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Stevens Aero Model SHAFT S400 Instruction Manual

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SHAFT
S400
Instruction Manual - Version 1.03 - Revised 03.28.2013
Span 39 in. / Length 35 in. / Area 340 Sq. In. / Weight 14-18 oz.
Made in the USA!
Of U.S. and Imported Parts
© 2007 Stevens AeroModel.
Page 1 of 33

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Summary of Contents for Stevens Aero Model SHAFT S400

  • Page 1 SHAFT S400 Instruction Manual - Version 1.03 - Revised 03.28.2013 Span 39 in. / Length 35 in. / Area 340 Sq. In. / Weight 14-18 oz. Made in the USA! Of U.S. and Imported Parts © 2007 Stevens AeroModel. Page 1 of 33...

  • Page 2: Power System

    ***Cautions*** 1. Power system. Overpowering this model with a heavier / more powerful system is not recommended. Stevens AeroModel recommends a power system no greater than 200W, a maximum pitch speed of 45 mph, and a maximum all up weight (AUW) of 20 oz. Outrunner motors like the Hacker A20 transmit a great deal of stress to the motor mount.
  • Page 3 REQUIRED TO COMPLETE KIT: Kit Contents: Rolled computer drawn Plan Sheets Illustrated Instruction Manual Laser Cut Parts Inventory (on next page) 2 - 24” length carbon fiber bar stock 2 - .045” x 18” length music wire 1 - 1/32” x 11.5” length music wire 2 - 3/16”...
  • Page 4 Laser Cut Parts Inventory © 2007 Stevens AeroModel. Page 4 of 33...
  • Page 5 Laser Cut Parts Inventory © 2007 Stevens AeroModel. Page 5 of 33...
  • Page 6 General Assembly Instructions Thank you, for purchasing this Stevens Aeromodel SHAFT – “Super Hi-Performance Aerobatic Flight Trainer”. 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 7: Tail Feathers

