J&H P-30, Manual

Page 1: ...J H Aerospace Saturno V3 6 P 30 Endurance model By www jhaerospace com Alexandre Cruz s contest winning P 30 optimized for laser cut precision assembly ...

Page 2: ...open flame 1 Parts list Before beginning construction please verify that your kit contains all of the necessary parts listed below and shown in Figure 1 and 2 Please be aware that some of the laser cut parts may have separated from their carrier sheet so you should ensure that all of those parts are present and undamaged 1 Full size plans 2 Parts Sheet 1 Longerons and spars 1 8 balsa 3 Parts Sheet...

Page 3: ... block and CA accelerator if using CA glue will be helpful The glue stick or nitrate dope is used to attach the tissue to your flying surfaces Builders who suffer from allergies to nitrate dope may choose to use Eze Dope instead however we have found that nitrate remains the best option for long term durability Straight pins or better yet entomology pins are very useful in holding parts down durin...

Page 4: ...the plans Begin building by laying out the fuselage sides as shown over the plans For best results build the second fuselage right over the first This method will require you to separate the sides later using a razor blade but it provides virtually identical fuselage sides ...

Page 5: ...egin adding cross pieces to join them together as shown If you stagger the cross piece stations relative to the jig frames you can avoid gluing the fuselage to the jig The jig is not the full length of the fuselage so you will need to slide it down the fuselage as you progress with adding the cross pieces Don t forget to add the sheeting at the nose Once it is added the fuselage will stiffen consi...

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Page 7: ...to slide the fuselage completely out Join the rear of the fuselage together and add the rear gussets long thin triangles and cross pieces as needed Some of the rear cross pieces may need to be cut down to length Assemble the wing pylon as shown Do not attach it to the fuselage at this time ...

Page 8: ...with the curvature of the top of the pylon Cut a pair of long lengths of 1 32 piano wire and press them into the front and back of the pylon as shown securing them with thin CA glue These will serve as the rubber band anchors for holding your wing in place ...

Page 9: ...the extra slot they have at the main spar to accept the plywood joiners You may notice that the ribs have large wedges on them These wedges support the leading and trailing edge to achieve the correct conformity to the design undercamber Do not glue the trailing edge to the wedge as it will be cut off using a razor blade after assembly The same is true at the leading edge You may find it helpful t...

Page 10: ...ribs are installed Lastly the spars are added You will need to flip the panel upside down to add the bottom spar Note that many of the spars are keyed to the wing and must be oriented correctly The top and bottom spars are different to allow for dihedral ...

Page 11: ...Next the right inner panel is assembled in the same manner The dihedral mating faces should be sanded for a good match The outer panels only use one dihedral gage ...

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Page 13: ...added after the spars are installed Sand them to a smooth transition as shown after assembly This is also a good time to give all of the wing parts a careful sanding You can leave the undercamber supports in place for now or cut them out as you sand the wing panels ...

Page 14: ...Locate the plywood wing joiners and match them to the dihedral breaks You can glue each joiner to a wing panel before beginning to jig the panels into place ...

Page 15: ...Once you have finished joining the wing panels and sanding the dihedral breaks and removing the undercamber wedges your wing is complete ...

Page 16: ...ab over the plans as shown You may wish to sand the leading and trailing edges prior to assembly The lower stab spar is added after assembly Finally the stab tips are installed and sanded to match the overall profile ...

Page 17: ...lined section will both lighten your model and provide better yaw response Wait until after covering to attach the fin to the fuselage We chose to finish our fin with Minwax spar varnish however you could also dope tissue onto the fin to seal it Assemble the nose block and sand it to match the fuselage This is also a good time to sand the fuselage so that it has no rough edges to disturb the cover...

Page 18: ... reinforcements inside the fuselage as shown The stabilizer leading edge is held down using a Shocer style slotted mount It is assembled from a layer of plywood and a layer of 1 16 balsa as shown Attach it to the fuselage as shown ...

Page 19: ...tremely light adds a little more torsional stiffness than doculam and it won t rot like tissue To attach the mylar you would need to coat the flying surfaces with either Sig Stix It or thinned Weldwood It is not necessary to cover tissue over the mylar on the flying surfaces as the Saturno is not a particularly fast model and adding tissue over the mylar would just add unnecessary weight If you ch...

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Page 22: ... and insert it at the back of the fuselage as shown securing with thin CA as shown Also glue the vertical tail to the underside of the fuselage aligning it with the fuselage centerline The stab should now rubber band in place neatly as shown ...

Page 23: ...egrees of down and right thrust and install the prop shaft and propeller You can create a freewheeling bail using the techniques in the Technical Library at freeflight org or you can just bend the end of the shaft over at 90 degrees like we did ...

Page 24: ...n Note that the pylon is rubber banded to the fuselage Do not glue the pylon down yet Cut a piece of 1 8 aluminum tubing to size as shown It should be generous enough in length that if it slides to one side or the other a quarter inch or so it doesn t fall free ...

Page 25: ...Drill into the top of the fuselage below the stab trailing edge as shown to make a pilot hole for a 2 56 nylon incidence screw ...

Page 26: ...ead the screw into place The hole should be deep enough to allow the screw to be 3 8 long and be screwed all the way down maximizing your adjustment range Drill a hole in the left wingtip for the dethermalizer line ...

Page 27: ...Clip a small snap swivel into the hole in the wingtip Use a reliable fishing knot to secure the Spiderwire to the snap swivel as shown ...

Page 28: ...le of inches of slack in the line so that it does not pull the wing out of alignment Use a pair of needle nose pliers to flare the end of a piece of aluminum tubing as shown This will serve as a snuffer tube for a fuse dethermalizer If you are using a viscous damper or radio dethermalizer you will need to rig your own setup for the wing pop off mechanism ...

Page 29: ...Roll the tubing under a knife near the edge of your workbench as shown to cut off a length at the flared end ...

Page 30: ...Drill a hole into the front of the wing pylon as shown to receive the snuffer tube ...

Page 31: ...rely in place Insert and glue in place a length of 1 32 piano wire behind the snuffer tube as shown to secure the wing hold down band in line with the snuffer tube so that the band will be fully severed by the dethermalizer fuse ...

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Page 33: ...ghtly shorter than the inner width of the fuselage to make a sleeve for the rear peg A braided motor of 4 strands of 1 8 rubber will give you a solid climb and a very long motor run with the supplied propeller We have recorded a video detailing how to braid motors ...

Page 34: ...d on the plans or at a location you determine to be optimal for your flying style consider the location shown on the plans to be the forward CG limit as we have found that a surprising amount of incidence is required at this CG location Mark this pylon location on the fuselage and remove the wing so that you can carefully align the pylon and glue it permanently in place ...

Page 35: ...lubricate the motor with silicone oil and stretch the motor to 4 5 times its relaxed length while winding in the first half of the turns Do not expect your model to fly perfectly at first It will need subtle changes to make it fly well It may even have warps which need to be removed to get it to fly well In addition to the trimming video for the Saturno we have produced several videos on trimming ...