td>\n30 NAR\/CA<\/td>\n<\/tr>\n
G<\/td>\n160<\/td>\n1,000 NAR\/CA<\/td>\n30 NAR\/CA<\/td>\n<\/tr>\n
H<\/td>\n320<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, 1,500 CA#<\/td>\nSimple 100 NAR, Complex 200 NAR, 30 CA<\/td>\n<\/tr>\n
I<\/td>\n640<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, 2,500 CA#<\/td>\nSimple 100 NAR, Complex 200 NAR, 150 CA<\/td>\n<\/tr>\n
J<\/td>\n1,280<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, 3,500 CA#<\/td>\nSimple 100 NAR, Complex 200 NAR, 150 CA<\/td>\n<\/tr>\n
K<\/td>\n2,560<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, 5,000 CA#<\/td>\nSimple 200 NAR, Complex 300 NAR, 200 CA<\/td>\n<\/tr>\n
L<\/td>\n5,120<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, 7,000 CA#<\/td>\nSimple 300 NAR, Complex 500 NAR, 300 CA<\/td>\n<\/tr>\n
M<\/td>\n10,240<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, 10,000 CA#<\/td>\nSimple 500 NAR, Complex 1,000 NAR, 500 CA<\/td>\n<\/tr>\n
N<\/td>\n20,480<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, 15,000 CA#*<\/td>\nSimple 1,000 NAR, Complex 1,500 NAR, 1,000 CA*<\/td>\n<\/tr>\n
O<\/td>\n40,960<\/td>\n> of 1,500′ or 1\/2 expected altitude NAR, Not Legal in
\nCA<\/td>\n		Simple 1,500 NAR, Complex 2,000 NAR, Not Legal in CA<\/td>\n<\/tr>\n
>O<\/td>\n>40,960<\/td>\n> 1,500′ or 1\/4 altitude<\/td>\nFAR101.22<\/a>c Class 3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

* <\/em>Complex rockets up to 20,480NS are legal in CA. Simple rockets\u00a0must be under 10,240NS.
\n#Waivered flights require that the launcher is 1500′ from any occupied structure whereas unwaivered rocketry, the launcher can be anywhere inside the launch site\u00a0to\u00a0optimize\u00a0use of the prevailing winds.
\nSimple<\/em> is a single\u00a0motored rocket.
\nComplex<\/em> is a multi motored rocket.<\/p>\n

CA State Fireworks regulations doesn’t define how the Min Launch Site\u00a0dimensions is measured, so I used the Model Rocketry handbook definition. Nor\u00a0does the\u00a0CA State Fireworks\u00a0regulations define how to use “…estimated altitude likely to be achieved\u00a0by the rocket..” in launch site dimensions. The Model Rocketry handbooks\u00a0says “… shall be not less than one-half the maximum altitude<\/em>..”\u00a0I interpret this to mean the above table is minimum unless you fly higher than\u00a0double launch site diameter. The Model\u00a0Rocket Safety Code <\/a>does not include\u00a0expected altitude in it’s launch site size calculation. The High\u00a0Power Rocket Safety Code<\/a> of March 2006\u00a0now includes expected altitude as part of launch site dimensions.<\/p>\n

From State Fireworks Regulations, Title 19, California Code of Regulations,
\nChapter 6 Article 17. Model Rockets<\/strong> (Applies only to FAA waivered activities,\u00a0unwaivered isn’t addressed.)<\/p>\n

\u00a71037. Launch Site Standards<\/p>\n

    \n
  1. The launch site shall consist of a launching area and a recovery area.\u00a0The launching area shall consist of an area surrounding the launching devices\u00a0a\u00a0radial distance from the launching device as specified in Table above. The\u00a0recovery area shall consist of the launching area and the minimum area necessary\u00a0to retrieve\u00a0the rocket, based on the estimated altitude likely to be achieved by the rocket.\u00a0These calculations shall take into account the weight of the rocket and\u00a0the\u00a0specific type of motor used (or combined total impulse). Table above shall\u00a0be used to determine the minimum launch site dimensions for the various classes\u00a0of experimental high power rockets.<\/li>\n
  2. The launch site shall not be located in any grain field, dry grass, brush\u00a0or forest covered lands.<\/li>\n
  3. The launch site shall not contain any buildings or structures, unless specifically\u00a0approved in advance by the authority having jurisdiction, and under no circumstances\u00a0shall such buildings or structures be less than one thousand five hundred feet\u00a0(1,500 ft.) from the launch site.<\/li>\n
  4. The launch site shall not contain any high voltage electrical lines or\u00a0major highways.<\/li>\n
  5. The launch site shall not contain any natural or artificially constructed\u00a0obstacle deemed by the authority having jurisdiction to pose a hazard during\u00a0launching.<\/li>\n
  6. The launching area shall be located as near as possible to the center of\u00a0the launch site but in no case less than seven hundred fifty feet (750 ft.)\u00a0from the boundary of the launch site.<\/li>\n
  7. The launching area shall have appropriate barriers around it such that\u00a0spectators will be restrained from encroaching upon it. These barriers may be\u00a0of any type approved by the authority having jurisdiction.<\/li>\n<\/ol>\n

    From the Model Rocketry Handbook<\/h2>\n

    4.9.1 For a circular area, the minimum launch site dimension shall be the diameter,\u00a0and for a rectangular area it shall be the shortest side.<\/p>\n

    4.9.4 As an alternative to the minimum launch site dimensions of the above\u00a0table, the size of the launch site shall meet one of the following criteria:<\/p>\n

      \n
    1. It shall be not less than one-half the maximum altitude as stated by the\u00a0manufacturer for the model rocket and motor(s) combination being flown.<\/li>\n
    2. It shall be of a size approved by the authority having jurisdiction based\u00a0on flight demonstration or data required to substantiate the anticipated altitude.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

      This table is a combination of tables from the Model Rocketry handbook and\u00a0the\u00a0\u201cLaws\u00a0and Regulations for Transportation, Use and Storage of Fireworks\u00a0in California\u201d<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-98","post","type-post","status-publish","format-standard","hentry","category-rules-and-regs"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/98","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=98"}],"version-history":[{"count":6,"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/98\/revisions"}],"predecessor-version":[{"id":121,"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/98\/revisions\/121"}],"wp:attachment":[{"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=98"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=98"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.lunar.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=98"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}