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Table of Contents
Summary of Contents for Slipso 400
- Page 1 Slipso400 August 17, 2006...
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Page 2: Table Of Contents
Contents 1 Introduction 2 Preparation 3 Wing Preface ..........Building . - Page 3 Prop selection ......... . . 7.3.1 6V Speed-400 can motor ....... . . 7.3.2 Brushless in-runner .
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Page 4: Introduction
Chapter 1 Introduction Designed as an introduction to the fun sport of club racing, the Slipso400 can accomodate speed-400 sized motors and battery packs up to 7 cell 2/3A configurations. The Slipso400 has a 6mm (1/4”) solid balsa wing covered with laminating film or fiberglass. The fuselage is made of balsa sheet, triangular stock and balsa-ply formers, subsequently covered in fiberglass using water-... -
Page 5: Preparation
Chapter 2 Preparation To make building the Slipso400 as efficient as possible, it’s recommended you have the following resources and tools at your disposal • Workbench of at least 1500 x 500mm (5’ x 2.5’) in size (for general building) •... -
Page 6: Wing
Chapter 3 Wing 3.1 Preface The Slipso400 wing will be taking the greater portion of all the forced felt by the plane while it’s wipping around the sky low and fast. The only other part on the Slipso400 that will feel the pressure in the same magnatude is the wing-mount bolt holders in the fuselage. -
Page 7: Shaping
• If required, trim the width of the two reinforcement balsa pieces to ensure that both halves of the wing match up accurately. • Glue and assemble the wing together, leaving it to rest on a sheet of plastic or laminating film and weigh down with books or other suitable weights to ensure that the wing does not warp while drying. -
Page 8: Reinforcements
3.2.3 Reinforcements The basic balsa Slipso400 wing covered with film will most likely suffice for normal speed-400 racing. For the purpose of safety and peace of mind, you may wish to consider applying a strip of CF tow or cloth along the underside of the wing across the span. -
Page 9: Covering
3.2.4 Covering There’s many choices of potential coverings that can be used for the Slipso400 wing. We have found the simplest and cheapest is to use a combination of 80 micron (3.0mil) and 40 micron (1.5mil) laminating film. The 80 micron film is used on the underside of the wing and provides yet more tensile strength for handling tight turns. -
Page 10: Fuselage
Chapter 4 Fuselage 4.1 Preface Building the fuselage isn’t a complex task however you’d be wise to take your time and it’s strongly recom- mended to use PVA or Alphiatic, this gives you the time to setup the join as well as providing a flexible bond that can tollerate less than perfect landings as well as high stresses. - Page 11 • Insert, glue and clamp F1. (Figure 4.3) • Insert but DO NOT GLUE BD1 and BD2 (Bottom Deck 2). They are used to ensure the airframe is correctly aligned at this point. We do not glue them in yet because we have to add the triangular stock first.
- Page 12 • At this point you need to commit yourself to installing the elevator servo. A typical 9g (0.3oz) class servo provides ample strength for a brushed speed-400 setup. Tape and hot-glue in the servo to the rear side of F3. (Figure 4.10) •...
- Page 13 Figure 4.10: Elevator servo installed Figure 4.11: Control guide installed Figure 4.12: Appling tristock to Figure 4.13: Top-front tristock top-rear Figure 4.14: Front of fuselage shaved to shape Figure 4.15: Rear of fuselage shaved to shape...
- Page 14 Figure 4.16: Spinner fitted and marked Figure 4.17: Nose sanded to smooth profile Figure 4.18: 2oz glass cloth on fuselage...
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Page 15: Tail
Chapter 5 Tail Building the tail for the Slipso400 is a fairly simple affair but it is very important to ensure that you build it square and keep the elevator hinge as slop free as possible (not too difficult). • Join the elevator to the horizontal stab with masking tape (Figure 5.1) •... - Page 16 Figure 5.3: Elevator folded over Figure 5.4: Beveled elevator Figure 5.5: Elevator after shaping Figure 5.6: Test fitting the tail • Glue the tail together and keep it flat and square. • Glue the tail unit together after the fuselage has been glassed and sealed.
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Page 17: Final Assembly
Depending on the motor used different installation methods will be required. • Use 5.5˜6mm x 2.3mm metric screws directly through F1 for the Speed-400. Make sure you strengthen the balsa supporting the screws by CA’ing them and allowing to soak for 15 minutes. - Page 18 Figure 6.1: Motor mount made from two layers of 1.5mm (1/16”) balsa...
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Page 19: Flying
Chapter 7 Flying 7.1 Control surface setup 7.1.1 Elevator If you have the ability on the transmitter, it’s recommended to have either dual-rates or expo-rates setup for the Slipso400 elevator. During normal flight there is very little movement required, however on landing approach with power off it’s often useful to have a lot more elevator movement to facilitate washing off speed. -
Page 20: Li-Poly
• On 7 cell NiMh or 2S lipo configurations an APC 4.75x4.75 is a good starting point. • On 3S lipo an APC 4.2 x 4.5 would be more ideal, be aware though that nearly all brushed speed 400 motors are not really designed to withstand such voltages. - Page 21 • Approach the landing from at least 15m (45’) high as you perform the final turn from about 50˜70m (150’) down wind. • Kill the throttle just as you commence the final turn to line up with the landing strip. As you turn the high attack angle on the turn will cause the Slipso400 to wash off a lot of its speed.
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Page 22: Beyond Here
After you have mastered the Slipso400 you may well be looking for more performance, moving up from a standard brushed speed-400 motor to a Brushless in-runner will provide the single most dramatic improvement in performance. Take care when upgrading to brushless to ensure that your airframe has been built to handle the extra stresses. -
Page 23: Web Sites Containing Further Details On Various Build Processes
Chapter 9 Web sites containing further details on various build processes. • Using laminating film to cover wings. – http://www.pldaniels.com/flying/balsa/using-laminating-film-for-models.html • Using laminating film to cover tails. – http://www.pldaniels.com/flying/balsa/laminating-model-aircraft-tails.html • Video demonstrating covering with laminating film – http://www.pldaniels.com/flying/balsa/videos/playflash.html?video=laminating-film-covering&pp=balsa • Using hotglue and carbon fiber tow for reinforcements –...
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