View source for Personnel Flying

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This page has been archived as it documents a practice which has fallen into disuse.
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{{Hazardous}}
This article deals with the often complex issue of personnel suspension for theatrical purposes; its scope covers supporting performers on flying scenery and in harnesses. Due to the nature of these effects, much of this will be weighty safety-related discussion.

Needless to say, if you're reading this then you probably want to carry out personnel flying at the [[ADC Theatre]], as it's quite likely the only venue in Cambridge where this can be done by students. Speak to the Technical Manager in plenty of good time (months+) before you go any further.

== Introduction ==

Personnel suspension can be extremely dangerous if not done correctly and any flying effect should be carefully thought out. Case studies below describe effects that worked for a specific show, in a specific venue, with specific people involved. Your show should always come up with its own detailed method statement and risk assessment which should take into account the specifics of the venue, the equipment available at the time and the skill, experience & competence of the cast/crew involved in the effect. '''Do not''' simply copy and paste previous documentation with no thought or understanding.

Due to the open, user-sourced nature of this wiki, contributors to this and related articles cannot accept any liability for the consequences of people interpreting and applying the information below. Use at your own risk.

== Literature and standards ==

Two important references that you'll want to review are:
* Technical Standards for Places of Entertainment ("Yellow Book"), published by the District Surveyors' Association and ABTT. This provides recommended ratings for flying equipment.
* BS 7905-1, published by the British Standards Institute. This details minimum standards for suspension equipment in places of entertainment, and Part 9 of the standard deals specifically with performer suspension.

Being a legal deposit collection, the University Library gives free online access to almost all British standards (see https://libguides.cam.ac.uk/britishstandards/access) while the ADC Theatre has copies of the Yellow Book.

The trickiest point in BS7905-1 is the fact that equipment for performer suspension must have a safe working load of at least twice the expected load in use; you may find that (for example) stock rigging fittings in the ADC are inadequate for all but the wispiest of actors. When suspended, live people tend to move which creates dynamic loads; a 70kg actor may create peak loads on the system of much more than this.

Note that these standards are not the same as a legal requirement; Cambridge shows in bygone days have knowingly not complied with certain aspects of the standard due to technical or artistic limitations, following thorough assessment of the risks of non-compliance. Just be aware that if you violate (for example) BS7905-1 and someone does end up getting hurt, you may have to justify why you felt it was appropriate to disregard industry standards to a judge or coroner.

== Equipment ==

All equipment used for flying generally should have its manufacturer's name, CE/UKCA mark, SWL/MBS and standards compliance stamped/printed on it. This is even more important for lifting equipment and accessories used for personnel flying. You also need to know the provenance of your equipment; textile and fabric equipment is generally not considered to last longer that 7 years from the date of manufacture, unless the manufacturer's instructions say otherwise.

If you are doing your effect in the ADC Theatre, you may be able to make use of a set of four large flying wires (3.6m x 6mm diameter) which have a SWL of over 235kg (two galvanized steel wires) and 216kg (two black coated wires) with a 10:1 factor of safety. There are also a pair of bar hangers rated to 550kg with a minimum 3:1 FoS. Custom flying wires and attachment can be purchased at very reasonable rates (the wires described above were about a tenner each) from ropeassemblies.co.uk. Flying wires for personnel suspension should never be wrapped around stanchions, as this derates the wire, but should be attached using bar hangers. Kinked or twisted flying wires should be retired immediately.

When planning your effect, make a comprehensive list of every bit of lifting equipment in use for your effect - from the counterweight bar and harness to shackles and fabric slings - including safe working loads and minimum breaking strain, and write it all down. Ensure that all equipment is either under warranty or has been inspected by a certified lifting inspector. If you have ropes or wires passing over pulleys, fairleads or being loaded in a bridle, be sure to account of the increased load on the wire.

For harness suspensions, a fall arrest or work positioning harness may be appropriate. For longer suspensions, the risk of suspension trauma may require the use of a specialist flying harness. This will be very dependent on your specific effect, so have a think ahead of time in case you need more budget for a harness. For scenery flown with actors on it, the scenery should be of sound construction and if it has been custom-made, should in most cases be subjected to a non-destructive load test.

