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Stevens AeroModel RV-4 Manual

1:8 scale speed 300 sport aerobat
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RV-4
1:8 Scale Speed 300 Sport Aerobat
S300 (R2.04)
Span 34.5" / Length 30.5" / Area 250 Sq." / Weight 14.5-16.5oz
Copyright 2005 – Stevens AeroModel All Rights Reserved.

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Summary of Contents for Stevens AeroModel RV-4

  • Page 1 - 1 - RV-4 1:8 Scale Speed 300 Sport Aerobat S300 (R2.04) Span 34.5” / Length 30.5” / Area 250 Sq.” / Weight 14.5-16.5oz Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 2: Warranty

    Further, Stevens AeroModel reserves the right to change or modify this warranty without notice. In that Stevens AeroModel has no control over the final assembly or material used for final assembly, no liability shall be assumed nor accepted for any damage resulting from the use by the user of the final user-assembled product.
  • Page 3 Hacker A20-20L / Direct Drive / 9x4.5 E Prop / 3x1320 Thunderpower LiPoly - With optional mount kit. Items You May Need: Thin and Medium CA (super glue) Five Minute Epoxy Wax Paper or Plastic Wrap Razor Blade(s) Fine Grit Sand Paper Rat-Tail File Clear Tape Balsa Wood Filler Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 4: Assembly Tips

    GENERAL ASSEMBLY INSTRUCTIONS: Thank you, for purchasing this Stevens Aeromodel 1:8 Scale RV4 – Small Field Sport Plane. This kit provides the builder and pilot a refreshing change of pace from heavy “ARF” style plywood box airframe construction and blends stick and tissue design methods of the past with state of the art CAD technology and precision interlocking laser cut parts;...

  • Page 5: Tail Feathers

    F23B F19C New to this release of the RV-4 are provisions for a cleaner rudder pull/pull assembly. Previous versions of the RV-4 had the rudder pull/pull exit the fuselage bottom (sharing a single exit tube) This system works well and may still be employed but I have provided an optional method for a cleaner pull / pull install.
  • Page 6 Hacker B20L, Mega 16/15x, GWS EPS 400C or other motors similar in weight will require relocating one or more servos aft and external to the fuselage assembly. New to this release of the RV-4 we have provided an optional servo tray that replaces the aft most truss diagonal of the fuselage assembly. This servo tray will allow the user to mount one or more servos in the tail compensating for the additional nose weight of these heavier power systems.
  • Page 7 Next, install the opposite fuselage side. Support the assembly on a flat surface and slowly work into position go slowly and make sure all the tab and notch pieces are properly aligned and seated. Do not force the fit and DO NOT GLUE. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 8 LG1, F1, and the fuselage sides. Key parts F2A into position spanning LG1 and F2 as illustrated. Remove former F1 from the 1/8” balsa sheet and friction fit to fuselage assembly. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 9 13. Next remove the pre-cut 1/8” Sq. Stringer from the 1/8” balsa sheet. The stringer spans F1, F3, and F7 friction fit into position. At this point also fit the 1/16” ply battery tray BT1 into position spanning F5, F9, and F11. Complete this step by securing these parts with thin CA. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 10 16. Install servo rail doublers F6A and canopy tab CP2. Note the notching in F6A to accommodate the aft canopy tab CP2. Test fit parts as shown in illustration then commit them to the structure with thin CA. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 11 Key in place, fore to aft, parts F17, F19, F21, F23, and F25 (note installation position of F25 in photo – the part should extend beyond the top longeron but not below the bottom longeron. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 12 F25 (see illustration). 22. Remove the plywood Tail Wheel bracket F18 from the 1/16” ply sheet. Match end of “U-Channel” to 1/32” hole in F14. Laminate to fuselage with thin CA. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 13 FS2. Test fit, wet with glass cleaner, secure one end with thin CA, and then gradually tack down the sheets to the formers with your preference of thin or thick CA. I like to start at the side and work to the middle. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 14 Test fit – then secure one end with thin CA, gradually tack down the sheets to the formers with thin or thick CA. Finally, trim and sand leading edge of turtle deck sheeting flush with the front of F15. 27. Carve and sand aft section of turtle deck round as shown. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 15 LG4 over the assembly using the 1/8” drill bits to jig the fit. Drip thin CA into joint where gear legs exit the landing gear brace. Allow gear brace assembly to dry completely then once again test the fit in the gear block. Sand as required for a snug but smooth fit. Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 16: Motor Mount

    Use the mount etched “GWS” to mount the GWS EPS-300C/EPS-400C motor systems (The left side 10mmx10mm mount holes should be used when mounting the Stevens AeroModel Hacker B20L and Mega 16/15/x modular plywood motor adapters). The fit will be snug through formers F1 and F3 – go easy here and sand stick to fit if required.
  • Page 17 Build the leading edge. Remove part LE1 from the 1/16” balsa sheet and key it to ribs R1-R5 (Note: LE1 is keyed to only fit one direction). Remove part LE2 from the 3/32” balsa sheet and key to wing assembly along tabs in leading edge. Do not glue components at this time. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 18 Cap center wing section with CS5. Snug and align all parts into position then, while supporting the wing center section on a flat surface, begin running glue into joints. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 19 10. Next, locate the 3/16” balsa part CS6 and laminate into position in front of CS5. 11. Locate part S3 on the 3/32” balsa sheet and laminate to groove along the top of the main spar spanning ribs R1-R3. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 20 14. Remove parts R1A from the 1/16” balsa sheet and key into position (just outside of R1) as illustrated along the backside of the trailing edge center section. Do the same for the opposite side of the center section. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 21 R1 and R1A. Finally double the top of TE6 with the 1/8” balsa part TE8. Allow to dry and sand TE8 to follow the taper of the ribs along the trailing edge. 16. Remove parts WTA, WTB, and WTC and laminate together as illustrated to create a right and left wing tip. Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 22: Aileron Assembly

    – allow to dry then test fit to A5 (aileron trailing edge). Continue to fit remaining parts A1 and A2 to A5. Remember to build a right and left aileron… align flat over plan sheet and tack glue components together. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 23 Next, key part A4 to aileron assembly as indicated below. Tack glue to assembly. Finnish aileron assembly by installing the 3/16” square aileron leading edge to assembly (cut from the 3/16” balsa sheet). Final glue all aileron assembly joints. Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 24: Wheel Pants

    WP5A backing plate and provided #0 - 3/16” screws. Place a dab of thin CA on the outer most portion of the axle where it comes in contact with the wheel pant. Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 25: Tail Wheel

    Trim cowl along scribe line on the molded part. Assemble the two halves of the cowl using only liquid model airplane cement to secure the two halves. It is best to test fit the cowl to the fuselage before final gluing the part – adjust fit as required. Copyright 2005 – Stevens AeroModel All Rights Reserved.
  • Page 26 Grab the end-bell with the snap ring pliers and rotate the end-bell clockwise inside the can until the positive terminal dot resides just beyond the crimp but no farther then 1/16” clockwise beyond the crimp. Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 27: Final Assembly

    Apply adhesive back Velcro (not included) to battery tray. Mount battery with Velcro to BT1 battery tray. The supplied Velcro tie wrap is intended to augment the adhesive back mounting system – not substitute Mount receiver with Double Sided Tape or Velcro to F6 receiver tray. Copyright 2005 – Stevens AeroModel All Rights Reserved.

  • Page 28: First Flight

    Choose a calm day for your maiden trim flight! Slowly advance throttle – within a few feet you will be airborne. The RV-4 slows down nicely for landings; however, make your first landings with slight power-on until you are familiar with the aircraft’s stall.

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