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#1
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It hasn't happened yet, but we are going to kill or maim the flagman if we don't change our ways. It's just a matter of time.
This has become my personal pet peeve. Over the years, I have personally observed a lot of gliders drop a wing and veer off the runway. And admittedly a number of times my observation was from the driver's seat. My own launching technique is better now so my odds of staying on the runway are not as bad as they used to be. Yet, I know it can happen again. It can happen to anyone. The matter of how to avoid wing drop is not what this writing is about. That's for another thread. This is about the fact that it does happen. This thread is about a potentially serious consequence when it does. Having a serious veer off the runway is an uncommon event for sure. It's one of those things where all goes well so often that it's easy to be neglectful of the low probability yet high consequence risk scenario that plays out at every contest launch. We were all trained that there should be a safety cone in front of the glider when we launch. That being a zone in which there are no people or objects that have the potential to convert an embarrassing non-event into a small or large catastrophe. At US contests this important need for a safety cone is routinely overlooked. The flagman stands and does his work in a dangerous location in front of the launch. Our contest flagmen are volunteers. I, for one, am very appreciative of all of the contest volunteers. Without the dedicated work of the volunteers, contests wouldn't happen. Certainly, there is a high obligation to not put volunteers at risk. The manner by which a glider can come off the runway varies dramatically. Often, the affected pilot is faced with a real dilemma that plays out in a matter of seconds. A wing is low, perhaps dragging on the runway. He believes he can lift the down wing if he simply persists a bit and waits for airspeed to come up. In the mean time he's beginning to veer. If he releases early, the matter is low energy and low consequence. If he holds on for a little longer, he thinks he can raise the wing yet his speed is increasing and the potential for adverse consequences increase perhaps with the square of velocity. Should the pilot fail to get to the release quickly enough and the wing stays low, the resulting veer will be high energy. The veer off the runway can occur at speeds that can do real damage. I've seen it happen. In my, thus far, unsuccessful efforts to change contest practice in this regard, I've spoken to several different contest operations managers and I've also spoken to flagmen about the issue. I'm routinely pooh-poohed. The flagman will tell me that he can run out of the way if a wing is coming at him. One flagman told me that he can jump over the wing if he needs to. But wait a minute... what if the wing that is coming at him is coming at 30 or 40 MPH? What if it happens to be the high wing that is coming at him or the fuselage? What I observe at contests is that wing drops are sufficiently rare that the flagman always becomes complacent (assuming he or she is aware of the hazard in the first place). As the towplane and glider roar by, he'll be sipping from his water bottle while maybe sauntering a few step out of the way. If it were the case that our flagmen were selected for sprinting ability and if their practice was to swing the flag then immediately begin sprinting for the sidelines then perhaps the present hazard wouldn't be. Yet, that is never what happens. Requiring a sprint from the flagman at every launch would be an unreasonable expectation for sure. At any rate, few would have the endurance strength and athleticism to do 30 to 50 successive 25 yard sprints in launch time summer heat. It isn't as if there is no alternative to using a flagman for launch control. There is an alternative that works extremely well and puts no one at risk in the safety cone. The launch controller stands aside the sailplane with a handheld radio as the glider is being hooked up and readied for launch.. The launch controller gives particular radio commands to take up slack and then a particular distinctive word sequence command to commence the launch. Barb Smith, who's served as operations manager at a few Parowan contests in recent years, seems to have pioneered this method. This is really a very good scheme. There is no double communication required. The launch controller is in a position to easily observe the towline slack and also very well observe the readiness of the wing runner, the glider and the glider pilot too. I urge that we adopt the radio method of launch control at US contests. Let's not wait until we've killed the flagman. |
#2
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I am staggered that it's still felt necessary to use a flagman/forward