    Tail Feathers General Construction Notes: This kit features our proprietary Trus-Loc™ system as such typical “stick” type construction has been replaced by precisely cut “stick” components that are keyed to fit in only one direction. The “knuckles” of the truss are identified with an alpha-numeric use this to match adjoining truss components “A” to “A” and “B” to “B” etc. If a part does not fit properly chances are very good that you have the wrong part or the part is in backwards.
  • Page 8 Fuselage General Construction Notes: This fuselage utilizes an improved tab and notch construction method pioneered by Stevens AeroModel. Each component precisely interlocks using unique tab and notch sizes to allow the parts to only fit in one direction. Where parts orientation can be reversed or inverted parts are scribed with a reference such as “top” or “front” for proper orientation.
  • Page 9 Verify that upon completion of step 3, your assembled fuselage crutch looks identical to the first photo below. Next, key the 1/16” plywood G1 landing gear supports to both sides of the fuselage crutch, as illustrated in the second photo below. Test fit the completed fuselage crutch to one of the 3/32”...
  • Page 10 Key the 1/16” plywood G2 landing gear re-enforcement strap to the notches provided in the underside of the fuselage, and glue. Locate 1/8” balsa former F11 and install two (2) 4-40 blind nuts as illustrated below. Retain blind nuts with a drop of thin CA glue.
  • Page 11 11. Bond 1/16” balsa former F12 to fuselage as illustrated. Next, key 1/16” balsa part F13 to underside of fuselage atop F12, and spanning fuselage sides, and former F3. Make certain that F13 fits flush with fuselage sides, and then tack glue former into position at all tab and notch locations. 12.
  • Page 12 15. Battery hatch assembly: Locate the 1/16” balsa parts H1 and H2 (assembled in step 1). Align H1 atop H2 using the scribe marks on H2 and vent hole in parts to assist with proper centering of H1. While holding the hatch assembly flat on your work surface proceed to wick liberal amounts of thin CA between parts.
  • Page 13 17. Complete assembly by installing the second neo. magnet within the assembled catch. VERY IMPORTANT: Magnets are polarized. They will attract with great force and will likewise repel each other with great force if one of the poles is reversed. Check to see that magnets stick to each other. Tip: Mark contacting faces with permanent marker.
  • Page 14 Wing General Construction Notes: This wing is of typical I-Beam construction with additional torsional strength derived from the trussed sub ribs. Each component precisely interlocks using the interlocking I-beam construction method developed by Stevens AeroModel. Throughout construction, we suggest dry-fitting all components, and using minimal amounts of glue at tab and notch locations only to hold parts together.
  • Page 15 Fill out the remainder of the wing by installing 1/16” balsa wing ribs R2, R3, R4, and 1/8” balsa rib R5 to the S1 spar web. Use the plan sheet as a guide for rib location. While not required, you may tack glue the wing ribs to S1 at as long as you do so only where the rib meets the notches in the lower spar cap.
  • Page 16 Key the 1/8” balsa T1 trailing edge to wing assembly. The notched trailing edge should seat flush with the bottom and trailing edge of the wing assembly ribs. With the trailing edge properly fit, tack glue the part to the assembly where it interlocks with each rib.
  • Page 17 10. Locate the 3/32” balsa W1 turbulator (W2 is smaller than W1 and lacks notches). W1 is notched on one side and should be installed to the forward most turbulator notch spanning all ribs. Next install two (2) W2 turbulators in remaining slots atop wing ribs. See illustrations below. VERY IMPORTANT: The top surface of turbulators W1 and W2 will fit flush with the top surface of ribs R1 and R5.
  • Page 18 12. Locate the second 3/32” balsa S2 spar cap strip and install to top side of spar web as illustrated below. 13. Bond the 3/32” balsa W7 leading edge re-enforcements to the notches in rib R1. W7 should make full contact and be centered to the 3/16”...
  • Page 19 16. Shape the leading edge. Grab your 400 grit sanding block and razor plane. Proceed to rough the leading edge of the wing round using your razor plane then follow up with a few swipes of 400 grit paper on your sanding block.
  • Page 20 Ailerons: Assemble two (2) ailerons as illustrated below from 1/8” balsa parts A1, A2, A3, A4, and A5. Use the plan sheet to reference part locations. The 1/8” balsa sheet labeled “SHAFT-04/12” contains the skinny vertical stick A6, and the long “Aileron Diagonal” sticks. With the balsa ailerons complete use the carbon flat bar stock you previously cut (Page 7, step 2 of “Tail Feathers”...
  • Page 21 Tail Skid Use the provided 1/32” music wire stock and cut/bend to shape as described on the plan sheet as described under the heading ”Tail Skid / Horizontal Stab. Retaining Bracket”. Next, gather the 1/32” plywood tail skid parts F14a, F14b, and F14c. With the required parts in hand, begin assembly by bonding F14b atop F14a. Note that F14a is scribed to assist with the proper location of F14b.
  • Page 22 Locate the provided 4-40 nylon bolts and, using a sharp razor blade, cut the bolt length down to 3/8”. The cut to length bolts will pass through the tail skid, then through the horizontal stabilizer and secure into the blind nuts that were installed within the fuselage at F11 as previously described in this text.
  • Page 23 Final Assembly Notes General information: Final assembly assumes that the builder has some degree of experience finishing ARF style models and will not be described in agonizing detail. Verify parts fit and hinge method: Prior to covering this model all components should be dry fit together, Pay close attention to the fit of the wing to the wing saddle in the fuselage and the fit of the vertical stabilizer to the fuselage assembly.
  • Page 24 Mount the wing: Retain wing to fuselage using four (4) #16 rubber bands two (2) on each side of the fuselage. Use fresh rubber bands prior to each flying session. Do not cross the rubber bands over the wing as this will prevent the wing from cleanly departing the fuselage in the event of a crash.
  • Page 25 THIS PAGE HAS BEEN PROVIDED TO SCHEME A COLOR SCHEME: © 2007 Stevens AeroModel. Page 25 of 33...
  • Page 26 © 2007 Stevens AeroModel. Page 26 of 33...
  • Page 27 The Pilots Guide to Precision Aerobatics An Aerobatic Instruction Guide by Scott M. Stoops About the Author A lifetime in aviation would be an accurate description of the involvement Scott Stoops has had in both the RC modeling world and full-scale aviation. He grew up in an aviation family, with his father being an airline pilot.
  • Page 28 Stevens Aeromodel - Precision Aerobatics The following are some of the many maneuvers that your Stevens Aeromodel aircraft is capable of performing. They are listed in an order that allows a normal progression towards aerobatic competency. This guide is intended as an introduction to precision aerobatics.
  • Page 29 notice small rolling tendency at the top of the loop as a result of torque. Compen-sate with aileron. As the model starts descending on the back side of the loop, reduce the throttle to avoid gaining too much speed (causing the loop to finish at a lower altitude than it began).
  • Page 30 maintain level. If the model is trimmed for zero “G” (a slight descent in upright level flight), the down elevator required for the inverted portion will be minimized. Roll to Knife-Edge As you pass through the inverted position, you have left aileron for roll, and down elevator to maintain a level flight path.
  • Page 31 Split-S The split-S is started from an upright level line (start high enough to complete a half loop towards the ground - without hitting it). Once established on the level line, reduce the throttle. Perform a half roll to the inverted position. Immediately begin a positive half loop down.
  • Page 32 The Hammerhead Turn Begin the hammer head turn from a level line with enough throttle to draw a long vertical upline – but not so much that the model climbs so high that it is hard to see. Execute a 1/4 loop up to a vertical line. Establish and correct for a good vertical line.
  • Page 33 SAVE 10%* When you purchase “Mastering Radio Controlled Flight” Use Coupon Code: 4T2T3IL3 I hope that you enjoyed reading this excerpt adapted from “Mastering Radio Controlled Flight” By Scott M. Stoops. Continue your mastery of radio controlled flight by purchasing the entire reference from www.stevensaero.com.