The Martin JRM Mars is a large, four-engined cargo transportflying boat designed and built by the Martin Company for the United States Navy during World War II. It was the largest Alliedflying boat to enter production, although only seven were built. The United States Navy contracted the development of the XPB2M-1 Mars in 1938 as a long-range ocean patrol flying boat, which later entered production as the JRM Mars long-range transport.
Four of the surviving aircraft were later converted for civilian use to firefighting water bombers. Two of the aircraft remained based at Sproat Lake just outside of Port Alberni, British Columbia, with one, the "Hawaii Mars", remaining in operation until 2016. On March 28, 2024, the British Columbia Aviation Museum announced it acquired the aeroplane from Coulson Aviation. It flew on its last flight to Victoria on August 11, 2024. On the evening of Wednesday, August 21, 2024, just after 9:00 pm, the "Hawaii Mars" was on a 360-degree rotating trailer as it crept across the active taxiways of Victoria Airport towards the British Columbia Aviation Museum. It will become part of a permanent display there, taking the museum's "Crown Jewel" title. [1]
On April 25, 2024, it was announced that "Philippine Mars" will be acquired by the Pima Air and Space Museum in Tucson, Arizona to be put on permanent display there.[2] It is due to be flown there later in the year. It entered the Sproat Lake water for powered testing November 04, 2024. [3]
Design and development
The prototype XPB2M-1 Mars, 1942
The Glenn L. Martin Company scaled up their PBM Marinerpatrol bomber design to produce the prototype XPB2M-1 Mars.[4] The XPB2M-1 was announced on 8 November 1941. Delayed by an engine fire during ground runs, the aircraft first flew on 23 June 1942. After flight tests with the XPB2M between 1942 and 1943, she was passed on to the Navy. The original patrol bomber concept was considered obsolete by this time, and the Mars was converted into a transport aircraft designated the XPB2M-1R. The Navy was satisfied with the performance and ordered 20 of the modified JRM-1 Mars.[4] The first, named Hawaii Mars, was delivered in June 1945, but with the end of World War II the Navy scaled back their order, buying only the five aircraft which were then on the production line.[5] Though the original Hawaii Mars was lost in an accident on the Chesapeake Bay a few weeks after it first flew, the other five Mars were completed, and the last delivered in 1947.
JRM-1 "Philippine Mars" in December 1945
Operational history
U.S. Navy service
JRM-1 BuNo 76820, Philippine Mars taking off from San Francisco Bay, 1946
Named the Marianas Mars, Philippine Mars, Marshall Mars, Caroline Mars, and a second Hawaii Mars, the five production Mars aircraft entered service ferrying cargo to Hawaii and the Pacific Islands on 23 January 1944.[6] The last production airplane (the Caroline Mars) was designated JRM-2, powered by 3,000hp (2,200kW)Pratt & Whitney R-4360 engines, and featured a higher maximum weight and other improvements. On 4 March 1949, the Caroline Mars set a new world passenger load record by carrying 269 people from San Diego to San Francisco, CA.[7] On 5 April 1950, the Marshall Mars was lost near Hawaii when an engine fire consumed the airplane after her crew had evacuated. The remaining "Big Four" flew record amounts of Naval cargo on the San Francisco-Honolulu route efficiently until 1956, when they were beached at NAS Alameda.[4]
Civilian use
Moored on Sproat Lake, Vancouver Island. October 2006
Undergoing winter maintenance in 2008 with Philippine Mars in the background
Martin JRM Mars C-FLYL, Hawaii Mars
In 1959, the remaining Mars aircraft were to be sold for scrap, but a Canadian company, Forest Industries Flying Tankers (FIFT), was formed and bid for the four aircraft and a large spares inventory. The company represented a consortium of British Columbia forest companies, and the bid was accepted and the sale completed in December 1959. The four aircraft were flown to Fairey Aviation at Victoria, British Columbia, for conversion into water bombers. The conversion involved the installation of a 27,000L; 7,200USgal (6,000impgal) plywood tank in the cargo bay with retractable pick-up scoops to allow uploading of water while the aircraft was taxiing. The scoops allowed 27 tonnes (27 long tons; 30 short tons) of water to be taken on board in 22 seconds. Later some of the hull fuel tanks were replaced with water tanks.[8]
The Marianas Mars crashed near Northwest Bay, British Columbia, on 23 June 1961 during firefighting operations; all four crew members were lost. Just over a year later, on 12 October 1962 while parked onshore at the Victoria airport, the Caroline Mars was damaged beyond repair by Typhoon Freda when she was blown 200 metres/yards, breaking her back.[9] The Hawaii Mars and Philippine Mars had their conversion into water bombers advanced and entered service in 1963.[4] They appeared at local airshows, demonstrating their water-dropping ability. Flying Tankers Inc. flew the water bombers to hot spots around the province when a need developed, such as in August 2003, when a large forest fire threatened the outskirts of Kelowna, British Columbia.
