May 22, 2020 | International, Security

Coulson’s CU-47 is ready for the fire fight

Posted on May 22, 2020 by Howard Slutsken

Leveraging its experience with fixed-wing air tankers, Coulson Aviation has unveiled its latest aerial firefighting conversion, based on the Boeing CH-47D Chinook heavy-lift helicopter.

In early March, the first Coulson-Unical CU-47 was flown from the company's Port Alberni, B.C., base to the Aerial Firefighting North American 2020 conference in Sacramento, Calif.

Featuring a 3,000 gallon roll-on/roll-off internal tank and an advanced Garmin avionics suite, up to 12 CH-47Ds will be converted into next-generation heli-tankers, in a partnership with Unical Aviation that was

announced a year ago.

“Unical provides us with the aircraft and a vast supply of parts,” explained Britt Coulson, president and COO, in an interview with Skies.

“They bought the entire Canadian Forces CH-47 parts inventory and were the largest purchaser of CH-47Ds from the U.S. Army.”

The twin-rotor Chinook is well known for its speed, size and payload. While the helicopter is often deployed on fire attack missions carrying a water bucket as an external load, Coulson wanted to give the CU-47 more flexibility and capability.

The company's engineers had already developed a 4,000 gallon Retardant Aerial Delivery System RADS-XXL for its Lockheed C-130 Hercules tanker conversions, and that tank was shrunk to create a 3,000 gallon RADS-L for the CH-47D conversion.

“It's the same overall design as the C-130. It shares most of the same hydraulic components, the same doors and the same design of a roll-in, roll-out tank,” said Coulson.

Other CH-47 internal tank systems utilize the small hook well in the centre of the helicopter as the water and retardant delivery port, but according to Coulson, that has its limitations.

“The other tank designs are plagued with flow rate issues, which means they don't pack enough punch to really get through [forest] canopies or drop in heavy timber – the hook well opening just isn't big enough.

“The lower the flow rate you have out of your tank, the slower and lower you have to fly. The problem with a big helicopter like a Chinook is if you fly too slow and low, your downwash is going to negatively affect the ground fire conditions and your drop is going to be ineffective.”

To increase and optimize the flow rate for the RADS-L, the belly of the CH-47D was modified by cutting the helicopter's lower skin and adding structure below the floor to accommodate the tank installation and a pair of drop doors, controlled by the pilots through a state-of-the-art touchscreen controller.

From the same touch panel, the pilots also control the CU-47's newly-developed retractable snorkel system to refill the RADS-L tank from water sources close to a fire's location.

Installed internally, the snorkel head sits flush with the belly when retracted, so that with no additional external drag, the helicopter can maintain its fast 140-knot cruise speed.

In a hover, the snorkel takes just four seconds to deploy and six seconds to retract, and the pilots and flight engineer can monitor the system's operation via a high-definition belly-mounted camera feed, displayed on the touchscreen controller.

“The snorkel system has exceeded our expectations and we're filling the entire tank in under two minutes,” said Coulson.

With the advanced capabilities of the Garmin avionics, the relocation of the flight engineer's panel, and the new RADS-L tank, Coulson originally believed that the CU-47 could be crewed solely by two pilots, without a flight engineer. But recent operational experience led the company to rethink that strategy.

“We realized that with a helicopter of this size, going into some of the smaller dip sites, to have an additional set of eyes looking out the side or back is valuable to the pilots. So we've de-modified the helicopter and gone back to a full-time flight engineer to provide that increased safety and situational awareness.”

Like Coulson's C-130 conversions, the CU-47 can also be tasked with night-time firefighting missions, thanks to the Night Vision System (NVS)

certification of the helicopter's avionics suite.

Wearing NVS googles, the CU-47's crew work in tandem with a fire attack “Intel” helicopter's pilots. The Intel crew uses a thermal camera to evaluate the behaviour of a fire, and if a drop is required, they take a page from military ground-attack operations. Using a laser, the Intel crew designates the target for the tanker.

“With a geo-referenced lock, the Intel helicopter can orbit, and the laser beam will stay on the same spot. It illuminates an area on the ground about the size of a car,” said Coulson.

The first CU-47 will soon be joined by a second RADS-L equipped helicopter, two CU-47's with upgraded avionics that will fly “bucket” missions, and a fifth, tank-equipped CU-47 that will deploy as a spare.

“All of our FAA testing [on RADS-L] has finished, we're just waiting for the final Supplemental Type Certificate signature,” said Coulson. “We're doing some minor cleanup to the helicopter to make sure that it's ready to go fight fires this summer.”

