Originally Posted by topendtorque
Tap test.
No - re the daily, it is required at the 100 only on the R22, section 2.410 para 13 [refers 9.130 (h)] , yes – re the bond joints and very much yes re the extreme care - with the coin, - according to the genuine maintenance manual a 1965 US quarter- no less, please don’t tell the insurance company!
R44’s - still very prone to the trailing edge debond prob, I hear, – there was a god awful bit of jungle talk recently about a dude who – a) found one – b) got up it with the metal set – c) flew it for a few days – d) upon his return to base his chiefy told him to stick it, (and all) when he was asked to pretty it up!
BTW – shouldn’t the nose bump be the international dit-dah-dit, not dah-dit-dit? Not trying to be the bastard – like!
The reason for the 1965 or later coin is that pre-1965 all U.S. quarters were made of silver. Post 1964 they were only silver-coated.
I suppose the "tap" would be different for the silver versus silver-coated coins.