Mooney · 1963–1966

Mooney M20D Master (1963-1966)

mooneyfixed-gearlow-wingefficientTrainercomplex-trainer-budget180hprare

Specifications

Performance

Cruise

130KTAS

Range

600nm

Climb

925fpm

Ceiling

17,000ft

Fuel Burn

9.5gph

Fuel Cap.

48gal

MPG

15.7mpg

Stall (Vs0)

52KIAS

T/O roll

850ft

Ldg roll

480ft

Size & weight

Seats

Useful Load

1,085lbs

Full-fuel payload

797lbs

Max gross

2,575lbs

Wingspan

35ft

Length

23.2ft

Engine

Lycoming O-360-A1D

Power

180hp

TBO

2,000hrs

Overhaul

$45k

Owning it

Hull insurance

$1k/yr

Parts

fair

Mechanics

specialist

Gear

Fixed

IFR

Yes

V-speeds

Vne164 KIAS

Vno128 KIAS

Va115 KIAS

Vs160 KIAS

Vx70 KIAS

Vy90 KIAS

Best glide85 KIAS

Airframe

Empty weight: 1,490 lbs
Max fuel weight: 288 lbs
Height: 8.4 ft
Wing position: low
Auto fuel (mogas): Not approved for auto fuel

Obstacle performance

Takeoff over 50 ft: 1,395 ft
Landing over 50 ft: 1,340 ft

Paperwork

Type certificate: 2A3
Certification basis: CAR 3

These figures are typical for the model, not a specification for any individual aircraft. Real-world numbers vary with year, installed equipment, weight, modifications and engine condition — often by more than you would expect. Use them to compare types, and confirm anything you would act on against the Pilot's Operating Handbook for that specific airframe and a prebuy inspection.

Pricing

Typical

$55k

Range

$35k – $75k

Annual all-in

~$21k/yr

All-in at ~100 flying hours a year, using the midpoint of each range — the same figures broken out under “Cost to own” below. Your number will differ, and mostly for two reasons. Experience sets your insurance: a 2,000-hour pilot with recent training pays 30–40% less than a 200-hour owner, and student owners pay 20–40% more — on the same aircraft that is often a doubling. Location sets your hangar: a T-hangar runs $200–400 a month in the Midwest against $400–1,500 in a coastal metro, and an outside tie-down is less again. Engine reserves move too — a local shop reusing your serviceable cylinders can come in 30–50% under the national specialty-shop pricing we quote, though you trade the warranty and turnaround that comes with it. Reserves are money set aside toward a future overhaul, not a bill this year, and the annual inspection figure is the shop’s labor to look — whatever they find is separate.

Cost to own — estimate

Set your yearly hours and local fuel price. Fixed costs (insurance, hangar, annual inspection) don't change with hours; fuel, maintenance and the engine reserve do.

Hours per year100

201000

100LL price ($/gal)$6.50

3.0010.00

Owners sharing the aircraftFixed costs split; fuel, reserves and wear stay yours.

Fuel (9.5 gph): $6,175
Engine reserve: $2,250
Maintenance, parts & wear items ($12/hr): $1,200
Insurance: $900–$1,800
Hangar: $4,872–$12,180
Annual inspection (labor only): $1,200
Databases & subscriptions: $400
Total per year: $21,101
Per flight hour: $211
Miles flown / year (at cruise): 14,960 mi
Cost per mile: $1.41/mi

What a trip costs300 nm

100 nm1,000 nm

Time in the air: 2 hr 18 min
Fuel burned: 22 gal
Out of pocket: $222

Fuel, engine reserve and wear only. Insurance, hangar and the annual are already paid whether you make the trip or not, so they are not charged here.

Estimate, not a quote. Where a line shows a range, the total, per-hour and per-mile figures use its midpoint— insurance moves most with your experience and time in type, hangar with where you base the aircraft, so your own number could sit at either end. Annual inspection is the shop's labor to open and inspect — what they find is the maintenance line, which covers oil changes, plugs, tires, brakes, hoses, lights, a battery and vacuum pump amortised over their life, and the unscheduled squawks that are the largest and least predictable part of it. Reserves are sinking funds toward an overhaul, not a bill you pay this year — and note that a propeller is due on hours or calendar time, typically six years, so flying less does not put it off forever.