On 10 November 2006, TimberWest Forest Ltd. announced they were looking for buyers of the Mars. A condition of sale was that the purchaser would have to donate one plane back to Port Alberni when they were retired, as a historic attraction.[10] The Glenn L. Martin Maryland Aviation Museum and British Columbia Aviation Council initiated a joint effort to preserve the aircraft, one for display in Maryland and the other at the current location in Canada.[11] On 13 April 2007, TimberWest announced the sale of both aircraft to Coulson Forest Products, a local forestry company in Port Alberni, British Columbia. The two surviving tankers are presently operated by Coulson Flying Tankers and are based and maintained at Sproat Lake near Port Alberni. On 25 October 2007, the Hawaii Mars ("Redtail") arrived at Lake Elsinore in southern California, on a private contract, to assist with firefighting efforts at the California wildfires of October 2007. Meanwhile, the Philippine Mars had been undergoing "extensive maintenance and renovation" and was expected to be ready to fly again by 2010.[12]As of 13August2009[update], the Hawaii Mars was in service fighting the La Brea Fire east of Santa Maria in Southern California.
The interior of Philippine Mars, August 2008. The large tanks hold Fire retardant, which is mixed with the water load
The aircraft can carry 7,200USgal (27,000L; 6,000impgal) of water and each deployment can cover an area of up to 4 acres (1.6 hectares). The aircraft can also carry up to 600USgal (2,300L; 500impgal) of foam concentrate for gelling the load drop.[13] They are mainly used to fight fires along the coast of British Columbia and sometimes in the interior. As of July 29, 2010, the Martin Mars was being used to fight the Mason Lake/Bonaparte Lake fire north of Kamloops.[14]
On 23 August 2012, the Coulson Group announced that the Philippine Mars, due to its lack of use for five years, would be retired and flown to the National Naval Aviation Museum at Naval Air Station Pensacola, Florida to become a static exhibit. The aircraft was repainted to its original U.S. Navy colors and was to have been delivered to the museum in November 2012.[15] After many delays, the trade deal of transferring the aircraft to the museum was put on hold by the Navy in June 2016, pending the outcome of the 2016 US Presidential election.[16]
Hawaii Mars and Philippine Mars at Sproat Lake, 2014
On 10 May 2013, the B.C. provincial government announced that the Hawaii Mars would no longer be placed on contract after the 2013 season, due to not having been used to fight any B.C. fires for two years and the operation of newer and more versatile aircraft by the Coulson group including a Lockheed C-130 Hercules converted to firefighting use. Although Coulson has stated that the Hawaii Mars has been under numerous recent upgrades to make it safer and more reliable,[17] no buyers have come forward to purchase the aircraft. Coulson also cautioned against any plans to open the aircraft as a tourist attraction, citing the 2013 closure of the Flying Tankers Bomber Base Museum from poor attendance.[18]
In May 2015, the Hawaii Mars received a small contract to be used briefly for training Chinese pilots. This was done using the Martin Mars to evaluate against civil certification regulations by the International Test Pilots School on how to handle such a large amphibious aircraft. The pilots would be involved with the Chinese state-owned Aviation Industry Corporation of China as they got ready to launch their forthcoming AVIC AG600 airplane.[19] Subsequently, in July 2015, the airplane was put back in service after public outcry, being awarded a 30-day contract from the BC Government to help with a particularly bad fire season.[20]
In 2016, the Hawaii Mars made its first appearance at EAA AirVenture Oshkosh in hopes of being sold or leased to a new home or business.[21] One of the pilots on the way to Oshkosh was well-known Kermit Weeks.
