Fiberglass or plastic nosecones for BT-60 tubing?

[jahall4]

Anyone out there 3D printing/selling nosecones for BT-60 tubing? Specially interested in Ogive 5:1 or Von Karman profiles.

 

[jqavins]

If you'll settle ogive for 3.36:1
A few sizes including 4.89:1 and 5.04:1
This company and others can make them for you.

That's just two quick Google searches with some sites blocked by my corporate filter.

 

[jahall4]

Sure, lots of folks that do 3D printing, have a fellow down the street, but not looking to do it custom yet. Surely someone out there stocks or prints to order a 5:1 or VK cone?

 

[jqavins]

The second link has very near 5:1 ogive in stock. The last link, if I'm not mistaken, will do design as well as printing, so a well known design like ogive or VK noses might as well be in stock.

 

[crossfire]

I feel PML make some of the best plastic nose cones.

 

[jahall4]

The second link has very near 5:1 ogive in stock. The last link, if I'm not mistaken, will do design as well as printing, so a well known design like ogive or VK noses might as well be in stock.

I'm not seeing it Joe

 

[jqavins]

I hadn't noticed before, but the second link, to a Rocketarium page, actually just has a regular Estes product.

https://www.rocketarium.com/Build/Nose-Cones/NC-60-Estes​

It's a three pack of BT-60 nose cones. One is an 8" ogive, and another is an 8.25" ogive, giving ratios of 4.89:1 and 5.04:1 respectively. (The third is a conical of similar length, so you can just throw that in the spare parts box.)

Shapeways offers help with designing and, not on that front page but elsewhere, my initial searches turned up plenty of ovive and some VK nose cones that could be adapted easily if they're not the right size. I just did a new search and found this 5:1 VK for BT-50. A 1.677:1 upscale makes it fit BT-60, and I feel sure they'd do that for you.

And my point all along was that these results came up with very quick, easy searches. My google-fu is reasonably good, but not the best, and I'm at work with time restrictions and corporate site blocking, so there must be a dozen places to get these if one takes more time to look.

 

[kuririn]

https://www.apogeerockets.com/Build...iberglass-5-1-Ogive-Nose-Cone?cPath=42_47_61&
https://www.apogeerockets.com/Build...ss-5-8-1-Von-Karmon-Nose-Cone?cPath=42_47_61&
The Von Karman is sold out, 5:1 ogive has only one left.

 

[jahall4]

https://www.apogeerockets.com/Build...iberglass-5-1-Ogive-Nose-Cone?cPath=42_47_61&
https://www.apogeerockets.com/Build...ss-5-8-1-Von-Karmon-Nose-Cone?cPath=42_47_61&
The Von Karman is sold out, 5:1 ogive has only one left.

Thanks, but those are for 38mm not BT60 which is just a little larger.

 

[jahall4]

I hadn't noticed before, but the second link, to a Rocketarium page, actually just has a regular Estes product.

https://www.rocketarium.com/Build/Nose-Cones/NC-60-Estes​

It's a three pack of BT-60 nose cones. One is an 8" ogive, and another is an 8.25" ogive, giving ratios of 4.89:1 and 5.04:1 respectively. (The third is a conical of similar length, so you can just throw that in the spare parts box.)

Shapeways offers help with designing and, not on that front page but elsewhere, my initial searches turned up plenty of ovive and some VK nose cones that could be adapted easily if they're not the right size. I just did a new search and found this 5:1 VK for BT-50. A 1.677:1 upscale makes it fit BT-60, and I feel sure they'd do that for you.

And my point all along was that these results came up with very quick, easy searches. My google-fu is reasonably good, but not the best, and I'm at work with time restrictions and corporate site blocking, so there must be a dozen places to get these if one takes more time to look.

Yes, I was aware of the Estes cones before I posted. Their construction is not adequate for HPR.

 

[kuririn]

Thanks, but those are for 38mm not BT60 which is just a little larger.

Sorry, all I saw was the 41.6mm.

 

[kuririn]

Would this file work?

https://www.thingiverse.com/thing:2382742

And is balsa out of the question?

https://www.erockets.biz/semroc-balsa-nose-cone-16-8-2-ogive/

This cone fits an ST-16 tube, same id as the BT-60 but a little thicker.

 

[jlabrasca]

Yes, I was aware of the Estes cones before I posted. Their construction is not adequate for HPR.

Why not?

 

[jahall4]

Why not?

Not at all confident a one of those Estes cones would survive a transonic flight much less Mach.

 

[jahall4]

I'm working with someone now to develop a custom cone, but still interested in anyone that has a "production" product.

 

[kuririn]

What you need is a high performance custom nose cone

https://pythonrocketry.com/

 

[jahall4]

What you need is a high performance custom nose cone

https://pythonrocketry.com/

I've seen their stuff, thought of them, but overkill (over cost) for this project and again custom plus he does not do cones less than 6" Dia. per website.

 

[dhbarr]

I think you'll find you can slide most 38mm HPR cones right into bt60 coupler.

I know, for example, that loc pnc 1.52 is how the Merlin Missile Sword works. I've also done a couple of tests with Madcow FG in the same size range.

 

[Estesbasher]

How about a carbon fiber BT-60 rocket?

 

[markkoelsch]

Not at all confident a one of those Estes cones would survive a transonic flight much less Mach.

If a plastic cone all you need to do is fill it with two part foam.