I never understood the point of spam recon. The USSR has plenty of fighters, what's this supposed to do? I always set the percentage to intercept fairly low so I don't think there's a fatigue effect. And you are exposing your precious German fighters to getting shot down by random AAA if not by the I-16's and I-153's.
On its own it is counter productive - it just gives wins to the other side at best. In combination it can be the tipping point. Fighters are most effective at their point of least fatigue. The effect is quite dramatic for the first added fatigue. Recon can give that before you have the fighter sweeps, bombings etc. So your fighters have easier opposition. Secondly you could (and to some extent still can) concentrate it on only one fighter group. Typically this is longer range fighters like P-40Bs or MiGG-3s. You can concentrate all the recon in areas you know only that fighter will intercept as others are too short range. Typically fighter groups do get operational damage and losses from any operation. If you know your opponent's percentage required to fly is say 50% and their fighter groups have a maximum of twenty, then any fighter group with say 11 fighters only has to lose two to have the whole air group stop flying. So spam recon can be disproportionately effective when you have airgroups whose complement is only a little above the number it needs to fly. They will lose one or two aircraft to damage say which is not that important. But the key point is the rest of the fighter group, who may be many more, will then not fly for the whole of the rest of the turn.
Personally I just see it as an auxiliary effect. There is lots that recon can do. Not just seeing where enemy units are but seeing where enemy fighters do or do not intercept, working out your opponents air doctrine, improving the chances of interdiction during your opponents turn, raising detection levels to improve bombing or for multi-turn tracking etc. The spam recon effect is just a natural by-product of this if you do the recon first. IMHO most Axis players use recon too little, especially given how much they have of it.
< Message edited by Telemecus -- 6/20/2018 2:09:20 PM >