Arizona SOMMER MONOPLANE Assembly Manual Download Page 1 | Manualshive

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Model Aircrafters

Sommer Monoplane

Assembly Manual

1/4 Scale

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Summary of Contents for SOMMER MONOPLANE

Page 1: ...NA RIZ A Model Aircrafters Sommer Monoplane Assembly Manual 1 4 Scale ...

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Page 3: ...dded litho plate to the front of the fuselage sides as it appears the original Sommer had metal sides Color choices are also optional As stated in many publications the fabric covering was a linen or cotton type and the color ranged from white to buff to brown Both of the Sommer prototypes have been flying very successfully for years Zenoah 23 s power them It is my engine of choice Never in the hu...

Page 4: ... edge using the cardboard template Lightly sand where the other pieces are glued to the aluminum After it is shaped attach a section of 1 8th inch hardwood dowel trailing edge and add the gusset Do this on a flat surface over the plans Next add the two larger ribs to the 1 8th inch vertical aluminum pivot spar and the 1 8th inch hardwood vertical spar Frame over the plans on a flat surface and glu...

Page 5: ...ake hinge slotting easier I spaced the center section of the layers to accommodate the hinges later It is necessary to shim with some scrap 1 32 ply in these slots for a good fit of the hinges The leading edge of the elevator is made like the trailing edge of the stab The trailing edge of the elevator is 1 8th inch dowel Slot the x 3 16 inch balsa pieces for the control horn rib After laying up a ...

Page 6: ... trailing edge material The ends of the cap strips are cut and sanded after the wings are layed up Because the root rib is cut from the same pattern as the main ribs it too needs to have cap strips added It can be capped by hand The small outboard rib is glued into place and capped after installation of the wing tip Carefully slide all the main ribs into position on the two main spars allowing eno...

Page 7: ...ing edge The tip rib is aligned and glued into place on the aluminum tip material and then capped after in place Some adjustment may be necessary for this fit Working aft to the trailing edge gently compress the tubing just before the rear of the tip rib to blend with the end of the rib and the thickness of the trailing edge material Do this gently with pliers It doesn t take much Do not worry abo...

Page 8: ...to blend in with the top and bottom of the rib cap Using the 1 16 in plywood stock 6x12 in cut pieces to glue on the front and back of each spar and balsa filler blocks When done carefully drill a 1 8th inch hole from top to bottom centering the hole in the spar and keeping it vertical as well A piece of 1 8th inch brass tubing is then cut and glued in these holes The wing rigging bolts go thru th...

Page 9: ...lued sometimes it was nailed on Wooden battens were also used and nailed in place Stitching as we know it was also used but as to just when and on what aeroplanes remains a bit of a mystery Some of the best sources I surveyed about the Sommer monoplane agreed that rib stitching was probably used on all ribs except the first four inboard ribs The four inboard ribs had wooden battens nailed over the...

Page 10: ...hey move up and down in the axle guides Note Cut a slot with your Dremel emery wheel or a file as shown in the photo before wrapping and soldering That makes it much easier to drill thru this spot for attaching the gear cables later Do not neglect doing this as it is very difficult to drill between the wire rods Notice that the brass tab wraps all the way around the strut and cross piece when sold...

Page 11: ...ting the axle may be fitted It is placed thru the guides after the brass ends are soldered in place Wheel collars or soldered washers keep the wheels away from the guides Drill a hole to accept either a cotter pin or hitch pin to retain the wheels Use the supplied medium size turnbuckles for rigging the landing gear assembly Photo 6 shows the completed undercarriage All that is left is to add whee...

Page 12: ... to cut these holes before installing F3 Refer to the photos to see the position of these items The bottom edge of the servo opening is about 3 8th up from the bottom edge of F3 The vertical cut is for the elevator bellcrank The mount for the bellcrank has been cut from scrap bin ply It sits over the opening cut for the wing warp servo Photo 3 shows the cockpit side of F3 with a servo in place Rei...

