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UNK 116733 Overhauled Aircraft Radial Engine Cylinder R1830 P/n

116733 Unk Overhauled Aircraft R1830 Radial Engine Cylinder P/n

( Brand: Unk ), ( Manufacturer Part Number: 116733 ), ( Part Type: Engine Cylinder )

Review UNK Overhauled Aircraft Radial Engine Cylinder P/n

The **UNK 116733 Overhauled Aircraft R-1830 Radial Engine Cylinder (Part Number: Insert Specific P/N )** represents a meticulously refurbished component from the legendary **Pratt & Whitney R-1830 Twin Wasp** radial engine series, a powerplant renowned for its reliability, durability, and historic significance in aviation. Originally designed in the 1930s, the R-1830 remains a cornerstone of classic aircraft, including iconic models like the **Boeing 314 Clipper, Douglas DC-3, and Lockheed Hudson**, as well as modern restorations and warbird projects. This overhauled cylinder is a precision-engineered replacement designed to restore or enhance the performance of an aging or worn-out original component, ensuring optimal combustion efficiency, structural integrity, and longevity.

Manufactured to exacting military and aviation specifications, the **R-1830 cylinder** features a robust **cast aluminum alloy head** with precision-machined combustion chambers, intake and exhaust ports, and valve guides, all engineered to withstand the extreme thermal and mechanical stresses of high-performance radial engine operation. The cylinder s **piston assembly** incorporates high-grade forged aluminum or steel components, often featuring **honeycomb or ribbed designs** for enhanced strength-to-weight ratios, while the **connecting rod** is forged from heat-treated steel to ensure resilience against the cyclic loads of propeller-driven flight. Critical surfaces, including the **cylinder bore, piston rings, and valve seats**, undergo rigorous **honing, lapping, and sealing treatments** to guarantee a near-frictionless fit and prevent oil leakage or excessive wear key factors in maintaining the engine s power output and fuel efficiency.

The overhaul process for this cylinder adheres to **FAA, military (e.g., MIL-SPEC), or manufacturer-approved standards**, often involving **dismantling, ultrasonic cleaning, dimensional inspection, and replacement of worn parts** such as valve springs, retainers, and rocker arms. The **cylinder head** may undergo **stress-relief treatments** to mitigate cracking, while the **piston crown** is often polished or re-profiled to restore its original shape, ensuring proper combustion chamber geometry. Modern overhauls may also incorporate **advanced coatings**, such as **thermal barrier or wear-resistant overlays**, to improve heat dissipation and extend service life, particularly in high-altitude or tropical operating environments where thermal cycling can accelerate degradation.

Designed for **interchangeability with original R-1830 components**, this overhauled cylinder is compatible with both **military and civilian variants** of the engine, including the **R-1830-92, -94, -A, -B, -G, and -S models**, among others. Its **standardized thread patterns, mounting flanges, and valve train interfaces** ensure seamless integration into existing engine assemblies, reducing downtime and simplifying maintenance procedures. Whether used in a **restored vintage aircraft, a warbird restoration, or a modernized classic plane**, this component delivers the **reliability and power** that the R-1830 is famous for, with the added assurance of **extended service intervals and reduced risk of catastrophic failure**.

For operators and mechanics, the **UNK 116733 overhauled cylinder** represents a **cost-effective alternative to sourcing original parts**, which can be scarce and prohibitively expensive. Its **certified overhaul documentation** typically includes a **detailed inspection report, torque specifications, and compatibility notes**, ensuring compliance with aviation regulations and providing peace of mind for aircraft owners. Whether powering a **DC-3 cargo plane, a P-47 Thunderbolt, or a custom-built radial-engine aircraft**, this component embodies the **legacy of American aviation engineering** blending historical craftsmanship with modern precision to keep the roar of the Twin Wasp alive for generations to come.

Buying an overhauled aircraft engine with the specifications you ve mentioned specifically an **UNK 116733 overhauled R-1830 radial engine with cylinder part number (P/N) details** requires careful consideration due to the unique challenges and opportunities associated with radial engines, particularly those from the R-1830 family. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Purchasing This Overhauled R-1830 Engine**

1. **Proven Reliability and Performance**

The R-1830 (a variant of the Wright Cyclone) is a well-established engine with decades of operational history in aircraft like the Beechcraft 18, Cessna 310, and others. Overhauled engines from reputable shops (e.g., Lycoming, Continental, or specialized radial engine overhaul facilities) undergo rigorous inspections, component replacements, and performance testing. If the overhaul was done by a certified facility, the engine should meet or exceed original manufacturer specifications.

