The Ford Barn

harvest · 03-21-2024, 10:49 PM

found this in a box of model A parts i got. for airplane engine?

Jim/GA · 03-22-2024, 08:21 AM

Yes, I believe so.

See original page number 1772b (file page n39) of the magazine "Aviation Week" in the link below. They refer to fitting a Stromberg NA-R3 carburetor (same as the data plate on your carb) to an airplane engine being developed by a company in Lansing, MI.

https://archive.org/details/Aviation...p?view=theater

Your intake manifold looks like it is the correct dimensions to fit a stock Model A engine block. Very cool.

Joe K · 03-22-2024, 09:00 AM

The manifold "hot spot" seems to agree with the Model A dimension (slightly higher than the centerline of the exhaust ports) but I'm not sure a Model A exhaust manifold would be the manifold of choice for a Pietenpol.

The intake manifold may sit "closer" and fastened "to" the hot engine block than Model A design.

Copper IS a possibility, as is the Marvel Mystery Oil shroud.

Joe K

rotorwrench · 03-22-2024, 10:10 AM

The Stromberg-Bendix NR-A series of carburetors was common in the early years of aviation. The NA-R3 would have been one of the smallest of the type produced that still had a manual mixture control. Engines like the Continental A40 and A50 might have used it. The Lycoming O-145 and Franklin 4AC 150 are other candidates. The Continental A65 engines had a 4-bolt carb flange.

Marvel-Schebler pretty much took over the small aviation carb business in the modern era.

Phil Brown · 03-22-2024, 10:27 AM

Not to sidetrack things but, I do like that valve chamber side cover in the above photo

nkaminar · 03-22-2024, 10:34 AM

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Is the tennis ball in the hub of the prop safety wired in properly?

rotorwrench · 03-22-2024, 10:55 AM

The oiling modifications by Bernard Pietenpol were extensive to get full pressure to the mains. The original oil return from the side was deleted so all it needed was a plain cover plate. That one was likely milled out of aluminum plate. The magneto installation was another big mod but I don't know if the mag he used is all that common. TCM-Bendix or Slick type mags are about all that is available now days.

03-22-2024, 08:21 AM	#2
Jim/GA Senior Member Join Date: May 2010 Location: Young Harris, GA Posts: 1,821	Re: model A airplane carburetor? Yes, I believe so. See original page number 1772b (file page n39) of the magazine "Aviation Week" in the link below. They refer to fitting a Stromberg NA-R3 carburetor (same as the data plate on your carb) to an airplane engine being developed by a company in Lansing, MI. https://archive.org/details/Aviation...p?view=theater Your intake manifold looks like it is the correct dimensions to fit a stock Model A engine block. Very cool. __________________ Jim Cannon Former MAFCA Technical Director "Have a Model A day!"

03-22-2024, 09:00 AM	#3
Joe K Senior Member Join Date: Jul 2010 Location: Cow Hampshire Posts: 4,188	Re: model A airplane carburetor? The manifold "hot spot" seems to agree with the Model A dimension (slightly higher than the centerline of the exhaust ports) but I'm not sure a Model A exhaust manifold would be the manifold of choice for a Pietenpol. The intake manifold may sit "closer" and fastened "to" the hot engine block than Model A design. Copper IS a possibility, as is the Marvel Mystery Oil shroud. Joe K __________________ Shudda kept the horse. Last edited by Joe K; 03-22-2024 at 09:06 AM.

03-22-2024, 10:10 AM	#4
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: model A airplane carburetor? The Stromberg-Bendix NR-A series of carburetors was common in the early years of aviation. The NA-R3 would have been one of the smallest of the type produced that still had a manual mixture control. Engines like the Continental A40 and A50 might have used it. The Lycoming O-145 and Franklin 4AC 150 are other candidates. The Continental A65 engines had a 4-bolt carb flange. Marvel-Schebler pretty much took over the small aviation carb business in the modern era.

03-22-2024, 10:27 AM	#5
Phil Brown Senior Member Join Date: May 2010 Location: Santee Calif. Posts: 509	Re: model A airplane carburetor? Not to sidetrack things but, I do like that valve chamber side cover in the above photo

03-22-2024, 10:34 AM	#6
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,900	Re: model A airplane carburetor? Sponsored Links (Register now to hide all advertisements) Is the tennis ball in the hub of the prop safety wired in properly? __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

03-22-2024, 10:55 AM	#7
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: model A airplane carburetor? The oiling modifications by Bernard Pietenpol were extensive to get full pressure to the mains. The original oil return from the side was deleted so all it needed was a plain cover plate. That one was likely milled out of aluminum plate. The magneto installation was another big mod but I don't know if the mag he used is all that common. TCM-Bendix or Slick type mags are about all that is available now days.