Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rating: Thread Rating: 10 votes, 5.00 average. Display Modes
Old 03-06-2013, 17:54   #61
Guy
Registered User

Join Date: Feb 2013
Location: So. Oregon, USA
Boat: Seafarer36c
Posts: 4,308
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by Ofer View Post
this gets my vote!!

how about using the scuba tank to blow air onto the sails on windless days.
Don't laugh to loud about the pull rope idea, it's been done in some situations. You need to fashion a wood hook that will come off the prop blade without getting hooked up when it starts.
Can you blow on sails from you own boat?
__________________

__________________
Guy is offline   Reply With Quote
Old 03-06-2013, 18:18   #62
Registered User

Join Date: Nov 2012
Location: Jupiter, FL, USA
Boat: Seidelmann 37
Posts: 31
Re: SCUBA tank to drive a batt charger motor

All - as the original poster, I thank all for your serious and silly comments. Offline I've found other sources of info re scuba tanks and air tools, with many wildly-varying opinions.

I'm gonna buy an air tool in the future and see if I can do anything useful with it hooked to a scuba tank.

Will be some weeks (perhaps months) from now, but I plan to post any positive/negative results then (probably a new thread due to time-elapsed). Thanks.
__________________

__________________
ephyraboater is offline   Reply With Quote
Old 03-06-2013, 18:36   #63
Registered User
 
Dennis.G's Avatar

Join Date: May 2011
Location: Sea of Cortez and the U.P. of Michigan
Boat: Celestial 48
Posts: 750
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by Ofer View Post
how about using the scuba tank to blow air onto the sails on windless days.
I know you're just kidding, but that would not work. If you pointed tank at sail and opened valve you would get a pressure pushing back at the tank that would counteract the force acting on the sail.

Better to just point tank outlet off the stern of the boat and blast away. Might move you a few feet
__________________
Dennis.G is offline   Reply With Quote
Old 03-06-2013, 20:08   #64
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,883
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by ephyraboater View Post
All - as the original poster, I thank all for your serious and silly comments. Offline I've found other sources of info re scuba tanks and air tools, with many wildly-varying opinions.

I'm gonna buy an air tool in the future and see if I can do anything useful with it hooked to a scuba tank.

Will be some weeks (perhaps months) from now, but I plan to post any positive/negative results then (probably a new thread due to time-elapsed). Thanks.

We have been dismissed.
__________________
Blue Crab is offline   Reply With Quote
Old 03-06-2013, 20:21   #65
Guy
Registered User

Join Date: Feb 2013
Location: So. Oregon, USA
Boat: Seafarer36c
Posts: 4,308
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by Blue Crab View Post
We have been dismissed.
Thats to bad.
__________________
Guy is offline   Reply With Quote
Old 03-06-2013, 20:47   #66
Registered User

Join Date: Nov 2012
Location: Jupiter, FL, USA
Boat: Seidelmann 37
Posts: 31
Re: SCUBA tank to drive a batt charger motor

Hey - no dismissal-dissing from me - didn't mean any negative implications. Just figured it would be best for me to say that I'll try things for myself, based on what I learned from the posts, and given all the uncertainties involved with my question. Truly, thanks all. (And I'm always open to more ideas - martini-stirring-motor or otherwise)
__________________
ephyraboater is offline   Reply With Quote
Old 04-06-2013, 08:56   #67
Registered User

Join Date: Dec 2009
Location: Los Angeles
Boat: sportscraft,30-power
Posts: 107
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by ephyraboater View Post
I'm gonna buy an air tool in the future and see if I can do anything useful with it hooked to a scuba tank.

Will be some weeks (perhaps months) from now, but I plan to post any positive/negative results then (probably a new thread due to time-elapsed). Thanks.
there is no doubt you can do that. i do it all the time. first stage downs the pressure to 170 psi so you got to make sure your tool can handle that or put another regulator. depends on the tool the air will not last too long. so she says
__________________
Ofer is offline   Reply With Quote
Old 09-06-2013, 11:44   #68
Registered User
 
nimblemotors's Avatar

Join Date: Apr 2011
Location: Sacramento, California
Boat: Solar 40ft Cat :)
Posts: 1,557
Re: SCUBA tank to drive a batt charger motor

I pulled out one of my computer fans (I have a box of 100) and it does not generate.
But it is pretty easy to modify them to be generators. Here is a video on making one into a generator. I note this guy took the fan all apart, but you can just drill some holes in the back and get access to the coil connections.
Then capacitors to replace the start battery.







__________________
JackB
MiniMPPT Solar Controller
nimblemotors is offline   Reply With Quote
Old 09-06-2013, 20:37   #69
Registered User

Join Date: Jun 2010
Location: Central California
Boat: Samson C Mist 32
Posts: 484
Re: SCUBA tank to drive a batt charger motor

Has anybody else heard of starting a sailboat engine by wrapping a line or strap around the flywheel and pulling on it somehow? The line would be led up through a block suspended from the boom. How to pull it? Maybe arrange it so somebody can jump down on it. If something went wrong I could see some broken bones...
__________________
Steve Bean is offline   Reply With Quote
Old 11-06-2013, 10:22   #70
Zil
Registered User

Join Date: Mar 2013
Location: South Jersey
Posts: 239
Re: SCUBA tank to drive a batt charger motor

This thread should be dead by now.

