Hi-Lo (oz15600)

About this Plan

Hi-Lo. Radio control sport model. All-sheet design.

Note the plan shows three possible layouts: biplane, cabin, or low-wing.

Quote: "A quickie for an .02 glow motor and light radio. Hi-Lo, by Peter Holland.

Hi-Lo is a really sporty job for that lightweight receiver. The original was designed to see how small and rugged one could make a model without imposing a severe penalty on the wing loading. The model is small enough to he tucked under one's coat and may be flown as a biplane, high-winged or low-winged monoplane. The crafty part of the design is the wing seating which enables this swopping of wings to be accomplished.

The construction is so simple that like the prototype, one evening should see the model ready for that final lick of fuel proofer.

If you have a small diesel or glow motor and Otarion, Kraft K3VK or similar lightweight receiver you should be in business. The actuator is an Elmic Conquest. You could also use pulse control on it in a similar manner to Twophin (oz4512) our Christmas RC plan, or 'Pulscycle' in last month's issue.

Construction: Ready for action? Blow the dust off the building board and off we go. Trace the fuselage size on to 1/16 hard sheet balsa taking care to mark the wing seating and tailplane angles correctly. A radial mounted engine was chosen for simplicity, this complete with its own tank was screwed to a piece of it 1/8 plywood backed up with scrap 1/8 sheet (F1). This is now pinned in place on lines marked on the balsa sides. This is important as it ensures the correct side and down thrust.

Add the simple rectangular fuselage formers: the one at the leading edge of the wing (F2) is laminated from two pieces of 1/16 sheet with grain at right angles to each other. Two others follow mid-chord to protect the receiver should the acuator break loose, and a 'skeleton' former added at the trailing edge.

Fuselage sides are gently cracked by bending them over the edge of a rule (place the side on the board, place a rule over the balsa and lift the exposed end of the fuselage side) ...crack! that does it, gently though we need one-piece, not two-piece fuselage sides. A liberal smear of cement over the crack maintains the strength thereof.

Little slots are cut in the fuselage sides and the acuator lugs pushed into them. This means that the actuator is actually built in as the fuselage is assembled. It makes a strong installation, saves weight and this type of actuator does not need much servicing..."

Direct submission to Outerzone.

Quote: "I found this in an old RCM&E magazine and couldn't find it on Outerzone so I thought you might like a copy... Regards,"

Supplementary file notes

Article.

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