Tipo-Too (oz12893)

 

Tipo-Too (oz12893) by David Boddington from Aviation Modeller International 1998 - plan thumbnail

About this Plan

Tipo-Too. Radio control sport biplane model. Uses Jedelsky-style wing. For 1 cc diesel or .049 engines.

Update 23/03/2021: Added article, thanks to RFJ.

Quote: "The original monoplane Tipo (Italian for mouse), was the subject of a full size Premium Plan presentation in AMI May '96 issue and has proven popular with both free flight and R/C wallahs alike.

Since it's always best to work in the principle that you can never get too much of a good thing, El Boddo drew up this biplane version to extend the fun value even further. For two channel R/C, it will fly on any good .049 motor, while for three function R/C operation, with throttle control, just up the engine capacity to a 1 cc diesel - ah, that smell!

The PAW 1 cc diesel, retrofitted to Tipo Too, improved the aerobatic performance to a lively degree. Loops, barrel rolls, stall turns are all possible without losing height and the high degree of manoeuvrability allows flying in a small area. It all adds up to a lot of fun per penny.

The construction is light, simple and no too hungry for wood. The example you see here is the test prototype originally flown with .049 and three servo R/C system. It flies fine and is mildly aerobatic with the .049.

As with all small models, the choice of wood is important. Light, straight grained wood -please, no oak! Cut two fuselage sides and turn one over to mirror the other so you get one left and one right hand sides. Mark out the former positions and add the balsa strips, using the formers to space the vertical ones. If you are making the free flight version, use all-sheet formers to the rear, but make up strip formers for the radio version.

Complete the fuselage, except for the top sheeting. Make up the tailplane and fin and glue into place for the R/C version. For free flight, the tailplane should be banded on, so provide dowels for the bands.

Radio gear should be positioned well forward. Rudder control movements are transmitted via closed loop lines which exit to the rudder horns via the fuselage top deck. Before sheeting over the fuselage top, hook up the rudder control runs and mark onto the fuselage sides the exit points for the control cables. Also, install the elevator push rod and cut the exit slot in the fuselage side. Then, remove the rudder control wires, sheet over the fuselage top and cut the exit slots for the rudder control cables.

Wings are easy, with Jedelsky all sheet construction and ar built flat over the plan, before separating the two halves at the centre line to set the dihedral angle. Don't be put off by this type of wing construction - it is simple and very effective!
Dope bandage onto the top of each wing to stiffen the centre section.

Clear dope (non shrinking type) the bottom of each wing panel and the tailplane and tissue cover all other surfaces using normal shrinking dope, thinned 40% with cellulose thinners. Follow up with a further coat of non-shrinking dope to fill the pores. Finally, decorate to taste.

Control surface throws for the R/C version should be 3/8 in each way for rudder and 1/4 -5/16 in each way for elevator. Take-offs are perfectly feasible if the wheels are not too small."

Supplementary file notes

Article.

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Tipo-Too (oz12893) by David Boddington from Aviation Modeller International 1998 - model pic

Datafile:

Tipo-Too (oz12893) by David Boddington from Aviation Modeller International 1998 - pic 003.jpg
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Tipo-Too (oz12893) by David Boddington from Aviation Modeller International 1998 - pic 004.jpg
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User comments

The plan seems to have a typo printed on it re engine size (.49 not .049). Let's call this a plan for .049 engines.
SteveWMD - 23/03/2021
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