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Strengths

Only fixed-gear Mooney ever built—rare collector appeal
Lowest insurance and maintenance costs in the Mooney lineup
Simple, proven Lycoming O-360 engine
4-seat capability with 1,085 lb useful load

Weaknesses

130 KTAS cruise barely faster than Piper Cherokee or Cessna 172 despite higher cost
Fewer than 20 unconverted examples remain; most have been converted to retractable
Significantly slower than M20C/E (164 kt Vne vs. 174 kt)—10-knot speed penalty
Only 48–52 gallons fuel capacity limits range to ~600 NM

Overview

The 1963 Mooney M20D Master is the only fixed-gear Mooney ever produced -- a market experiment where Mooney converted the retractable M20C/E into a fixed-gear airframe to compete with the Piper Cherokee and Cessna 172 in the budget 4-seat trainer market. Production: approximately 79 units across 1963-1966, making it the rarest M20 variant by a wide margin.

The M20D failed in the market for predictable reasons: fixed gear defeated the purpose of a Mooney. Without the retractable gear's drag reduction, the M20D cruises at only 130 KTAS -- faster than a 172 but barely faster than a Cherokee 180, and at a higher purchase and operating cost. Mooney discontinued the variant in 1966 and refocused on retractable models.

The Conversion

Most M20Ds have been field-converted to M20C retractable configuration under a Mooney-approved STC. The conversion involves:

Installing retractable main and nose gear
Replacing fixed-gear wheel fairings with gear doors
Modifying the wing structure for gear retraction
Updating the aircraft type plate to reflect M20D-converted-to-M20C status

Of the original ~79 M20D production, fewer than 20 unconverted examples remain in service as fixed-gear airplanes. The remainder fly as field-modified M20Cs.

Performance (Unconverted M20D)

Cruise: 130 KTAS at 7,500 ft (75% power)
Climb: 925 FPM at gross
Fuel burn: 9.5 GPH cruise
Range: 600 NM with reserves at 52 gal fuel
Useful load: 1,085 lbs

The M20D's only practical advantage over the retractable M20C is lower insurance and maintenance cost (no gear hydraulics to maintain). For pilots without complex/HP endorsements, the M20D is the cheapest Mooney to insure and operate.

Certificated limits — three things the data plate decides

TCDS 2A3 Rev 58, Section V is the M20D's own section. Three points a buyer should check against the airframe in front of them:

The M20D is slower-limited than the M20C and M20E, and by a lot. Its limits are Va 115, Vne 164, Vfe 87, Vno 128 knots — a single set covering every serial, with no serial split of the kind the C and E carry. The certificate prints these in mph with knots in brackets ("189 m.p.h. (164 knots) True Ind."); the knots are what belong on an airspeed indicator marked in knots. A late M20C is redlined at 174 knots; the M20D at 164.
Fuel is 48 gallons at or below S/N 200, and 52 from S/N 201 up. The eligible serials are S/N 1 and 101 through 260, so the 48-gallon airplanes are the majority of the run. The frontmatter carries 52; on a low-serial airframe subtract four gallons and about fifty miles.
Gross weight is 2,575 lb with a constant-speed propeller and 2,500 lb with the McCauley fixed-pitch installation. The frontmatter carries 2,575. On a fixed-pitch M20D the useful load is 75 lb lower than this page shows.

There is no landing-gear-extended limit in Section V, because the M20D has no retractable gear. For the field-converted airplanes described above, NOTE 2 adds a separate placard: 120 mph (104 knots) both to extend and to operate the gear.

Valuation Factors

Configuration	Price Range
M20D unconverted (rare)	$35,000-$60,000
M20D converted to M20C (most examples)	$55,000-$100,000 (per M20C pricing)

Unconverted M20Ds appeal to a narrow collector market and pilots seeking the cheapest Mooney to insure. Converted M20Ds trade at standard M20C prices.

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ADs & Common Problems

Conversion documentation: Verify M20D-to-M20C conversion paperwork including STC compliance and airworthiness directive completion.
Wing structure inspection: M20D-to-M20C conversion involves wing modifications; verify post-conversion structural integrity.
Universal Mooney concerns: Steel tube tail rust, fuel bladders, O-360 cylinder condition.
Rarity premium: Don't pay more than $60,000 for an unconverted M20D unless it has exceptional restoration condition.