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Academy of Model Aeronautics Sukhoi SU 31M Instructions Manual

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Lanier R/C
WARNING! THIS IS NOT A TOY!
THIS IS NOT A BEGINNERS
AIRPLANE
This R/C kit and the model you will build
from it is not a toy!
serious bodily harm and property damage.
It is your responsibility, and yours alone -
to build this kit correctly, properly install all
R/C. components and flying gear (engine,
tank, radio, pushrods, etc. and to test the
model and fly it only with experienced,
competent help, using common sense and in
accordance with all safety standards as set
forth in the Academy of Model Aeronautics
Safety Code. It is suggested that you join the
AMA and become properly insured before
attempting to fly this model. If you are just
starting R/C modeling, consult your local
hobby dealer or write to the Academy of
Model Aeronautics to find an experienced
instructor in your area.
Write to : Academy of Model Aeronautics,
5151 Memorial Dr, Muncie, IN 47302
Sukhoi SU 31M
37% Sukhoi SU 31M
It is capable of
LIMITED WARRANTY
Lanier R/C is proud of the care and attention that
goes into the manufacture of parts for its model
kits. The company warrants that for a period of
30 days, it will replace, at the buyers request, any
parts or material shown to the company's
satisfaction
to
workmanship or material at the time of purchase.
No other warranty of any kind, expressed or
implied, is made with respect to the merchandise
sold by the company. The buyer acknowledges
and understands that he is purchasing only a
component kit from which the buyer will himself
construct a finished flying model airplane. The
company is neither the manufacturer of such a
flying model airplane, nor a seller of it. The buyer
hereby assumes the risk and all liability for
personal or property damage or injury arising out
of the buyers use of the components or the
finished flying model airplane, whenever any such
damage or injury shall occur.
Any action brought forth against the company,
based on the breach of the contract of sale to the
buyer, or on any alleged warranty thereunder,
must be brought within one year of the date of
such sale, or there after be barred. This one year
limitation is imposed by agreement of the parties
as permitted by the laws of the state of Georgia.
1
Instructions
have
been
defective
in

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Summary of Contents for Academy of Model Aeronautics Sukhoi SU 31M

