More about that LOC Onyx.... (stability)

More about that LOC Onyx.... (stability)

Post by Quinste » Sun, 03 May 1998 04:00:00



I'm done building my LOC Onyx and want to hurry up and launch it, but have some
stability questions.  I've heard that this isn't a very stable rocket (and
obviously, being so short and fat), so I want to get its speed up fast before
it clears the rail.  Knowing this, a motor like the F50 would be good (better
than, say an F25)?  Still, I'm tempted, for the first flights at least, just to
buy a 3-pack of D12-3's because they're so much cheaper.  The instructions say
you can use a D12-3, although it is the smallest one listed.  
Any experience out there launching an Onyx on a D12?  

 
 
 

More about that LOC Onyx.... (stability)

Post by Tom Binfor » Sun, 03 May 1998 04:00:00


Quote:

> I'm done building my LOC Onyx and want to hurry up and launch it, but have some
> stability questions.  I've heard that this isn't a very stable rocket (and
> obviously, being so short and fat), so I want to get its speed up fast before
> it clears the rail.  Knowing this, a motor like the F50 would be good (better
> than, say an F25)?  Still, I'm tempted, for the first flights at least, just to
> buy a 3-pack of D12-3's because they're so much cheaper.  The instructions say
> you can use a D12-3, although it is the smallest one listed.
> Any experience out there launching an Onyx on a D12?

It WILL fly on D12-3's (and any other motor that fits) withought any
added nose weight.
Tom

 
 
 

More about that LOC Onyx.... (stability)

Post by Balthez » Sun, 03 May 1998 04:00:00


Quote:

>It WILL fly on D12-3's (and any other motor that fits) withought any added

nose weight.<

I would have never considered flying mine with a D12 since the Onyx is a fairly
heavy rocket. Should make for a cool low level flight. Whoosh-pop! Flies like a
bat out of hades on a F50. Sure wish I wouldn't have used that motor in such a
small field.
--
Bruce Kirchner
TRA L1 #5888     NAR #69850
Michigan Team 1 HUVARS
Visit My Rocketry Home Page - http://members.aol.com/balthezar/index.html

 
 
 

More about that LOC Onyx.... (stability)

Post by Spark » Sun, 03 May 1998 04:00:00


Quote:

> I'm done building my LOC Onyx and want to hurry up and launch it, but
> have some
> stability questions.  I've heard that this isn't a very stable rocket
> (and
> obviously, being so short and fat), so I want to get its speed up fast
> before
> it clears the rail.  Knowing this, a motor like the F50 would be good
> (better
> than, say an F25)?  Still, I'm tempted, for the first flights at
> least, just to
> buy a 3-pack of D12-3's because they're so much cheaper.  The
> instructions say
> you can use a D12-3, although it is the smallest one listed.
> Any experience out there launching an Onyx on a D12?

   I've launched on a D-12 and everything was fine.  Try to use a 5 foot
rod if possible though.
 
 
 

More about that LOC Onyx.... (stability)

Post by Yves » Mon, 04 May 1998 04:00:00


Quote:
>> I'm done building my LOC Onyx and want to hurry up and launch it, but
>> have some stability questions.  I've heard that this isn't a very
>> stable rocket (and obviously, being so short and fat), so I want to get
>> its speed up fast beforeit clears the rail.  Knowing this, a motor like
>> the F50 would be good (better than, say an F25)?  Still, I'm tempted,
>> for the first flights at least, just to buy a 3-pack of D12-3's because
>> they're so much cheaper.  The instructions say you can use a D12-3,
>> although it is the smallest one listed. Any experience out there
>> launching an Onyx on a D12?

I've flown my original Onyx on a D motor once and it was scary. :-)
It's sub-200 foot flight really was underwhelming ;-)  Frankly, for a
first flight, an E30 is probably better for that fat and short stubby
beast.  But using an F in it is probably best.  I fixed the stability
problems once and for all by stretching it.  You can see TWO stretched
onyx on my homepage taking of with G40's.  The pic on the left is
mine.  I think they look pretty nifty. http://www.game-master.com/yves

--
Yves

 
 
 

More about that LOC Onyx.... (stability)

Post by Spark » Mon, 04 May 1998 04:00:00


Quote:

> I'm done building my LOC Onyx and want to hurry up and launch it, but
> have some
> stability questions.  I've heard that this isn't a very stable rocket
> (and
> obviously, being so short and fat), so I want to get its speed up fast
> before
> it clears the rail.  Knowing this, a motor like the F50 would be good
> (better
> than, say an F25)?  Still, I'm tempted, for the first flights at
> least, just to
> buy a 3-pack of D12-3's because they're so much cheaper.  The
> instructions say
> you can use a D12-3, although it is the smallest one listed.
> Any experience out there launching an Onyx on a D12?

   I have wondered if LOC is making the rocket longer than they used
to.  The kit I made is definitely longer (by about 3 or 4 inches) versus
the one in the picture accompanying the kit.  How about everyone else?
 
 
 

More about that LOC Onyx.... (stability)

Post by Quinste » Mon, 04 May 1998 04:00:00


Mine is 25.2 inches long.  The 3.1" tube is 14" and 11.2" of the nose cone adds
to this.  I don't know if this is longer than they used to be or not.

Quote:
> I have wondered if LOC is making the rocket longer than they used
>to.  The kit I made is definitely longer (by about 3 or 4 inches) versus
>the one in the picture accompanying the kit.  How about everyone else?

 
 
 

More about that LOC Onyx.... (stability)

Post by John Schult » Thu, 07 May 1998 04:00:00


My Onyx is one super duper flyer and I wouldn't pu anything less than a F40
or so in it. Will it fly on a D12? sure but it isn't nearly as much fun.
G104's make it go real good ;).
It has been all over with me to Las Vegas and LDRS ('cause it fits into a
carry on bag) and I have never seen stability problems even when folks have
put in low H motors.

John Schultz
http://www.gate.net/~o-gee


Quote:
>I'm done building my LOC Onyx and want to hurry up and launch it, but have
some
>stability questions.  I've heard that this isn't a very stable rocket (and
>obviously, being so short and fat), so I want to get its speed up fast
before
>it clears the rail.  Knowing this, a motor like the F50 would be good
(better
>than, say an F25)?  Still, I'm tempted, for the first flights at least,
just to
>buy a 3-pack of D12-3's because they're so much cheaper.  The instructions
say
>you can use a D12-3, although it is the smallest one listed.
>Any experience out there launching an Onyx on a D12?

 
 
 

More about that LOC Onyx.... (stability)

Post by Bill Nels » Sat, 09 May 1998 04:00:00


: My Onyx is one super duper flyer and I wouldn't pu anything less than a F40
: or so in it. Will it fly on a D12? sure but it isn't nearly as much fun.
: G104's make it go real good ;).
: It has been all over with me to Las Vegas and LDRS ('cause it fits into a
: carry on bag) and I have never seen stability problems even when folks have
: put in low H motors.

I have flown mine on just about every H motor in existance.  No stability
problems.

--