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  3. UNK 116731

UNK 116731 Overhauled Aircraft Radial Engine Cylinder R1830 P/n .010

116731 Unk Overhauled Aircraft R1830 Radial Engine Cylinder P/n Plus .010

( Brand: Unk ), ( Manufacturer Part Number: 116731 ), ( Part Type: Engine Cylinder )

Review UNK Overhauled Aircraft Radial Engine Cylinder P/n Plus .010

The **UNK 116731 Overhauled Aircraft R-1830 Radial Engine Cylinder (Part Number: 010)** represents a meticulously restored component from the legendary Pratt & Whitney R-1830 Twin Wasp, a powerplant synonymous with aviation history and unmatched reliability. This overhauled cylinder exemplifies the engineering precision of an era when durability and performance were paramount, particularly in the iconic Douglas DC-3, Lockheed Constellation, and other classic radial-engine aircraft. The **R-1830** a nine-cylinder, air-cooled radial engine has long been celebrated for its robust construction, and this specific cylinder (PN 010) is a testament to that legacy, having undergone a comprehensive overhaul to meet or exceed original manufacturer specifications. The overhaul process includes rigorous inspection, replacement of all worn or degraded internal components, dynamic balancing, and meticulous machining to ensure flawless operation. Each cylinder is crafted from high-grade aluminum alloy, featuring a robust cylinder barrel, precision-fitted piston assembly, and a robust valve mechanism designed to withstand the extreme stresses of high-altitude and high-power operations. The **010 part number** indicates a standardized, interchangeable component, ensuring seamless integration into existing engine assemblies without compromising performance. Whether used in a vintage restoration project, a flying museum exhibit, or a private collector s prized aircraft, this overhauled cylinder guarantees not only reliability but also a piece of mechanical history that embodies the spirit of mid-20th-century aviation engineering. Its inclusion in an R-1830 powerplant ensures optimal combustion efficiency, reduced wear on adjacent components, and the kind of dependable performance that has earned the Twin Wasp its reputation as one of the most enduring engines in aviation history.

### **Pros and Cons of Buying an Overhauled Pratt & Whitney R-1830 (UNK 116731) Engine with Cylinder P/N 010**

#### **Pros**

1. **Proven Reliability** The R-1830 is a classic radial engine with decades of operational history in aircraft like the Beechcraft 18, Cessna 180/182, and others. When properly overhauled, it can provide many more hours of trouble-free service, especially if maintained under strict guidelines.

2. **Availability of Parts and Support** Due to its widespread use, finding replacement parts, cylinders (P/N 010 is a common variant), and overhaul services is relatively easier than for less common engines. Many aviation repair stations specialize in R-1830 maintenance.

3. **Lower Initial Cost Compared to Modern Engines** An overhauled R-1830 is significantly cheaper than a new or even a rebuilt modern Lycoming or Continental engine. This makes it an attractive option for budget-conscious operators, especially for older aircraft.

4. **Simpler Maintenance (Compared to Modern Engines)** Radial engines like the R-1830 have fewer electronic components and simpler fuel/ignition systems than modern turbocharged engines. This can reduce maintenance complexity for operators with limited mechanical expertise.

5. **Potential for Long-Term Use** With proper overhaul and maintenance, an R-1830 can easily exceed **2,000 hours** between major overhauls, making it a cost-effective powerplant for high-time aircraft.

6. **Nostalgic and Collectible Appeal** For enthusiasts, the R-1830 has a strong historical and aesthetic value, particularly in classic training and utility aircraft.

7. **No Turbocharger or Complex Induction Systems** Unlike turbocharged engines, the R-1830 does not require wastegate adjustments, intercooler maintenance, or turbo failure concerns, which can be a significant advantage in high-altitude or hot-climate operations.

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#### **Cons**

1. **Higher Fuel Consumption** Radial engines are less fuel-efficient than modern horizontally opposed (Lycoming/Continental) engines. Expect ** 12 15 GPH** (gallons per hour) compared to ** 8 10 GPH** for a modern 200 300 HP engine. This increases operating costs, especially for high-time aircraft.

2. **Noise and Vibration** The R-1830 is significantly louder and more vibration-prone than modern engines. This can be uncomfortable for passengers and may require additional soundproofing or vibration dampening in the aircraft.

3. **Higher Maintenance Requirements** While simpler than turbocharged engines, radials still require:

- **Regular cylinder inspections** (P/N 010 cylinders should be checked for cracks, wear, and proper compression).

- **Magneto and ignition system maintenance** (points, condensers, and spark plugs must be serviced more frequently than in modern engines).

- **More frequent oil changes** (due to carbon buildup and wear).

- **Propeller synchronization checks** (if equipped with a constant-speed prop).

4. **Limited Performance at High Altitudes** Without a turbocharger, the R-1830 loses power as altitude increases. This can restrict operations in mountainous or high-altitude regions unless the aircraft is equipped with a **supercharger** (which adds complexity).

5. **Depreciation Over Time** While an overhauled R-1830 may be cheap to buy initially, its value depreciates faster than modern engines. If you plan to sell the aircraft later, a newer powerplant (e.g., IO-520, IO-540, or PT6) may fetch a higher resale price.

6. **Environmental and Noise Regulations** Some airports and flight schools have **noise restrictions** that may limit operations of radial-engine aircraft, especially during early morning or late evening hours.

7. **Potential for Hidden Issues** Even an "overhauled" engine may have:

- **Undetected cracks in the crankcase or cylinder barrels** (common in high-time R-1830s).

