CP for 7.5 inch LOC V2..?

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Greg Parent - 29 Nov 2004 16:41 GMT

Hello all,
I have been looking for information on the LOC Precision 7.5 inch V2
and am having a hard time finding Centre of Pressure data. Does anyone
know of a website with this information, a Rocksim file, a CP
calculator, etc.
I am at the point in the construction where its time to weight the
nose cone for the biggest motor (54mm CTI L730 I hope) and need to
know the CP to make sure the CG is in the right place.
Thanks for any help you may offer.
Greg

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Jerry Irvine - 29 Nov 2004 16:50 GMT

> Hello all,
> I have been looking for information on the LOC Precision 7.5 inch V2
[quoted text clipped - 6 lines]
> Thanks for any help you may offer.
> Greg

Find the CP of any other V-2 and scale it.

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Jerry Irvine, Box 1242, Claremont, California 91711 USA
Opinion, the whole thing. <mail to:01rocket@gte.net>
Please bring common sense back to rocketry administration.
Produce then publish. http://www.usrockets.com
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Bob Kaplow - 29 Nov 2004 18:35 GMT

>> Hello all,
>> I have been looking for information on the LOC Precision 7.5 inch V2
[quoted text clipped - 8 lines]
>
> Find the CP of any other V-2 and scale it.

Alas, that would only work if the other V2 had the same scale inaccuracies
as the kit you're modelling. Alas, most of the V2 kits compromise accuracy
somewhere.

    Bob Kaplow    NAR # 18L    TRA # "Impeach the TRA BoD"
        >>> To reply, remove the TRABoD! <<<
Kaplow Klips & Baffle:    http://nira-rocketry.org/LeadingEdge/Phantom4000.pdf
www.encompasserve.org/~kaplow_r/ www.nira-rocketry.org www.nar.org

You [should] not examine legislation in the light of the
benefits it will convey if properly administered, but in the
light of the wrongs it would do and the harm it would cause if
improperly administered -- Lyndon Johnson, former President of
the U.S.

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Jerry Irvine - 29 Nov 2004 18:42 GMT

> >> Hello all,
> >> I have been looking for information on the LOC Precision 7.5 inch V2
[quoted text clipped - 12 lines]
> as the kit you're modelling. Alas, most of the V2 kits compromise accuracy
> somewhere.

CP is vague enough that it is really close. IF the fins are close to the
same size and position.

General advise by Jerry on V-2's. Add a lot of nose weight. Like 30% of
rocket empty weight!

This should be in the FAQ.

Jerry

> Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD"
> >>> To reply, remove the TRABoD! <<<
[quoted text clipped - 6 lines]
> improperly administered -- Lyndon Johnson, former President of
> the U.S.

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Model Forum / General / Rockets / November 2004

CP for 7.5 inch LOC V2..?