2. **Availability of Parts and Support**

While parts for radial engines are less common than for modern engines, the R-1830 still has a robust aftermarket. Cylinders, pistons, magneto components, and other critical parts are available from suppliers like **UNK (Universal National Corporation)**, **Aero Parts Warehouse**, or specialized distributors. Additionally, there are still mechanics and technicians experienced in radial engine maintenance, though they may be harder to find than those for contemporary engines.

3. **Lower Fuel Consumption Compared to Modern Engines**

Radial engines like the R-1830 are known for their fuel efficiency, especially in high-altitude or high-speed operations. While they consume more oil than modern engines, their fuel economy can be advantageous for certain flight profiles, particularly in older aircraft where weight and drag are critical.

4. **Potential for Customization and Modifications**

Enthusiasts and restorers often appreciate the ability to modify radial engines for performance or aesthetic purposes. Upgrades like **supercharger modifications**, **high-performance cylinders**, or **exhaust systems** can be installed, though these require specialized knowledge.

5. **Historical and Collectible Value**

For owners of classic or warbird aircraft, an overhauled R-1830 can enhance the aircraft s authenticity and value. Restored engines are often sought after by collectors and operators of vintage aircraft.

6. **Cost-Effective for Specific Applications**

In some cases, the cost of purchasing and maintaining an overhauled R-1830 may be lower than that of a modern engine, especially if the aircraft is used for training, airshows, or limited flight hours. The initial purchase price of an overhauled radial engine is often significantly lower than that of a new or even a lightly used modern engine.

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### **Cons of Purchasing This Overhauled R-1830 Engine**

1. **High Maintenance and Operational Costs**

Radial engines require more frequent and labor-intensive maintenance compared to modern engines. Key challenges include:

- **Oil Consumption**: R-1830s typically burn oil at a rate of 1 2 quarts per hour, requiring frequent top-ups and more frequent oil changes.

- **Component Wear**: The engine s design (e.g., floating cylinders, complex valve trains) leads to higher wear rates, necessitating more frequent inspections and part replacements.

- **Labor-Intensive Overhauls**: Overhauls are costly and time-consuming, often requiring specialized tools and expertise. A full teardown and rebuild can cost tens of thousands of dollars, depending on the scope of work.

2. **Limited Availability of Qualified Technicians**

Finding mechanics with extensive experience in radial engines is difficult. Many aviation maintenance organizations (AMOs) focus on modern engines like Lycoming IO-360 or Continental IO-550, and radial engine expertise is declining. This can lead to longer wait times for repairs or overhauls.

3. **Part Obsolescence and Lead Times**

While parts are available, some components (e.g., specific cylinders, pistons, or magneto parts) may have long lead times or be discontinued. Purchasing an overhauled engine may require holding extra inventory of critical spares to avoid downtime.

4. **Inspection and Due Diligence Challenges**

Verifying the quality of an overhauled R-1830 can be difficult. Key questions to address include:

- **Who performed the overhaul?** Ensure the facility is certified and reputable (e.g., Lycoming Service Centers, Continental, or a specialized radial engine shop).

- **What was included in the overhaul?** A proper overhaul should include cylinder bores, pistons, rings, valves, bearings, and a full inspection for cracks or wear. Ask for documentation, such as a **B-1 or B-2 inspection report** (for Lycoming engines) or equivalent.

- **Engine Hours and Cycle Count**: Confirm the engine s remaining service life. Radial engines typically have a finite number of cycles (e.g., 1,500 2,000 hours between major overhauls), and exceeding this can lead to catastrophic failure.

- **Cylinder P/N Compatibility**: Ensure the cylinder P/N (e.g., UNK 116733) matches the engine model and is compatible with the rest of the components. Mismatched parts can cause performance issues or failure.

5. **Operational Limitations**

- **Vibration and Noise**: Radial engines are inherently louder and vibrate more than modern engines, which can be uncomfortable for passengers and may require aircraft modifications (e.g., soundproofing).

- **Takeoff and Climb Performance**: While fuel-efficient at cruise, radial engines may have slower takeoff and climb rates compared to modern engines, especially in high-density altitude conditions.

- **Altitude Performance**: The R-1830 s performance degrades more rapidly at higher altitudes compared to modern turbocharged engines.

