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Old Feb 06, 2014, 05:07 AM
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LOS ANGELES build logs

HELLO ALL ,

Be ADVICE : Is gonna be a very long thread so PLEASE have patience !

I know it's been don but that's way I gut courage and start these project , knowing I can get some help/tips/trick in order do not repeat same mistakes .What do You think ?.

Earlier this week I took courage and I start working on these project .
That is a LOS ANGELES submarine bought it from someone on the forum .
- I started with rudders depth as required for the large volume of Sisyphus work ....

- after many, many hours of sanding an file I managed to do what you can see in the pictures...
HOW TO FIX :
1) file until get same length?
2) fill until get same length ?
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- then continued with bow rudders ....NO problems here ,
- with tower is another story and I have some questions about the place to put axis for Bow Rudders ....( see pictures )
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- I do not know what those two parts are and which should be put it ( see pictures )
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- what are those holes and witch should be drilled ( I think some of them should be don do the captive air !)
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what is the corect distance for depth rudders and stern rudders ?
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Hull and components:
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And now I have some questions about the electronics used :
- what MOTOR.(NO BRUSH LESS!) and what speed controller....BOTH POWERED by 12V/7AH SEALED LEAD ACID BATTERY ; NO LIPO .....where to buy them ?
- What electronic devices to use for safety ?.....where to buy them ?.

OK for now,

THANK YOU

MARIUS
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Old Feb 06, 2014, 01:55 PM
Man from Atlantis
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First question, you can do either, file it down or fill the plane to make good the gap. Your choice.

Second question 1/3rd in from the leading edge looks right to me.

Third question, no idea.

You want at least one good sized hole in the top of the sail to vent air. More holes does no harm.

Fifth question- don't know.

Voids in the hull down to unsupported gelcoat- rushed/poor layup. Just fill in with a polyester or epoxy putty.

Best motor is subjective according to propeller used an desired speed, but a good start would be either a geared 500 size motor or if going direct drive possibly a 720.
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Old Feb 08, 2014, 11:48 AM
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HI @Sub culture ,

Could be these motor:
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has a small bowl bearing inside for the ax , has 4 piece of permanent magnets inside ,
I don't know what motor is?!....how do You figure at out 500/750 etc ???

MARIUS

P.S Way all my picture are changed counterclockwise with out my wheal???
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Old Feb 08, 2014, 07:06 PM
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regarding mast in top of sail.



You should be able to scale locations from this drawing.
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Last edited by Cliff Hanger; Feb 08, 2014 at 07:26 PM.
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Old Feb 08, 2014, 08:15 PM
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What scale is your boat?

Los Angeles class boat.
Measuring from stern of boat not including propeller..
The following numbers are approximate scales from drawing above.

from stern to front of planes .. = 23.85' = 7270mm
from stern to rear of planes.. = 12.80' = 3900mm
does not include movable part of planes
------
from stern to front of rudders .. = 18.75' = 5715mm
from stern to rear of rudders .. = 6.60' = 2010mm
--------
I have a spread sheet that converts feet and inches in to any scale needed.
Actually I have several spread sheets.
But I use these two.
You scale off the drawing and then enter numbers to get inches - feet - millimeters.
I made these available to anyone who would like to use them.
They can be found here. Model Conversion Spread Sheets
You can edit them to indicate what ever you want.

I also have an old image program (1994) that I use to take any drawing and scale it to known dimensions.
Then using those dimensions I can use a tool to measure to any point on the drawing.
That number is then placed in the Spread Sheet to get full size numbers and any scale I want to look at.
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Last edited by Cliff Hanger; Feb 10, 2014 at 10:52 AM.
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Old Feb 09, 2014, 05:16 AM
Man from Atlantis
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You can generally tell the type of motor you have by can size e.g. diameter.

A 500 size motor is 36mm diameter, which it looks to me is what you have there comparing against your two servos.

However they do come in many different winds, and that is more difficult to judge by sight alone. To measure torque and RPM really depends on empirical testing.

Most , if not all 500 size motors should be sufficient to power that LA at scale speed or beyond, but you will almost certainly need gear reduction.
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Old Feb 10, 2014, 04:37 AM
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HI @Sub culture

These are Dimension of MOTOR :

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@Cliff Hanger

Hull DIMENSION : 1300mm with out aft con and 1360mm with it .
Difference showing in pictuire is becouse of camera angle.
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How much to AX ?
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MARIUS
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Old Feb 10, 2014, 07:03 AM
Man from Atlantis
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Sounds like a 700 size motor then. No idea on RPM or correct voltage however. So it might be suitable.