In January 2022, the Hawaii Mars was the subject of multiple news articles when it was placed on sale by the company Platinum Fighter Sales for over $5 million.[22][23] In June 2023, plans were being finalized for the transfer of the Hawaii Mars to the British Columbia Aviation Museum.[24]
On April 1, 2024, Coulson Aviation released a formal statement, publicly announcing that Hawaii Mars would be donated to the British Columbia Aviation Museum, located at the Victoria International Airport in North Saanich, BC. [25] Since this announcement, preparations have been underway onsite at the Sproat Lake Bomber Base in Port Alberni. On March 28, 2024, the province of British Columbia provided a $250,000 grant to "protect and preserve" the plane that had been instrumental in protecting the forests of the West Coast.[26]
On April 25, 2024, Coulson Aviation released a formal statement, publicly announcing that Philippine Mars would be donated to the Pima Air & Space Museum in Tucson, Arizona. Coulson Aviation plans to have both remaining Martin JRM Mars aircraft delivered to their museums by the end of 2024.[27] This development was foreshadowed by Coulson's donation of Hawaii Mars to the British Columbia Aviation Museum, announced just weeks before.
Hawaii Mars approaches its mooring on Sproat Lake after completing a high-speed taxi run as part of the VIP Experience Program, August 3, 2024.
On June 4, 2024, Coulson Aviation announced that they would offer two tiers of "VIP Experience Packages" to paying customers wishing "to get up close and personal with their Martin Mars water bombers."[29] These packages were described in $5,000 and $15,000 USD tiers. After realizing local demand and popularity, Coulson added a $1,000 CAD "Alberni Residents" tier, which required proof of address to purchase.
The VIP Experience Packages included a base "Water Taxi" package. "This experience will consist of a detailed walk around the airplane and participation in the daily inspection with the maintenance team." The top tier was the "Pilot Recurrency" Package. "This is for our hardcore aviation enthusiasts who dream of getting behind the controls of a 100,000lb (45t), 10,000hp (7,500kW) behemoth." The VIP Experience Program sold out in 3 days.[30]
On August 1, 2024, Hawaii Mars took flight for the first time since 2016,[31] making further preparation for the ferry flight to Patricia Bay on August 11, 2024.[32] The aircraft flew for a short period after experiencing a technical issue shortly after departure that required the in-flight shutdown and feathering of the number-four engine. After repairs, the aircraft performed multiple other test flights coinciding with its "VIP Experience" program.
Hawaii Mars approaches Patricia Bay with the Canadian Forces Snowbirds in formation, surrounding the aircraft.
On August 10, 2024, Hawaii Mars was flown around the Beaufort Range and Comox Glacier accompanied by a Short Skyvan photo ship. On board were photographers tasked with capturing Hawaii Mars prior to her retirement for various magazines and news media outlets including Skies Magazine. [33]
On August 11, 2024, the Hawaii Mars embarked on what would be its final flight before retiring to the British Columbia Aviation Museum in North Saanich BC. The aircraft was piloted by Peter Killin (captain) and Rick Matthews (first officer). Because of safety concerns for the departure and flight sequences, very limited details were made available to the public leading to the fight. Hawaii Mars departed Sproat Lake for the final time slightly behind schedule at around 3:40pm local time. The aircaft made low passes of the Sproat Lake Bomber Base, Port Alberni Harbour Quay, and the city, before embarking on its journey around multiple communities "with a flight path from Port Alberni to Campbell River, Powell River, then back to Comox and down the coast to Victoria." Hawaii Mars was accompanied by the Canadian Forces Snowbirds during the closing segments of the final flight to Patricia Bay in North Saanich. The arrival of Hawaii Mars at Patricia Bay was live streamed on YouTube. [34]
On August 14, 2024, Hawaii Mars was carefully maneuvered past breakwaters at the Patricia Bay Coast Guard station. [35] In the following days, the aircraft was carefully jacked onto a custom-built 360-degree swivelling trailer by Nickel Brothers, in preparation for an overnight move onto airport land to her parking spot at the British Columbia Aviation Museum.
On August 21, 2024, Hawaii Mars was transported from the Patricia Bay Coast Guard Station to her parking spot at British Columbia Aviation Museum by crews at Nickel Bros, a company known for moving large structures without requiring disassembly. [36] The move was completed successfully at approximately 9:15pm local time. [37] At present, the aircraft is viewable from a distance, and is scheduled for its official ribbon cutting ceremony on September 28, 2024.[38][needs update]
Variants
The XPB2M-1 in 1942
XPB2M-1
Model 170 prototype long-range patrol flying boat powered by four Wright R-3350-8 piston engines, one built, converted to XPB2M-1R.
