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Old Sep 10, 2002, 01:21 PM
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Catalina From Zoltar CAD Plans.

This Thread will be covering the Construction of
the PBY Catalina.
First off Let me thank Chris Reinders for providing CAD Plans of one of the Most overlooked Warbirds of the WW2 era.
Please visite his Wed site @ http://www.zoltar.demon.nl/rcmodels/preview.htm
It's worth the Visit. And if you wish he will forward a set of CAD plans too you.
Hmmm seems he's just got 158 request for drawings!
Seems some of ya been watching other threads Kool!
So Join in and luts build Cats the old fashion way!
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Old Sep 10, 2002, 01:26 PM
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Here I forward a Post from Chris Reinders, And I hope he joins in the thread. -------------------------------------------------
Thanks for the link,
I will have a look at it.

Yes I think also that Solidworks is a winner.
I do a lot of designs for customers with it. Mostly
constructions/assemblies.

For ordinary 2D into 3D translation, I use Quick Cad, The cheap spinnoff of
Autocad.
For getting a 3-view into 3D its the best step in between.

Anyway good luck building the Catalina.

At the moment I do a project in between working on the Macchi M33.
You can find some pictures of it in www.rcmodels.net/cnc under more results
(maybe you have seen it already)
This is a good research plane to my opignion and beautiful too.
After this I will continue on a bigger Catalina.
_____________________________________

I send you these protoype drawings/ parts of the catalina for your own
personal use.
You can and may not sell or distribute these drawings-parts in this or any
other modified (scaled) version.
Of course you may modify the drawing parts for your own use any way you like
it.
Anyone who seriously wants to build a PBY 5 Catalina can get a set for free
distributed by catalina@rcmodels.net

If you think changes should be needed somewhere in the plan to improve the
quality please let me know and I will incorporate them.


I hope that you keep me informed on your building results and your
personal experiences so I can gather/ collect this information and share
it with model builders on the internet. In the future I hope my modelsite
grows
with the help of you and others into a real model-Catalina site. My
modelsite
(Cat-section) will be updated every few months. New building and lateron
flying pictures will be published here. So take a look once and a
while......You can follow the progress I make on my model wich could be some
help to you.

Drawings:

These prototype drawings are in DXF format.
Each part is a drawing, so even a slow computer from 80386 to 80XXX pentiums
can handle the files easely
Keep in mind that the DXF-files originally where dimensioned in MM. This is
important when you start importing the files in your CAD program.
Of course you can build the same small model as I am building, but the
advanced option with the PC and printer is that you can build this Catalina
in any scale you like. Just figure it out wich scale fits you best (in your
car, garage, garden) Only keep the thickness and type of the building
materials in mind doing so....

Depending on the covering method of the fuselage(hull, because its actually
a ship), stringers allong the hull will be needed to support the skin.
I used 1 mm balsa and epoxybased fibreglass to cover the hull. But it needs
to say that 1.5 mm balsa is better for sanding purpose.
If you want to use for instance Balsa/ Oracover or paper with dope and
paint, it is better to go a little thicker.
This of course is to your own idea and vision.

I wish you succes building this beautiful flyingboat.

Keep me posted!

Greetings,

Chris Reinders
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Old Sep 10, 2002, 06:53 PM
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Beautiful work! I'll be e-mailing you shortly for a set of plans.
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Old Sep 10, 2002, 10:41 PM
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Been messing with the templates and I seem to have
it scaled to 55". A Nice size to work around engine pods and a S400>Mega 16series DD,
or a S400 GD. Should fit just fine here.
I'm using Coral Draw6 so it's workable but???
I plan to use my Stika and cut the templates in Vinal and apply to the Balsa stock to be cut out. Use what you have and tell us . This is gonna take some time.
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Old Sep 11, 2002, 12:18 AM
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After some Playing around I have my first Stika templates ready to stick to Balsa Stock 3/32 should do nicely.
Still to verify if correct scale against Cad Drawings.
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Old Sep 11, 2002, 09:13 AM
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Chris Contacted me with a concern here's his reply;

Hello Dennis,

Found your Thread and some examples of the stika.

I am a little bit worried as I see that all bend lines/ curves come out as straight lines.