  • Page 1 Academy of Model Aeronautics of the buyers use of the components or the Safety Code. It is suggested that you join the...
  • Page 2 Sukhoi SU 31M Lanier R/C Instructions Before starting to build, we urge you to read these instructions while reviewing the plans. They contain some important building sequence as well as instructions and warnings concerning the assembly and use of this model. At least read what we have to say and then make your own determination.
  • Page 3 Sukhoi SU 31M Lanier R/C Instructions Assemble the F1 former the two M1 motor box sides and the F2 former. Do not glue. Bolt the two 1-1/2” x3” aluminum angles on Use masking tape to hold together. bottom of each M1 flush with the bottom. Use #8x1”...
  • Page 4 Sukhoi SU 31M Lanier R/C Instructions have to hang off the end of the work board because of the step up at the rear for the stab mount. Insert the wing tube through the fuselage side and the M1. Don’t glue anything at this point.
  • Page 5 Sukhoi SU 31M Lanier R/C Instructions If you are going to use the Ohio Superstar F2C to F4. From F4 to the rear there is only Haigh style tail wheel, measure 2-3/4” from one stringer. Take the excess balsa from the the rear of the tail wheel plate and drill a ¼”...
  • Page 6 Sukhoi SU 31M Lanier R/C Instructions It may be necessary to sand on the holes that the phenolic tube passes through. When the alignment is correct glue in place. Sand the phenolic tube flush with the fuselage sides. Set the fuselage on a level table and insert the 48”...
  • Page 7 Sukhoi SU 31M Lanier R/C Instructions have to add a small piece of scrap 3/32” at the front top edge of the sheet to make it big enough. Remove the sheet and trim to the line. Locate the F1A former and glue to front of fuselage flush with front.
  • Page 8 Sukhoi SU 31M Lanier R/C Instructions Using two short sections of ¼” dowel, align the H1 with the F1A and glue H1 to the hatch floor. Glue the dowels in H1. Be careful not to glue the hatch floor to the fuselage or to the F1A.
  • Page 9 Sukhoi SU 31M Lanier R/C Instructions Measure from the bottom edge of the sheet sheet in place. Apply a bead of thick CA forward 11” and draw a line. Measure up from along the outside edge of the center stringer that point 3-1/4”...
  • Page 10 Sukhoi SU 31M Lanier R/C Instructions Locate the printed instrument panel gauges The panel will be glued in after covering. The and the clear lens. This will be installed in cockpit floor can be sheeted (wood not one piece. Trim the clear lens to fit the supplied) or left open where the pilot can be backside of the instrument panel;...
  • Page 11 Sukhoi SU 31M Lanier R/C Instructions Align the gear on the mark you made 3/8” With the bolts temperately installed, fit a behind the bulkhead and centered up on the piece of ½” tri stock on each side of the gear fuselage.
  • Page 12 Sukhoi SU 31M Lanier R/C Instructions The cowl can be glued together to make a Using a long straight edge make sure the one-piece cowl or screwed together so it can cowl is parallel to the front hatch. be taken apart.
  • Page 13 Sukhoi SU 31M Lanier R/C Instructions After the cowl is fitted, glue the C1a to the top Firewall half inset from the edge ¼”. Tack glue and check that cowl is aligned properly and then Locate the ½” firewall and the ¼” lite ply glue down firmly.
  • Page 14 Sukhoi SU 31M Lanier R/C Instructions trailing edge. Do not throw away the 4. Locate the 8 - ¼” sq. hardwood spars and core packing shells. They will be needed glue them in the spar slots with epoxy or during the construction of the wing.
  • Page 15 Sukhoi SU 31M Lanier R/C Instructions add the 36” piece and the 6” piece. Then add the 18” piece. You will have to make a top and bottom skin by gluing the last two rows on the opposite side. Make up two sets of skins, see diagram above.
  • Page 16 Sukhoi SU 31M Lanier R/C Instructions band saw if possible, to cut out the aileron. 12. Cap the aileron leading edge with the piece that was inset ¼”. Make sure it is centered up on the aileron. Use white glue Leave the aileron taped to the packing and tape to hold it.
  • Page 17 Sukhoi SU 31M Lanier R/C Instructions Make sure the aileron is level, use the packing. 15. Locate the servo wells, on the bottom Cut off a piece of ½” dowel to the required side. Measure in 6-1/2” from the root of length.
  • Page 18 Sukhoi SU 31M Lanier R/C Instructions dried fill in any voids between the wing and This will align the dowel parallel to the main the W1 with putty. spar. Install the hard point for the wing mount bolt Anti rotation pins by measuring out 5-1/2"...
  • Page 19 Sukhoi SU 31M Lanier R/C Instructions top. Measure down 7-3/4” from this line and draw another one parallel to the top. At the bottom of the fin, measure back 12-7/8” from the leading edge and draw a line perpendicular to the bottom to intersect the top line.
  • Page 20 Sukhoi SU 31M Lanier R/C Instructions Using a band saw cut the bevel on both piece leaving 1/16” on the sides and in the middle. The ¾” piece glues to the back of the fin and extends to the bottom of the fuselage. The ½”...
  • Page 21 Sukhoi SU 31M Lanier R/C Instructions Locate the foam stabilizer halfs, the two SR root rib and slide it over the phenolic tube, do laser cut lite ply root ribs, the two laser cut lite not glue at this time.
  • Page 22 Sukhoi SU 31M Lanier R/C Instructions Locate the 3/32” laser cut balsa parts ST and Locate the four ½”x1-3/4”x18” elevator glue to ends of stab and the inset of the trailing edges and tape two together. Allow elevator one to extend past the other at the tip by 1/4”.
  • Page 23 Sukhoi SU 31M Lanier R/C Instructions Locate the parts to construct the dowel alignment jig, SI1, SI1A,SI1B. Glue the SI1A to the front edge of SI1, and the SI1B to the back edge of one of the SI1, Align on the two marks, this should give you a ¼”...
  • Page 24: Final Assembly

    Sukhoi SU 31M Lanier R/C Instructions the width of the rudder. A more scale appearance can be achieved by removing this from the rudder and elevators. The changes were made to improve 3D capability of the airplane. A 1/8" laser cut ply tank mount is included.
  • Page 25 Sukhoi SU 31M Lanier R/C Instructions F5 (1) 1/8” laser cut lite ply 3/32”x3”x36” (10) balsa sheeting, F6 (1) 1/8” laser cut lite ply turtledeck and hatch F6A (1) 1/8” laser cut lite ply 1-1/2”x18” phenolic tube spar carry through F7 (1) 1/4”...
  • Page 26 Sukhoi SU 31M Lanier R/C Instructions phenolic tube (1) 7/8"x6" phenolic tubes (2) 7/8”x12” aluminum spar (1) 7/8”x28” 1. DA 150 engine with mufflers 1/4”x3” dowels (2) front anti rotation pins 2. 32x10 Menz or 28x12 three blade 1/4”x1/4”x12” spruce servo mount Airhobbies prop.