Cross-section drawing of the Y-1561 implosion sphere showing component placement. For simplicity, only
one set of the 32 lenses, inner charges, and detonators is depicted. Numbers in ( ) indicate quantity of
identical components. Drawing is shown to scale. (Author)
A)
B)
C)
D)
E)
F)
G)
H)
I)
J)
K)
L)
M)
N)
O)
1773 EBW detonator inserted into brass chimney sleeve (32)
Comp B component of outer polygonal lens (32)
Cone-shaped Baratol component of outer polygonal lens (32)
Comp B inner polygonal charge (32)
Removable aluminum pusher trap-door plug screwed into upper pusher hemisphere
18.5” diameter Aluminum pusher hemispheres (2)
4.375” diameter Tuballoy two-piece tamper plug
3.62” diameter Pu-239 hemispheres with 2.75” diameter jet ring
0.5” thick Cork lining
7-piece Y-1561 Duralumin sphere
Aluminum cup holding pusher hemispheres together (4)
0.8” diameter Polonium-Beryllium Urchin initiator
8.75” diameter Tuballoy tamper sphere
9.0” diameter Boron plastic shell
Felt padding layer under lenses and inner charges
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