design of transmissions - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 05-15-2002
Senior Member
 
Join Date: Jul 2001
Posts: 459
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
DuaneIsing is on a distinguished road
design of transmissions

I got into a discussion with some sailors the other night at the USCGAUX meeting and it was obvious that most of us don''t know how the typical sailboat auxiliary transmission works. I tried to research this on the web this morning with no success.

Can anyone out there point to a web-based resource(s) that will show/explain the mechanical design and functional details?
Reply With Quote Share with Facebook
  #2  
Old 05-16-2002
Senior Nappy Headed Ho
 
Join Date: Feb 2001
Posts: 734
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Denr is an unknown quantity at this point
design of transmissions

If you ask some specific questions, I could probably answer them. Marine transmissions are basically 2:1 reduction gearboxes with sliding clutches to engage the prop in both hands of rotation as well as no rotation aka. neutral. Most use an ATF as the primary lubricant. The way most of us use our boats, the ATF should be replaced every 100-150 hours.
Reply With Quote Share with Facebook
  #3  
Old 05-16-2002
Senior Nappy Headed Ho
 
Join Date: Feb 2001
Posts: 734
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Denr is an unknown quantity at this point
design of transmissions

If you ask some specific questions, I could probably answer them. Marine transmissions are basically 2:1 reduction gearboxes with sliding clutches to engage the prop in both hands of rotation as well as no rotation aka. neutral. Most use an ATF as the primary lubricant. The way most of us use our boats, the ATF should be replaced every 100-150 hours.
Reply With Quote Share with Facebook
  #4  
Old 05-16-2002
Senior Member
 
Join Date: Nov 2000
Posts: 407
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
tsenator is on a distinguished road
design of transmissions

DuaneIsing,

I don''t know of alot of Marine Tranny websites, but here are a few. Some you can even post questions to

This site is where there are Forums/Questions asked:
http://MarineForums.com/

This list spec/info on all sorts of Tranny''s
http://TransmissionMarine.com/

But I think the best thing is to order one of these 3 booksYou will get alot more info:

a)Troubleshooting Marine Diesels by Peter Compton for about $15 on Sale

b) Marine Diesel Engines: Maintenance, Troubleshooting, and Repair by Nigel Calder for about $17 on sale

or "THE BIBLE"...(which is great to keep on board for all systems)
c) Boatowner''s Mechanical & Electrical Manual: How to Maintain, Repair, and Improve Your Boat''s Essential Systems by Nigel Calder about $30 on sale

Reply With Quote Share with Facebook
  #5  
Old 05-16-2002
Senior Member
 
Join Date: Jul 2001
Posts: 459
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
DuaneIsing is on a distinguished road
design of transmissions

Thanks, Denr, and tsenator, for responding. I didn''t ask any specifics because I wanted to glean the answers for myself, but just couldn''t seem to find any worthwhile info after looking at over 50 web sites.

The question was prompted because none of the group I mentioned above (including myself) had ever seen the insides of a marine tranny. One of the guys was claiming that putting your tranny in gear while sailing with the engine off would NOT lock the shaft because the coupling between the engine and prop shaft was all hydraulic.

I started thinking about all the possible methods for getting power to the prop (hydraulics, planetary gears/bands, multi-disc wet cluthes, spur gears, cone clutches, etc.) and realized that I had no idea what design(s) is/are actually used.

As to buying a book, I have been so happy with the info from Calder''s Cruising Handbook, that I will just go buy the mechanical repair book, too.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
a few specific design questions jbarros Boat Review and Purchase Forum 5 10-02-2003 02:13 PM
best boat design for nasty chop dan s Boat Review and Purchase Forum 1 07-18-2002 03:13 PM
looking for keel/centerboard design troyaux Boat Review and Purchase Forum 9 04-30-2002 02:46 AM
Design Standards Cheetie Boat Review and Purchase Forum 11 04-17-2002 02:21 PM
Dodger design for a Hunter28.5 bigdreams29 Gear & Maintenance 0 03-04-2001 01:05 PM


All times are GMT -4. The time now is 06:25 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.