nose weight

That might well depend on the RSO and the number of spectators present.

Well, yes, if you want a professional alignment of the principle inertial axis to the rocket centerline. But I don't know of any sport rocketeers who bother with this.

Alan

Phil Stein wrote in news: snipped-for-privacy@4ax.com:

In considerably more space.

len.

Also, some farmers don't like the use of lead. (execpt in their shot guns)

It's environmentally correct. It's also cheap & easy to find. For the amount of weight most people are adding, the volume isn't a problem.

Concrete also gets lighter, as it dries out - something to think about if your rocket's CG-CP margin isn't too big, to start with.

"Swish, Fwoosh, Fwoosh Fwoosh fwooshfwooshfwooshfwoosh...."

"Gee, the CG was o.k. when I flew it last month..."

Many people that use lead shot, embed it in epoxy. That's not very different from casting it.

I'd never let that fly at one of my launches.

Much better idea, UNLESS you add a pound too much. The latter would at least come under scrutiny at a safe launch.

DING!DING!DING!DING!DING!DING! Best suggestion of all UNLESS it's a scale-a-rino.

P.S. G75's technically need a LEUP.

Now I'm going to have to find the original weight & weigh it again. IIRC, it was 27lb to begin with.

How much of that was the concrete?

Then just use high thrust, short burn!

Nope.

Useless everywhere in rocketry.

The BATFE here in the US requires "Low Explosive User Permits" for folks using things on their "explosive" lists. The exact requirements are not clearly defined right now, and has lead to many, many threads on RMR..

FYI - LEDP is Low Explosive Dealer Permit and LEMP is Low Explosive Manufacturer Permit, as you might see these referenced too!

Yes. Those are referred to as tube fins. There are several designs of model rocket that use tube fins. One big tube fin, larger than the diameter of the rocket body tube, is called a ring fin.

steve