BNC-20L mini bertha nose cone

[chronister]

Anyone have a BNC-20L, Mini Bertha nose cone, that you are willing to sell or trade? (clone or already painted ok - as long as it's reasonably accurate and not messed up)

 

[powderburner]

Sandman (Gordon Agnello)

or BMS (Balsa Machining Service)

Both are very good, easy to work with, very fair prices

 

[Vanel]

Semroc has the cone here...

https://www.semroc.com/Store/Scripts/prodView.asp?idproduct=571

 

[powderburner]

Semroc has the cone here...

Those words may say elliptical, but that picture (if it is an accurate representation) just doesn't look like the right shape for a Bertha NC of any scale, at least to my old eyeballs.

I'm going to re-recommend Sandman or BMS, I think they will get closer to what you want

 

[MarkII]

Those words may say elliptical, but that picture (if it is an accurate representation) just doesn't look like the right shape for a Bertha NC of any scale, at least to my old eyeballs.

I'm going to re-recommend Sandman or BMS, I think they will get closer to what you want

You are exactly right - it doesn't resemble a downscaled PNC-60 at all. But Semroc's BNC-20L IS an accurate reproduction of the nose cone that Estes used for the 0803/TK-3 Mini Bertha mini-brute.

https://forums.rocketshoppe.com/showthread.php?t=3405

MarkII

 

[chronister]

When I tried the BMS reproduction nosecones, I found them highly inaccurate. The ones from Semroc are much closer to the original Estes -- and the diameters are more accurate.

I don't have any experience with Sandman, one way or the other.

 

[Carl]

You are exactly right - it doesn't resemble a downscaled PNC-60 at all. But Semroc's BNC-20L IS an accurate reproduction of the nose cone that Estes used for the 0803/TK-3 Mini Bertha mini-brute.

https://forums.rocketshoppe.com/showthread.php?t=3405

MarkII

Thanks, Mark.

We sell both the "correct" BNC-20L and the BNC-20LS, which is a downscale of the old BNC-60L. We do not have a downscale of the later PNC-60MS, yet.

Both copies I have of the original Estes BNC-20L have the distinctive straight walls leading to a short ogive like our BNC-20L. My Mini-Bertha does not even look like the Big Bertha.