Few things in this world compare to the sound of a Rolls Royce or Packard Merlin flying by in any of the iconic aircraft it powered. Our mission is to keep that sound alive for many generations to come. This is what drives us at Roush Aviation.

The Rolls Royce and Packard built Merlin engine is truly a work of art, a testament to the designers, assemblers, and maintainers. It’s a historic engine that still, almost 70 years later, is powering some of the most historic aircraft of all time. While the Merlin engine was well ahead of it’s time for its design, is now almost 70 years later, running low on parts and service life. While many in the past and present have done the admirable job of doing what they could with the parts they had, we have stepped forward to provide the services and new PMA parts necessary to ensure the Merlin engine remains where it belongs in history, in the sky. As part of Roush Aviation, we maintain and operate two North American Aviation P-51 Mustangs, a P-51B “Old Crow”, and a P-51D “Gentleman Jim”.

All of our repairs, alterations, and PMA parts are tested on our test stand and approved. After approval, we fly behind them. All parts and services are flown by us first before being offered to our customers.

Roush Aviation is the only company that is certificated by the FAA as a Repair Station authorized to overhaul the Rolls Royce and Packard V-1650 Merlin Engine. Beyond the overhaul of our customer’s engines, we also provide routine inspection and maintenance services at your hangar or ours.

While most know Roush Aviation for its FAA Certificated Repair Station specializing in the Overhaul and Service of the Merlin Engine, or our numerous FAA PMA Parts, we also have the capability to provide one off, of low production runs of replacement parts for vintage and warbird aircraft. In the past, we have provided replacement parts for various restorations including: P-51 Mustangs, P-47 Thunderbolts, P-38 Lightnings, F4U Corsairs, and B-17 Flying Fortresses. These replacement parts are either made from the original drawings or reverse engineered using scanning technology.

In addition to our machining and fabrication services, we also offer composite molding services for experimental aircraft.

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Pistons

Roush Aviation’s FAA PMA pistons are machined from Aerospace Quality 2618-T61 Aluminum Forgings. Using technology and knowledge gained from experience in motorsports and performance engine development, our pistons are redesigned from the original Packard and Rolls Royce Pistons to create a piston with better operating characteristics over the original piston design. All of our pistons now come standard with anodized piston ring grooves and domes. Additionally, our pistons can be ordered with our optional thermal barrier dome coating and / or optional friction reducing skirt coating. Pistons are available for 5.395”, 5.400”, 5.403” and 5.405” bore sizes.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com>

Piston Rings

Roush Aviation’s FAA PMA piston rings are designed to operate as a set to work with our PMA piston. The ring set consists of a moly filled steel compression ring, a moly filled steel oil scraper ring, and a two piece iron oil supply ring. This modern ring package provides optimum compression sealing and oil control, with a reduction in drag from the original ring package.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Piston Pins

Roush Aviation’s FAA PMA piston pins are manufactured from aerospace quality AMS 6260 steel alloy. These pins are designed as replacements for the stronger Rolls Royce Transport Style Piston Pins. Our PMA pins are available in sizes from Standard to 0.020” oversize.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Piston Pin Bushings

Roush Aviation’s FAA PMA piston pins are manufactured from aerospace quality Aluminum Bronze alloy. Our PMA bushings are precision machined to higher quality and tolerances than the original parts. Our PMA Bushings are available in sizes from Standard to 0.020” oversizes.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Cylinder Head Nuts (V-1650 and Transport)

FAA PMA Steel Head Nuts are a direct replacement for the original bronze nuts. These nuts are made from AN fastener grade material and are substantially stronger than the original Packard or Rolls Royce parts. Available for Packard and Rolls Royce Transport styles.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Camshafts (V-1650-7, -9, Transport D26917)

FAA PMA camshafts made from aerospace grade 8620 material and available in three different profiles: V-1650-7, V-1650-9, and Rolls Royce Transport 620 (D26917). Camshafts are selectively hardened on the lobe surfaces only with a thicker cross section on the quill to alleviate the problem of cracking found with original camshafts.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Roller Camshafts and Rocker Arms

FAA PMA Roller Camshaft Package. This is ultimate upgrade for the Merlin Engine. Reduced maintenance, virtually no wear, no chrome or carbide pads to worry about. Our special roller camshafts are manufactured to the same detailed processes of our standard camshafts. However, they are specially ground to work with our FAA PMA 17-4PH stainless steel roller rocker arms.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Valve Springs Sets (V-1650-7, -9 and Transport)

FAA PMA replacement valve springs manufactured to the highest quality spring wire and tested to over 10 million cycles without failure. Available in sets to work with V-1650-7, V-1650-9, and Rolls Royce Transport engine spring seats and retainers. Available in sets only, not available individually.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Inlet Valves