Be aware that in the design of the catalina most parts/contours are bended

I suspect a error/wrong settings of Corel/Stika while importing the DXF files!

Probably the amount of vertices is too low.

Better use a regular Cad program if you cant get this sorted.

There are some free CAD programs available for download so money should not be a problem here :-)


Good Luck !

Greetz

Chris
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Old Sep 11, 2002, 11:34 AM
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Hi Denis,
Here goes my first 2Cents( BTW we got back Cents in Portugal with this EURO thing )

Back in the mid 90īs I did some water flying with a Goldberg Piper Cub with floats and water rudders. I donīt remenber having too much touble during taxiing even with some wind blowing.

The need of 2 ESCs for power-rudder mix (mix off on take-off), thatīs what I use in the HU-16, in HULL type flying boats might very well be due to the following:

In a turn the plane tends to "sit" in the hull and in the outer ( of the turn) tip float. The outer tip float drag in the water (much like aileron drag in the down aileron ) tend to prevent it from turning.

With the drag in the tip of the wing it only makes matters more difficult.
Cheers, Have Fun and donīt get lost in all those curves of the Catīs hull João
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Old Sep 11, 2002, 01:10 PM
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joao,
Good points to Ponder! Anouther good reason to install the GWS Retracts for the Pods.
My Guess here is once pointed and starting takeoff
to begin retracting pods. Loosing that Stick in the mud forces and freeing up the Rudder.

Landing! Whats you're experence with pods here?
UP/Down/comming down?
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Old Sep 12, 2002, 01:03 AM
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Group.
TreeMagnet was over and we looked over the Cad vers Coral drawing of the Plans. The CAD is much better but the Coral will do. Figure it's 2 passes of light sandpaper difference.
Plans were Scaled to 60" Span.
Here's the Fuse Templates 1>8 Of 13
Cost to date ~$3 in vinal. For 2 sets.
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Old Sep 12, 2002, 07:06 PM
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Thanks for the plans!!
Looks to be a very fun build.


Bryan
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Old Sep 12, 2002, 07:30 PM
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I got my plans as well. How are you determining scale?
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Old Sep 12, 2002, 10:21 PM
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Well I'm using Coral Draw 6.
I opened the (Catalina Samenstelling file)
Changed the scale of the Document say 100" x/y and
drag expanded the file to fit. Quite easy in theory.
Today I spent Hours going over adjusting/expanding drawing.Ahh shoot! I'm Spent.
But I have all the Fuse Templates
cut out and tweeked. Now
In the end Coral Draw Suxs!!!!
As chris pointed out I've lost a lot of the correct Contours. So I'm Hopeing to get a free CAD
program. But then I'll have to spend some time playing with it
Will see Hmmm?? As I continue for now.
Here's the templates being applied to the 3/32 Balsa. Some Templates are 6.3" wide so will have to increase Balsa Stock Width some.
Simple Step here!!
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Old Sep 12, 2002, 10:34 PM
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As for the ElCheepo in me I Blew it.
Plan was to stop and scoop Balsa Period.
Saw this Gillows Just sitting there in AJ's Hobby
shop. Sold $84.95 Can$
Well I figure some day I'll build her up.
RC Hmmm Kinda wimpy! Maybe twin S280 ???
Naaa better just hang it in the Reckroom.
For now I'll just Scan the templates and store the
files. Incase
They are a wonderfull kit!!
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Old Sep 13, 2002, 12:45 AM
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OK ready to Make some Dust
That's the whole Fuse Ribs.
Now for central Longerons.
Oh missing Sta 1 in Pic.
Cost today.Can$
Zap Med/Thin $18.00
3/32 Balsa $14.oo
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Old Sep 14, 2002, 01:22 AM
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Changing Lanes

OK This is My Last Post to this Thread.
Reason I'm Changing Plans.
Today the RCM Plans for the PBY-2 Came and they are real good!!
More easy for me to work with and more detail for the scratch builder.
Also with my Coral Draw I'm getting better templates to work from. See new Template Pic.
So I'll just Continue in anouther thread See Ya.
Thanks Chris!
Tom is still planning to build his
with the CAD plans,
once his CNC foam cutter is up!
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