Be aware of that the counterweight systems installed at the ADC predate the modern practice of providing loading diagrams for technicians at the venue. It is unclear exactly what the SWL limitations on the counterweight bars are in terms of single point loads versus loads distributed across the entire length of the bar. Also note that there are at least three different generations of counterweight equipment in the building, as the counterweight sets were installed progressively over a number of years.

== The weight issue ==

If you're using a counterweighted line set to suspend an actor, bear in mind that when they're not putting their weight on the system there should be an equivalent weight put on instead, to prevent the bar going out-of-weight. The ADC Theatre has concrete weights (67kg and 76kg) for this purpose; again, any custom weight should be tested to ensure it's not going to fall apart if it takes a shock load.

If the actor does not need to be flown in or out whilst attached to the system, then the weight can remain permanently attached, and will prevent the actor from being accidentally flown out because the system will become rapidly bar-heavy if the operator attempts to fly it out.

If the actor does need to be flown, then the additional weight will have to be removed after the actor is attached. This process must be reversed before the actor is removed from the system, and if the actor is removed by other cast members on stage as part of the action, this is harder to get right safely. The cast must not remove the flown actor until the weight has been re-attached and so an appropriate signal must be given to the cast when it is safe to remove the flown actor. If a direct line-of-sight visual signal is not possible, another method is to use cue lights controlled by the Deputy Stage Manager concealed in the set out of sight of the audience.

== The rescue plan ==

You will need to come up with a plan (or multiple plans) to rescue the actor in the event of calamity, for example:
# The counterweight system jams and the actor is 'stuck' flown out,
# The actor gets into difficulty or otherwise starts to panic,
# The actor is inadvertently injured when flown into something,
# There is a fire,
# The actor becomes unconscious.

The final point can often be the most tricky; releasing an inert unconscious persons from a set of loaded flying wires to which they are attached is difficult. Previous rescue plans have involved the use of the Genie being on standby to drive out onto stage to collect the flown person in the basket with the operator, before being lowered down using the emergency lowering valve on the back at ground level. This is obviously dependent on the Genie being available, tested, operational and your set being constructed in such a way that allows for the Genie to drive straight onto stage.

If the Genie is not considered suitable for rescue then an alternative plan must be devised. Such a system could be 'rigged for rescue' - designed in such a way that the system to which the performer is attached is itself capable of being lowered down. Double (for redundancy) semi-static rope systems running through friction-based descent control/rope adjustment devices can be employed so that the ropes may be released in a controlled manner during an emergency. Note that some of the old sods are experienced in rope access and rescue techniques so may be of use here.

Of course if your flying effect is only a few feet of the ground/deck, then technicians up A-frame ladders ''might'' be a suitable rescue plan.

== Suspension intolerance ==

For harness suspensions, it's important to minimise the time the actor spends in the harness to reduce the risk of suspension intolerance. Put simply, the human body is not designed to hang inertly in a harness for prolonged periods. If it does, blood will tend to pool and clot in the veinous cavities in the legs, starving the rest of the body and inducing a potentially life-threatening condition. See the Wikipedia pages on [https://en.wikipedia.org/wiki/Suspension_trauma suspension trauma] and [https://en.wikipedia.org/wiki/Syncope_(medicine) syncope].

If the actor is flown out of audience view, they should tense and release the muscles in their legs. This helps to promote good blood flow and mitigate the effects of suspension intolerance.

== Designing the effect ==

Artistically, the most awkward parts of a flying effect are putting the actor in and out of the system, and preventing them from spinning around in mid-air. Liaise with the rest of your production team; you may be able to cover the transition in and out of the system with a flown cloth, cunning lighting or action elsewhere onstage. Spinning is most easily mitigated if the actor is flown into position behind a cloth, so that they can stabilise themselves before being revealed. Other solutions include providing them with an inconspicuous solid object to brace against, or using two flying wires in a bridle, or you may come up with a different solution entirely! Flying the actor slowly and steadily is also a good way to prevent "unexpected movements".

== Flying by Foy ==

These days, serious consideration must be given to outsourcing all personnel flying to Foy, rather than attempting to do it in-house. They are industry-leading experts on performer flying effects and are undoubtedly much more experienced and well-equipped than anyone reading or writing this page. Their website is at http://flybyfoy.com.