FAA PMA replacement Inlet Valves, manufactured from Inconel X751 with Stellite weld inlay on the seat and tip surfaces. Our valves are manufactured from a stronger high temp alloy material than the original valves. Our FAA PMA Valves are compatible with original valve seats and guides or our FAA Approved valve seats and guides.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Exhaust Valves

FAA PMA replacement Inlet Valves, manufactured from Inconel X751 with Stellite weld inlay on the seat surfaces and a tool steel tip. Our valves are manufactured from a stronger high temp alloy material than the original valves and are sodium filed like the original valves. Our FAA PMA Valves are compatible with original valve seats and guides or our FAA Approved valve seats and guides.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Spark Plug Insert

FAA PMA replacement Spark Plug Insert manufactured to the original drawings and specifications.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Spark Plug Insert Nut

FAA PMA replacement Spark Plug Insert manufactured to the original drawings and specifications.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Ignition Harness

FAA PMA replacement Ignition Harness and Spark Plugs. Stop using old, unknown condition, expensive spark plugs. Switch to our ignition harness and spark plugs and save money and maintenance time. Our Harness has been thoroughly tested in all conditions, up to 37,000 ft altitude, rain, IMC conditions, without failure, issue, or increase in RFI noise.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

RA-QL57 Spark Plugs for Ignition Harness

FAA PMA replacement Ignition Harness and Spark Plugs. Stop using old, unknown condition, expensive spark plugs. Switch to our ignition harness and spark plugs and save money and maintenance time. Our Harness has been thoroughly tested in all conditions, up to 37,000 ft altitude, rain, IMC conditions, without failure, issue, or increase in RFI noise

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

3/8” Exhaust Stud

FAA PMA replacement 3/8” exhaust stud hardware manufactured from stainless steel to decrease degradation due to corrosion. FAA PMA’d for V-1650-9 and Rolls Royce Transport, and available as an upgrade to V-1650-7 cylinder heads through our FAA Repair Station.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

3/8” Exhaust Stud Nut

FAA PMA replacement 3/8” exhaust stud hardware manufactured from stainless steel to decrease degradation due to corrosion. FAA PMA’d for V-1650-9 and Rolls Royce Transport, and available as an upgrade to V-1650-7 cylinder heads through our FAA Repair Station.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

3/8” Exhaust Stud Lock Washer

FAA PMA replacement 3/8” exhaust stud hardware manufactured from stainless steel to decrease degradation due to corrosion. FAA PMA’d for V-1650-9 and Rolls Royce Transport, and available as an upgrade to V-1650-7 cylinder heads through our FAA Repair Station.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Coolant Header Tank Pressure Cap

FAA PMA replacement Coolant Header Tank Pressure Cap. Our Cap contains a schrader valve in the cap to pre-pressurize the coolant system before flight or use it to pressurize a cold system to perform a maintenance leak check. Pre-pressurization of coolant system with shop air to 14-15 psi prior to operation will increase the boiling point of the coolant by 45°F (25°C). This will reduce the risk of having localized boiling in the cylinder head which leads to cylinder head cracking. Our Header Tank Pressure Cap is also available with an o-ring type seal, by sending your header tank to our FAA Repair Station for alteration. Additionally both caps are available with oversize threads to repair header tanks with damaged threads.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Coolant Header Tank Pressure Relief Valve

FAA PMA replacement Coolant Tank Pressure Relief Valve. Our FAA PMA Relief Valve is designed to accurately control coolant system pressure at 34-36 psi. This Valve does not open early and bleed off pressure before its set opening point like the original valve.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Propeller Shaft Seal

FAA PMA replacement Propeller Shaft Seal. Our FAA PMA replacement propeller shaft seal is made by the original manufacturer using newer technologies in shaft seal design.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Supercharger Impeller Shaft Sealing Rings

FAA PMA Supercharger Sealing Rings. Our FAA PMA Supercharger Impeller Shaft Sealing Rings are manufactured to the original drawings, materials, and specifications. Both front and rear rings available.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Wheelcase Stud

FAA PMA replacement Wheelcase Attaching Studs. Our FAA PMA Wheelcase Studs are made to the original drawing and specifications using stronger material. This joint of the Merlin engine sees high loads due to the transmission of power to the supercharger. Manufactured and FAA PMA’d to replace worn and fatigued original studs.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com

Rocker Arm Lash Adjusting Tool

Roush Aviation Rocker Arm Lash Adjusting Tool with built in Torque wrench. Built-in torque wrench allows proper lash adjustment and torque tightening of tappet.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com>

Timing Plug Socket

Socket specially made for removing timing plug from lower crankcase.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com>

Propeller Shaft Rotating Tool

Tool to rotate the crankshaft, when the propeller is off the engine.

Bill Armour, Part Sales
Office: 734-779-7365, Fax: 734-779-7997
Email: William.Armour@Roush.com>