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09-08-2019, 10:17 AM | #1 |
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Difference between pre 1949 flywheel and 49-51 flywheel
What are the differences between the pre 1949 flathead flywheels and the 49-51 flywheels used on the 8BA engines. I have been told they are not interchangeable. Want to buy the correct one for my 8BA
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09-08-2019, 12:48 PM | #2 |
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Join Date: Jan 2011
Location: sw minnesota
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
the flywheels for an 8ba style motor have the bolt holes for the pressure plate drilled all the way thru the flywheel. on the earlier motors the holes are not drilled thru. thats how to tell them apart, but there are other differences too so they do not interchange
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09-08-2019, 01:35 PM | #3 |
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Join Date: Jun 2010
Location: San Antonio, Texas
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
The 59A series have a different starter ring and it's placed differently. 8BA family flywheels mostly have drillings for the 9.5 inch Long type clutch with exception to station wagons, police cars, and trucks but the flywheels can be redrilled for any size clutch. Mercury cars used the Borg & Beck 10-inch clutch so they are different than Ford. Also keep in mind that the 8BA family began in 1948 with the first bonus built trucks while the cars were still 59A series engines. The 8BA car type flywheels are still out there.
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09-08-2019, 01:36 PM | #4 |
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Join Date: May 2010
Location: Granger (Northern) Indiana
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
All '49-'53 Ford and Mercury flywheels are inter-changeable; it's the clutch type and size that are different. Ford cars and trucks used 2-3 sizes of Long style pressure plates, while Mercurys used Borg & Beck design.
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09-08-2019, 01:53 PM | #5 |
Senior Member
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
Thanks to my fordbarn friends for the useful info. Got all the info I need to get the right flywheel.
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09-08-2019, 02:25 PM | #6 |
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
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09-08-2019, 05:43 PM | #7 |
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
Got it! Thanks for your help.
What type aircraft, an old Beechcraft ? |
09-08-2019, 05:52 PM | #8 |
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Join Date: May 2010
Location: Chester Vt
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
There is a difference in the depth of the crankshaft flange witch places the late flywheel closer to the back of the early block (oil pump Cover) it also has a different location for the starter bear. All this makes the flywheels not interchangeable. I might have this backwards, But???
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09-08-2019, 06:26 PM | #9 |
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
Thanks, O’ Ron
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09-08-2019, 06:47 PM | #10 |
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Location: East Shore of LAKE HOUSTON
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
Nope, it's Sky King's old Cessna T-50. Below is an old Twin Beech 18 at roughly the same angle. DD |
09-08-2019, 11:00 PM | #11 |
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
I’m old enough to remember sky king. I’m not a pilot but worked in atc in the AF and FAA.
Take care and thanks for the info. DD (my working initials in the FAA) |
09-09-2019, 07:04 PM | #12 |
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Join Date: May 2010
Location: Sherman, CT
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
Hi V8COOPMAN, Is that Song Bird? Craig.
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09-10-2019, 02:43 PM | #13 |
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Join Date: May 2010
Location: East Shore of LAKE HOUSTON
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Re: Difference between pre 1949 flywheel and 49-51 flywheel
Yes Craig, it's Sky's original Songbird (one word), N67832. Note the "Flying Crown Ranch" crest on the side of the fuselage. DD
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