Re: Pulling a Stop to Runway Overruns
HS,
You are likely correct wrt the direct pitching moment from the spoilers on these 2 types, although there may be some subtraction as a result of lift dumping.
As far as the pitching moment from reverse is concerned, reverse from engines mounted below the wings will generate a nose-down pitching moment. The corollary is that forward thrust from engines in this position produce a nose-up pitching moment. Reverse from an engine mounted higher up can be a different matter.