Grumman FM2 Wildcat - Profile control line stunt model, for .29 to .40 power.
Quote: "Combat scale profile of the Grumman carrier fighter. F4-F Wildcat by Nick Ziroli.
The F4F was originally designed in 1935 and as strange as it may seem, it was to have been a biplane. It never left the drawing board though due to the development of the Brewster Buffalo and the fact that the Japanese were conducting flight tests on their A5M, which in 1937 would become the first monoplane carrier fighter in active service.
At the outbreak of WWII, the Navy was unprepared for the Air defense that would be so vital in the Pacific. In December of 1941 there were only 248 F4F-3's in service between the Navy and the Marines. By the end of the war 7,898 Wildcats had been produced and served the U.S. and the British, who called it the 'Martlet'.
Although the Wildcat was not an outstanding performer, (the Zero was faster and could outclimb it), it's ruggedness, fire power and skilled pilots enabled it to set a combat record of nearly seven enemy aircraft downed for every loss, an outstanding record to say the least.
Our model is a rugged and practical profile version of the Wildcat. It has performance characteristics that are suitable for a beginner or an expert. With a hot .19 or any .29 engine for power, the beginner will find the model slow enough for him to think about what he's doing, yet fast enough to stay out on the lines during the abrupt maneuvers that are sometimes performed. As a stunt trainer, performance is responsive yet smooth with a 29 or 35. For those interested in real stunt flying or slow combat, the performance is great with a 35 or .40 engine.
The model must of course be light in weight to give maximum performance, so select materials carefully, using firm and hard stock only where specified. Building time is no longer than the average profile model. However with the addition of added scale detail and color trim the model has an extra something, not found in standard profile models.
CONSTRUCTION: The wing being the only major piece of construction is built first. Cut out all the wing ribs using medium 3/32 sheet. Mark location of ribs on the shaped leading and trailing edges and cut notches for ribs. This helps in lining up ribs and adds much strength to the framework.
The 3/16 x 3/8 medium hard top spar is pinned damn on the plan and ribs No. 2, 7 and 13 are cemented in position on each wing. Note that the wing is built upside down to give a straight top with slight dihedral on the bottom surface. This is due to the taper in thickness. Cement leading and trailing edges in place on the six ribs, making sure there is no twist in the wing structure. Use blocks under trailing edge to hold alignment. When this has dried, cement remaining ribs in place, omitting rib No.1.
Add 1/2 in plywood center braces as shown on the plan. Now cement rib No.1 in place followed by the bottom spar. Let dry thoroughly before re- moving from plan. Install 1/2 in plywood bellcrank mount and control system, leaving pushrod a little longer than necessary. Cover center-section with 1/16 sheet. Carve 1/2 in sheet wing tips to rough shape, partially hollowing the outside one to receive approxi- mately one ounce of weight..."
This is an Uncle Willies plan.
Many thanks to Pit for confirmation with this plan. As with many Uncle Willies plans, details have been changed and all credits removed. In this case the plan title was also changed (from F4F to FM2) - it seems the the original plan was a profile "Grumman F4F Wildcat" by Nick Ziroli, published in FM April 1964.
Direct submission to Outerzone.
Update 21/08/2018: Added article, thanks to Pit.
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