[pirate22]

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Situation WE Vuln OPPs non Vuln.........
Your pard North opens 2cl normal-east now bids 2 spades

thght many things settled on 3 diamonds,but considered a x
pass-pard now 4hts---pass {2sp bidder}
your bid now????????????????????

5cl/5n/t-- 6hts/pass........
Mr Hog not reqd to input ty

[Zelandakh]

Partner has shown self-supporting hearts so being a Philistine with Old Black should get you to the right level. Incidentally your initial double of 2S would be considered as a negative in most circles.

[matmat]

LOL

[semeai]

My first thought is just to bid 6NT. Hard to ever know well enough whether hearts or diamonds are running to ever bid a grand. Hearts could be ♥AKQ10xxx or so.

If you still want to try for the grand:

I'd play that 4H shows a solid suit, i.e. no losers opposite a singleton excepting maybe the Ace. Hence I wonder: assuming 4NT is keycard, is then the queen ask is understood as "does your suit have no losers, even opposite a void" instead of a queen ask? 5NT should similarly check on trump quality as some modified form of grand slam force which maybe checks whether there are no losers opposite a void, but it's also barely possible partner doesn't have the two side aces.

[pirate22]

The juices are flowing :) a few more answers, and i will reveal all,

Regards