I purchased my first box of B14 motors from Centuri probably sometime in late 1976. By that time of course the Centuri motors were once again being made by Estes.

I was really looking forward to seeing the 'really deep' core on the motors. But, to my sad surprise when they came with my next order, they did not have any deeper of a core than my other motors in my meager stock at that time. I thought at the time that maybe there was a manufacturing defect in them, but they operated just fine in my Screaming Eagle.

In more recent times though, with various discussions about B14 motors and how they were made, I assumed they had just stopped coring them.

Several years ago I did get a number of boxes of very early 70s Centuri B14s and they DID have the deep core.

So yes, I think at some point in the 70s they just stopped drilling them, but never really announced a spec change on them.

Earl

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Earl L. Cagle, Jr.
NAR# 29523
TRA# 962
SAM# 73
Owner/Producer
Point 39 Productions

Rocket-Brained Since 1970