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The Abrams P-1 Explorer was a United States purpose-designed aerial photography and survey aircraft that first flew in November 1937. It was designed by aerial survey pioneer Talbert Abrams to best suit his needs for a stable aircraft with excellent visibility for this kind of work. Talbert, Ted to his friends, had purchased a WWI plane called a Jenny for use in his early aerial photography work.

This single, front engined airplane created many problems for good scientific photography. It was created to be very nimble in the air it was not made for stable flat flight. The engine leaked oil which would flow under the aircraft and get on the camera lens. The engine was noisy and the noise flowed back into the cockpit making conversation difficult. He conceived a plane with a wide wing span to be more stable with a rear engine to keep the camera clear. He wanted a delta type wing so side vision was possible. He hired two engineers Kenneth Ronan and Andrew Edward Kunzul in Marshall, Michigan who drew plans and began construction in the old Page Brothers Buggy Company factory.

Ronan and Kunzul operated an aeronautical repair station at the Marshall airfield. Ronan was in the first graduating class of aeronautical engineering from the University of Michigan. Careul planning and ten months of construction produced an airplane capable of more efficient and economical aerial photography.

To create the clear nose, so the pilot had unubstructed view, he called in the German company of Rohm and Haas, creators of plexiglas. With a wooden, male model of each window pane, the plexiglas was clamped in a frame much like a window frame. Then heated until it began to sag it was pushed down by two workers holding the frame until it was molded to the wooden model.

The plexiglas could then be trimmed and mounted in the frame work. When the Explorer came back for restoration, it was those panels which had been heated which survived the years as clear as when new. However through some abuse during disassembly they were destroyed.

It was a low-wing metal monoplane with twin booms and a central nacelle for the pilot and camera equipment. The pod's nose section was extensively glazed and the pusher propeller was cowled-in. The undercarriage was fixed and of tricycle configuration.

The Marshall Chronicle of November 25, 1937 carried the story on page one. The Explorer flew the first time on November 20, 1937 from Brooke Field in Marshall.

The Quarterly Journal of the American Society of Photogrammetry said, "this new craft is so unique in design as to resemble the mythical creation of a 'Buck Rogers' space ship of the year 2040". Vol III, number 4, Oct-Dec 1937.

The airplane was in the Sunday newspaper cartoon strip of 'Smilin' Jack' in February 1941. The cigarette company Wings reproduced its image in a color trading card.

Ted tried to interest the movie industry since WWI movies were popular and he tried to interest the military. It seems the military sources simply took the idea of the clear nose and offered it to other aircraft company. The Explorer windows were the first to be formed on a compound curve in history.

Originally powered with a 330 hp engine and a two bladed propeller it was sent back to Ronan & Kunzul to increase the horsepower to 450, which required braces to be added from the wing top to the fuselage and they added a three bladed propeller. Ted thought the increase horsepower would bring a buyer to his airplane.

World War II interrupted Abram's work, and the single aircraft built was put into storage for the duration of the war. Obsolete by the end of the conflict, it was donated to the US National Air and Space Museum in 1948, where it remains today awaiting restoration.

In 1968 a number of aviation friends met for lunch including Jim Linn who worked at Abrams Aerial Survey. He mentioned the Explorer and no one in the room had heard of it except one. Ron Dietz, who was a student pilot at that time, went to his car and returned with the May issue of the Private Pilot magazine. Here was a big story with photos of the aircraft.

The idea began that perhaps it was time for Lansing to do something for Mr. Abrams, who often provided financial support when asked. Ellis Hammond, President of the Michigan Aerospace Educational Association and Ron Dietz, engineer at Oldsmobile Division of General Motors, decided to put some time and money into the project.

Having worked with the Smithsonian's National Air and Space Museum's Assistant Director Don Lopez, the aircraft was released. In January 1975 the Explorer flew for the last time. In the belly of a Michigan National Guard C130 it arrived at Capitol City Airport in Lansing.

The aircraft was moved to a state owned hanger were Dietz was in charge of careful photography before any disassembly was done. He carefully made tracings of all the lettering so they could be faithfully redone at the end of the project.

The wings were sent to Montcalm Community College were they were carefully stripped, cleaned, repainted and recovered with silver painted fabric. The instruments panels and controls were disassembled and restored by Mr. Dietz's colleagues at Oldsmobile.

The aircraft was physically moved to the Lansing Community College aviation program where I lost daily contact with it. During a visit to the airport Hammond and Dietz lamented at the lack of attention and the shortage of restoration work versus repair work on the aircraft. They agreed to cancel their support of the airplane with the Smithsonian and suggested it was best for all to have the plane returned. In 1981 the Lansing Community College truck driving school took the plane back to Silver Hill, Maryland were it is today.

Specifications (P-1 Explorer)

General characteristics

• Crew: One, pilot
• Capacity: One passenger
• Length: 26 ft 6 in (8.3 m)
• Wingspan: 36 ft 8 in (11.7 m)
• Height: 6 ft 4 in (1.9 m)
• Wing area: 200 ft² (18.58 m²)
• Empty weight: 2,100 lb (1,067 kg)
• Max takeoff weight: 3,400 lb (1,545 kg)
• Powerplant: 1× Wright R-975E-1 9-cylinder air-cooled radial engine, 365 hp (272 kW)

Performance

• Maximum speed: 194 knots (223 mph, 360 km/h)
• Range: 1,210 nm (1,400 miles, 2,240 km)
• Service ceiling 21,000 ft (6,402 m)

See also

v • d • e Lists relating to aviation General Timeline of aviation · Aircraft (manufacturers) · Aircraft engines (manufacturers) · Airports · Airlines Military Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft Accidents/incidents General · Military · Commercial (airliners) · Deaths Records Airspeed · Distance · Altitude · Endurance · Most-produced aircraft

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