Auster Agricola (oz11666)
About this Plan
Auster Agricola. Rubber scale model.
Quote: "Hi Steve & Mary, Here are some scans from the January 1957 issue of Model Aircraft magazine, cleaned up a bit for clarity.
Ron Warrings plan of Austers' rather unsuccessful entry into the crop-dusting field is the only one I have seen for this A/C type, unlike the numerous model plans available for Spitfires, Mustangs, etc, etc. Scaled-up it would probably make a nice flying R/C plane. I have not attempted to straighten any of the 'wonky rib' alignment, mainly because of the cross-hatch background, (and laziness) :-) Cheers,"
Quote: "The Agile Agricola. A 19 inch span rubber-powered scale job of Auster's crop-duster. By Ron Warring.
THE fuselage is constructed entirely of sheet. Choose light, soft 1/16 sheet for the sides and top and bottom sheeting, and harder (preferably quarter grain) stock for the formers. The tail surfaces should be cut from very light quarter grain stock.
Outline of the fuselage side can be traced direct off the plan. More conveniently, remove the centre pages from the magazine, lay the fuselage drawing over a sheet of balsa and pin-prick, or transfer the drawing onto the balsa with carbon paper. Use the first side marked out to cut a second, identical side. The formers should be similarly marked out, F1 being of 1/8 sheet and all the others of 1/16 sheet.
Mark the position of the formers on the inside of each side. Before assembling on the formers, cement on the 1/16 sheet doublers at the rear peg position and circles of celluloid to cover the rear windows. Assemble the sides on formers 3 and 4 first. Then join at the rear end and cement in formers 5 and 6. Finally fit formers 1 and 2, noting that the sides have to be pulled in at the bottom. Use pins to hold in place until the cement has set.
The top panels are cut from 1/16 sheet and fitted. Clean up the nose, as necessary, and cement on the sheet bottom. The rear leg should be bent and secured before adding the rear bottom sheeting. The upper cowling is finished by covering with 1/32 sheet.
After cutting the tailplane and fin, check that these fit accurately together. Cement the tailplane into the fin slot and then cement the fin into a slot in the fuselage top. Note that the rear leg protrudes slightly to stick into the fin. Check that the fin and tailplane are assembled true and square.
The wing panels can be built directly over the plan. Two alternative forms of rib spacing are shown. Use the full line positions only if you want to build a light wing, otherwise use the dotted rib positions in the centre section and add additional ribs in the outer panels at the dotted positions. Ribs can be traced from the full size patterns.
The port wing panel can be built over the right wing plan by laying out the leading and trailing edges and spar over the dotted lines. The outer panels are cemented to the centre section with 1-1/4 in dihedral at each tip. A 1/16 in sheet dihedral brace is fitted against the spar at the dihedral joint. No gussets should be necessary.
Two false spars are let into the leading edge of the centre section to carry the undercarriage legs. The legs should be bent and bound to these spars before cementing in place. Use the scale length of leg shown on the drawing if a 5 in diameter plastic propeller is to be fitted. For better performance, fit a 7 in diameter plastic propeller and lengthen the wire legs as necessary to give ground clearance.
The wings are covered and doped before fitting to the fuselage. Check that the fuselage cut-out shape matches the contour of the finished wing. If not, trim to a good fit. Then cement the wings permanently in place, sighting against the tail surfaces for accurate alignment. The fuselage need not be tissue covered. After sanding down perfectly smooth, it can be coloured with dope to the line shown on the plan. Registration lettering and control hinge lines, etc., should be ruled on with black dope. The jet exhaust pipes are carved from 3/16 in square, wrapped with gumstrip and cut off at an angle to cement to the sides of the bottom cowling..."
Supplementary file notes
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User commentsThe Auster Agricola looks identical to the Zlin Z-37 Cmelak, except for engine configuration.
M Stikeman - 29/10/2019
The Auster (first flight) predates the Zlin by 8 years. One could say the Zlin looks like the Agricola!
David Duganne - 29/10/2019
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