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Posted: Apr 1, 2019

Manufacturers Continue to Refine and Improve Aerial Designs

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Manufacturers Continue to Refine and Improve Aerial Designs


Fire apparatus makers have introduced a number of new and redesigned models of aerial ladders and platforms with the aim of improving the ease of use and safety of their rigs as well as wringing out a little extra working length on the aerials.

ROSENBAUER

Rosenbauer has introduced a new aerial model to its aerial vehicle lines, the new King Cobra. Dave Reichman, Rosenbauer’s national sales manager, says the King Cobra is part of the Cobra platform line and is a 100-foot model that changes the fly section, the last eight feet of the aerial, to an articulated fly. “The articulated fly on the King Cobra is similar to that used on our telescopic box boom design on the T-Rex,” Reichman says.

 1 Rosenbauer has introduced the 101-foot King Cobra aerial ladder platform that has the last eight feet of the aerial set up as an articulated fly section. (Photo courtesy of Rosenbauer.)

1 Rosenbauer has introduced the 101-foot King Cobra aerial ladder platform that has the last eight feet of the aerial set up as an articulated fly section. (Photo courtesy of Rosenbauer.)

There are several benefits to using an articulated aerial, Reichman points out. “There are a lot more commercial and retail buildings with big parapets, and the articulated fly allows firefighters to get over them easily,” Reichman says. “The articulated fly also can be used for below-grade water rescues. In addition, articulation allows the operator to set the platform on the ground at any place around the truck, even the front, and allows for working in tight alleys and streets for both rescue and fire suppression activities.”

Reichman notes that Rosenbauer did not redesign its aerial or torque box structures for the new rig. “It uses the same tried-and-true Rosenbauer ladder,” he says. “We didn’t lighten the aerial or change the torque box structure but rather shifted the weight of where the pump and other equipment are located.”

PIERCE MANUFACTURING

Tim Smits, senior sales manager for aerial products at Pierce Manufacturing Inc., says Pierce’s newest ladders are the Ascendant® series aerial models, which put a 107-foot aerial on a single-rear-axle chassis. “The Ascendant series offers lighter weight coupled with higher performance as well as a lower cost of ownership,” Smits says. “There also are the benefits of getting better performance out of the drivetrain and engine and better stopping distances.”

 2 Pierce Manufacturing makes the 100-foot Ascendant™ midmount platform on a tandem rear ax
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Posted: Apr 1, 2019

Fire Apparatus Rollovers, Part 3

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G-Force: How Much Is Too Much?


In “Rollover Threshold and G-Force” (February, 2019), we continued to discuss lateral g-force. Lateral g-force is the evil force that is continually trying to make a fire apparatus flip over or lose control. Fire apparatus operators must have a thorough understanding of lateral g-force so they are better able to operate a vehicle safely.

G-FORCE REVIEW

During February’s discussion, we learned that if the amount of lateral g-force exceeds the rollover threshold of the vehicle, the vehicle will roll over. And if a vehicle rolls over, it clearly indicates that the vehicle was driven in excess of its handling capabilities. As an example, if the rollover threshold of an engine is 0.62, and the fire apparatus operator is rounding a curve at a speed that places 0.61 lateral g’s on the vehicle, he is driving the vehicle at nearly 100 percent of its capability. Under no circumstances should a fire apparatus operator drive so close to the upper limits of the apparatus’s capabilities! Driving in this manner leaves no room for error. Therefore, it is important for the fire apparatus operator to understand how to judge the amount of lateral g-force acting on a vehicle based on the sensation of g-force the driver experiences on his body.

 An example of a g-meter I purchased online. This is an extremely useful teaching tool when used by a trained instructor. (Photo by author.)

1 An example of a g-meter I purchased online. This is an extremely useful teaching tool when used by a trained instructor. (Photo by author.)

The concept of sensing g-force is known to pilots as “flying by the seat of your pants.” A good pilot is able to safely operate his airplane without reading the instruments on the dashboard. This is because an experienced pilot is able to correlate the sensation of g-force he is experiencing to the performance, behavior, and limitations of the airplane. This understanding of how to read g-force with your body and understand when things are getting uncomfortable and unsafe is a key aspect of safe driving.