6. **Insurance and Compliance Risks**

Insuring an aircraft with an overhauled radial engine can be more challenging due to perceived higher risk. Some insurers may require additional documentation or impose higher premiums. Additionally, regulatory agencies (e.g., FAA) may scrutinize the overhaul process more closely if the engine is not from an approved facility.

7. **Resale Value and Marketability**

While the R-1830 is beloved by enthusiasts, its resale value is limited compared to modern engines. If you plan to sell the aircraft or engine in the future, the market may not support the same value as a contemporary powerplant.

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### **Conclusion**

Purchasing an overhauled R-1830 radial engine with the specifications you ve mentioned can be a rewarding but high-maintenance decision. The engine s reliability, historical significance, and fuel efficiency make it attractive for specific applications particularly in classic or warbird aircraft, airshows, or limited-use operations. However, the challenges of high maintenance costs, limited technician availability, and part obsolescence must be carefully weighed against the benefits.

The key to a successful purchase lies in **thorough due diligence**:

- Verify the overhaul was performed by a **certified and reputable facility**.

- Ensure the engine has **comprehensive documentation**, including inspection reports and part replacements.

- Confirm **cylinder and component compatibility** with the P/N provided.

- Budget for **higher maintenance costs** and **longer repair times** than modern engines.

- Consider whether the **operational limitations** (e.g., noise, vibration, performance) align with your intended use.

If you are an experienced aircraft owner with access to radial engine expertise and are willing to invest in maintenance, an overhauled R-1830 can be an excellent choice for preserving or restoring a classic aircraft. For casual or primary flight operations, the long-term costs and complexities may outweigh the benefits.

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### **Recommendation**

1. **If you are restoring or operating a classic aircraft (e.g., Beechcraft 18, Cessna 310, or warbird):**

Proceed with the purchase, provided the overhaul is from a **trusted facility** and the engine meets all FAA requirements. Budget for **regular inspections, oil consumption, and potential part replacements**. Consider joining radial engine forums (e.g., **Radial Engine Owners Group**) for support and advice.

2. **If you are a primary pilot or operate the aircraft frequently for personal use:**

Weigh the **higher maintenance costs** against the benefits. If you lack experience with radial engines, consider **training a mechanic** or partnering with an AMO that specializes in radials. Alternatively, explore modern engines (e.g., Lycoming IO-360, Continental IO-550) if your primary goal is reliability and low operating costs.

3. **If you are purchasing for investment or resale:**

Be cautious. The R-1830 s niche appeal may not translate to broad marketability, and the engine s long-term costs could reduce your return on investment. Consider whether the aircraft s overall condition and market demand justify the engine choice.

4. **Always obtain:**

- A **detailed overhaul report** from the facility.

- **FAA approval or STC** for the engine if it s not a standard model.

- **Independent inspection** by a trusted mechanic before finalizing the purchase.

In summary, an overhauled

Details:

Expedited shipping is available upon request. It is Unknown if this cylinder standard bore or oversized, but it does have a strip of orange paint which may indicate that chrome plated. Serial Number: 11757A. Includes serviceable tag with overhaul date of 03-17-2016.

Part Number: 116733. There are areas where the fins bent/scratched - please see photos. Overhauled Aircraft R1830 Radial Engine Cylinder, p/n 116733: Cylinder.

part #: 116733 price

  • $1750.00

specifications engineaviatio:

  • brand: Unk
  • mpn: 116733
  • part type: Engine Cylinder

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  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Buyer

seller engineaviatio:

  • # reviews: 4755
  • city: Apple Creek, Ohio
  • rating: 100.0%

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shipping engineaviatio:

  • carrier: UPS
  • type: Calculated
  • class: Standard
  • cost: $55.97
  • service: UPS Ground
  • transit: 3-7 Days

general engineaviatio:

  • Aviation Parts Accessories > Engines > Engine Components
  • condition: Remanufactured

offer engineaviatio:

  • best offers: True
  • sold: 0
  • availability: In Stock
  • quantity: 1
  • started: March 2, 2026
  • options: Ship-to-home
part type: engine cylinder,
category: auto parts > aviation parts accessories > engines > engine components, sku: 8338958054002861,
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1 offer $1750.00 USD
  • Remanufactured. Offer #1 priced at $1750.00 + $42.65 shipping estimate = $1792.65* total. 010. This item has a green strip of paint which may indicate that it is oversized.+$42.65 shipping

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