....not hard to see upwards of 50nm OEI to get to 1500ft.
Hmmm, seems 'tis similar to an 'ole B707-320 straight-pipe type, at max weight with a failed outboard engine.
Folks would never believe it if they hadn't flown one, and noticed it personally.
Even with all four turning, 400 ft/min at V2+10 after an 11,500 foot ground run was not uncommon, for a takeoff at max weight...317,000 pounds.
Of course, this was a CAR4b type, so not much margin left for performance.