Compressor.

[anonymous]

Hello if you are building

Hello if you are building a sub especially a large one than this system is the best and most economic way to go.
About 13 years ago I developed the onboard air compressor ballast system for RC subs and it proved to be very reliable safe and cheap to build.
Please refer to my article in the SCR ,I don't remember which one it was but I'm sure that Tim Smiley can find the article.
In that article I made several diagrams and then you may copy it as you like and ask all the questions you may have ,and we can post them .
In the pics you will see a small compressor ,it is an EngersoldRand unit that is very common and easy to obtain about 20.00$ .Also the air banks are updated to the new stainless steel ones and come in several sizes and are rated far above the 40 to 60 psi ratting we use on subs.Also Michelin makes a really nice digital pressure sensing auto turn off unit that can be fitted to a sub .
The cool blue readout shows the pressure rising and the set point for the unit to turn off at! And its only 35.00$ buck or so at PEPBOYS.
Also there is a one way valve that is used and solenoid valves ,3 each.
With this system any size ballast tank can be used and especially in those Russian nukes the waterline is much lower than other subs ,it highly recommended that a large ballast tank is used.
Just remember that no need to buy propel or other gasses and its totally green and safe,even approved by the Coast Guard,and works in theory just like the real thing.
No special switches or sensors required,just read my article and ask all the questions you may need.

Best regards David Santivanez
subcreator1@aol.com







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See what's free at AOL.com.

[anonymous]

http://upload8.postimage.org/946658/ACT8701.jpg

http://upload8.postimage.org/946671/VV2050.jpg

http://upload8.postimage.org/946699/HCA9501.jpg

http://upload8.postimage.org/946761/airorwaterpump.jpg

[JWLaRue]

David,

Your article was in the

David,

Your article was in the December 1996 (#37) of the SubCommittee Report........

-Jeff

[anonymous]

The compressor I use from

The compressor I use from a Engersold Rand unit.
Cut the lines to suit and install on a flat sturdy serface with standoffs and screws of one inch for metal longer for plastic mounting ,no need for vibration absorbers,it runs very smothe.The motor aften has a 2 shafted motor that has a fan atached I use for the maindrive because I can install a water pump on the end for cooling.
A motor with no double shaft is replaced instead.
All lines are aircraft aluminum and common compresstion fittings of 3/8inch.
I will post the Typhoons ballast system later.

[anonymous]

The Ballast Tank

In my subs the tank is made from PVC pipe but the inside is partitioned like an aircrafts fuel tank.
Anti sloshing holes are drilled into each partition.Every partition is glued in at 3 inches intervals and the tops of each partition is cut of for better top flow.
The bottom of the tank has holes at every center of each partition that vent directly to the water outside the sub ,if not when she blows ballast the bubbles will enter the freeflood area and throw the sub off ballance,just like the real ones do.
To fine control the amount of water entering or leaving the tank a center sealed tank is usede with a gear pump ihn this way up and down fine adjustments in depth can be acheived without the need of 2 trim tanks ,a hybrid ballast system is what I call it.

Just pump up the air banks to 40 psi ,turn off the compressor or it does it auto maticly with the digital compressor,then dive the sub by opening the top of the tank with the solinoid valve andonce dived close it,then fill the trim tank so that the sail top goes under and then just control your depth with the diveplanes and trim tank pump in or out,again as the real ones do.
Simple reversing circuits are used with microswitches and standard servos to operate the gear pump as seen in the picture,cost 20.00$,used for Volvo Mercedes Porch winshield washer pump found on Ebay new.
This system can also be made to fit into smaller subs as there are micro compressors available as seen in the above post.

[mylo]

David,

Excellent stuff. I would

David,

Excellent stuff. I would like to see more.

Is this all in that SCR issue ? If so, how do I get my hands on it. This is the kind of system I want to put in my boat.

Mylo

[JWLaRue]

Hi Mylo,

Let me re-read David's

Hi Mylo,

Let me re-read David's article tonight to see how complete it is. If memory serves, it was a pretty comprehensive article.

Back issues for all of the SCRs can be purchased through our membership chair, Don Osler.

-Jeff

[mylo]

If it was a 1996

If it was a 1996 article, maybe it could use some updates and put in a future edition of SCR.

Anything on ballast systems is a pertinent and ongoing topic of discussion. I'm sure the readers would not be bored.

Mylo.

[JWLaRue]

Mylo,

Excellent idea! Perhaps we can

Mylo,

Excellent idea! Perhaps we can convince David to update his article?

-Jeff

[anonymous]

Yes I will update that article!

It did not take much for me to decide to update the article in # 27 SCR called "Pump me up Scotty" .
Now that inexpensive digital compressors ,and stainless steel air banks are available along with a number of new Items that its a good time to show how it works.
The Typhoon I am currently building will have all of these improvements along with a 5 ft alfa also in drydock .So expect alot of pictures and technical info. It should be fun!

Thanks Dave

[mylo]

Oooooooo......goody http://www.subcommittee.com/forum/icon_biggrin.gif


Mylo

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Oooooooo......goody


Mylo

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