Never seen an aircraft return on wx radar.
Radar works a treat, flying 212, 412, 76 could paint the guy in front (rear aspect) at twenty miles, used it for ensuring separation on crap days if going the same direction, also ensuring separation if the other was crossing traffic, ours was a cough, cough, VFR operation.
What do we think of flight helmets for pilots in single pilot
Necessity irrespective of the number of pilots, in a 412 event the aircraft developed a severe vertical, pilots had helmets but both their heads went through the overhead windows above even though they were tightly strapped in, vertical was such that engines tore loose from bearers. Then you can have that cooling fan atop your head make an entrance into the cockpit. Some offshore chaps wear them. One 76 accident had the aircraft impact in a left wing down and the chap in the right seat hit his head on the broom closet. He exited and helped rescuers extract the trapped copilot, 45 minutes after the crash he collapsed and died, result of head impact on broom closet.