3 or 4
43 ft. 4 in.
60 ft. 8 in.
The Grumman Guardian, officially AF2, was the largest single engine aircraft ever flown by the United States Navy.
The model "W" Grumman Guardian had a crew of four and was unarmed. It had an ocean search radar. This was the submarine hunter aircraft.
The model "S" Grumman Guardian was the submarine killer. It had a crew of three. It had a search light, a short range radar, and could carry 4,000 lbs.of ordnance including depth charges, rockets and homing torpedoes.
Grumman Guardian aircraft saw limited action off the cost of Korea from 1951 to 1953. After they were retired from active duty in 1955, some Grumman Guardian aircraft were equipped with an 800 gallon tank in their bellies to be used as water bombers.
Total Grumman Guardian production was 389 aircraft, with the last one produced in March of 1953.
The Grumman Guardian makes an unusual and unique radio control airplane. However it appears to be more popular as a control line model. These usually can be converted.
In the picture above is the Grumman Guardian from Jerry Bates Plans. It has a 112 in. wingspans and 81.5 in. length. Power can come from 5.0 c.i.d. engines. The all up weight is from 40 to 45 lbs.
Kit Cutters has a kit of the 112 in. wingspan Grumman Guardian from Jerry Bates Plans.
The Grumman Guardian from Scale Plans and Photo Service plans has a wingspan of 80 in. Power comes from an Evo 35GT engine swinging a 19 x 8 propeller. All up weight is 18.5 lbs.
There is a Grumman Guardian kit sold by Brodak. It builds to a wingspan of 42 1/2 in. and a length of 30 in. Power can be from .32 to .36 engines.