I hadnt thought of it before but the question dawned on me hit me. i wonder why they went with that wing design instead of the swept wing? the 163 and 262 had swept wings which dealt with compressability better. if it was to be a small fast attack aircraft wouldnt you want the same characteristic?? i am sure there is a logical reason...just perplexed me. its max speed i saw listed was 562 mph so it would have a decent chance ( if all the bugs were worked out and it flew ) to go well over 600 in a dive.
While its true that swept wings dealt with compressibility well, this was not the reason either 262 or 163 had them, it was purely for other aerodynamic reasons, cg on the 262, stability and control on the 163, therefore the Germans were only just coming round to using swept wings for high speed (P.1101, Ta 183 - both unflown in 1945) so its not that strange that the 162 had straight wings. the shorter straight wing is also lighter.