Grumman Mohawk (oz1109)


Grumman Mohawk (oz1109) by Paul Plecan 1960 - plan thumbnail

About this Plan

Grumman Mohawk. Control line twin scale model, for K&B 15 power.

Quote: "Grumman Mohawk. Here is an unusual scale model with an unusual color scheme. Proportions for an authentic copy are excellent, with a long tail moment and general 'clean' overall shape. The variety of contrasting colors is enough to pop the eyes of any judge at a flying scale meet.

Care has been exercised to stay within the 'exact scale' area, with but two exceptions. One is the tail section, which is thinned for lightness and easy construction. The other deviation from scale is a simplified 'greenhouse' up front. True scale here would mean carving large canopy forms and heat-forming the puffed compound-curved sections for all areas but the windshield, which is flat. Since a great many potential builders falter and quit when it comes to any 'blown' style canopy, a somewhat simplified version is shown on the plans. Any celluloid of .020" to .035" thickness will do the job.

It is best to start with the wing of this particular design. Cut the required ribs, then the spar. It will be possible to cut a one-piece spar from a piece of 1/8 x 3" x 36" stock, but a spliced one will do as well, since the strength in this wing is in its covering and system of sub-spars. After cutting out a plywood spar brace, carefully attach it to the spar and allow to dry thoroughly. You can cut out formers or tail parts in the meanwhile.

Once the rib positions have been marked on the spar, the center section can be assembled over the plan. A very slight crack is all that is needed in the 1/8 x 3/16 sub-spars where the dihedral starts. Now before sheeting is applied, mount the bellcrank. For the lead-outs to come through the wing in the required manner, mount the bellcrank platform exactly as shown in the side view..."

Update 05/06/2014 : Replaced this plan with a much clearer version, thanks to JJ.

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