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Training flight of Bell P-39 Airacobras over Dale Mabry Army Air Field, circa 1942 REDD
Training flight of Bell P-39 Airacobras over Dale Mabry Army Air Field, circa 1942 REDD.png
 
Training flight of Bell P-39 Airacobras over Dale Mabry Army Air Field, circa 1942 REDD
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Why the white exhaust stains?
Every other picture I can recall that shows exhaust stains flowing back are black, dark grey, but I've never noticed white before.
Or is the original photo B&W, and somebody messed up when they colorized it?
 
Why the white exhaust stains?
Every other picture I can recall that shows exhaust stains flowing back are black, dark grey, but I've never noticed white before.
Or is the original photo B&W, and somebody messed up when they colorized it?
Likely mess up when colorized.
 
Likely mess up when colorized.
When I did a quick check on this, I ran across more with white exhaust stains.

What i ran across also is this: White exhaust stains on a P-39, especially near the tail section, are most likely due to lead residue from the tetraethyl lead added to the fuel. The high-octane fuel used in these aircraft contained tetraethyl lead to improve engine performance, and some of the lead would deposit on the fuselage as the exhaust gases cooled. The white stains are a result of this lead residue, sometimes described as "white chalk".
 
In 2004 P-39Q serial number 44-2911 was found in Lake Mart-Yavr, above the Arctic Circle in Siberia. The Airacobra had suffered an engine failure and crashed into the lake on November 1944. The remains of pilot Lt. Ivan Baranovsky were still inside. The aircraft is currently on display at the Niagara Museum of Flight, near where it was built.
In 2004 P-39Q serial number 44-2911 was found in Lake Mart-Yavr, above the Arctic Circle in Si...png
 
In 2004 P-39Q serial number 44-2911 was found in Lake Mart-Yavr, above the Arctic Circle in Siberia. The Airacobra had suffered an engine failure and crashed into the lake on November 1944. The remains of pilot Lt. Ivan Baranovsky were still inside. The aircraft is currently on display at the Niagara Museum of Flight, near where it was built.
View attachment 834146
Oh dear! The famous pic of the zombie groundhog crawling out of its watery grave to start the infamous thread again!
 
The Japanese had researched and tested these aircraft thoroughly and were very curious about the front wheel shock absorbers that they copied. The overall Japanese rating of the Douglas DB-7B(C) was not very good. It was found to have poor performance, low maneuverability, poor defensive armament and payload (the DB-7C payload was 900 kg, and the basic Japanese bombers at that time were 1000 kg for the Ki-49 and 1000 kg for the G4M). WART
Don't have to be awesome if there is a multitude. An oppressive crush of mediocrity followed by a multitude of good designs is obviously a winning strategy.
 
In 2004 P-39Q serial number 44-2911 was found in Lake Mart-Yavr, above the Arctic Circle in Siberia. The Airacobra had suffered an engine failure and crashed into the lake on November 1944. The remains of pilot Lt. Ivan Baranovsky were still inside. The aircraft is currently on display at the Niagara Museum of Flight, near where it was built.
View attachment 834146
The pilot:

Lieutenant_Ivan_Baranovsky_P39_0911_15_GALL.jpg


 
The pilot:

View attachment 834166

Rest in peace, pilot Baranovsky.
 
The Combined Fleet at the Yokosuka Naval Review, October 11, 1940 IJN Tone, Settsu, Mizuho, and Isuzu. Front of Isuzu is I-168. Ships in background are Mamiya and Akashi REDD
The Combined Fleet at the Yokosuka Naval Review, October 11, 1940 IJN Tone, Settsu, Mizuho, an...png
 

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