I have tried using an air tank from a fire department rescue air tank. The pressure falls too quickly to be of much use.
__________________
Zil is offline   Reply With Quote
Old 11-06-2013, 10:27   #71
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by Steve Bean View Post
Has anybody else heard of starting a sailboat engine by wrapping a line or strap around the flywheel and pulling on it somehow? The line would be led up through a block suspended from the boom. How to pull it? Maybe arrange it so somebody can jump down on it. If something went wrong I could see some broken bones...
This idea sprung from the Vendee ocean race where it was used by Desoyueaux to start his genny( he crash gybed the boat and started it)

(a) most modern engines dont have an exposed flywheel

(b) The exposed crankshaft pully is too small a diameter to exhert enough force on ( or get enough wraps of line on )

(c) if you have Desoyueaux abilities why are you asking us!

(d) Yes broken bones, the rig coming down, the boom breaking, I suspect after you try it , starting the engine will be way down your list of priorities.
__________________
Check out my new blog on smart boat technology, networking and gadgets for the connected sailor! - http://smartboats.tumblr.com
goboatingnow is offline   Reply With Quote
Old 11-06-2013, 10:29   #72
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by Steve Bean View Post
Has anybody else heard of starting a sailboat engine by wrapping a line or strap around the flywheel and pulling on it somehow? The line would be led up through a block suspended from the boom. How to pull it? Maybe arrange it so somebody can jump down on it. If something went wrong I could see some broken bones...
This ideas sprung from teh Vendee ocean race an was used by Desoyueaux to start his benny( he crash gybed the boat and started it)

(a) most modern engines dont have an exposed flywheel

(b) The exposed crankshaft pully is too small a diameter to exhert enough force on

(c) if you have Desoyueaux abilities why are you asking us! ( the man is a sailing GOD basically )

(d) Yes broken bones, the rig coming down, the boom breaking, I suspect after you try , it starting the engine will be way down your list of priorities.
__________________
Check out my new blog on smart boat technology, networking and gadgets for the connected sailor! - http://smartboats.tumblr.com
goboatingnow is offline   Reply With Quote
Old 11-06-2013, 11:47   #73
Registered User

Join Date: Jun 2010
Location: Central California
Boat: Samson C Mist 32
Posts: 484
Re: SCUBA tank to drive a batt charger motor

All very good points, goboatingnow; this certainly wouldn't work for everybody. just trying to stir the pot. I don't think this thread is dead; in every 50 wacky ideas there may be a couple of good ones, or one that sparks something in the obscure seldom-traveled tracks of somebody's brain. Let's hear them!
__________________
Steve Bean is offline   Reply With Quote
Old 11-06-2013, 21:06   #74
Registered User

Join Date: Feb 2007
Location: Great Neck, N.Y.
Boat: Lancer 30, Little Jumps
Posts: 542
Re: SCUBA tank to drive a batt charger motor

Quote:
Originally Posted by ephyraboater View Post
I have a (3000 psi) SCUBA tank, primarily for pleasure and/or bottom-work. I wonder if I could use this as an energy source to drive an alternator/charger, for the (hopefully never-occurring) event when I have dead batteries that will not start my diesel engine. I assume (?) that a full/near-full tank could run a small motor (alternator/charger) quite awhile, long enough to adequately charge a engine-starting battery.

There are many pneumatic tools on the market, but I would like to find/build a pneumatic (SCUBA-driven, ~150 psi available) generator/alternator (not sure proper name). Aside from my diving regulator, I have an old "1st stage" regulator that has an output hose that can deliver the 150psi to whatever.

Any of the experts out there have insights into this? I've done a fair amount of googling, but can't come up with anything useful.... Especially if it has not been done by others, this may be cost-prohibitive, but it would be great if there's something simple/useful out there. Thanks.

I have not read all posts in this thread, apologies if this has been covered...

Number of years ago (maybe 1988ish) was invited on a
large (90 fter.) old boat that had sailed up from Belize
after a refit, still needed loads of work. Owner took the time to show me around and said boat was built in
Norway before WW2 but not powered unit after the war.
Eventually was powered with an U boat diesel which he started using compressed air from his scuba tanks.

See purpose built units, look up... air start systems
__________________
hugosalt
s/v Little Jumps
Lancer 30
hugosalt is offline   Reply With Quote
Old 13-06-2013, 10:45   #75
Zil
Registered User

Join Date: Mar 2013
Location: South Jersey
Posts: 239
Re: SCUBA tank to drive a batt charger motor

Air starter could work, one shot deal from a tank.
Air charger?
__________________

__________________
Zil is offline   Reply With Quote
Reply

Tags
charger, motor, scuba

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 23:51.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.