JUNKERS G.38 pre-WW2 mini-mystery.....

[xylstra]

Anyone solve the mystery?? Why, oh why did the JUNKERS G.38 4-engined prototype test-fly with a four-bladed propeller, inboard and a two-bladed propeller, outboard on each wing? All four driving engines were identical. Might this have caused any power imbalance/handling or thrust deficit issues? What was the direction of propeller rotation? Was anything useful learnt from this?
It - and its sibling - were all ultimately equipped with four-bladed propellers on all four engines. "Strange, eh?"

 

[fubar57]

Might have had something to do with the prototype engines. According to the book, "Junkers: Company Profile 1895 to 1969" the outer engines driving the two blade props were Junkers L8 400hp engines and inboard engines were Junkers L88 800hp engines

 

[xylstra]

Might have had something to do with the prototype engines. According to the book, "Junkers: Company Profile 1895 to 1969" the outer engines driving the two blade props were Junkers L8 400hp engines and inboard engines were Junkers L88 800hp engines

That would indeed, explain it. A case, I think, of a "picture missing a thousand words!"

 

[GrauGeist]

The Japanese installed Jumo204s in their version, the KI-20, because they deemed it underpowered.

 

[Crimea_River]

The two bladed props in the picture rotated opposite to the 4 bladers.

 

[fubar57]

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