signaller when use of radio is so ubiquitous and the norm almost everywhere else? At 21:04 29 June 2014, Steve Koerner wrote: It hasn't happened yet, but we are going to kill or maim the flagman if we = don't change our ways. It's just a matter of time. =20 This has become my personal pet peeve. Over the years, I have personally o= bserved a lot of gliders drop a wing and veer off the runway. And admitted= ly a number of times my observation was from the driver's seat. My own la= unching technique is better now so my odds of staying on the runway are not= as bad as they used to be. Yet, I know it can happen again. It can happe= n to anyone. =20 The matter of how to avoid wing drop is not what this writing is about. Th= at's for another thread. This is about the fact that it does happen. This= thread is about a potentially serious consequence when it does. Having a = serious veer off the runway is an uncommon event for sure. It's one of tho= se things where all goes well so often that it's easy to be neglectful of t= he low probability yet high consequence risk scenario that plays out at eve= ry contest launch. =20 We were all trained that there should be a safety cone in front of the glid= er when we launch. That being a zone in which there are no people or objec= ts that have the potential to convert an embarrassing non-event into a smal= l or large catastrophe. At US contests this important need for a safety c= one is routinely overlooked. The flagman stands and does his work in a dan= gerous location in front of the launch. Our contest flagmen are volunteers. I, for one, am very appreciative of al= l of the contest volunteers. Without the dedicated work of the volunteers,= contests wouldn't happen. Certainly, there is a high obligation to not pu= t volunteers at risk. The manner by which a glider can come off the runway varies dramatically. = Often, the affected pilot is faced with a real dilemma that plays out in a = matter of seconds. A wing is low, perhaps dragging on the runway. He beli= eves he can lift the down wing if he simply persists a bit and waits for ai= rspeed to come up. In the mean time he's beginning to veer. If he releas= es early, the matter is low energy and low consequence. If he holds on for= a little longer, he thinks he can raise the wing yet his speed is increasi= ng and the potential for adverse consequences increase perhaps with the squ= are of velocity. Should the pilot fail to get to the release quickly enoug= h and the wing stays low, the resulting veer will be high energy. The vee= r off the runway can occur at speeds that can do real damage. I've seen it= happen. In my, thus far, unsuccessful efforts to change contest practice in this re= gard, I've spoken to several different contest operations managers and I've= also spoken to flagmen about the issue. I'm routinely pooh-poohed. The f= lagman will tell me that he can run out of the way if a wing is coming at h= im. One flagman told me that he can jump over the wing if he needs to. B= ut wait a minute... what if the wing that is coming at him is coming at 30 = or 40 MPH? What if it happens to be the high wing that is coming at him or= the fuselage? What I observe at contests is that wing drops are sufficiently rare that th= e flagman always becomes complacent (assuming he or she is aware of the haz= ard in the first place). As the towplane and glider roar by, he'll be sipp= ing from his water bottle while maybe sauntering a few step out of the way.= =20 If it were the case that our flagmen were selected for sprinting ability an= d if their practice was to swing the flag then immediately begin sprinting = for the sidelines then perhaps the present hazard wouldn't be. Yet, that i= s never what happens. Requiring a sprint from the flagman at every launch = would be an unreasonable expectation for sure. At any rate, few would have= the endurance strength and athleticism to do 30 to 50 successive 25 yard s= prints in launch time summer heat.=20 It isn't as if there is no alternative to using a flagman for launch contro= l. There is an alternative that works extremely well and puts no one at ri= sk in the safety cone. The launch controller stands aside the sailplane wi= th a handheld radio as the glider is being hooked up and readied for launch= .. The launch controller gives particular radio commands to take up slack a= nd then a particular distinctive word sequence command to commence the laun= ch. Barb Smith, who's served as operations manager at a few Parowan conte= sts in recent years, seems to have pioneered this method. This is really = a very good scheme. There is no double communication required. The launch= controller is in a position to easily observe the towline slack and also v= ery well observe the readiness of the wing runner, the glider and the glide= r pilot too. =20 I urge that we adopt the radio method of launch control at US contests. Le= t's not wait until we've killed the flagman. |
#3
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On Sunday, June 29, 2014 5:04:30 PM UTC-4, Steve Koerner wrote:
It hasn't happened yet, but we are going to kill or maim the flagman if we don't change our ways. It's just a matter of time. This has become my personal pet peeve. Over the years, I have personally observed a lot of gliders drop a wing and veer off the runway. And admittedly a number of times my observation was from the driver's seat. My own launching technique is better now so my odds of staying on the runway are not as bad as they used to be. Yet, I know it can happen again. It can happen to anyone. The matter of how to avoid wing drop is not what this writing is about. That's for another thread. This is about the fact that it does happen. This thread is about a potentially serious consequence when it does. Having a serious veer off the runway is an uncommon event for sure. It's one of those things where all goes well so often that it's easy to be neglectful of the low probability yet high consequence risk scenario that plays out at every contest launch. We were all trained that there should be a safety cone in front of the glider when we launch. That being a zone in which there are no people or objects that have the potential to convert an embarrassing non-event