fits model: B-17.

( Brand: Bendix Aviation Corporation ), ( Manufacturer Part Number: PD12-H2 ), ( Part Type: Engine Carburetor ), ( Compatible Make: Stromberg ), ( Compatible Model: Pd12 Series ), ( Country/region Of Manufacture: United States )
The Bendix PD12-H2 radial aircraft engine Stromberg injection carburetor is a critical component in powering the iconic Boeing B-17 Flying Fortress bomber airplane. This carburetor is a masterpiece of aviation engineering, designed to deliver precise fuel mixtures to the engine under various operating conditions.
The PD12-H2 is a 12-cylinder, single-venturi, constant-depression carburetor, featuring a unique Stromberg injection system. This system uses fuel injection instead of the traditional suction method, providing several advantages. It offers improved performance at high altitudes, where the air is thin and less dense. Additionally, it ensures a more even fuel distribution among the cylinders, leading to better engine efficiency and overall reliability.
The carburetor housing is robustly constructed, made from high-strength materials designed to withstand the rigors of aviation use. The venturi throat is precision-machined to ensure minimum fuel flow restrictions, ensuring optimal engine performance. The carburetor also features an adjustable idle mixture control, allowing for fine-tuning of the engine idle speed and mixture.
The PD12-H2's fuel metering system includes a fuel pump, fuel pressure regulator, and fuel level sender. The fuel pump delivers fuel from the aircraft's fuel tanks to the carburetor. The fuel pressure regulator maintains a consistent fuel pressure to the carburetor, while the fuel level sender provides information on the fuel level in the tanks.
The carburetor's air intake system includes an air filter and an air scoop. The air filter ensures that clean air enters the engine, while the air scoop pulls air into the carburetor. This intake system is designed to provide the engine with a consistent supply of clean air, essential for proper engine operation.
The Bendix PD12-H2 radial aircraft engine Stromberg injection carburetor is a complex and intricately designed piece of machinery. It is a testament to the ingenuity and engineering expertise of the aviation industry during the golden age of flight. Installing and maintaining this carburetor requires specialized knowledge and skills, making it an essential component for any Boeing B-17 restoration or maintenance project.
The Bendix PD12-H2 radial engine is a popular choice for restoring or maintaining Boeing B-17 aircraft due to its historical significance and power capabilities. This engine comes with a Stromberg injection carburetor as an alternative to the traditional Solex or Rochester carburetors. In this analysis, we will discuss the pros and cons of purchasing this engine configuration for a Boeing B-17.
Pros:1. Improved Performance: The Stromberg injection carburetor offers improved fuel atomization, which results in a more complete combustion process. This leads to increased power output, better fuel efficiency, and smoother engine operation.
2. Reduced Emissions: The Stromberg injection system injects fuel directly into the intake port, minimizing the potential for fuel vaporization and subsequent exhaust emissions. This can be advantageous for those who fly in areas with strict emission regulations or those who are environmentally conscious.
3. Reduced Carburetor Icing: The Stromberg injection system is less prone to carburetor icing due to the direct fuel injection, making it an attractive option for those operating in cold climates or high-altitude environments.
4. Fuel Flexibility: The Stromberg injection carburetor can handle a wider range of fuel types, including avgas and mogas, offering greater fuel flexibility for operators.
Cons:1. Cost: The Bendix PD12-H2 radial engine with Stromberg injection carburetor is more expensive than its counterparts with traditional carburetors. This can be a significant investment for those on a budget.
2. Complexity: The Stromberg injection system is more complex than traditional carburetors, requiring additional maintenance and troubleshooting. This can be a challenge for those without extensive engine knowledge or experience.
3. Availability of Spare Parts: Due to its relative rarity, spare parts for the Stromberg injection system may be more difficult to find and acquire, potentially leading to longer downtime for repairs.
4. Compatibility: Ensuring compatibility with existing engine components and wiring harnesses can be a challenge when installing a Stromberg injection carburetor in a Boeing B-17.
Conclusion:The Bendix PD12-H2 radial engine with Stromberg injection carburetor offers several benefits, including improved performance, reduced emissions, and reduced carburetor icing. However, these advantages come at a cost, both in terms of financial investment and increased complexity. Operators must weigh the benefits against the challenges and consider their budget, expertise, and operational requirements when deciding whether to purchase this engine configuration for their Boeing B-17.
Recommendation:For those with the financial resources and the desire for the additional performance and efficiency benefits, the Bendix PD12-H2 radial engine with Stromberg injection carburetor is an excellent choice for their Boeing B-17. For those with more modest budgets or limited experience, it may be wiser to consider traditional carburetor options or focus on other aspects of the aircraft restoration project. Ultimately, the decision should be based on the individual's specific needs, expertise, and priorities.
Condition of the internals isn't known. Its pretty dirty. Note the grunge on it near altitude compensatory. It was part of their spares inventory as they used the air frame type in aerial application work and overhauled radial aircraft engines.
I suspect if you really want to pretty it up one could take apart and off the carbon dirt deposits. 395563-3 MADE IN USA BENDIX AVIATION CORP. Reading the dash numbers on data plate provides correct power plant application. They read: 68973N-12G 110444N-3B, Unit was clearly removed from a used engine.
58527 model PD 12 H2 AN INSPECTION PROOF STAMP PARTS LIST NO. Missing the large stainless steel line that dumps into blower case. Most of the ends had been capped to keep out dirt and bugs moisture. Ships cheapest via USPS Ground Advantage or FedEx unless you request otherwise.
We'll box this to safely survived FedEx transport. There are two other metal data tags on the top of carburetor. This one wan't abused with drop damage or mishandling as far I can see. Largely complete.
Lots of carbon on it and a fair amount grunge. All of the attached linkage works and throttle plates open close as they should. This one is dirty. Data plate reads: STROMBERG INJECTION CARBURETOR SERIAL NO.
Assume the rubber internals are compromised with age. Stromberg Injection Carburetor PD12 H2 - Boeing B-17 Flying Fortress, One used, ARC As-Removed Condition Bendix carburetor type as last used on with Wright-Cyclone 1820-97 engines.