Noun
hwk (uncountable)
Abbreviation of homework.
The Me 163A V4 was shipped to Peenemünde to receive the HWK RII-203 engine in May 1941. Source: Internet
It was as complete an operational machine as possible with the Walter HWK 109-509 A1 motor installed for the first time. Source: Internet
These HWK 109–509B and C motors would improve endurance by as much as 50%. Source: Internet