into a small or large catastrophe. At US contests this important need for a safety cone is routinely overlooked. The flagman stands and does his work in a dangerous location in front of the launch. Our contest flagmen are volunteers. I, for one, am very appreciative of all of the contest volunteers. Without the dedicated work of the volunteers, contests wouldn't happen. Certainly, there is a high obligation to not put volunteers at risk. The manner by which a glider can come off the runway varies dramatically. Often, the affected pilot is faced with a real dilemma that plays out in a matter of seconds. A wing is low, perhaps dragging on the runway. He believes he can lift the down wing if he simply persists a bit and waits for airspeed to come up. In the mean time he's beginning to veer. If he releases early, the matter is low energy and low consequence. If he holds on for a little longer, he thinks he can raise the wing yet his speed is increasing and the potential for adverse consequences increase perhaps with the square of velocity. Should the pilot fail to get to the release quickly enough and the wing stays low, the resulting veer will be high energy. The veer off the runway can occur at speeds that can do real damage. I've seen it happen. In my, thus far, unsuccessful efforts to change contest practice in this regard, I've spoken to several different contest operations managers and I've also spoken to flagmen about the issue. I'm routinely pooh-poohed. The flagman will tell me that he can run out of the way if a wing is coming at him. One flagman told me that he can jump over the wing if he needs to. But wait a minute... what if the wing that is coming at him is coming at 30 or 40 MPH? What if it happens to be the high wing that is coming at him or the fuselage? What I observe at contests is that wing drops are sufficiently rare that the flagman always becomes complacent (assuming he or she is aware of the hazard in the first place). As the towplane and glider roar by, he'll be sipping from his water bottle while maybe sauntering a few step out of the way. If it were the case that our flagmen were selected for sprinting ability and if their practice was to swing the flag then immediately begin sprinting for the sidelines then perhaps the present hazard wouldn't be. Yet, that is never what happens. Requiring a sprint from the flagman at every launch would be an unreasonable expectation for sure. At any rate, few would have the endurance strength and athleticism to do 30 to 50 successive 25 yard sprints in launch time summer heat. It isn't as if there is no alternative to using a flagman for launch control. There is an alternative that works extremely well and puts no one at risk in the safety cone. The launch controller stands aside the sailplane with a handheld radio as the glider is being hooked up and readied for launch. The launch controller gives particular radio commands to take up slack and then a particular distinctive word sequence command to commence the launch. Barb Smith, who's served as operations manager at a few Parowan contests in recent years, seems to have pioneered this method. This is really a very good scheme. There is no double communication required. The launch controller is in a position to easily observe the towline slack and also very well observe the readiness of the wing runner, the glider and the glider pilot too. I urge that we adopt the radio method of launch control at US contests. Let's not wait until we've killed the flagman. I agree- mostly. The mirror is adequate to know when to take up slack. When the rope is tight- we're going flying. Stop the launch- wing down. Radio only when unusual happens. UH |
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#5
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On Monday, June 30, 2014 7:58:07 AM UTC-4, Gav Goudie wrote:
Stop the launch- wing down. I hope the full sequence includes the glider pilot releasing the rope before the wing goes down! Wing down is stop/hold. If tug pilot does not appear to respond, then release. No need for stopping the operation to hook up again unless really needed. Note this is a contest environment with pilots on the top of their game and not the local club operation. UH |
#6
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So in effect the glider is now in a not ready to launch configuration (the
wing is on the ground and probably being held there by the wing runner) yet everything is primed to enable it to launch including the tug pilot who has 150 - 260hp available in an instant. Unfortunately being at the top of ones game doesn't mitigate the risk that could develop from the the above scenario and one could provide lots of evidence where the competition environment can create extra pressure where basic airmanship and experience evaporate in an instant. I am all for an efficient launching machine in comps but you have to keep the basics in check, relying solely on a visual cue/clue isn't really using all the options that are available. Typical parlance that seems to work on grid launches I have been involved with as used by the launch marshall goes something like: "Tug GC, next glider is Discus on the left hand side" "Tug GC take up slack" Or "Tug GC take up slack and hold" (if a relight or a landing tug is on late finals etc) "Tug GC all out, all out" or "STOP STOP STOP" (delete as appropriate) The tug/towplane pilot has not had to respond to any of this, his or her actions or rather lack of actions will alert the launch marshall that he/she has an issue or is unable to comply leaving them entirely focussed on configuring his tug for the launch and keeping his/her eyes moving around the sky, the runway ahead and glider behind for any conflicts. GG (Comp Pilot & Towplane/Comp Towplane Pilot) At 12:32 30 June 2014, wrote: On Monday, June 30, 2014 7:58:07 AM UTC-4, Gav Goudie wrote: Stop the launch- wing down. I hope the full sequence includes the glider pilot releasing the rope before the wing goes down! Wing down is stop/hold. If tug pilot does not appear to respond, then release. No need for stopping the operation to hook up again unless really needed. Note this is a contest environment with pilots on the top of their game and not the local club operation. UH |
