to help carry those huge flying fortresses into the air. Jet propulsion has not been implemented yet.
Not many photos were saved from that time, because of the high secrecy levels of such projects and because a lot of time had passed already. Still, on the photo above you can see one of such planes -a heavy K.7 bomber .
"The Heavy K-7 was quite impressive in it's size. The wings were plywood and cloth to reduce weight. The Germans also had a version of the K-7." Thank you William for post.
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