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Thread: Top bearing question
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03-05-2012, 07:54 PM #1
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Top bearing question
True or false.....On a runing engine that is trimed in or out to far does the flywheel try to bend the top of the crank to run level?
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03-05-2012, 08:06 PM #2
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False
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03-06-2012, 07:56 AM #3
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False
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03-06-2012, 08:40 AM #4
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I agree.
As the boat moves off level, gyroscopic precession tries to bend the crank. As long as the boat/engine remains stable in any plane, there is not a precessional load.
When we do a lot of hard aerobatics the gyros in the Avionics really take a beating from the precessional forces....
"Confidence" is that wonderful feeling you had right before you fully understood your true situation.- Unknown
I don’t know what effect these men will have upon the enemy, but, by God, they terrify me.- Duke of Wellington“I am not afraid of an Army of lions lead by a sheep; I am afraid of sheep lead by a lion.” – Alexander the Great
Whoever said the pen is mightier than the sword obviously never encountered automatic weapons.-Douglas MacArthur
Allison GSE 300XS
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03-06-2012, 05:18 PM #5
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how could it
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03-06-2012, 08:24 PM #6
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Man ..I know I left that stash from 1987 somewhere around the garage !!
Ii'm sure the forces are there but are overcome by the strength and mass of the crank and the slight change in angle ." The Fleet of Old Boats "
'73 -14' Orlando Clipper Skiff -Yamaha 25
93- 18 ' Renegade Nomad Flats boat -Merc 150
'94 - 21 ' Allison XB - 2003 -Merc 260
'97 - 19 ' STV Euro - Merc - 260
'99 Benninton 2375 TOONER - V-6- 2 liter 150 Mariner
2001 Grady White 263 - Twin Yamaha 250 OX 66
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03-07-2012, 08:02 AM #7
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May tha force be wit ya!!!!......
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03-07-2012, 11:57 AM #8
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I have no idea of how great the force is compared to how "stout" the bearing assembly was designed, since I am still trying to get my IQ up into a positive number.... I just wanted to point out the precessional force occured any time the gyroscopic action of the flywheel changed planes, not when it was at a constant tilt.
"Confidence" is that wonderful feeling you had right before you fully understood your true situation.- Unknown
I don’t know what effect these men will have upon the enemy, but, by God, they terrify me.- Duke of Wellington“I am not afraid of an Army of lions lead by a sheep; I am afraid of sheep lead by a lion.” – Alexander the Great
Whoever said the pen is mightier than the sword obviously never encountered automatic weapons.-Douglas MacArthur
Allison GSE 300XS
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03-07-2012, 12:02 PM #9
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We do know the heavier the flywheel the more stress is placed on the crank and bearings due to the gyro effect of the spinning mass.(One of the benefits of a lighter flywheel) If you hold a gyro while it is spinning, and change the position you can feel the force of the spinning mass change.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
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03-07-2012, 12:10 PM #10
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Howard johnson is right !
JOHN MASON
'83/VECTOR/MERC 200-- SOLD
'98 Quartershot T-3/ MERC 200
"If your not living on the edge, your taking up to much space"
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03-07-2012, 12:43 PM #11
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I am no astro fisisist, but I did stay at a holiday inn a few years ago.....
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
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http://www.screamandfly.com/showthre...cs.&highlight=
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03-07-2012, 06:01 PM #12
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I enjoy the humor tree-mendously
Originally Posted by XstreamVking
.....thanks
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03-07-2012, 06:56 PM #13
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A flex flywheel will flex backwards under acceleration and forward under de acceleration.
JayJay @ JSRE
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03-10-2012, 06:32 PM #14
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dat y day caul it uh flexplate dude
[SIGPIC][/SIGPIC]
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03-10-2012, 07:54 PM #15
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Listen to Johnny Now ! Originally Posted by johnnyracer
He knows FlyWheels , and he also knows , The Crank Won !!!
Johnny , You still got those pics from the day that happened ?
I'm just glad it didn't hurt you . Those things spinning up there scare the hell out of me !!!
Rich Martin 018HAVE BATTERIES , WILL TRAVEL !!!
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