Originally posted by Blue_Ninja_150
... My rule: Over 5 feet, midpower or more, it gets railbuttons AND launchlugs ...
The lugs are 3/8 and there's no problem with them. I don't know why anyone would put both lugs and buttons on the same rocket. Furthermore, you won't by flying this rocket at the park, only at organized launches with proper equipment and waivers. There will always be the proper rail OR rod. You don't need both.
... I think doing tip to tip glassing on this rocket, nothing else except maybe internal glassing. reading the QT stressing thread and the John Coker website
You were talking earlier in this thread about flying this rocket on G motors. If you keep adding stuff you won't be able to even fly it on H motors. I really think you are over thinking this build and headed toward trying to launch an anvil.
It has been said many times before but I'll say it again; there is no point in glassing QT and G-10 rockets. The resin
does not penetrate the G-10 and QT material like it does cardboard or wood and you're really just encasing the QT and G-10 and adding lots of weight with little structural benefit. I also shudder to think of how a fiberglassed QT and G-10 rocket would wind-up after taking it out in the Kansas winter. The whole thing is liable to delaminate away completely from the substrates. If you properly sand all mating surfaces and use quality epoxy, that will be plenty strong enough. Internal glassing on this size rocket is too hard. Expanding foam will take 1/10th the time, 1/10th the mess, equivalent weight, and more strength than internal glassing.
The past posts on motor adapters and motor retention have gone way off track. I can show you the ultimate way to retain motors with the PML Kwik-Switch system. You need 3 t-nuts and matching screws, 3 clips, and either or both 29mm and 38mm slimline or similar retainer.
...would leave less room for other stuff that I might want to stuff in there ... I've been thinking about this since last night for other reasons (54/1706).
I believe I read that this is your first HPR build. If this is right, why not A) think about building the thing close to stock so you can see how really good the kit is and how great it flies, and B) relax a little. There's no reason to rush it. In 1 week you'll be at Argonia and be able to see probably a dozen Tethys' and how they're built, stock and otherwise. You can't learn about building rockets from exchanging e-mails and digital photos. You have to hold them, point at them, and ask questions that demand an explanation and a story. I think you'll be amazed at what you'll learn.
Sorry to lecture, but it's time for a reality check.
--Lance.