TRAINING

So, we must ask ourselves, at what point will the sensation of lateral g-force start to make us feel uncomfortable? Depending on the reference source, many experts believe that once the lateral g-force exceeds 0.20 to 0.30 g, a driver will start to feel uncomfortable. In fact, many highway design manuals recommend limiting curve speeds and curve designs to keep the lateral g-force under 0.20 g. By keeping the lateral g-force under 0.20, it will help to mitigate the feeling of discomfort felt by the driver. This is important because once a driver begins to feel uncomfortable, he may panic and make an inappropriate steering or braking maneuver. It is often this inappropriate steering or braking maneuver that leads to a crash. This is especially true in a vehicle with a high center of gravity, where there is little margin for error.

Fortunately, a safe and professional fire apparatus operator will never allow the

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Posted: Apr 1, 2019

Tractor-Drawn Aerials Continue to Enjoy Resurgence

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Tractor-Drawn Aerials Experience Resurgence in Popularity


The heritage of today’s tractor-drawn aerials (TDAs) can be traced back to the late 1800s when the trailers were first given rear steering but were still drawn by horses. Horsepower (hp) today still powers TDAs but in an engine-driven form, yet TDAs, also known as tillers, retain their advantages of maneuverability, versatility, and equipment-carrying capacity.

MANEUVERABILITY

Paul Christiansen, aerial sales manager for Ferrara Fire Apparatus, says that an aerial’s maneuverability “is more important than ever before, especially where a lot of new development is in apartment complexes and downtown commercial areas where buildings are tightly packed. The maneuverability of a TDA is so much better, especially in making tight turns, than compared with a nontiller truck.”

Ferrara Fire Apparatus built this 101-foot TDA on an Igniter chassis powered by a 600-hp Cummins engine and an Allison 4000 EVS automatic transmission. (Photo courtesy of Ferrara Fire Apparatus.)

1 Ferrara Fire Apparatus built this 101-foot TDA on an Igniter chassis powered by a 600-hp Cummins engine and an Allison 4000 EVS automatic transmission. (Photo courtesy of Ferrara Fire Apparatus.)

Pete Hoherchak, product manager of aerials for KME, agrees that maneuverability is the number one advantage in using a TDA, followed by the ability to carry a large amount of ground ladders and having lots of compartmentation. “You are able to get the truck down tight streets and alleys and into tight fire scenes where you wouldn’t be able to get a rear-mount aerial,” Hoherchak observes.

KME built two 101-foot AerialCat™ TDAs for the Honolulu (HI) Fire Department on Severe Service™ LFD cabs with 18-inch raised roofs and prepiped waterways. (Photo courtesy of KME.)

2 KME built two 101-foot AerialCat TDAs for the Honolulu (HI) Fire Department on Severe Service LFD cabs with 18-inch raised roofs and prepiped waterways. (Photo courtesy of KME.)

He notes that a TDA tractor without a pump or water tank has a wheelbase of 141 inches. “Wherever the tractor can go, the trailer can follow,” Hoherchak says. And when setting up in tight spaces, the width of the jack spread is important, he says, citing KME’s 14-foot jack spread on its Read more

Posted: Apr 1, 2019

Fire Apparatus Aerial Pedestal

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Training on the Pedestal


Many fire departments across the country perform “in-house” training for pump operator and aerial apparatus driver training. If you’re lucky, your department has a training course setup that is designed to give you the operational skills needed to operate the apparatus as well as drive the apparatus.

Some departments have members go offline and report to the training academy to learn how to operate and drive the apparatus. These classes are great for larger departments that may have numerous different types of aerial apparatus (aerial, tiller, and tower ladder) because it gives the firefighter knowledge of each of the apparatus’s physical differences as well as their different tactical operations. In whatever training you provide, creating a qualified operator who can skillfully operate the apparatus while responding to and working at a fire or emergency should be our common goal.