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On Monday, June 30, 2014 8:28:30 AM UTC-6, Gav Goudie wrote:
Typical parlance that seems to work on grid launches I have been involved with as used by the launch marshall goes something like: "Tug GC, next glider is Discus on the left hand side" "Tug GC take up slack" Or "Tug GC take up slack and hold" (if a relight or a landing tug is on late finals etc) "Tug GC all out, all out" or "STOP STOP STOP" (delete as appropriate) I am not sure the system you are suggesting came across very well in your post. I think you are saying that instead of using a signal relay person that you have a radio relay aka a Launch Marshall directing the tow plane. It is probably a better idea than the signal relay person. However the concern of course is to not clutter up the radio frequency so bad that aircraft (tow planes) in the pattern can't make adequate position reports with out stepping on each other transmissions. Very doable, but all aspects of this procedure need to be considered for each site. Brian (Comp Pilot & Towplane/Comp Towplane Pilot) also. |
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Gav Goudie wrote, On 6/30/2014 4:58 AM:
Stop the launch- wing down. I hope the full sequence includes the glider pilot releasing the rope before the wing goes down! The pilot may not be aware of the reason for halting the launch. The reason might be out of his sight, or his actions may be the reason the launch needs to be halted, so you can not wait for him to release the rope before putting the wing down. Of course, if he thinks he is in peril when the wing goes down, he can release at any time. -- Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me) - "A Guide to Self-Launching Sailplane Operation" https://sites.google.com/site/motorg...ad-the-guide-1 - "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm http://tinyurl.com/yb3xywl |
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I was ground operations director at the last contest Steve entered (Region 9 at Moriarty). Steve expressed his concerns to me while on the grid. I totally agree that safety of the pilots and ground crew are of paramount importance, but unfortunately, this is difficult to achieve when dealing with volunteer crews for flagging, hookup and general awareness. I would be ecstatic to have a crew that was experienced in all of these functions, but recruiting and training an efficient bunch of kids at the last minute is a problem. We had CAP volunteers, but of varying levels of attention, physical ability and general awareness. The flagman and tug positioning flagman were both very experienced glider pilots with a highly developed sense of self-preservation (i.e. they knew when to back out of the way and run if necessary)
With all of the confusion going on with an efficient launch at a contest, the last thing you would want are extraneous radio calls. The radio is for flight ops. Period. It is hard enough for multiple tow pilots to maintain a sense of awareness in the pattern without a bunch of "take up slack" or "hold" calls. And do not even suggest that the tow pilots change between ground and air frequencies. Visual signals are the absolute best method with a properly briefed ground crew. Yes. in many instances, the risk of a dropped wing and subsequent departure is real. Unfortunately, without a system as sophisticated as something found on a Nimitz Class carrier, visual cues and volunteers are the norm.. If the pilot feels uncomfortable, launch can be declined. If the volunteer flagman feels uncomfortable, he can be advised to allow more clearance. In any case, a mature, alert flagman is a must. A sense of self preservation is a good thing to have when standing beyond the launch line of any accelerating vehicle. I got some great photos and a couple of scars while ignoring this principle when I was shooting drag racing photos, Please try to trust the ground crew, but do not hesitate to speak up if you see something obviously wrong or hazardous. |
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Mark - please don't interpret that I'm complaining about how Moriarty contest was operated. Not at all. Moriarty was run fantastically well and I'm very appreciative of that.
My issue is generic to all US contests where there's a flagman stationed in front of the launching gliders and that seems to be most contests these days. Any person given that job will assuredly become complacent about the hazard after a few hundred gliders have whizzed by without incident. The hazard is insidious most particularly because it's rare. My issue is that it really won't matter what kind of self preservation instinct someone has when there's 50 feet of wing arcing directly towards him at 30 or 40 MPH. That really can happen. We need to change the scheme before someone gets creamed. |
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