Banner Ad 1

RCAB and RCAB-R

R/C Submarine modelers

RCAB and RCAB-R

Postby Marvin Harten » Mon Jul 12, 2010 3:18 am

Does anyone have diagrams and/or layouts for an RCAB and an RCAB-R?
Thanks.

Marvin Harten
Marvin Harten
SubCommittee Member
 
Posts: 13
Joined: Wed Feb 26, 2003 3:51 am
Location: Los Angeles

Re: RCAB and RCAB-R

Postby petn7 » Mon Jul 12, 2010 7:17 am

This might help (from BigDave's website):

http://www.frontiernet.net/~bwelch/ballast.htm
User avatar
petn7
SubCommittee Member
 
Posts: 592
Joined: Sat Jun 14, 2003 3:50 pm
Location: PA

Re: RCAB and RCAB-R

Postby Art Broder » Mon Jul 12, 2010 7:34 am

http://artbrodersmodels.multiply.com/ta ... t%20system) There is an RCABS diagram in the slideshow, but I can't isolate it.
Art Broder
SubCommittee#0060
RCABS- It's easy to control your own bladder!
User avatar
Art Broder
SubCommittee Member
 
Posts: 487
Joined: Sat Feb 22, 2003 4:35 am
Location: MA

Re: RCAB and RCAB-R

Postby Rogue Sub » Mon Jul 12, 2010 1:19 pm

Kevin
A Global Force For Good

http://WWW.ROGUESUBWORKS.COM
User avatar
Rogue Sub
Registered User
 
Posts: 1761
Joined: Mon Jul 24, 2006 4:01 pm
Location: NY

Re: RCAB and RCAB-R

Postby Crazy Ivan » Tue Jul 13, 2010 11:36 pm

Also:

Image

Image
George "Crazy Ivan" Protchenko
Image

“There are the assassins, the dealers in death; I am the Avenger!”-Nemo
"I'm disinclined to acquiesce to your request; means No!"-Capt.Barbossa
User avatar
Crazy Ivan
SubCommittee Member
 
Posts: 625
Joined: Sun Feb 23, 2003 2:42 am
Location: Rochester, NY, USA

Re: RCAB and RCAB-R

Postby Tom M » Wed Jul 14, 2010 7:08 am

Ok help me with this.
It seems to me by this diagram that the compressed air simply moves from the air chamber to the bladder and back.
Does the air ever leave the chamber during the dive state? I guess I am thrown seeing the compressed air at a constant amount always in the pressure hull. How does just transferring air from one item to the next make this thing work?
I must be missing something very obvious.
Tom Mihelich
USS GRAYLING SSN-646
User avatar
Tom M
Registered User
 
Posts: 34
Joined: Sat Jun 12, 2010 7:49 pm
Location: Michigan

Re: RCAB and RCAB-R

Postby Boss subfixer » Wed Jul 14, 2010 12:30 pm

Tom,
The bladder is either outside of the WTC or encased in a ballast tank section of the WTC depending what you have for room between the hull and the WTC for the bladder to expand. If you have the room and it's outside then the bladder displaces the water that's between the hull and the WTC when you pump the air into it and up you come. If you don't have enough room between the hull and the WTC then you make a ballast tank section in your WTC with holes drilled in it, again displacing the water when you pump air into the bladder. Pretty simple actually. With both examples, when you release the air back into the WTC for RCABS or the air tank for RCABS-R the bladder deflates and lets the water back in and your on your way down. Of course the boat diving and surfacing when you want it to depends on your boat being trimmed out correctly.
Hope this helps.
Don
Don Evans
SCM# 2733



Put your heart into it, well done is better than well said... Ben Franklin
User avatar
Boss subfixer
Registered User
 
Posts: 673
Joined: Sat Aug 07, 2004 11:29 am
Location: Rhode Island, USA

Re: RCAB and RCAB-R

Postby bluefish » Sat Feb 09, 2013 3:12 pm

Are you rcabs-r guys using a pressure/vacuum switch to turn the air pump off when the bladder is empty?
User avatar
bluefish
SubCommittee Member
 
Posts: 11
Joined: Wed Mar 28, 2007 8:30 pm
Location: Halifax, NS, Canada

Re: RCAB and RCAB-R

Postby Crazy Ivan » Mon Feb 11, 2013 4:41 pm

A cutoff switch is not really necessary. When the bladder has fully collapsed, the pump will just attempt to pull a vacuum, something which these little compressors are typically not very good at, and the load current draw will usually drop slightly. You can measure how long it will take to empty the bladder on the bench, and you can mentally tick off how many seconds you ran the pump when diving the boat. If you over run it a bit, there is no harm. The only risk is if there is an air leak in the plumbing. Then the pump may ingest some water. This is generally not a good thing, so you should always inspect the system for leaks prior to starting your patrol.
George "Crazy Ivan" Protchenko
Image

“There are the assassins, the dealers in death; I am the Avenger!”-Nemo
"I'm disinclined to acquiesce to your request; means No!"-Capt.Barbossa
User avatar
Crazy Ivan
SubCommittee Member
 
Posts: 625
Joined: Sun Feb 23, 2003 2:42 am
Location: Rochester, NY, USA

Re: RCAB and RCAB-R

Postby bluefish » Mon Feb 11, 2013 8:24 pm

Thanks for reply Ivan, I'm not at the stage yet, just getting back into building after life's curves have got in the way!!!
Feels good to get back to my project.
User avatar
bluefish
SubCommittee Member
 
Posts: 11
Joined: Wed Mar 28, 2007 8:30 pm
Location: Halifax, NS, Canada


Return to R/C Modeler

Who is online

Users browsing this forum: No registered users

cron