Bluefin Tuba 3"

Pyropetepete said:

I can't see them. Gone over all 6 pages

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Not this thread; the thread he posted a link to in post #114.

Now that this thread is active again, I'll take the opportunity to say that this is possibly the best-named rocket of all time.

neil_w said:

Now that this thread is active again, I'll take the opportunity to say that this is possibly the best-named rocket of all time.

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Links are really hidden using the iOS app. Thanks.

Hmmm.... this project has had me mulling over lots of ideas..... most of them have a sound like " KRAKEN IT "
Since you have prooved that 6 supported tube fins (supported by each other) can survive Mach transition, what do people think of the idea of 6 fiberglass Kraken style fins? Do you think that they would survive as well as the BFT??

Salvage-1 said:

Hmmm.... this project has had me mulling over lots of ideas..... most of them have a sound like " KRAKEN IT "
Since you have prooved that 6 supported tube fins (supported by each other) can survive Mach transition, what do people think of the idea of 6 fiberglass Kraken style fins? Do you think that they would survive as well as the BFT??

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Here's a rough cut mailing tube I'm using to play w/this exact idea.

38/42mm tube, mostly just for deciding how to jig.

dhbarr said:

Here's a rough cut mailing tube I'm using to play w/this exact idea.

38/42mm tube, mostly just for deciding how to jig.

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Wow what are the cut angles on the tubes?

It's your basic 30/60/90 clipped delta... in 3D!

Anybody know :
- the angles on a Kraken
- of any other swept tube kits
- of any swept tubefin studies
?

edit:

o1d_dude said:

Actually, I have a printout that I refer to in cases when I'm considering different tube fins build. I'd like to credit the person who developed it but I don't remember from what site I downloaded it.

Anyway, it's attached to this post....er, scratch that. I found the link.

Mycroft's Tube Fin Rocket Resources

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dhbarr said:

It's your basic 30/60/90 clipped delta... in 3D!

Anybody know :
- the angles on a Kraken
- of any other swept tube kits
- of any swept tubefin studies
?

edit:

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You've kinda lost me there.

So the cut angle of the tube on the top is 30* and the bottom is 60*

Pyropetepete said:

You've kinda lost me there.

So the cut angle of the tube on the top is 30* and the bottom is 60*

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Leading edge is 60, trailing edge is 30. Fin tip would be 90, except the two angled cuts don't intersect.

dhbarr said:

Here's a rough cut mailing tube I'm using to play w/this exact idea.

38/42mm tube, mostly just for deciding how to jig.

View attachment 292132

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So, did the Composite version ever get built & flown ?

Dave F.

Ez2cDave said:

So, did the Composite version ever get built & flown ?

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I got bogged down figuring out 7:1 based on Larry Brand's research -- I need to order some Mach1 Glass to play with. As soon as my shop gets finished I hope to take everything out of the saved-from-the-barn-collapse totes and work up a jig to keep the angles both accurate and precise.

I thought you were looking at a 7.5" main airframe. Using dimensions from the Wildman site and using calculations for 7 fins, the *coupler* for 6" airframe will work. You would need to sand a flat (about .025" deep) where the tubes touch each other *not* where they touch the main airframe. I didn't see anything over 98 mm on the Mach 1 site.

Coming from this from the A-F side, may give a 24mm downsize a go. Would be amusing to go from A-M with just two rockets.