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[yamato]

does anyone know how the launches were lowered/raised ?
The Gakken 100 model book shows what looks like a fairly
complex three drum winch hanging from the overhead crane,
but the book on the carrier Taiho shows a much simpler two
pulleys with hooks  system.  Question, is the Gakken one
accurate or just a bit of modeller's license ?
 
Hope you can help
 
Thanks
 
John Irish

[TailUK]

The Conway book "Anatomy of a Ship - Yamato" shows a simple single pulley hook for the crane (6 Ton Aircraft and Boat Handling crane) Pages 96 -99.  There is a frame (the Luff frame) that sticks out the opposite side to the jib which has 5 pulleys and 2 pulleys on the base which I assume feed the luff cable and the lifting cable up from the winches below deck.  "Anatomy" show no visable winches on the crane base itself.

[TailUK]

I also found these, hope they help!
 
 
 

[yamato]

Hi,  Thanks for your reply.  I don't mean that crane - it's the one under the edge of the after deck, used to bring out/ stow the
launches that where kept in the stowage that formed the prominent
bulge on both sides aft.
 
Cheers,
 
John Irish 
 
 

[TailUK]

I can't find any reference to the actual hoist (the bit that moves along the beam) on the beam cranes.  I assume that you want to depict the crane in use as the hoist would be out of sight inside the boat deck when not in use.  From what I can see in "Anatomy" the hoist runs in a slot on the botton of the beam so there would be a motor to drive the hoist and a lift motor for the lift hook add a cable drum and that would give it the 3 drum appearence, this is supposition on my part but would make sense.
Beam is marked 21 in drawing
 

[yamato]

Hi.  Thanks for the drawing.  I'm starting to favour the less
complicated method, as on Taiho.  On that the launches were
stowed under the aft end of the flight deck, placed fore and aft,
four or so of them side by side, and the crane was simply two
slotted beams port to starboard, on the underside of the deck,
one over the fore end of the launches, the other over the aft end,
with two pulleys with hooks in each beam.  I have a load of Yamato
books, plus I can view the Yamato Museum pics (over 500), and
none of them, or the museum model, shows any details of how the
job was done.
 
Thanks for your help
 
Cheers,
 
John Irish