Original Posted By: mikek(at)intex.net (Michael King)
I posted this question in r.a.h in response to a fuss about usingModel A engines in airplanes, but this is probably a better forum. Theonly thing about these engines that has really bothered me is thebabbit/antimony/whatever bearings (which I obviously don't reallyunderstand). I have read that these engines can be machined to acceptmodern plain bearings. Is this common in the Piet community? If so,why? If not, why not?TIA, Glenn________________________________________________________________________________
Pietenpol-List: Model A bearings
Pietenpol-List: Re: Model A bearings
Original Posted By:>> scherer2(at)airmail.net (Glenn Scherer)
Subject: Pietenpol-List: Re: Model A bearings>McNarry, John wrote:>>
Subject: Pietenpol-List: Re: Model A bearings>McNarry, John wrote:>>
Pietenpol-List: Re: Model A bearings
Original Posted By: scherer2(at)airmail.net (Glenn Scherer)
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Pietenpol-List: Re: Model A bearings
Original Posted By: "Lee L. Schiek"
>McNarry, John wrote:>>>> The Ford engines are a good choice. They have a very long rear main>> bearing that works very well to carry the gyroscopic loads imposed on>> the engine by a propeller. The babbit is not a problem if it is in>> good shape, the crank jornals round and the oling system modified to>> provide oil flow to the bearings at all times. The Model B engine can>> be modified to full pressure oiling and insert bearings.Showing my ignorance here, no doubt, but I don't understand thereference to "full pressure oiling". How are the babbits lubricatedwithout this mod?Glenn________________________________________________________________________________
>McNarry, John wrote:>>>> The Ford engines are a good choice. They have a very long rear main>> bearing that works very well to carry the gyroscopic loads imposed on>> the engine by a propeller. The babbit is not a problem if it is in>> good shape, the crank jornals round and the oling system modified to>> provide oil flow to the bearings at all times. The Model B engine can>> be modified to full pressure oiling and insert bearings.Showing my ignorance here, no doubt, but I don't understand thereference to "full pressure oiling". How are the babbits lubricatedwithout this mod?Glenn________________________________________________________________________________
Pietenpol-List: Re: Model A bearings
Original Posted By:> scherer2(at)airmail.net (Glenn Scherer)
McNarry, John wrote:>
McNarry, John wrote:>
Pietenpol-List: Re: Model A bearings
Original Posted By: "Lee L. Schiek"
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Pietenpol-List: Re: Model A bearings
Original Posted By: "McNarry, John"
Glenn Scherer wrote:> > > >McNarry, John wrote:> >>> >> The Ford engines are a good choice. They have a very long rear main> >> bearing that works very well to carry the gyroscopic loads imposed on> >> the engine by a propeller. The babbit is not a problem if it is in> >> good shape, the crank jornals round and the oling system modified to> >> provide oil flow to the bearings at all times. The Model B engine can> >> be modified to full pressure oiling and insert bearings.> > Showing my ignorance here, no doubt, but I don't understand the> reference to "full pressure oiling". How are the babbits lubricated> without this mod?> > GlennGravity, drip & splash, which works well for level & horizontalautomobile applications - improvements needed for a/c engine use.(I THINK........)________________________________________________________________________________
Glenn Scherer wrote:> > > >McNarry, John wrote:> >>> >> The Ford engines are a good choice. They have a very long rear main> >> bearing that works very well to carry the gyroscopic loads imposed on> >> the engine by a propeller. The babbit is not a problem if it is in> >> good shape, the crank jornals round and the oling system modified to> >> provide oil flow to the bearings at all times. The Model B engine can> >> be modified to full pressure oiling and insert bearings.> > Showing my ignorance here, no doubt, but I don't understand the> reference to "full pressure oiling". How are the babbits lubricated> without this mod?> > GlennGravity, drip & splash, which works well for level & horizontalautomobile applications - improvements needed for a/c engine use.(I THINK........)________________________________________________________________________________
Pietenpol-List: Re: Model A bearings
Original Posted By: Lee L. Schiek
There are plenty of good rebuild shops that can do qualitywork on the babbit bearings. Most also offer updating toinserts and modern oil seals.Take a look at the rebuild options offered by some of the catalogplaces like Snyders, etc. Also there are several good shopsadvertising in Hemmings. These days, anyone restoring a model Ais going to pay $1500 for a good rebuild of their engine, and at thatprice they are expecting quality work.As far as finding a "B" engine core to rebuild, I have not heard ofone being available for a long time. They were used up by the hot rodders,etc. I guess you could get lucky though...There is a news letter called "The secrets of Speed" that catersto the performance of A and VB ford engines, you might look at that, andSnyders sells a lot of hop up parts for the A engine too.good luck.bob.-----Original Message-----
There are plenty of good rebuild shops that can do qualitywork on the babbit bearings. Most also offer updating toinserts and modern oil seals.Take a look at the rebuild options offered by some of the catalogplaces like Snyders, etc. Also there are several good shopsadvertising in Hemmings. These days, anyone restoring a model Ais going to pay $1500 for a good rebuild of their engine, and at thatprice they are expecting quality work.As far as finding a "B" engine core to rebuild, I have not heard ofone being available for a long time. They were used up by the hot rodders,etc. I guess you could get lucky though...There is a news letter called "The secrets of Speed" that catersto the performance of A and VB ford engines, you might look at that, andSnyders sells a lot of hop up parts for the A engine too.good luck.bob.-----Original Message-----