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Assembly Manual for IAR-80  (Version 1.3) 

Copyright 2012 Thomas A. Jacoby and WarbirdKits.com 

4

 

 

Cut a hole in the top skin for the aileron crank. 

 

Apply a thin bead of Pro-Bond or aliphatic resin to the 
tops of the ribs and spars and along the top of the 
leading and trailing edges. Lay the top skin in place 
and pin it firmly to the ribs and spars. Let the wing 
assembly dry. 

 

Laminate two WT pieces to make a wing tip block. 
Glue the wing tip block to the wing. 

 

Notch the leading edge for the 1/8” dowel. 

 

Sand the wing panel to its final shape. 

 

Repeat these steps with the opposite wing panel. 

Wing Panel Joint 

 

Use a long sanding block to prepare the root rib faces 
for joining. 

 

Join the panels using 15-minute epoxy between the 
root ribs. Use masking tape to hold the bottom skins 
flush. With one wing tip flat on the building surface, 
elevate the other wing tip to the required total dihedral.  

 

Reinforce the root rib joint by wrapping it with nylon or 
glass cloth. Saturate the wrap with CA.  

 

Use a 1/8” drill bit to clear the wing bolt hole and the 
dowel hole in the leading edge. 

 

Use a sharp blade to cut the ailerons free from the 
wings. Use a sanding block to finish the aileron leading 
edges and the aileron slots in the wing. 

 

Cover the wing as desired.  

 

Hinge the ailerons. 

 

Install the 1/8” dowel in the leading edge. The dowel 
should project about 1/4” forward of the wing. 

Fuselage 

 

Lay a sheet of wax paper on your building board and 
pin the crutch over it. 

 

Glue formers F2U through F10U to the crutch.  

 

Glue the DORSAL KEEL in place to formers F6U 
through F10U. 

 

Glue cockpit floor CF in place on formers F4U, F5U 
and F6U. 

 

Glue the FORWARD KEEL in place on formers F2U, 
F3U and F4U. 

 

Plank the top of the fuselage with 1/16” balsa strips. 
The planks should overhang the rear of the fuselage by 
at least 2.5”. At the tail, do not plank above the cutout 
for HSP in F10. Start with a 3/4” wide plank against the 
crutch. Finish planking with 1/4” wide strips. 

 

Glue the 1/4” DORSAL CAP in place. 

 

Temporarily fit the canopy to the fuselage and trace its 
outline on the fuselage with a soft pencil. 

 

Cut the cockpit opening about 1/8” inside the canopy 
outline. 

 

Remove the upper fuselage from the building board. 

 

Cut a slot in the upper fuselage planking for the 
elevator pushrod. 

 

Prepare F4L as follows: 

Summary of Contents for IAR-80

Page 1: ...t 2012 Thomas A Jacoby and WarbirdKits com Industria Aeronautica Româna IAR 80 Romania s Indigenous WWII Fighter Version 1 3 Scale 1 12 Wingspan 34 in Area 146 sq in Length 29 in Weight 17 19 oz Power Speed 400 ...

Page 2: ... and pushrods Covering materials and paint Glue 6 Volt Speed 400 power system or equivalent size brushless inrunner NOTE We recommend that you read this entire manual before beginning construction Construction Wing Skins Each wing bottom skin consists of two laser cut pieces forward center and aft Gently clean up the mating edges of the pieces with 220 grit paper on a sanding block Lay the pieces ...

Page 3: ...t the front of the wing skin Note that the leading edge strip sits on your building board not on the wing skin Glue the aileron spar to the bottom sheet and ribs Glue the aileron leading edge to the bottom sheet about 1 32 aft of the aileron spar DO NOT glue the aileron leading edge to the aileron spar Glue the stub ribs to the rear of the aileron leading edge and the bottom sheet Cut three ailero...

Page 4: ...nd the dowel hole in the leading edge Use a sharp blade to cut the ailerons free from the wings Use a sanding block to finish the aileron leading edges and the aileron slots in the wing Cover the wing as desired Hinge the ailerons Install the 1 8 dowel in the leading edge The dowel should project about 1 4 forward of the wing Fuselage Lay a sheet of wax paper on your building board and pin the cru...

Page 5: ...r parts of the tail skid assembly skid skid mount skid mount skid Cut slots in the ventral keel for the tail skid assembly DO NOT glue the tail skid assembly in place until after you have covered the fuselage Fill the lower fuselage area between F10L and F11 with scrap 1 4 balsa Cut the planking and keels to remove the section of fuselage below the wing Laminate the two 1 16 ply wing mounts WM The...

Page 6: ... motor mounts MM to formers F1 and F2 and to the 1 4 square sticks Cowling Temporarily install the motor and propeller shaft adapter Trim the round section of plastic cowling to shape Glue the cowling nose to the cowling Set former F0 in place on the fuselage Glue the cowling to former F0 making sure that it is aligned with the fuselage and the motor shaft is centered Empennage Join the two elevat...

Page 7: ...the entire model with a light coat of Krylon Crystal Clear varnish Flying Setup Keep the model as light as possible for best performance The IAR 80A should balance at 1 5 behind the leading edge at the center chord This is approximately 24 of the mean aerodynamic chord MAC For the first few flights you may want to move the balance point forward 1 4 Set the control throws to Elevator 1 2 up 1 2 dow...

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