COX TEE DEE .020 MODEL AIRPLANE GLOW ENGINE – NEW IN BOX 
 NEVER REMOVED – COMPLETE WITH TOOLS & PAPERWORK - 
STOCK #160

: Condition Assessment:

Item Description

The Cox Tee Dee .020 (#160) is one of the most desirable small‑displacement contest engines ever produced by Cox. Featuring a front rotary valve, precision porting, and extremely high RPM capability, the Tee Dee series represented Cox’s highest‑performance line.

This example is museum‑grade, untouched, and complete — the kind of condition serious Cox collectors rarely encounter.

Technical Specifications

(Verified from Aeromodeller test report and Cox engine database)

• Engine Type: Glow ignition, shaft rotary‑valve front intake

• Displacement: 0.01993 cu in (0.3266 cc)

• Bore: 0.300 in (7.62 mm)

• Stroke: 0.282 in (7.16 mm)

• Weight: 21 g (engine only), 24 g with tank

• Peak Output: ~0.055 BHP at 23,000 RPM on 30% nitro

• Propeller (original spec): 3‑1/8 × 2‑1/2 Cox 3‑blade

• Height: Approx. 1.25 in from centerline to glow head terminal

• Cox Order Number: #160

Production History

• Introduced: 1961

• Discontinued: 1996

• Production Span: 35 years

• Estimated Quantity Produced: Cox produced millions of engines overall, but the Tee Dee .020 was a specialty contest engine with far lower production than the .049 line. Surviving new‑in‑box examples are scarce.

Short History of the Cox Engine Company

• 1951: First Cox model engine, the Space Bug .049, completed

• 1952–2000: Cox becomes the world’s dominant small‑engine manufacturer, producing millions of engines for airplanes, cars, and boats

• 2009: Estes ends production; remaining inventory sold to private buyers

• 2019: MECOA acquires Cox Hobbies and remaining assets

Cox engines remain the most collected small-displacement model engines in the world.

Collectability & Rarity

This specific engine checks every collector box:

• New in box

• Never removed from inner packaging

• Includes all original tools & instructions

• High‑performance Tee Dee series

• Smallest Tee Dee displacement (.020)

• Long discontinued (1996)

• Far fewer produced than .049 engines

NOS Tee Dee .020s are considered investment‑grade pieces in the Cox community.

Why Collectors Want This Engine

• One of Cox’s highest‑revving engines ever produced

• Legendary contest‑grade performance

• Precision‑machined front rotary valve

• Perfect for display, micro‑RC, or 1/2A nostalgia builds

• Increasingly scarce in untouched condition

• Represents the golden era of American model engine manufacturing

• 🦊 Coyote Hobby Collector’s Note 🦊

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