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1980 Mooney M20K 231/252 Firewall Forward

Published by runwayalliance on April 11, 2019April 11, 2019

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by Dave Mathieson
$110,000
Category
Sold
Location
Trenton Robbinsville (N87)
General Info
Make: Mooney Registration Number: N231GV
Model: M20K (231/252) Serial Number: 25-0249
Model Year: 1980 Engine: TSI0-360-MB1 (210 HP)
Location: Robbinsville, NJ  (N87) Gear: Retractable (electric)
  Prop: Constant Speed
Summary Info
Upgraded 231 to firewall forward 252 with MB1 engine, intercooler, turbocharger, wastegate, and cowl; Garmin 530W, King KFC200 Flight Director;  GTX 330 w/ ADS-B Out, 3-blade heated prop.  252 performance at a 231 price!
Logbook Time
Total Time: (Hours since New)      5232 Log books
1st airframe log missing up to 4/95
Engine: (Hrs SFRM)
       325 Prop:  (Since Overhaul )        325
Maintenance Info
Annual Due: (Date) Oct 2019 (fresh annual with sale)
IFR Certification Due: Sept 2020
AD’s complete:
Yes
Recent Maintenance Items: New battery; Turbo and pressure relief valve overhauled;
Other: Outboard wing skin & aileron replaced by Signature from ground incident in 10/99;  Gear-up landing repaired by Lapeer Aviation in 4/01; .
Features
Standard Features Added Features
Factory Oxygen (large bottle) TSIO 360-MB1 engine, intercooler, turbocharger, and wastegate
Boom Beam landing lights 3-blade heated prop
Stand-by vacuum system 252 Cowl
One-piece belly
Avionics
Make / Model
Nav/Com/GPS 1: Garmin GNS 530W
Com /GPS 2: Garmin GNC 300XL
Moving Map: Eventide Argus 7000/CE (integrated with GNC 300XL)
Nav 2: King KN53
Autopilot: King KFC200 Flight Director
HSI: King KCS-55A
Transponder: Garmin GTX 330 w/ ADS-B Out
Audio Panel: Garmin GMA 340
Weather: Ryan WX-10 Stormscope
Engine Monitor: JPI EDM 700
Fuel Flow: Shadin MiniFlo
Other: Radar Altimeter
Exterior
Color(s): White w/ Burgundy & Gold trim
Paint Condition:
(1 to 10, 10 being the highest)
6
Interior
Color(s): Light Gray
Fabric: Leather
Condition:
(1 to 10, 10 being the highest)
6
Glass: Good
Performance
Cruise Speed: (at 75% power) 185 kts *
Useful Load: (remaining after full fuel) 450 lbs *
Fuel Capacity: 75 gal
Fuel burn: (average) 13 GPH *
Range: 900 nm *
Specific Range: ((Efficiency = Cruise Speed ÷ Lbs per hour of fuel burn) (The higher the number, the better the efficiency)) 2.37
*Note: Performance figures are estimates based on best available information (from POH, Vref, etc.) and may not be exact for this particular aircraft.
Comments
Mooney drivers share a unique and deeply seated characteristic – they like to go fast!  Mooneys are among the most efficient and structurally sound airplanes manufactured.  The low profile cross-section and laminar flow wings reduce drag to enable the fast air speeds typically unachievable in other manufacturers’ airplanes with similar horsepower.  The tubular steel frame, acting as a cockpit roll cage, along with the wingtip-to-wingtip wing spar make the Mooney airframe the strongest and safest among GA airplanes.

The M20K 231 was the first non-pressurized Turbo Mooney.  Introduced in 1979, the 231 (numbered for it’s top speed) was hailed as the fastest single-engine production aircraft in the world.  It was an instant success and even outsold the ever so popular Mooney 201 during the first two years of production.

For the 231, the Mooney engineers capitalized on the aerodynamic airframe improvements already added to the Mooney 201 by installing an engine with a high horsepower to weight ratio – the Teledyne Continental TSIO 360 GB. This combination of engine and airframe gave Mooney drivers the optimum blend of high altitude flying coupled with incredible speed and performance synonymous with Mooney Aircraft.  The 231 included other improvements such as the NASA air scoop placed in the dorsal for improved cabin ventilation, new wing tips for better slow-speed control and enclosed navigation and strobe lights. 

In 1984, Mooney upgraded the GB  engine with the TSIO 360 LB1B which included a redesigned fuel distribution system plus nitrited cylinders, steel belted pistons, and a new rod design that resulted in more efficient power and extended service life.

In 1985, Mooney’s engineers were tasked with making as many improvements as possible to the 231 and bringing to the market a vastly improved airplane in 1986 – the M-20K 252TSE.  Among the improvements were improved engine cooling and a redesigned primary air induction system.  Just as monumental, TCM listened to customers and made big improvements to the LB engine that resulted in the MB1 version. The changes were many.  Most important were a tuned induction system for more even induction airflow to the cylinders, a larger Garret turbocharger, a manifold pressure controlling system allowing full throttle operations for takeoff, and the incorporation of an intercooler that cooled induction air temperatures by as much as 100 degrees F.  The improvements resulted in the 252 that ran cooler than the 231, required only 36 inches of manifold pressure versus 40 with the 231, and flew 10 kts faster than the 231.

This 231 was upgraded to the 252 MB1 engine and accessories that results in ease of operation and with 252 performance.  With the low time engine and prop, this airplane should provide serious cross-country pilots with years of service at a very affordable investment.

Contact Us About This Aircraft
Please call Dave Mathiesen at 609-259-2400
Show Contact Information

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N231GV_1384-b
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N231GV_1388-b
N231GV_1382-b
N231GV_1383-b
N231GV_1374-b
N231GV_1375-b
N231GV_1392-b
N231GV_1395-b
N231GV_1401-c
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