I am following someone on Youtube who has built a rocket shaped (4 proprllers) drone for the world speed record ...
He was having problems with internal heat from electical control gear and battery inside the sealed rocket (about 1kw waste heat)
Speed is 500km/hr , I suggested a 4mm hole in the tip of the nose and 8mm hole at rear which should alow sufficient air cooling ..
I said this will increase thrust because the air exiting is hotter .. a bit similar to a ram jet ... was I correct...
i want to just test a linear generator with galvanometer , the magnet is N28 and the wire (Cu) is of 0.6mm thikness and 10m long , but galvanometer dont show anthing ,
The core is PLA material (3d printed)
The magnet size if 28mm * 10mm * 5mm