XPB2M-1R
Prototype converted in December 1943 as a prototype transport version, armament removed, installation of additional cargo hatches and cargo loading equipment, existing hatches were enlarged and the decking was reinforced.
JRM-1
Model 170A, production long range transport variant, originally 20 aircraft ordered later reduced to six. Single-tail design, and having a longer hull with fewer bulkheads and a larger maximum take-off weight. It had also been fitted with equipment for overhead cargo handling and was powered by four Wright R-3350-24WA Cyclone engines with 4-bladed propellers, five built, surviving four converted to JRM-3.
JRM-2
The last JRM-1 on order was completed as the JRM-2 with the engines changed to 3,000hp (2,200kW)Pratt & Whitney R4360-4T engines with 4-blade, 16ft 8in (508cm) diameter Curtiss Electric propellers. Gross weight increased by 20,000lb (9,100kg).[39]
JRM-3
Model 170B, conversion of the remaining four JRM-1s re-engined with 2,400hp (1,800kW) Wright R3350-24WA engines turning 16ft 8in (508cm) Curtiss-Electric props, of which the inboard two engines were fitted with reversible-pitch devices.
The Old Lady–Bureau Number (BuNo) 1520. Ordered on 23 August 1938 and completed as the prototype long-range patrol XPB2M-1, it was first flown on 3 July 1942 and converted in December 1943 to transport variant and designated XPB2M-1R. Assigned initially to VR-8 at NAS Patuxent River, Maryland for crew training, it was later transferred to VR-2 at NAS Alameda, California and scrapped in 1945.
Hawaii Mars I– JRM-1 BuNo 76819 first flown on 21 July 1945 and delivered to the United States Navy. It sank on 5 August 1945 in the Chesapeake Bay and was disposed as scrap.
Philippine Mars– JRM-1 BuNo 76820, delivered to the USN on 26 June 1946 and assigned to VR-2 at NAS Alameda, California. Converted and re-designated JRM-3. Withdrawn from service on 22 August 1956 and sold in 1959, it was converted to forest fire fighting aircraft and registered CF-LYK (later C-FLYK). The aircraft continued to fly with Flying Tankers Incorporated until she and the Hawaii Mars were purchased in 2007 by the Coulson Group. The Philippine Mars has not flown on fires since the summer of 2006 and was repainted to original U.S. Navy markings in preparation for transfer to be a museum display at the National Naval Aviation Museum at NAS Pensacola, Florida. The plan to ferry her to the museum in April or May 2016[40] was put on hold.[16] As of September 2020, the Philippine Mars remains stored at the Sproat Lake base alongside the Hawaii Mars. On 25 April 2024, Pima Air and Space Museum in Arizona announced that it had acquired Philippine Mars, and that it will be delivered to the museum in late 2024.[41]
Marianas Mars– JRM-1 BuNo 76821, delivered to the USN on 26 February 1946 and assigned to VR-2 at NAS Alameda. Converted and re-designated JRM-3, it was withdrawn from service on 22 August 1956 and sold in 1959. Converted to forest fire fighting aircraft and registered CF-LYJ, the aircraft crashed into Mount Moriarty near Nanaimo, Vancouver Island, on 23 June 1961, when the water drop mechanism failed, leaving the aircraft unable to climb quickly enough to clear a mountain. In the ensuing crash, the crew of four were killed.
