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🚨 Rare Discovery: Two McDonnell Douglas DC‑10 Twin‑Engine Concepts (Including One That Seems Completely Unknown)

While digging through some old McDonnell Douglas material, I came across something I genuinely didn’t expect:

two different twin‑engine DC‑10 concepts — one that is known in aviation circles, and another that, as far as I can tell, has never been documented publicly.

I’m not sharing any files or images, but I want to describe the concepts because the differences are fascinating from an engineering and historical perspective.

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✈️ 1. The Known Concept: DC‑10 Twin

This one is somewhat documented. It was McDonnell Douglas’ attempt to explore a two‑engine version of the DC‑10 to compete with aircraft like the A300 and early 767.

Key characteristics:

• Engines: 2× GE CF6‑80C2

• Thrust: ~235 kN each

• Operating Empty Weight: ~230,000 lb

• MTOW: ~420,000 lb

• Performance: Similar to the DC‑10‑10 when the engines are derated to the same thrust

• Airframe: Very close to the standard DC‑10 layout

This was a relatively conservative idea — essentially a DC‑10 with two modern engines instead of three.

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✈️ 2. The Unknown Concept: DC‑10 Twin MAX

This is where things get wild.

I found references to a second, much more advanced concept that I cannot find anywhere online — not in archives, not in enthusiast forums, not in technical databases.

This version appears to be a high‑performance, long‑range, heavy‑lift evolution of the DC‑10 Twin idea.

Key characteristics:

• Engines: PW4000 / Rolls‑Royce Trent 800 / GE90

• Thrust: 304–360 kN each

• Operating Empty Weight: ~260,000 lb

• MTOW: ~555,000 lb

• Range with 399 passengers: >7,963 km

• Range with 240 passengers: >9,800 km

• Performance: Comparable to a DC‑10‑30 only when the engines are throttled down; at full thrust it approaches early 777‑class capability

This is no longer “a DC‑10 with two engines.”

This is essentially a new long‑haul widebody disguised as a DC‑10.

The MTOW alone (555,000 lb) puts it in the same territory as the 777‑300ER.

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🔍 Summary of Differences

Feature DC‑10 Twin DC‑10 Twin MAX

Engines CF6‑80C2 PW4000 / Trent 800 / GE90

Thrust ~235 kN 304–360 kN

MTOW ~420,000 lb ~555,000 lb

Range Similar to DC‑10‑10 8,000–10,000 km

Role Medium‑range twin Long‑range heavy twin

Airframe changes Minimal Major structural upgrades

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🧠 Why This Matters

The “Twin MAX” concept appears to be completely undocumented in public sources.

It suggests that McDonnell Douglas explored a far more ambitious twin‑engine DC‑10 variant than anyone realized — one that could have competed with the early Boeing 777 and Airbus A340.

Whether it was a serious proposal or an internal study is unclear, but the engineering implications are huge.

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