[Rockets] [RocketsNW] OROC Wilsonville model launch this Saturday, March 8, 12 to 3pm

[Keith Packard]

Dennis S Winningstad <winningstad at comcast.net> writes:

> Keith, the age old question comes to mind. Please be patient enough to
> answer me as I forget!
>
> If my motor is bigger than "D" but the flight only goes 500 or 600' up
> (think flying saucer) why isn't that ok?

NAR doesn't care how high your rocket "will" go; all field sizes are
based purely on motor size in the model rocket safety code.

http://www.nar.org/NARmrsc.html

Here's the relevant table from that document:

LAUNCH SITE DIMENSIONS
Installed Total Impulse (N-sec) Equivalent Motor Type Minimum Site Dimensions (ft.)
0.00--1.25                            1/4A, 1/2A               50
1.26--2.50                                A                   100
2.51--5.00                                B                   200
5.01--10.00                               C                   400
10.01--20.00                              D                   500
20.01--40.00                              E                 1,000
40.01--80.00                              F                 1,000
80.01--160.00                             G                 1,000
160.01--320.00                          Two Gs              1,500

So, if we had just another 200', we'd be able to fly up to G
motors. Don't ask me to explain the rules, we just need to follow them.

-- 
keith.packard at intel.com
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 810 bytes
Desc: not available
URL: </pipermail/rockets/attachments/20140303/c4b78e71/attachment.sig>