Brodhead Pietenpol Association

Original Posted By: Warren Shoun
Subject: Pietenpol-List: Re: 8N / 9N / Ford A>for the skinny on the tractors see>>http://www.ytmag.com/fordnclub/specs.htm>>Another problem to overcome is the motor is a>structural part of the tractor. the oil pan alone>weighs about a hundred pounds.>>Bill>>________________________________________________________________________________

Original Posted By: Doug
Subject: Pietenpol-List: Re: 8N / 9N / Ford A>Bill:> I had no intention of using an 8N engine on a piet..... or for>that matter a model A engine on a Piet.> The oil pan really isn't much of a problem as it is not difficult>to manufacture one.... for those of us who weld.> I simply brought up the similarity between the two engines because>I feel that the 8N engine is a vastly superior design>________________________________________________________________________________

Original Posted By: Duane
for the skinny on the tractors seehttp://www.ytmag.com/fordnclub/specs.htmAnother problem to overcome is the motor is astructural part of the tractor. the oil pan aloneweighs about a hundred pounds.Bill________________________________________________________________________________

Original Posted By: Howard Wilkinson
The main advantage of the A or for that matter the B engine, is the powerthey produce at low rpm. they are large bore and produce good low rpmtorque. This ability to produce torque allows them to swing a large diameterfairly coarse props. the resultant "thrust disk" is ideal for draggyairframes.The second advantage is the length of the output main bearing. (Almost thesame length as the small contintals. A-65 to 0-200) Most of the forcesgenerated by a propellor are centrifugal. The long bearing provides a goodlever to control the procession that occurs when the aircraft changesattitude or any other directional changes. Not that our type of craft doesit quickley :-)The biggest gains in A performance will be found in breathing, camcondition etc. When Bernie choose the A engine he knew what he was lookingfor.John Mc-----Original Message-----

Original Posted By: Bill Talbert
Bill: I had no intention of using an 8N engine on a piet..... or forthat matter a model A engine on a Piet. The oil pan really isn't much of a problem as it is not difficultto manufacture one.... for those of us who weld. I simply brought up the similarity between the two engines becauseI feel that the 8N engine is a vastly superior design, and thoughtthat perhaps with some appropriate modifications it might serve aswell or better on a Piet, and was wondering if anybody had looked intousing one. The cast oil pan, the heavy flywheel, and the cast frontaccessory case probably make up virtually all the weight differencebetween the two engines. I would suspect that if the displacementwere about the same it could easily be made to put out just as muchpower as the car engine. Engines are often de-rated by carburetionand camming. I wanted to mention that someone commented about the babbitbearings and shims in such a fashion as to suggest that theynecessarily go together. I've worked on various older engines whichhad inserts and still used shims.... One that comes to mind isHerculese, and another I believe was a flat head Studebaker. Thesteel backed insert bearings last far longer than babbit bearings, andare easily replaced.H.W.-----Original Message-----