- **Worn or improperly rebuilt pistons/connecting rods** (leading to catastrophic failure if not inspected).

- **Fuel system issues** (carburetor icing, float chamber leaks, or improper mixture settings).

- **Propeller synchronization problems** (if not properly balanced, this can cause excessive vibration).

8. **Limited Manufacturer Support** Pratt & Whitney no longer produces the R-1830, so **warranty coverage is nonexistent**. Any issues after purchase must be resolved through third-party repair stations, which may charge premium rates.

9. **Fuel Type Limitations** The R-1830 typically runs on **100LL aviation gasoline**, which is more expensive than automotive fuel. Some older models may also require **100/130 octane**, adding to operational costs.

10. **Difficulty Finding Skilled Mechanics** While not as rare as some engines, finding mechanics with **specialized R-1830 experience** can be challenging, especially in regions where these engines are less common.

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### **Key Considerations Before Purchase**

1. **Engine Logbooks and History** Request **full engine logs**, including:

- **Overhaul records** (who performed it, what was replaced, and at what hour).

- **Cylinder inspections** (are P/N 010 cylinders within serviceable limits?).

- **Magneto and ignition system checks** (last overhaul date).

- **Oil analysis reports** (indicates wear metals and contamination).

2. **Airframe Condition** The R-1830 is often paired with older airframes (e.g., Beech 18, Cessna 180). Ensure the **airframe itself is airworthy** and not structurally compromised.

3. **Propeller Compatibility** If the aircraft has a **constant-speed prop**, verify it is properly synched and not causing excessive vibration.

4. **Fuel System Integrity** Check for:

- **Carburetor icing potential** (if not equipped with an anti-ice system).

- **Fuel strainer and lines** for leaks or blockages.

- **Mixture and throttle response** (hunting or sluggishness can indicate carburetor issues).

5. **Oil and Filter Condition** Fresh oil and a clean filter are critical before flight. Old oil can indicate **internal wear** or **contamination**.

6. **Bore Scope Inspection** If possible, have a mechanic perform a **bore scope check** of the cylinders to look for **scoring, cracks, or excessive wear**.

7. **Test Flight** Always conduct a **pre-purchase test flight** to check for:

- **Smooth power delivery** (no rough spots or misfires).

- **Proper RPM response** (no hesitation or surging).

- **Exhaust sound** (should be even across all cylinders).

- **Vibration levels** (excessive vibration can indicate propeller or engine imbalance).

---

### **Ending Conclusion**

The **overhauled Pratt & Whitney R-1830 (UNK 116731) with P/N 010 cylinders** is a **viable and cost-effective choice** for operators of classic aircraft who prioritize **affordability, simplicity, and historical appeal**. It excels in **low-altitude, general aviation roles** where fuel efficiency is not a major concern, and maintenance can be managed by experienced mechanics.

However, it is **not the best long-term investment** for those seeking **modern reliability, fuel efficiency, or high-altitude performance**. The **higher fuel burn, noise, vibration, and maintenance demands** make it less ideal for **commercial operators, flight schools, or high-time aircraft** where resale value and operational efficiency matter most.

### **Final Recommendation**

**Buy the R-1830 if:**

You are operating a **low-time or high-time classic aircraft** (e.g., Beech 18, Cessna 180/182) where cost is a primary concern.

You have **access to a qualified radial engine mechanic** for regular maintenance.

The aircraft will be used in **low-altitude, non-commercial operations** (e.g., personal use, crop dusting, or bush flying).

You are **comfortable with higher fuel consumption and noise levels**.

The engine has **a clean overhaul history** with **no signs of hidden issues** (verified through logs, inspections, and test flight).

**Avoid the R-1830 if:**

You need **fuel efficiency** (consider a Lycoming IO-540 or Continental IO-520 instead).

The aircraft will be used in **commercial operations** (higher insurance costs and passenger comfort concerns).

You lack **access to specialized radial engine maintenance**.

The engine lacks **transparent overhaul records** or shows signs of **neglect or poor rebuild quality**.

You plan to **sell the aircraft in the future**, as modern engines hold better resale value.

**Alternative Consider

Details:

Serial Number: 21613B. Part Number: 116731. Includes serviceable tag with overhaul date of 03-17-2016. Expedited shipping is available upon request.

Overhauled Aircraft R1830 Radial Engine Cylinder, p/n 116731, Plus .010 .010: Cylinder.

part #: 116731 price

  • $1750.00

specifications engineaviatio:

  • brand: Unk
  • mpn: 116731
  • part type: Engine Cylinder

shipping engineaviatio:

  • cost: $50.82
  • service: UPS Ground
  • carrier: UPS
  • transit: 2-5 Days
  • class: Standard
  • type: Calculated

returns engineaviatio:

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

offer engineaviatio:

  • quantity: 1
  • availability: In Stock
  • best offers: True
  • options: Ship-to-home
  • sold: 0
  • started: March 2, 2026

seller engineaviatio:

  • rating: 100.0%
  • # reviews: 4754
  • city: Apple Creek, Ohio

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general engineaviatio:

  • Aviation Parts Accessories > Engines > Engine Components
  • condition: Remanufactured
part type: engine cylinder,
category: auto parts > aviation parts accessories > engines > engine components, sku: 8335174687417721,
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1 offer $1750.00 USD
  • Remanufactured. Offer #1 priced at $1750.00 + $42.28 shipping estimate = $1792.28* total. 010. This item has a green strip of paint which may indicate that it is oversized.+$42.28 shipping

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