Original Posted By: arkiesacres(at)juno.com
Subject: Pietenpol-List: one last thing.....> My commets on the Ford powered Piets were generalized observations.>Most of them produce 35 to 40 horsepower, But YES, there are some>hummers out there souped up to produce much more than that, and those>Ford Piets can get out and go. (but they are in the minority)>>Mike C.>________________________________________________________________________________
Pietenpol-List: one last thing.....
Pietenpol-List: one last thing.....
Original Posted By: Ken Beanlands
My commets on the Ford powered Piets were generalized observations.Most of them produce 35 to 40 horsepower, But YES, there are somehummers out there souped up to produce much more than that, and those Ford Piets can get out and go. (but they are in the minority)Mike C. ________________________________________________________________________________
My commets on the Ford powered Piets were generalized observations.Most of them produce 35 to 40 horsepower, But YES, there are somehummers out there souped up to produce much more than that, and those Ford Piets can get out and go. (but they are in the minority)Mike C. ________________________________________________________________________________
Pietenpol-List: Re: one last thing.....
Original Posted By: Michael D Cuy
Airworthy Standards Chapt. 549 (Canadian) has the formulas or charts tocalculate P2, The minimum rated engine power in Brake horsepower for fixedwing aircraft with a take off mass of 0 to 2000 lbs. I ran the numbers for aPiet at 1080lbs. gross. It worked out to 33 hp.Sooo. ....anyone who would think of taking an engine that is at least 69years old and expect it to put out 82.5% of it's original power out put without doing a very thorough and complete overhaul is dreaming, if he expectshis aircraft to fly well. I have ridden in both an older A powered Piet andan A-65 powered GN-1. They seemed very similar to me but the old Ford wastired and I'm sure it wasn't putting out all that it could. The point isthat the Ford with proper overhaul and attention to detail can be made toput out a lot more than the bare minimum and for less money than it takes tooverhaul a timed out Continental. The biggest gains in power will berealized in the breathing and that means cam timing. Not just that thegears are lined up but that the lift and duration are with in specs. . Itwould not be wise to assume that because the engine idles and runs well thatit is breathing properly. Have somebody dial indicate and degree check yourcam or buy a new regrind to spec. Anyone using the Ford will also be welladvised to pay close attention to cooling oil and ignition systems. Fords can be safe reliable engines. Model A engine specs: 200.5 cu.in., 40 brake hp @ 2200 rpm , Bore 3.875",Stroke 4.250", Compression Ratio 4.22:1, Cylinder offset 0.125"Mains 1.625" Timing end and center brgs 2" long rear mmain 3". Rod journals1.500" dia 1.625" wide. Bearing clearance 0.001"Cam Lift 0.302" Clearance 0.015" Base circle 0.954", Intake opens 7 1/2BTDC, Closes 48 1/2 ABDC Exhaust opens 51 1/2 BBDC, closes 4 1/2 ATDC.John McPS The Fords sound better, and better yet if they have a collector typeexhuast header made up, more power too!-----Original Message-----
Airworthy Standards Chapt. 549 (Canadian) has the formulas or charts tocalculate P2, The minimum rated engine power in Brake horsepower for fixedwing aircraft with a take off mass of 0 to 2000 lbs. I ran the numbers for aPiet at 1080lbs. gross. It worked out to 33 hp.Sooo. ....anyone who would think of taking an engine that is at least 69years old and expect it to put out 82.5% of it's original power out put without doing a very thorough and complete overhaul is dreaming, if he expectshis aircraft to fly well. I have ridden in both an older A powered Piet andan A-65 powered GN-1. They seemed very similar to me but the old Ford wastired and I'm sure it wasn't putting out all that it could. The point isthat the Ford with proper overhaul and attention to detail can be made toput out a lot more than the bare minimum and for less money than it takes tooverhaul a timed out Continental. The biggest gains in power will berealized in the breathing and that means cam timing. Not just that thegears are lined up but that the lift and duration are with in specs. . Itwould not be wise to assume that because the engine idles and runs well thatit is breathing properly. Have somebody dial indicate and degree check yourcam or buy a new regrind to spec. Anyone using the Ford will also be welladvised to pay close attention to cooling oil and ignition systems. Fords can be safe reliable engines. Model A engine specs: 200.5 cu.in., 40 brake hp @ 2200 rpm , Bore 3.875",Stroke 4.250", Compression Ratio 4.22:1, Cylinder offset 0.125"Mains 1.625" Timing end and center brgs 2" long rear mmain 3". Rod journals1.500" dia 1.625" wide. Bearing clearance 0.001"Cam Lift 0.302" Clearance 0.015" Base circle 0.954", Intake opens 7 1/2BTDC, Closes 48 1/2 ABDC Exhaust opens 51 1/2 BBDC, closes 4 1/2 ATDC.John McPS The Fords sound better, and better yet if they have a collector typeexhuast header made up, more power too!-----Original Message-----