T&J Models Mig-17 User Manual

T&J Models
R/C Model Designs By Jim Young
9356 Wendover Ct.
Brighton, MI 48116
www.tnjmodels.rchomepage.com
A Shark Fin on a Boomerang
The Mikoyan-Gurevich Mig-17 is the follow on of the more famous Mig-15, one of the first successful swept-wing jet fighters. It was designed to fix any combat problems found with the Mig-15. The result was one of the most successful jet fighters prior to the introduction of true supersonic planes. The Mig-17 is longer than the Mig-15 and was the first use of an afterburner in a Soviet fighter. 8000 Mig-17’s saw service from the early 1950’s through the 1960’s by twenty countries. There are almost 30 privately owned Mig-17’s in the United States, with several pulling airshow duties, giving many options for color schemes.
This Mig-17 is designed around the Great Planes Hyperflow EDF unit(GPMG3910) and the Ammo 24-45-3790 brushless motor (GPMG5185). This economical setup gives nice EDF performance on a 4S 2200mAhr LiPo battery pack. The outline is true to scale with the exception of larger ailerons and the position of the stab to simplify construction.
Copyright © 2014 Jim Young and T&J Models
Construction
The construction of this model requires some advanced level of modeling experience. All of the major parts are laser cut, and the builder is left to select wood and hardware to complete the model.
Materials List
The following is list of the major pieces of wood and hardware needed to complete the model. Additional wood may be required.
(5) 1/16” x 4” x 36” Balsa Wing and Fin Skins (2) 1/16” x 1/4” x 36” Basswood Rear Spars (1) 1/16” x 1/2” x 36” Basswood Wing L.E. (1) 1/4” x 1/2” x 16” Balsa Aileron L.E. (1) 3/16” x 1/2” x 36” Balsa Wing L.E. (4) 3/32” x 4” x 36” Balsa Fuselage Planking (1) Sullivan #507 Flex Cable (1) 1/32” x 36” Music Wire (1) 1/4” x 24” Dowel
Tail Feathers
Mig-17
stab. The plywood provides a “joiner” between the two halves of the stab and slots for CA type hinges. Add a small strip of light weight (0.5oz) glass cloth to the center of the stab to reinforce this joint. Taper the elevators and round the leading edge of the stab. Bevel the L.E. of the elevators, glue the control horns in place, and temporarily hinge the control surfaces.
The rudder is laminated in a similar fashion with 1/8” balsa on both sides of the plywood core.
The stab and elevator are 3/32” balsa laminated around a central core of 1/64” plywood. The grain of the balsa should run parallel to the trailing edge of the
The fin is built up and has features to slide on to the fuselage formers. Sand the front of each rib to match the angle of the L.E. Pin the ribs in place over the plans and glue the ¼” balsa L.E. and T.E. Glue the V6’s in place using scrap 1/16” plywood to make sure the gap is correct. Glue the V7 fin tips in place.
Page 2 Copyright © 2014 Jim Young and T& J Models
Plane and sand the T.E. and tip to match the ribs.
Sheet the fin with 1/16” balsa. Remove the fin assembly from the board and cut an opening for the stab between V3 and V4. Add scrap balsa blocks at the front and rear of the slot to fit close to the stab.
Mig-17
Wings
Prepare the top and bottom wing skins. Edge glue two sheets of 1/16” balsa together. Use the plans to cut the wing sheeting leaving it slightly over sized at the L.E. and root. For the top skin, bevel the trailing edge of the sheeting to the line shown on the plans.
Install the elevator flex cable as shown on the plans. Remove the building tabs from the ribs and sheet the other side. Cut an opening in the sheeting between V3 and V4. Glue the stab in place, making sure it is square to the fin. Temporarily hinge the rudder and glue the control horn in place.
Glue the balsa spar box top and bottom (SB1) to the plywood spar box sides (SB2). Use two layers of scrap 1/16” plywood between the sides to ensure the spar will fit. Position R2 on the spar box and glue it in place up against the tabs. Slide R1 and R3 on to the spar box and glue in place. Glue the outer spar box top (SB3) and bottom (SB4) in place. Sand the outboard end of the spar box to match the L.E. Sand the front of each rib to match the angle of the L.E. (make right and left hand ribs).
Page 3 Copyright © 2014 Jim Young and T& J Models
Mig-17
Pin the spar box assembly and the rest of the wing ribs in place over the plans. Glue the 1/16”x1/4” basswood rear spars in place.
Glue R2A in place making sure it is level with the board. Glue the 1/16” balsa T.E. in place and sand the top to match the rear spars. Glue the 1/16” basswood sub-leading edge and plane/sand it flush with the ribs. Note there is a slight bend in the L.E. at R4 and it should taper slightly outboard of R7. Glue the top sheeting in place, and trim it flush with the L.E.
Remove the wing assembly from the board. Use pinholes to locate R2, R4, and R5 for the wing-fences.
Jig the wing up-side-down over the plans. Make sure the wing is properly pinned down and touching all of the jigs to set the correct washout.
Glue the 1/16” plywood servo hatch mount in place. At the L.E. make sure
Page 4 Copyright © 2014 Jim Young and T& J Models
Loading...
+ 7 hidden pages