New Products Flash Sale
Thread Tools
Old Nov 05, 2014, 05:21 PM
61Thompson is offline
Find More Posts by 61Thompson
Registered User
United States, MI, Beverly Hills
Joined Jul 2011
74 Posts
Question
Universal joints

Have a question regarding universal joints.

Assuming that the alignment between the prop shaft and motor shaft is as straight as possible which type of universal joint is better. Single or double? Does the double type tend to whip if there is a slight fore/aft movement in the prop shaft? This is for a Sterling Corvette with MACK geared motors.

Appreciate your response,

61 Thompson
61Thompson is offline Find More Posts by 61Thompson
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 05, 2014, 05:33 PM
Tim B. is offline
Find More Posts by Tim B.
Registered User
Tim B.'s Avatar
Joined Aug 2009
9,881 Posts
It's possible the fewer joint connections the better ........
Tim B. is offline Find More Posts by Tim B.
Reply With Quote
Old Nov 05, 2014, 05:46 PM
tghsmith is online now
Find More Posts by tghsmith
Registered User
tghsmith's Avatar
Raleigh NC
Joined Jul 2008
1,978 Posts
slight for and aft shaft movement should be reduced as much as possible, collars and washers work great, getting shafts lined up to need only a one joint universal can be done but the doubles work just fine..
tghsmith is online now Find More Posts by tghsmith
Reply With Quote
Old Nov 05, 2014, 05:47 PM
patmat2350 is offline
Find More Posts by patmat2350
Vita ex Machinis
patmat2350's Avatar
Motor City
Joined Dec 2004
13,030 Posts
Two u-joints is always better. A single requires PERFECT alignment of the shafts, meaning they can be at an angle, but the centerlines must intersect at the exact center of the joint. You'll never achieve this, which is why Aquacraft gives you a SLOPPY single... it's noisy.
Two joints allows for realistic misalignments.
The Dumas dogbone replicates the 2-joint geometry in a simpler format.
patmat2350 is offline Find More Posts by patmat2350
Reply With Quote
Old Nov 05, 2014, 05:49 PM
patmat2350 is offline
Find More Posts by patmat2350
Vita ex Machinis
patmat2350's Avatar
Motor City
Joined Dec 2004
13,030 Posts
And you won't get whipping if the shaft is supported close to the joints.
patmat2350 is offline Find More Posts by patmat2350
Reply With Quote
Old Nov 05, 2014, 09:58 PM
bubbletop409 is offline
Find More Posts by bubbletop409
Registered User
United States, CA, Castro Valley
Joined Apr 2013
103 Posts
Quote:
Originally Posted by patmat2350 View Post
And you won't get whipping if the shaft is supported close to the joints.
Over last winter I changed my u-joints to the double style along with supporting the very end of the shaft tubes in my 1/16th Higgins, made for smoother and quieter running at all speeds.
bubbletop409 is offline Find More Posts by bubbletop409
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion change from flexi to u-joint? flamer Dock Talk 5 Nov 05, 2014 01:11 PM
Discussion Univ. No. Carolina - fake classes for athletes War is Peace Life, The Universe, and Politics 17 Oct 26, 2014 02:27 AM
Sold OS 32 Univ. Solid Joint Muffler NIB iiinsaiii Aircraft - Fuel - Engines and Accessories (FS/W) 0 Feb 27, 2014 08:07 AM
Sold OS 32 Univ. Solid Joint Muffler NIB iiinsaiii Aircraft - Fuel - Helis (FS/W) 0 Feb 27, 2014 08:05 AM
Alert N.E. Illinois Univ. of Chicago: Monument to Abe Lincoln, Democrat craab Life, The Universe, and Politics 3 Nov 12, 2013 10:55 AM