Start by throwing the lug away and switch to rail buttons 😉 Seriously, the issue isn't so much length as distance between the two rail guides / launch lugs. For a rocket that size, don't just use one. One rail guide / lug should be about at the genter of gravity or forward and the other as far aft as reasonable.

If you wish to use lugs, I would think 1/2" diameter rod should do. Some may think that too big but to avoid rod whip it has to be rigid. I hope this helps.

Doug

Theoretically, a 3/8 or 1/2 inch lug would be fine.

Realitically, throw the lugs away and switch to rails. They whip less, are easy to use, and the buttons add less drag and impact the appearance a lot less.

Overall, they're a much better choice.

Agree with CJL. Not only that TRA may follow CAR's (Canada Assoc Rocketry) and disallow them on all H and above birds, so you may end up having to retrofit ayway. Hobbytown has some nice "rail lugs" for a few bucks which can be glued or screwed to your rocket. Just spend some time using angle iron or a plumb line to make sure you get the two lined up exactly...
JS

Thanks to all that replied. Picked up two 5/16" rail lugs today at HobbyTown.

Ken P.

Assuming you went to the HT at 92'nd, notice if there were any K's?
J

Why would they have K's?

Did Joe finally secure a LEDP?

I did go to the HT on 92nd. Didn't notice any K's. In fact, I wouldn't know one if I saw it 😀 . Did see alot of anodized aluminum stuff though. I'm pretty new to the larger rockets. Growin up there were only A, B and C's. Just launched an E with my 11 yr old and that was pretty big. Hoping to launch a G at the MHM. I just hope it flies!

I did go to the HT in Longmont and they had some large red tubes (maybe 3" x 18"??).

kp

yeah - those are motor casings. John (I assume) was asking about reloads.

Also, good luck with mile hi mayhem, and trust me, you'll be hooked 🙂

Someday, you'll think of G's as the motor you launch when you can't afford an I (or bigger) 😀

If it's a rocket, it's good though, and with those linear lugs, just make sure they're aligned. If they are, it should all work out. I assume you got the PML lugs, and if that's the case, I have them on my AMRAAM and they work great.

oh, and xman, whatever you do with your cluster, do not, repeat, do not attempt to use the copperhead igniters for your cluster. They simply aren't reliable enough. 🙄 And of course a cluster of 3 G's would require a level 1 certification flight first.

First fire jrs should be available at HT--5 bucks for 3 seems like a lot, but in this instance, $$ well spent. If they are out, one of the vendors should have something appropriate.
John S

Thanks. I was wondering about the ignitors - I read they weren't too reliable. Didn't know about the level 1 cert though. I'll get my paperwork in order for that. Interested in being a witness?

Another (much cheaper) option than the first fires are Quickburst. Unfortunately, they are gone until the first of may, so so may have to eat the cost of the first fires for Mayhem, and then go to the others later.

Another option is to dip your own, but whatever you do, don't use copperheads.

Xman,

Love to be a witness, but make sure that there is nothing that prohibits flying a cluster for L1. I know its an issue later on, but can't recall re L1.
J

NAR can't use clusters to certify, Tripoli can.

Warren Musselman

However, not on 3 G's

It has to have one motor in the cluster at least that is in the certifying class.

So an H and 2 G's would be OK, but not 3 G's.