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So if there are two jets performing a formation takeoff, but the lead's got a V1 abort, how do you notify the other pilot? What about in instrument conditions?
Thanks!
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A couple of ways. First, during a form takeoff, the centerline is briefed as a "brick wall", that is, each aircraft takes it's half of the runway on lineup, and stays there. That way, if lead aborts, there's not a collision problem. Second, it's also briefed that during takeoff, the wingman knows what to expect. For example, there's no need for the wingman to note his 1000' or 2000' check speed on takeoff roll, since lead is checking that and if the wingman is keeping up with lead, and lead made the check speed, so did the wingman. Second, if at any time during the takeoff roll, wingman sees rapid aft line of sight by lead.....that is, lead rapidly decelerates, it's briefed to assume that lead aborted, and wingman now makes his own single-ship takeoff. Again, any abort is pretty much obvious in the sense that a radio call needn't be made, since these contingencies are pre-briefed, and each flight member knows what the other is doing at pretty much all times. He may not know why the abort was made, only that it was made, and he exercises the briefed contingency for that. Formation flying, as well as takeoffs and landings, are a highly briefed event, leaving no room for question marks in any of the minds of the flight members, simply due to the dangerous nature of operating two aircraft so close together.
Word of caution, I DO NOT reccomend pilots that HAVEN'T been trained in formation flight to undertake this endeavor; it's VERY risky. There are specific items/procedures that those undertaking form flying, especially takeoffs and landings, MUST understand, both from a lead and wing perspective. These items MUST be briefed and clear prior to stepping to the aircraft.
Items such as when taking the runway for departure, where does the leader place the wingman and why? What procedures should be followed in the event of lead/wing needing to abort prior to, or during, takeoff roll? What formation references does the wingman use to remain in position? Why is the runway centerline considered a "brick wall" and what happens if either aircraft violates said wall? For form flying: What are lead/wing responsibilities for effecting rejoins? What are the clues for detecting an overshoot? What are the procedures for performing an overshoot?
All that being said, with the proper training, formation flying can be fun and interesting; but I'll never fly formation with someone without the training (unless, of course, I'm instructing them in it). I do get somewhat leery reading AIM Section 7-5-9 covering Emergency Airborne Inspection of Other Aircraft. Again, a VERY risky maneuver. Some of you may remember the death of Senator John Heinz. He was riding in a Piper Aerostar that had an unsafe gear indication. A Bell 412 helo rejoined on the Aerostar, per the Aerostar pilot's request to check out the hear. The two aircraft ended up having a mid-air. Both crews were untrained in formation ops, and it bit them hard. There's very few situations where civilian aircraft HAVE to fly formation, and a word of caution, if any accident/incident arises from formation flight, especially with an untrained crew, the FAA will have a field day invoking 14 CFR 91.13, Careless and Reckless Operation.