JRM-1 Marshall Mars burning near Honolulu, Hawaii, 5 April 1950
Marshall Mars - JRM-1 BuNo 76822, delivered to the USN, converted and re-designated JRM-3. It was destroyed by an engine fire and sank on 5 April 1950 off Diamond Head, Oahu, Hawaii.[43][44]
Hawaii Mars II– JRM-1 BuNo 76823, delivered to the USN on 23 April 1946 and assigned to VR-2 at NAS Alameda. Converted and redesignated JRM-3, it was withdrawn from service on 22 August 1956 and sold in 1959. Converted to forest fire fighting aircraft and registered CF-LYL (later C-FLYL), it remains the only aircraft of this type in service and flew with FIFT (Forest Industries Flying Tankers), FTI (Flying Tankers Inc.) and the Coulson Group at Sproat Lake, British Columbia until 2013 and briefly in 2015. According to aircraft fleet information provided by the Coulson Aviation website, "Coulson Aviation has significantly upgraded the Hawaii, bringing it to the higher aviation and safety standards of modern-day firefighting. The next-generation Hawaii Mars has an EFISglass cockpit and the ability to stream live data from certain key on-board indication systems. Other data now available from the aircraft include real time flight tracking, load data measuring, aircraft performance statistics, atmospheric condition at drop readings, and accurate drop location reporting."[45] The aircraft also is equipped with a satellite phone and cockpit voice recorder, Coulson Group Vice President Britt Coulson told CNN's Thom Patterson during a tour of the flight deck in 2016.[46] On 28 March 2024 the BC Aviation Museum announced that it will acquire Hawaii Mars II and move it to the Victoria International Airport. It made its final flight there on August 11, 2024.[47]
Caroline Mars– JRM-2 BuNo 76824, delivered to the USN on 10 May 1948 and assigned to VR-2 at NAS Alameda. It was sold in 1959 and converted to forest fire fighting aircraft by Forest Industry Flying Tankers. Registered CF-LYM. The aircraft was damaged beyond repair during Typhoon Freda at Victoria, Canada on 12 October 1962.[39]
"SHIP 8" – The unfinished nose section of what would have become the 8th Martin JRM-3 aircraft. This nose section was originally acquired by Forest Industries Flying Tankers in the 1960's, and was stored at the Sproat lake Bomber Base near Port Alberni. It lay in the bush for decades before it was recovered by Coulson Aviation, and in 2007 placed on display at the Sproat Lake Visitor Centre. Currently, "SHIP 8" resides at the Sproat lake Bomber base with its two sister aircraft, with an undecided fate.[48] The name "Ship 8" comes from several factory labels spray-painted on bulkheads of the unfinished section that read "SHIP8."
Specifications (JRM-3 Mars)
3-view line drawing of the Martin JRM-1 Mars
Data fromJane’s Fighting Aircraft of World War II[5][49]
General characteristics
Crew: four (with accommodations for a second relief crew)
Capacity: JRM Mars - 133 troops, or 84 litter patients and 25 attendants or 32,000lb (15,000kg) payload, including up to seven Willys MB jeeps
Water/foam load: Mars waterbomber - 60,000lb (27,000kg)
The Boeing KC-135 Stratotanker is an American military aerial refueling tanker aircraft that was developed from the Boeing 367-80 prototype, alongside the Boeing 707 airliner. It has a narrower fuselage and is shorter than the 707. Boeing gave the aircraft the internal designation of Model 717. The KC-135 was the United States Air Force (USAF)'s first jet-powered refueling tanker and replaced the KC-97 Stratofreighter. The KC-135 was initially tasked with refueling strategic bombers, but it was used extensively in the Vietnam War and later conflicts such as Operation Desert Storm to extend the range and endurance of US tactical fighters and bombers.
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↑ Associated Press, "Aerial Box Car Sent To Nimitz", The Spokesman- Review, Spokane, Washington, Monday 24 January 1944, Volume 61, Number 255, page 1.
↑ Boyne, Walter J. (July 2007). Beyond the Wild Blue (2nd edition): A History of the U.S. Air Force, 1947-2007. St. Martin's' Press. p.465. ISBN978-0-312-35811-2..
↑ "Specifications"(PDF). www.martinmars.com. Coulson Flying Tankers. Archived from the original(PDF) on 4 March 2016. Retrieved 7 August 2014.
Bibliography
Bridgman, Leonard. “The Martin Model 170 Mars.” Jane's Fighting Aircraft of World War II. London: Studio, 1946. ISBN1-85170-493-0.
Coulson, Wayne and Steve Ginter. The Mighty Martin Mars: From 1945 US Navy Transport to 21st Century, Initial Attack Firefighting. Port Alberni, British Columbia, Canada: Half Moon Bay Publications, 2009. ISBN978-0-9812987-0-2
Ginter, Steve. Martin Mars XPB2M-1R & JRM Flying Boats (Naval Fighters 29). Simi Valley, California, USA: Ginter Books, 1995. ISBN0-942612-29-9.
Lawrence, Joseph (1945). The Observer's Book Of Airplanes. London and New York: Frederick Warne & Co.
Mormillo, Frank B. (March–April 1999). "Call for Fire Attack!: A 'One-two' Formation by Mars and PBY Might Still Outclass the Modern Options". Air Enthusiast (80): 5–11. ISSN0143-5450.
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