As for the the correct hull dimensions, come on, you should be able to work that out from the drawing supplied here.
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Old Feb 10, 2014, 10:58 AM
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I edited my post #5 and included the measurements in millimeters.

I also included a link to the Spread Sheets, I use to scale at what ever scale I choose. The more real numbers I have the more accurate I can get with scaling. Of course if the drawing is inaccurate, so is the scaling.

Usually I have at least the Overall length and Overall beam. Some times I have draft but that is not reliable. Some times I know the propeller diameter. Everything you know of the real numbers helps.

The spread Sheet I use is not Locked Down. So be careful changing numbers.
Red numbers and blue numbers are the variables.

The formulas can be changed to fit what you want to do. Again, be careful, all the numbers are connected in some way or another.
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Old Feb 12, 2014, 04:25 AM
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THANK YOU Both

I'm not worry about the size or scale . Is already don as it is so IS PERFECT
All I want is to figure at out about where should I do the holes for both Rudders !.

I need some practice with that spread sheet .
In the mean time , I have to file , cut , drill on the hull to fit both halves.

MARIUS
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Old Feb 12, 2014, 04:37 AM
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Quote:
Originally Posted by Cliff Hanger View Post
What scale is your boat?

Los Angeles class boat.
Measuring from stern of boat not including propeller..
The following numbers are approximate scales from drawing above.

from stern to front of planes .. = 23.85' = 7270mm
from stern to rear of planes.. = 12.80' = 3900mm
does not include movable part of planes
------
from stern to front of rudders .. = 18.75' = 5715mm
from stern to rear of rudders .. = 6.60' = 2010mm
--------
I have a spread sheet that converts feet and inches in to any scale needed.
Actually I have several spread sheets.
But I use these two.
You scale off the drawing and then enter numbers to get inches - feet - millimeters.
I made these available to anyone who would like to use them.
They can be found here. Model Conversion Spread Sheets
You can edit them to indicate what ever you want.

I also have an old image program (1994) that I use to take any drawing and scale it to known dimensions.
Then using those dimensions I can use a tool to measure to any point on the drawing.
That number is then placed in the Spread Sheet to get full size numbers and any scale I want to look at
.
If You have my Hull dimensions can You use those program to see where to put the ax for Rudders ?
I ask these because my SUB is 1300mm ALL LENGTH and Your dimensions are 4 - 7 times BIGGER !.Could be some error some where , or I miss understand something ?!.
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Old Feb 12, 2014, 12:00 PM
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Let's see if I can help with an explanation.
First..I corrected errors in the spread sheet. I up loaded the corrected sheet.
--------------------
The following numbers are approximate measuring the drawing image.

from stern to front of planes .. = 23.85' = 7270mm
from stern to rear of planes.. = 12.80' = 3900mm
does not include movable part of planes
------
from stern to front of rudders .. = 18.75' = 5715mm
from stern to rear of rudders .. = 6.60' = 2010mm
------
The numbers above where scales to represent real numbers in feet converted to millimeters. The numbers below the RED scale numbers are the model measurements.

By entering full size boat numbers in millimeters you will see the converted number to scale. If you know the scale numbers, enter full size numbers until the scale number is displayed in the appropriate cell.
-------------------------
I can build a LA class sheet if you like.
What I need from you are:
Overall length (not including propeller)
Width of hull
Sail top to bottom
Sail front to back at bottom
planes .. hull to outside tip
rudders .. hull to tips


These numbers will help me establish the scale.

Your 1300mm overall gives me a scale of 1/84.8
I want to make sure we get this correct.

If you have the propeller, the diameter will help.

Ralph SSBN --- 598 (Cliff Hanger)
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Last edited by Cliff Hanger; Feb 12, 2014 at 03:06 PM.
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Old Feb 13, 2014, 04:40 AM
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HI @Cliff Hanger,

THANK YOU.

.[Quote]........I can build a LA class sheet if you like.
What I need from you are:
Overall length (not including propeller)
Width of hull
Sail top to bottom
Sail front to back at bottom
planes .. hull to outside tip
rudders .. hull to tips


These numbers will help me establish the scale.

Your 1300mm overall gives me a scale of 1/84.8
I want to make sure we get this correct.

If you have the propeller, the diameter will help.

Ralph SSBN --- 598 (Cliff Hanger)
[Quote]


Now those are DIMENSIONS :
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PLEASE ,when You get time make a class sheet

MARIUS
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Old Feb 13, 2014, 02:04 PM
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Spread Sheet for Los Angeles class submarine

Link to Drawing for reference.
Click on image then View Image.
You can right click on this image and Save Image As from there.
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Old Feb 14, 2014, 08:54 AM
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THANK YOU so Much for Your Truble

MARIUS
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