LOC Onyx

LOC Onyx

Post by Gary Cockru » Thu, 02 Apr 1998 04:00:00



I've recently scratch-built a rocket similar to the LOC Onyx. The closer I
get to actual launch time, the more concerned I am about stability. I've
built many low- to mid-power rockets, but this is my first really stubby
one. It's designed to fly on 29/180-240 reloads. I don't have access to, or
knowledge of, any prediction programs. What I need to know is, does the
stock Onyx use nose weight, and if so how much? And does that weight go at
the very tip of the nosecone, or at the base? My rocket is 3" diameter, 31"
long (20" body tube, 11" nosecone). Has four rather large fins (7" root
edge) that are 1/4" thick (should produce enough extra drag to move
effective CP back somewhat). Any help would be greatly appreciated.

Thanks,
Gary***rum
NAR # 71940

 
 
 

LOC Onyx

Post by Bob Bernatch » Fri, 03 Apr 1998 04:00:00


My daughter has an Onyx, and it did not call for any nose weight.  She
hasn't flown it on anything bigger than an F40, though.

Regards,

Bob

NAR 29996

Quote:

>I've recently scratch-built a rocket similar to the LOC Onyx. The closer I
>get to actual launch time, the more concerned I am about stability. I've
>built many low- to mid-power rockets, but this is my first really stubby
>one. It's designed to fly on 29/180-240 reloads. I don't have access to, or
>knowledge of, any prediction programs. What I need to know is, does the
>stock Onyx use nose weight, and if so how much? And does that weight go at
>the very tip of the nosecone, or at the base? My rocket is 3" diameter, 31"
>long (20" body tube, 11" nosecone). Has four rather large fins (7" root
>edge) that are 1/4" thick (should produce enough extra drag to move
>effective CP back somewhat). Any help would be greatly appreciated.

>Thanks,
>Gary***rum
>NAR # 71940


 
 
 

LOC Onyx

Post by Tom Binfor » Fri, 03 Apr 1998 04:00:00


Quote:

> I've recently scratch-built a rocket similar to the LOC Onyx. The closer I
> get to actual launch time, the more concerned I am about stability. I've
> built many low- to mid-power rockets, but this is my first really stubby
> one. It's designed to fly on 29/180-240 reloads. I don't have access to, or
> knowledge of, any prediction programs. What I need to know is, does the
> stock Onyx use nose weight, and if so how much? And does that weight go at
> the very tip of the nosecone, or at the base? My rocket is 3" diameter, 31"
> long (20" body tube, 11" nosecone). Has four rather large fins (7" root
> edge) that are 1/4" thick (should produce enough extra drag to move
> effective CP back somewhat). Any help would be greatly appreciated.

> Thanks,
> Gary***rum
> NAR # 71940

The Onyx has no nose weight. Mine flew stable on any motor I put in it.
(Largest was a H70, about the weight of RMS 29/180.) Finally lost it on
a G208 that worked instead of exploding.
Tom
 
 
 

LOC Onyx

Post by Balthez » Sat, 04 Apr 1998 04:00:00


Quote:
Bob Bernatchez writes:
>My daughter has an Onyx, and it did not call for any nose weight.  She
>hasn't flown it on anything bigger than an F40, though.

Nice little rocket. Mine flew well on F50's but was lost to a too small field
on its second or third flight. I think you should have no trouble flying it on
any 29mm motor. It is nose heavy rocket.
--
Bruce Kirchner
TRA L1 #5888     NAR #69850
Michigan Team 1 HUVARS
Visit My Rocketry Home Page - http://members.aol.com/balthezar/index.html