I'm guessing at +2.5 (limit was +3.25 ish from (dim) memory) at the bottom and initiation, with a tad over 1 at the top (although the C-130 is stressed for a smidge of negative...again -0.75 I think).
Loop is perfectly achievable within airframe limits, assuming aircraft was within Vno1 table..which it would be when empty of freight....
We used to use a bit of <1g when trying to get the cargo door locked up in preparation for wedge loads (and the UK C-130s only had a single hydraulic jack on that door).......as many will remember......and is the source of my username....
Last edited by bunta130; 18th Jul 2018 at 20:13.