Mini Mojo (oz2660)

About this Plan

Mini Mojo. Rubber sport model. Wingspan 15in.

Quote:- "Mini Mojo. Easy to build and fly, sports rubber model by R Preston.

Mini Mojo was a logical development of the Mojo (oz2670) design from Aeromodeller December 1980; it was scaled down to suit a Sleak Streak plastic propeller or any other six-inch plastic prop. Its construction is very straight forward and should present no problems to a beginner.

Wood selection is very important in a model of this size, so try to choose it carefully, ie try to keep the upper fuselage longerons stiffer than the lower longerons as this will help prevent the fuselage bending. Excessive weight is the biggest enemy to small models so try to keep the weight down by removing surplus cement from joints and choosing nice thin acetate sheet for the windows! PVA glue is recommended as it shrinks less than balsa cement and is less likely to cause any warps. The reward for this care is a much improved flight performance.

Let's start construction with the fuselage; lay out the upper and lower longerons onto the plan that has previously been greased with a candle or soap, cement into position all the vertical struts making sure that the rear motor dowel support is well cemented. The forward fuselage upper side panels can be added later when the fuselage is removed from the plan but before this is done the second side should be built directly on top of the first side. When these two sides are dry, they can be removed and carefully separated by a sharp blade.

Cement F2 and F3 into position on one side of the fuselage, making sure they are at right angles to it; when dry, cement the other side of the fuselage to F2 and F3 as shown on the plan. Leave this to dry well and then add the forward fuselage upper side panels. Bring the tail-end together and cement; do the same with the nose and hold together with adhesive tape or elastic bands. Do not use pins as these tend to split the wood.

All the cross braces can now be cemented into position but make sure that a gap is left between the two cross braces at the forward end of the windscreen to allow the tab on the acetate screen to fit between these braces. Add all the fillets but don't fit the wing dowels yet, this makes tissue covering so much easier.

The wings are very straightforward and are built directly over the plan as follows. Pin the main spars to the plan and then the trailing edges and tips; cement all the wing ribs into position ensuring that the 1/16th ribs are in the centre. Build the wings as two separate items, also making sure that the root end ribs are angled on the end of the spar, this gives the dihedral angle. Next add the leading edge..."

Update 26/06/2012: Added some fine photos of a finished model from Maciej.

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