I agree that my Onyx would be a danger to spectators but no more than
a 6'+ HPR. Not that that justifies it. I built it before I took into
account such safety issues. My design goal was simply to make the
stoutest rocket I could using the Onyx as base. It was flown, as are
all my rockets, privately, before being taken to a club launch with
spectators. Since it has always flown straight as a string and
completely successfully, except for the lawndart incident, pilot
error, I'm confident about flying it around folks, at least at the
concentrations and distances at our club launches.
I've seen quite a few hi velocity "cruise missles" tear across the
desert at club launches and I'd be humilitated if one of my rockets
did that. That's why I test privately.
I've flown the rocket on a G80 successfully and after I certify I plan
on testing it with a H Class motor, privately of course. Try that with
a stock Onyx!
I can't argue with safety, I would never fly a "iffy heavy" rocket
around other people, but I'm sure as hell going to build and fly them
Using a little common sense, and making sure the damn thing balances
goes a looong way.
On Sat, 20 May 2000 10:45:29 -0700, The Silent Observer
>Not to revive a thread that died a few weeks ago, but doesn't it seem to
>you that a rocket that can survive a lawn dart undamaged is, perhaps, a
>little too durable to fly safely in the presence of spectators? That
>sort of strength is unnecessary in a rocket as light as an Onyx; it just
>makes the rocket more lethal if something goes wrong.
>I've got a Spike that's original stock cardboard tube, 1/8" ply fins,
>and plastic nose, and it's plenty strong for flight -- but if it lawn
>darted, I'd most likely lose the nose cone entirely (crumpled beyond
>repair) and have to cut the bode at the forward centering ring -- and
>that's still a little too strong, IMO; the same rocket could have been
>built with Estes type BT-80 and a thinner nose, with bass or hard balsa
>fins, and not only weigh enough less to fly without notification (not to
>mention not needing nose weight), but still survive a G80 -- which is
>far more than enough motor for a rocket under a pound...
>> I built mine with 1/16th G-10 TTW and added about 40g of lead to the
>> NC to balance it out. Sure I lost some altitude performance but WOW is
>> is it a strong rocket. It took a lawn dart from about 500' and was
>> undamaged. Yep, didn't hurt it a bit and it hit so hard the motor
>> casing was drivin into the MMA and the MMA was driven into the
>> airframe. The desert is rock hard out here. It was an E-28 something I
>> had clogged the ejection port with O ring grease.
>> I also use 2 parachutes with the stock chute bringing down the NC and
>> about a 30" bringing down the airframe.
>> BTW I also soaked the BT with CA.
>> Good luck.
>> Jim Rutkowski
>> NAR Pending
>> On Sat, 20 May 2000 01:11:53 GMT, "Robert Huggins"
>> >Just picked up an LOC Onyx kit. First LOC kit I've seen without TTW fins.
>> >Any advice / tips from those who've built these before?