Thanks for this info, my friend @tcinla!
Wish I knew before...
...because here is my 1/32 Matchbox (Revell rebox) Dauntless...
(grossly simplified and inaccurate and turning out to have been finished with the - wrong - bluegray - upper shade - should be gray, but Revell instructions and a wrongly edited photo...
...took a toll on Yours Truly color decision...) 🙂
OF COURSE I modeled all dive brakes open! However, the presence of the pilots might have saved my day: they were checking the dive brakes operation with engine running? 🙂 @inflames