snowflake [none/use name]@hexbear.net to Worldbuilding@hexbear.netEnglish · 21 days agoHow could a noiseless flying machine be built in the far future? (Or one with a pleasing hum instead of sounding like a drone or helicopter?)www.youtube.comexternal-linkmessage-square11fedilinkarrow-up111arrow-down10
arrow-up111arrow-down1external-linkHow could a noiseless flying machine be built in the far future? (Or one with a pleasing hum instead of sounding like a drone or helicopter?)www.youtube.comsnowflake [none/use name]@hexbear.net to Worldbuilding@hexbear.netEnglish · 21 days agomessage-square11fedilink
minus-squareCoolerOpposide [none/use name]@hexbear.netlinkfedilinkEnglisharrow-up3·21 days agoLower density than air balloon
Lower density than air balloon