Triangle shaped tube

[BruuD]

I just got a huge triangle shaped tube from a friend of mine.
Can I use it to build a rocket with?
I never saw a rocket using a triangle shaped tube, only round ones.
Would it be stable?

Bruud

 

[hokkyokusei]

Sure it would work. Rockets don't need to be round! Usual stability rules apply, the CG has to be further forward then the CP. I seem to remember seeing several rockets made from Toblerone "tubes" at the IRW over the years, but can't seem to find any pictures right now.

 

[jflis]

SUre it would work just fine. Check out the "CAUTION! Rocket Launch In Progress" free downloadable rocket at: https://fliskits.com/products/rocketkits/kit_detail/caution_rocket.htm

also, see the attached picture of it from the rear

jim

 

[DynaSoar]

Originally posted by BruuD
I just got a huge triangle shaped tube from a friend of mine.
Can I use it to build a rocket with?
I never saw a rocket using a triangle shaped tube, only round ones.
Would it be stable?

Bruud

I've seen a picture of a rocket made from a US Postal Service Priority Mail package. It's trianguler, about a meter long and about 12 cm on a side.

If it had to be round the shuttle wouldn't fly.

 

[adrian]

Originally posted by hokkyokusei
Sure it would work. Rockets don't need to be round! Usual stability rules apply, the CG has to be further forward then the CP. I seem to remember seeing several rockets made from Toblerone "tubes" at the IRW over the years, but can't seem to find any pictures right now.

I can. IRW 2003, Sunday 24th August.

Observe how the fins had extensions added in order to put the CP behind the CG.

 

[hokkyokusei]

Originally posted by adrian
I can. IRW 2003, Sunday 24th August.

Observe how the fins had extensions added in order to put the CP behind the CG.

Is that one of yours then? I was thinking of George Rogozinski, I think.

 

[adrian]

No, it's not mine. I try to photograph pretty well everything at IRW, not just my own stuff.

I can't remember whose it was, or whether they found out by swing test or dodgy flight that the original triangular fins weren't quite big enough...

 

[hokkyokusei]

May well have been George's then.

 

[Mad Rocketeer]

Originally posted by jflis
SUre it would work just fine. Check out the "CAUTION! Rocket Launch In Progress" free downloadable rocket at: https://fliskits.com/products/rocketkits/kit_detail/caution_rocket.htm

also, see the attached picture of it from the rear

jim

Another Free FlisKit ! I'm there, man!

I've built, but not yet flown, a Midnight Express. I've bought, but not yet built, a Acme Sptifire, a Duece's Wild, and a Richter Recker. Downloading the Caution! Rocket Launch In Progress! now. Coolness abounds.

 

[jflis]

You'll get a real kick out of the CRLIP (CAUTION Rocket Launch In Progress)

By the way, CRLIP is pronounced "clip", the "R" is silent... LOL

it goes together real easy and flies great!

 

[Mad Rocketeer]

I have an LOC Graduator on the bench and a lot of other rockets waiting in line (plus some scratch built ideas), but the CRLIP is bound to be one of the first 2 or 3 I build next, maybe first. The Midnight Express was a lot of fun and pretty instructive to build.

I think my next Midnight Express, and maybe the CRLIP, will use epoxy and fishing weights to do the nose. When I did the Midnight Express, I couldn't get my wood glue to set in the tip of the nose for the shock cord attachment. Ditto for Ailene's Tacky Glue. I ended up digging that out and using a bit of epoxy. Bingo! Worked fine, and the extra weight was a bonus. I then added clay (which pretty much filled the nose completely) to get the balance right and used a bit more epoxy (I had some already mixed) to hold in the clay. The nose is hard at the tip and shoulder and soft in the middle where the clay is. Next time, I'm going to "paint" the inside of the nose al around with epoxy when I attach the shock cord, then put it upside down, drop in fishing weights to get the right balance, and drip some more epoxy over them to lock them in place. If I do it right, the last epoxy will be added before the first fully cures, and the nose will be rigid throughout.