== Case Studies ==
=== Angels in America - Part One: Millennium Approaches (February 2013) ===

The brief for this effect was to have the titular Angel appear above the main character's bed in the final scene and deliver two lines of dialogue before blackout; the actor playing the Angel was doubling a role in the previous scene, so the ease of donning her costume, and concealing the harness under other costumes, was critical. The playwright's notes specify that the audience can "see the wires", so for redundancy and to prevent the Angel spinning in mid-air, the production team used a pair of bridled flying wires.

The transition into and out of the system was masked by a cyc which was flown out once the actor was at height and flown back in after the blackout, which allowed plenty of wiggle room to adjust the actor's position, check they were comfortable and dampen any swaying motion. As the actor only ever flew out a short way, a retaining wire was used on the concrete balance weight so that she couldn't be taken out too high due to operator error. The harness used was a Petzl Navaho fall arrest harness, which is quite bulky so the costume had to be designed around it. It was however comfortable enough for the actor to emote and deliver lines while in suspension.

=== PARADE (June 2013) ===

In the climactic scene, the central character is led onstage onto a stool, a noose is placed around his neck and the stool pulled away so that the character is lynched. The audience must believe that the noose and actor are suspended from a large tree branch that is part of the set, and the actual flying wire must not be seen. To achieve this effect, the actor's weight is supported by a harness and counterweight lineset, the flying wire is disguised among tree branches and a trick noose is used.

Here, the main safety risk was not from the flying (the actor was at most 3ft off the floor) but from the danger of him falling into the noose. The trick noose had three key safety features:

* Only one "end" of a noose will tighten when pulled; the noose was tied so that the long end was the non-tightening end, and the short end was sufficiently short that it couldn't get caught on anything. This produced a visually convincing noose that wouldn't tighten
* The loop was cut near the knot, the cut ends were strengthened with whipping twine and rejoined using a couple of loops of cotton thread. This meant that if significant force was applied to the loop, it would break open. Some trial and error was required to establish how weak the link could be without it falling apart when the actors were handling it.
* The long end of the rope wasn't tied off but was lightly held taut offstage, so even if the weak link failed, the noose would simply slide down rather than taking any load.

The flying wire was flown in under cover of darkness during a dimly-lit scene on a different part of the stage. At the same time, an actor placed the noose over the tree branch. The noose and flying wire were held together by the actor duing the scene until they were needed, so the noose hid the bottom half of the flying wire. The top half of the
wire was disguised by taping some leaves to it so that it looked like part of the tree, and ensuring that a number of other small twigs came off the branch in the same area as the flying wire, which broke up the straight vertical line that the wire appeared as to the audience. 

To disguise the harness being clipped on, the scene was blocked so that there were several actors putting the noose and a blindfold on the "victim". The "victim" then bent his knees slightly to put his weight on the wire before the stool is kicked away. When the actor "dropped", the stretch in the wire meant that the noose needed to be loose, so that he didn't snap the weak link. The actor was allowed to spin slightly, but was prevented from turning right round and revealing the effect by kicking off from the deck behind him. The lighting went to a blackout within a couple of seconds of the effect, and so we relied on the audience being so shocked from the effect itself that they would not notice the actor using the deck to stop himself spinning. The actor was then lifted up, the noose removed, and unclipped in blackout.

=== How to Succeed in Business Without Really Trying (March 2017) ===

A perform flying effect is called for at the start of the show where the titular character is suspended in a window cleaner's basket. A basket structure was constructed using scaff and attached to counterweights using steels. The railing were considered secure enough that the performer did not need to wear a harness.

=== The Hunchback of Notre Dame (Panto 2017) ===

In one scene, the panto dame was flown in dressed as a church bell. The elaborate costume was used to disguise the flying harness which was attached to two flying wires using Kong Frogs. Frogs were used as they were quick and easy for two other actors to release once the actor was flown in. There was a birdie in the PS perch that was switched from the SM desk and which was used to signal when the deadweight was attached so the actors knew it was safe to disconnect from the harness.

=== Angels in America - Part One: Millennium Approaches (February 2019) ===

No in-depth description of this case study is available, but an actor was flown in the manner called for in the script.