I've been instrument rated on plankers for nearly 2 decades.
Pre-rating the life saving 180 manoeuvre did the job for me at least once.
Post-rating I have more than once launched with cast-iron advertised VMC and found myself seeking a popup IFR clearance as a way out. Nothing stupid or negligent, just unforecast weather developing in front AND behind very fast while a considerable distance from a landing spot.
I'd say a level of training that gets the aircraft reversed is precious. Sometimes IMC in front is clearly defined and sometimes it isn't. It can even drop suddenly from above (e.g. RA/SN/TS). If training can also get you down under control and safely in someone's field then the value is huge.
Even if you are only good for a minute or two of instrument flying (= enough to get out) this has GOT to be better than loss of control.
Most FW pilots untrained on instruments also lose control shortly after entering IMC. Agree R22 is utterly unsuitable for IFR. Bet you can keep one upright with proper instrumentation and training though, after all the aircraft does not know it is in the murk.
Given a choice between a fix for mast bumping and an attidude indicator I'd take the latter. Hope you aren't reading this Lu.
Chips
ps I know you can lose forward speed in a helicopter in a way you can't in a FW, so don't remind me.
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More volts, Igor