A case could be made that the Martin Model 170 Mars four-engine flying boat doesn't even belong in a site devoted to warplanes, since it didn't go operational until after the war. But the giant Mars quickly became a legend in its own time.
Designed as a very-long-range patrol bomber, it was converted to a very successful cargo carrier. When wartime planners wrote about water-based air transport in the postwar world, the Mars was the kind of plane they had in mind. When increasing performance of land-based transport planes made the water-based transport model obsolete, the Mars planes were ultimately sold off. The survivor still serves as a water-bombing fire fighter.
- A two-page Martin ad, "Preview of Tomorrow" shows the XPB2M-1 on hardstand in front of "the world's largest door."
This photo must be of the first rollout: the nose is masked over, the engine cowlings have not yet been installed. Apparently, some of the photo was cropped in preparing it for the two-page spread; I have tried to match up structure lines as well as possible. Also note the camouflaged B-26s in the background.
- A news clip photo shows the XPB2M-1 on hardstand. This photo seems to have been taken as part of the same rollout ceremony as the two-page Martin ad above.
- A Purolator ad shows a Mars on the water, seen from just aft of 3 o' clock.
- A news clip with photo, "Mars makes initial flight" shows the XPB2M-1 prototype Mars at takeoff, seen from 2 o'clock.
- A news photo shows a Mars on the water unloading passengers through the port forward hatch.
- A two-page Martin ad, "for Today's Lifelines, Tomorrow's Airlines" shows a Mars in flight, seen from 10 o'clock high.
- A Holley Carburetor Co ad, "A message from Mars for Hitler and Hirohito" shows two Mars apparently on final approach to a water landing, seen from 11 o'clock.
- A Martin ad, "Who are these Men and Women?" shows what may be the iconic shot of the Mars straight head-on with the staff of the Experimental Department arrayed on and beneath the wings.
- A Rohm & Haas Co ad, "Plexiglas on Mars" shows the nose of a Mars in closeup.
- "Martin Mars" [ HTML ] is a color Gallery photo of a Mars on the water, seen from 2 o'clock, middle distance.
- A Martin ad shows cutaways of two versions of the Mars:
- A Curtiss Electric Propellers ad, "Greater warloads for the Mars" shows a color painting of a Mars at dockside, seen from forward. PBM and B-26 in the background.
- A Martin ad, "Answer to an Airline's Prayer
" shows a Mars on the water, seen from 5 o'clock, and 5 detail photos of the interior of the transport configuration.
- A Warren McArthur Corp ad (they made seats), "Fatigue" shows a Mars in flight, seen from 11 o'clock low. The ad includes a roster of the major aircraft manufacturers using Warren McArthur products.
- A Martin ad, "The Martin Mars affects your postwar plans!" has three cutaway, one for each of the proposed versions: 170-21 passenger transport, 170-22 cargo transport, and 170-23 combination carrier.
- A news photo shows flight engineer's control panel in a Mars.
- A Martin ad includes photos of internal structure, wing leading edge and fuel tanks, of the Mars.
- Flying's "Gallery" for August, 1945, shows a color photo of the flight engineer's control panel.