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?"

 

[Jemiba]

Not much of a riddle, I'm afraid. The first prototype, the Junkers G38a (D-2000) actually differed considerably
from the other ones, especially with regards to engine types in the inner nacelles ( Junkers L 88a, 775 hp)
and in the outer ones (Junkers L 8a, 325 hp).
Later aircraft got four Junkers L88, 800 hp, Diesel engines.
Sources for that are Wolfgang Wagner "Hugo Junkers, Pionier der Luftfahrt" and Waffenarsenal volume 80, "Die
Grossen Dessauer"

 

[xylstra]

Not much of a riddle, I'm afraid. The first prototype, the Junkers G38a (D-2000) actually differed considerably
from the other ones, especially with regards to engine types in the inner nacelles ( Junkers L 88a, 775 hp)
and in the outer ones (Junkers L 8a, 325 hp).
Later aircraft got four Junkers L88, 800 hp, Diesel engines.
Sources for that are Wolfgang Wagner "Hugo Junkers, Pionier der Luftfahrt" and Waffenarsenal volume 80, "Die
Grossen Dessauer"

A mystery no more!