Howard Slutsken's lifelong passion for aviation began when he was a kid, watching TCA Super Connies, Viscounts, and early jets at Montreal's Dorval Airport. He's a pilot who loves to fly gliders and pretty much anything else with wings. Howard is based in Vancouver, B.C.

https://www.skiesmag.com/features/coulsons-cu-47-fire-fight

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September 12, 2018 | International, Aerospace

Air Force: High ops tempos, lack of aircraft, inexperienced maintainers among mishap risks
By: Stephen Losey A series of one-day safety stand-downs across all flying and maintenance wings has given the Air Force several clues on how to correct a string of troubling — and sometimes fatal — aviation crashes and other mishaps, the service said Monday. In a news release, the Air Force said the review identified six potential risks to aviation safety: stress caused by high operations tempos; a lack of time to properly focus on flying basics, mission activities and training; pressure to accept risk; a culture that pushes airmen to always execute the mission; decreased availability of aircraft; and the potential for airmen to become complacent when carrying out routine tasks. The full report summary, provided at Air Force Times' request, also raised concerns about the increasing requirements on maintainers, and low experience in some operations and maintenance personnel. The summary also cited “perception of ineffective training” as another area of concern. Air Force Chief of Staff Gen. Dave Goldfein ordered the stand-down in May, after several high-profile mishaps including the May 2 crash of a WC-130 Hercules that killed the nine Puerto Rico Air National Guardsmen aboard. “The review proved tremendously helpful as we continue to seek both high levels of safety with intense and realistic training,” Goldfein said in the release. “As air superiority is not an American birthright, our training must continue to be challenging and meaningful. But I also want commanders to have the decision authority to determine how far to push.” The service has distributed those findings to the field, the release said, and flying and maintenance leaders are using those findings to help guide their decisions. The summary also cites the aging fleet of Air Force aircraft as a problem contributing to increased maintenance requirements and decreased aircraft availability. The summary said that major commands provided the Air Force Safety Center with their aggregate feedback after completing their safety stand-downs, so senior leaders could find out what issues and concerns were identified across all wings. The Air Force has already started putting plans into place to address airmen's concerns, including adding more support back to squadrons, reducing additional duties, “enhancing information processes for aircrew mission planning” and cutting staff requirements, according to the release. Full article: https://www.airforcetimes.com/news/your-air-force/2018/09/11/air-force-high-ops-tempos-lack-of-aircraft-inexperienced-maintainers-among-mishap-risks
February 16, 2021 | International, Aerospace

Russian Company Plans New Generation Of Missiles
Piotr Butowski Moscow-based GosMKB Vympel, which designs air-to-air missiles, is funding its own research on what appears to be the continuation of a short-range missile project that had been halted decades ago. In late January, the company summarized its research and development work conducted in 2020. The most interesting project appears to be its research on “shaping the appearance of a future product 300M.” This work, financed by Vympel's long-term development fund, is to lay the scientific and technical groundwork for the Russian military and increase the company's export prospects, the company says. Undoubtedly, the current izdeliye 300M (“izdeliye” means “product” in Russian) is a further development of the K-30, or K-MD, short-range missile project, launched by Vympel in 1986 as part of its work on arming the fifth-generation MiG multirole fighter, which was halted in 1994 due to a lack of funding. Later, Vympel offered the 300 project while working on how to arm the Sukhoi PAK FA (Su-57) fighter. In 2006, the company said the 300 missile could have been ready in 2013, if enough funding had been available. Gennady Sokolovsky, the head of Vympel at the time, said that the 300 missile would “significantly exceed foreign missiles of a similar type.” The 300 was to be fitted with a new Merlushka, or “lambskin,” imaging infrared seeker developed by the AOMZ tactical missile company, enabling target identification and a lock-on range twice as great as its predecessors. The dual-pulse, solid-propellant motor was to provide relatively large specific impulse (about 100s), a measure of the engine's efficiency. The 300 missile was to have jet-vane gas controls instead of spoilers placed in the engine nozzle, as is the case with the current R-74 missiles. The efficiency of the variable gas nozzle is greater than that of spoilers; moreover, the presence of spoilers in the nozzle causes a loss of thrust. Judging from the course of events, plans to resume the 300 project were not approved at the time, and the simpler R-74M2, otherwise known as izdeliye 760, was chosen as the primary close air-combat missile for the Su-57. How the current 300M project changed compared with the previous version is not known, but most likely the modifications did not alter the overall configuration. If the changes were really significant, the project would have received a new index, not just an additional M letter. Certainly, the element base in the seeker and control system is new; the engine also may be improved. Of course, the 300M missile remains at the conceptual research stage, which usually does not yet involve the actual construction of a missile. According to Vympel's announcement, another short-range missile performed “about 30 firing tests” in 2020 as part of state evaluations, the final stage of tests before the missile is approved for full-scale series production. The announcement probably refers to the R-74M2, izdeliye 760, missile, which started firing tests on April 8, 2016, and in July 2019 was submitted for state evaluations on the Su-57. The Vympel R-74M2 is a further development of the in-service R-74M izdeliye 750 with the cross-section reduced so it can be fitted inside the internal quick-launch weapons bays of the Su-57. The remaining information provided by Vympel about its 2020 research and development work is very general. The types of weapons are not named, and only the categories are defined. In the long-range air-to-air missile class, one of the missiles “completed preliminary tests to the extent sufficient for the construction documentation to be awarded the letter ‘O.'” In the parlance of the Russian defense industry, the letter “O” denotes permission to make an initial serial batch of missiles. Vympel could be referring to a new-generation heavy missile, the izdeliye 810, intended for internal carriage in the Su-57 fighter. The 810 missile, never presented to the public, began undergoing firing tests on July 6, 2017; its maximum range is estimated at 300 km (186 mi.). https://aviationweek.com/defense-space/missile-defense-weapons/russian-company-plans-new-generation-missiles
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Coulson’s CU-47 is ready for the fire fight

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