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Old Dec 06, 2009, 01:32 AM
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HeavyCruser9's Avatar
Adelaide,Australia
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My 1/72 scale USS Longbeach CGN-9

putting the "Heavy" back into Heavy Cruiser !!My ongoing build of USS Long Beach in 1/72 scale
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Last edited by HeavyCruser9; Apr 16, 2013 at 08:43 AM. Reason: altered title...
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Old Dec 06, 2009, 01:59 AM
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Also can anyone tell me what LB's navigation light set up would be? and the location of her port & stbd lights I have heaps of pics but can't spot em..

Some pics of the real ship and friends!
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Old Dec 06, 2009, 02:00 AM
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Central Missouri,USA Along the banks of the Missouri River
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Looks like alot of fun, what scale 1/96th?
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Old Dec 06, 2009, 02:30 AM
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1/72 scale bud shes just over 3m long ! (3.05) gonna need a bigger car!
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Old Dec 06, 2009, 02:37 AM
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Central Missouri,USA Along the banks of the Missouri River
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No wonder your building it in sections. I remember seeing someone build a 1/96th scale Missouri where it split down the middle. He couldnt fit it in his small car. Good luck and have fun, the Long Beach is an interesting looking warship.
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Old Dec 06, 2009, 04:24 AM
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Adelaide,Australia
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Was thinking of using either a pair of graupner 700bb motors(the ones that can go to 19volts) or the big Graupner 900's which rev lower but have bag loads of torque.
Any one use these or can suggest a motor?, they'll be spinning 2 x 55mm 5bladed props. I have enuff space set aside for up to 8 12v 7Ah gel cells depending on how much ballast she needs !!!!! If I go with the 900's they will be run on 24 volts !!
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Old Dec 06, 2009, 07:12 AM
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Motor City
Joined Dec 2004
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Here's another famous shot:

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Old Dec 06, 2009, 07:22 AM
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Motor City
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Motors: Remember, the motor and prop don't care (or know) what they're bolted to... so don't size the motor to the ship, but instead, to the prop!
A given prop, if spun a given speed, will make a given amount of thrust. If that thrust is good for your hull and desired operating speed, fine. If not, spinning the prop faster than recommended risks cavitation and wasted power, or worse, blade-flinging. Need more thrust? Get a bigger prop and drive it appropriately.

If you check Raboesch's catalog, they'll tell you the max recommended speed for a 55mm prop is about 6400rpm. Such a prop at this speed can easily be driven by a 500 size motor with 3:1 reduction... required battery voltage entirely depends on your motor's windings... it's easy to find 500's (like a Speed 500 or any r/c car motor) that will spin 18-20krpm (to be reduced by the 3:1 box) on 7.2 or 8.4v.

If you want to use 12v gel cells (easy to live with and good ballast with lots of amp-hour capacity), you'll want to look for a motor that's happy on 12v.

If you want bigger motors for direct drive, just make sure they spin the props at about the right speed on your selected voltage.
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Old Dec 06, 2009, 08:26 AM
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Western N.Y. winemaking country
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If you need info on this particular ship, why not talk to Loren Perry at Gold Medal Models? He built a 1/96 Long Beach some 25+ years ago---.
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Old Dec 06, 2009, 08:34 AM
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Vlaardingen, The Netherlands
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When cavitation is unavoideable you can use super-cavitating props.
They are trying to cavitate, but in such a way that the implosions which cause the problems are far behind the ship.
Then the hull remains in a safe distance from the danger.
I hope they are availeable in scale versions.

Greetings Josse
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Old Dec 06, 2009, 09:09 AM
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Thx patmat I know from the specs on the 900's they rev to approx 6500 (from memory) they also have about 60 Ncm of torque! so they should be spot on for direct drive, I might go for 60mm props we shall see when shes ready for that stage
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Old Dec 06, 2009, 09:14 AM
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I have stacks of good pics plus 3 issues of Model Boat mag from 2001 with photo walk round of her. now if I could work out where her port an stbd lights go i'd be stoked.

also can anyone tell me what the mast nav light set up would be for a warship of her size?
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Old Dec 06, 2009, 10:18 AM
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Leesburg, VA, USA
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I'm building a 1/96 scale Long Beach in the 1980's configuration. http://www.wmunderway.8m.com/cgi/yab...num=1208703814 Are you doing the 1960's (TALOS, phased arrays) or 1980's version (Tomahawk, CIWS, HArpoon). I can't spot the nav lights in my pictures either. Here is my LB being escorted:
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Old Dec 06, 2009, 06:07 PM
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United States, MA, Lowell
Joined Dec 2008
522 Posts
The nav lights are just forward of the lower bridge wings.
Right above the Whale boat
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Last edited by Homeport; Dec 06, 2009 at 06:12 PM. Reason: Add on
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