To compete with the expanding range of lightplanes offered by other aircraft manufacturers, Piper produced in 1938 the Piper J-4 Cub Coupe. Retaining basically the same airframe as the J-3 Cub, this had a small increase in wing span and introduced improved landing gear with a fully-castoring tailwheel, hydraulic brakes and-speed fairings for the wheels. As powered initially by a 37kW Continental A50-1 it had the designation J-4, but introduction of the 48kW Continental A65-1 or -8 engine in 1940 brought redesignation as the J-4A, and later of the 56kW Continental A75-9 as the J-4E. In 1939 Piper introduced the J-4B, differing only in powerplant which initially, was a 45kW Franklin 4AC-171, but that was soon replaced by the 48kW Franklin 4AC-176-B2 without any change in designation. Last of the J-4s was the version powered by Avco Lycoming engines, the 41kW O-145-A1 or -A2, or 48kW O-145-B1, both of these Cub Coupes having the designation J-4F. Production of J-4s reached 1,250, and during World War II 17 J-4Es were impressed for service with the USAAF under the designation L-4E.
| MODEL||Piper J-4F|
| ENGINE||1 x Avco Lycoming O-145-B1 flat-four piston engine, 48kW|
| Take-off weight||590 kg||1301 lb|
| Empty weight||336 kg||741 lb|
| Wingspan||11.02 m||36 ft 2 in|
| Length||6.86 m||23 ft 6 in|
| Height||2.08 m||7 ft 10 in|
| Wing area||17.00 m2||182.99 sq ft|
| Max. speed||161 km/h||100 mph|
| Ceiling||3660 m||12000 ft|
| Range||547 km||340 miles|
|David Thomasson, 17.03.2015|
Did my training and first solo (1976) in a '39 J-4 at New London Airport in Central Virginia. The bench seat made it excellent for dual instruction. Always had to pay attention on takeoff, standing on the right rudder pedal to keep it from careening off the left side of the runway.
|vernon balsom, 20.11.2014|
just bouth a j4 #CF-MMJ have not flown it yet but hear it is a good plane it has a A200 and will be put on full lotis 1450 waiting to fly it in the spring
I am looking for the main landing gear for the J4E. any suggestions???? please help!!!
|Glen Stone, 26.06.2014|
Just started completely rebuilding 39 j 4 got to rebuild both wings best place to get parts..?
|albert piccioni, 30.04.2013|
Dick Munro,re your lycoming 320 J4,I,m restoring one and could use your advice
|Ernie Morris, 13.04.2013|
My first airplne ride was in a J-4 Cub Coupe at the old Moorestown airport in Moorestown New Jersey in 1953 the Pilots name was Stanley Dan.Thousands of hours and many aircraft later I rember that flight as though it was yesterday.
|Dick Munro, 11.03.2013|
I have one under homebuilt category with a Lycoming 0320. large cuffed wing , super cub tail feathers, cessna 180 yokes and Edo 2000 floats. PERFORMANCE, and then some!!!!
I wonder if anyone has the plans for the J4 and I see q is a good plane for the actions and performances that have and I would like contruilo as amateur. If someone takes the system pdf I thank you. Sincerely Yours: Miguel Angel Zeleme. (email@example.com)
I purchased a 1940 J4 to use to teach my children and our youth pastor to fly. One has soloed so far. I'd like to find an "owners manual or a operating handbook". Can anyone help me?
I have a J4E Could someone set the tail on a bath scale and give the weight thanks
|budd Henderscheid, 28.05.2012|
I AGREE WITH ONE COMMENT. THE J4 IS PIPERS BEST KEPT SECRET
92 MILES CRUISE AN HOUR ON ABOUT 3 GALS HOUR. DOORS ON EACH SIDE. SLIDING SIDE WINDOWS. A DREAM TO FLY ON SKIIS
YOU CAN FLY THIS AIRPLANE BACKWORDS IF YOU CAN STAND IT AND ARNT IN A HURRY
|Chuck Jewell, 30.06.2011|
I learned to fly in 1969 and needed something of my own to fly. I saw an add in the paper of an antique airplane for sale. It was a 1941 J-4-E in a T hanger on a small field. It had a variable pitch prop that kept backing off and had to be held in by hand. I do not think it was standard on a J-4-E so when I purchased it I had it replaced with a fixed wooden prop. I haven`t see it stated, but the J-3 had a tandem seating and the J-4-E is a side by side. in 1941 Piper tried to attract car owners by adding chrome. The control sticks were chrome and on the cowling they had 3 strips of chrome on each side. The wings were large and did not require any flaps. In a 30 mph head wind you can hold the ground speed to 0 mph!! It is a sweet plane to fly and whenever I took an instructor up for my Bi annual check ride they spent more time flying it than I did. I completely restored it in 1971 (covered it with seconite, not sure of the spelling, It is a fiberglass cloth. I flew it for many years and finally sold it. By the way, I think Piper put a nose wheel on the J-4 and called it the Tri Pacer??
I flew one around wtby ,ct airport for an hour. It flew at 6o mpr glided at 60 mph aan stlled at 35 mph. A clumsy old dog
|Stanley Olson, 24.12.2010|
I used to have a 1941 J4 in the early fifties. Built up some time in it and sold it for about 500 bucks, about what I gave for it. Last I saw it went to Canadian Registry, it's US N# NC41199. Nice little plane. If you see it somewhere, tell it hello from from me, I still remember you.
|Malcolm D. Quick, 13.12.2010|
1946 had my first ride in J-4, started work at local airport in exchange for dual time in N-24709. !971 retrired as pilot USAF. Found a J-4 to restore. It turned out to be my first ride and lesson acft. Restored it to 95% show and flew for several years until forced to sell for $1200.00. Have lost track of it. Anyone with info on it, I would love to hear where she is now.
A real joy to fly.
Currently in process of building a J4. I have most parts. Looking for anyone with a fusalage frame in any condition. please contact me at firstname.lastname@example.org if you know of any or other pieces/parts.
|GEORGE SOLOMON, 14.10.2010|
PAT In 1946 we bought 27899 in boise for the sume of 600.WE sold it in 1949 to guy named ART FLETCHER who washed the gear out.The last I heard of it in was in nampa.Would love to have picture of it
344 sw 177th st SEATTLE WA 98166 thanks George
|Peter Clifford, 23.09.2010|
Anybody interested in a copy of a Piper Coupe J4 Service Manual covering care and operation of the j4? I also have a parts manual. They both have detail drawing and technical data. I got these in the mid 1980's and I moving. These will be very useful to a j4 owner. Please contact me vai e mail if interested.
|Al Wrisley, 21.09.2010|
I owned a J4 in around 1958 with another gentleman. We paid $1200 for it and I flew it out of the Oberlin, OH airport. It had a 75 Continental which, I believe, had been converted to an 85. 8-1 glide ratio as I recall. Of course, with a 20 mph. headwind cars were passing me on the Ohio Turnpike. Loved the plane, though.
|Ernie Morris, 20.08.2010|
My fisrt airplane ride was in a cub coupe in 1953 at the old Moorestown(NJ) airport.It was a night flight. The pilots name was Stanley Dan.I went on to a CSMEL.instrument,CFI but never had the chance to fly the J-4.
Do you have any comments about this aircraft ?