With the onset of the computer age, we are less likely to provide all our students with handouts, and we just let them see a photo on the screen of a particular item. Sure, that works well in a lecture atmosphere, but does it really let our students learn and memorize a specific item? If your department operates a few different types of aerial and tower ladder apparatus, the pedestal can be much different. The main control levers are usually the same compared with years ago, but other switches will be in different locations. Giving your students a drawing of each apparatus’s pedestal will enable them to study the control and switch locations. Our goal in teaching students the location of the pedestal’s main control handles—extension, rotation, and hoist—is so they can operate the ladder apparatus without continually staring or glancing downward at their hand and lever position to operate the controls. This might seem trivial, but they’ll be operating these expensive apparatus when a life is at stake at a window or on a fire escape and have to operate around wires, street lights, and tree branches to reach those trapped.

LESSON ONE

So, our first pedestal training lesson should be to teach the operator the three main control handle locations and functions. The levers are three-position levers with two distinct movements from the center safety/neutral position. If the lever is either pushed away or pulled toward the operator, the lever will perform one of two functions. To learn the lever locations, we should teach the students the “E-R-H” acronym: Extend-Rotate-Hoist. The first lever, working from the left to the right, is for ladder extension and retraction; the middle lever is for rotation (left or right); and the right lever is for hoist position (raise or lower the level of the boom). Some levers may have safety mechanisms on them that must be lifted as the handle is moved or it won’t release from the neutral position. Others may have a button that must be

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Posted: Apr 1, 2019

Fire Apparatus Purchasing: Frustrating the Vendors

Apparatus Purchasing: Frustrating the Dealers


A dealer is the individual, regardless of gender, who interacts with an apparatus purchasing committee (APC) during the purchasing process. A dealer is also called a vendor, salesman, salesperson, sales representative, dealer principal, peddler, and inside sales contact. What he is called is unimportant. How he is treated is.

With few exceptions, APCs have two perceptions of fire apparatus dealers. One is a favorable opinion reserved for preferred dealers. Many APCs elevate a preferred dealer to the level of a deity. That dealer’s word is gospel—never to be doubted or challenged. It would be blasphemy to actually question him. Those same APCs have little care, concern, or use for the rest of the dealers in the Western Hemisphere—until they are needed. Not only is that hypocritical, it is frustrating to nonpreferred dealers.

Definitions of frustrating include infuriating, challenging, annoying, irritating, aggravating, and discouraging. Quite often, purchasing committees will only communicate with one or two dealers. Their reasoning is most, but not all, fire departments know whose rig they want to purchase. The rare exception is when an APC truly evaluates multiple apparatus manufacturers by meeting with their respective representatives. Some fire departments do not realize their interactions with dealers, or lack thereof, can have negative effects both before and after specifications are written. After an APC has finalized its purchasing specifications is when nonfavored vendors can really become frustrated with the process.

Purchasers should be aware that dealers they have not communicated with only have the purchaser’s written document to evaluate when deciding if they should submit a proposal. They should not hold vendors in contempt because the vendors may not understand some verbiage in their specifications. When addressing a vendor’s question, a purchaser’s inadequate written response or an obviously misleading verbal answer can be aggravating to the point that a dealer will not bid. Purchasers should realize vendors deal with the purchasing process on a daily basis and they just know when a purchaser needs multiple bids to justify a preferred purchase. They know they are being taken advantage of. Many dealers can justifiably say it is not their first rodeo or, to paraphrase an insurance company’s popular television commercial, “We know a thing or two because we’ve seen a thing or two.

THE REAL WORLD

Most apparatus vendors are paid on a commission basis. Some are salaried, and some are on a salary plus commission schedule. How much they earn is not the fire department’s business. The point is the majority do not get paid unless a sale is made. It is not unheard of for vendors to expend an untold amount of nonreimbursed hours and expenses and not get the job. It is an accepted part of the business. There is a saying that “all is fair in war and games,” and most vendors expect to lose a sale from time to time. What aggravates them is an APC not being up front and honest. Regardless of whether it is unintentional or deceitful, it is not right. Dealers are justifiably infuriated when they are lied to. That’s why many do not bid.

Although most dealers will not admit it, some fire departments and purchasing committees are known in the industry for being difficult to deal with. They’re unreasonable, they do not follow their own specifications, and they have a condescending “holier than thou” attit

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