I've already covered the He-162 before, but recap: It was designed in under 30days and flew within 37 days as an emergency "People's Fighter." Made of largely non-strategic wood with a single BMW 003 jet engine of 1760 lb st and featured an ejection seat. Carried 2x 20mm MG-151/20s, but sometimes 2x 30mm MK-108s in ventral position with 100-120 rds per gun. Was fast at 560 mph and had a ceiling of almost 40,000 ft with 4200 fpm climb and range of 434 miles. Was intended as second fighter after Me-262, but more like a point defense interceptor. Against impossible odds, 300 of these a/c were built with 900 more on the lines from Oct '44-April '45. JG 1 at Leck became operational in April 1945 for three weeks with 50+ a/c, but only 23 serviceable and almost no gas to fly! The He-162 killed 4 Allied aircraft in combat nonetheless with no losses. Early He-162s that tested were lost to accidents and problems with bonding (glue). Some reviews mark this as a bad aircraft and yet others consider it a success that was overcome by events. The fact that it got built and became operational under total bombardment and in so short a time is remarkable. In numbers, with improvements, it could have been very formidable... at least until the Fw Ta 183 and Go-229 arrived ;-)

* In reality a myth. HJ trained for a wide number of a/c schemes such as the He-162, Bv-40, and Reichenberg R.IV suicide jet... but the latter 2 were cancelled and the He-162 was flown by LW pilots with experience.
** Early models experienced vibration when the 30mm guns were fired, so 20mm guns were substituted and there was structural refinement in that area