Page 13: ... of the fuselage A slight bevel is required on the inside of the longerons and vertical pieces at the tailpost Do not bevel too much however as the space for the 2 56 blind nut for stab mounting is limited Note in photo that some routing had to be done to fit the blind nut in Less of a bevel makes it easier to fit the blind nut later Next glue in all of the 1 16 inch hardwood dowel cross braces fo...

Page 14: ...the longerons Note the position of the wing mounting spar holes that will be drilled in the fuselage sides after the F19 outer skins of 1 32 inch ply are glued into place The spars extend from the root rib of the wing panels and fit into these holes when the wings are mounted and rigged The inch rear spar hole is drilled just ahead of bulkhead F3 and just under the rear hardwood block Make sure th...

Page 15: ...ank I like the Nelson bellcranks The cables from the rudder control horn are hooked up directly to the servo arm of the servo The position of the wing warp servo keeps it low to the cockpit floor and directly over the wing warp bellcrank mounted on the lower pylon Access to this servo is somewhat limited after a pilot and seat are installed so use a good quality servo I use the new socket head ser...

Page 16: ...sary and fit into the holes but do not glue into place Next drill thru the brass gussets to accommodate the forward brace wire and the 1 72 bolts Fasten the brass gussets to the bottom of the V with the 1 72 brass machine screws and nuts Again position the V brace into the hardwood blocks making sure it is centered and in a vertical position Place the front brace wire thru the brass gussets allowi...

Page 17: ... tube across the fuselage as shown on the plans and in the photo The wire stabilizer braces are inserted and glued into these tubes later With the rudder stabilizer and elevator temporarily attached you may now route the control cables so as to get the most direct clear route with the cables to the control horns In spite of all the cross braces there is a route where the cables should clear all of...

Page 18: ...trength and appearance You may then bend the ends of the wire in to form the foot portion With the thin piece of brass material form a strap and bolt the skid to the pylon as shown in the photo A hook is affixed to the upper end of the skid for attaching the bungee cord Use leftover 1 16 in wire A scrap piece of square stock can be notched and glued across the front legs to act as a stop If you fl...

Page 19: ...instrument panel pilots seat and pilot are added Be careful with the positioning of the pilot seat etc so as to clear all control cables I have used full figured pilots with an additional bellcrank attached to a control sick to make the pilots arms and hands move with plenty of space It just takes some planning Reference the cowling sheet and dummy motor page for construction procedure Here is a c...

Page 20: ...achment of the control cables using two of the smaller size turnbuckles The stabilizer is mounted first by securing the three 2 56 bolts up thru the bottom of the stabilizer platform Use two in front and one at the rear With the supplied 1 72 nuts and bolts attach the brass tabs to the positions on the top of the stab They need to be bent upwards slightly to be in line with the brace rods The 2 56...

Page 21: ...tom tab Do this to both wing panels and establish some dihedral The amount is not critical as Sommers have been flown with from 1 3 inches Add the shorter length wires and adjust Next add the upper wires that go thru the pulley from one wing panel to the other Adjust the length of these to add just a bit of washout to the entire panel Now you may add the main flying wires to each wing panel Both t...

Page 22: ...lot figure for storage and transportation Control Throws A minimum or wing warp is required Set up your transmitter to produce only about 1 inch of vertical movement at the outer trailing edge The up elevator throw is limited by the bottom edge of the rudder It is plenty If you need more raise the rudder slightly A generous amount of rudder throw helps with ground control and yaw To properly execu...

Page 23: ...Flying photo Finished Sommer 2 photo ...

Page 24: ...ZONA MODELAIRCRAFTERS A registered tradename of Digital Design LLC 13814 N 56th Place Scottsdale Arizona 85254 SHEET 1 of 1 SCALE OUTLINE DRAWINGS ARE SHOWN AT 2 1 SCALE Copywrite 2005 by Arizona Model Aircrafters a registered tradename of Digital Design LLC NA RIZ A Model Aircrafters www arizonamodels com ...

Page 25: ...per Tube Wire Support Paint White Dash Instruments GENERIC ASSEMBLY DIAGRAM CONTENTS VARY BY MODEL ARIZONA MODEL AIRCRAFTERS SHEET 1SCALE OUTLINE DRAWINGS ARE SHOWN NOT AT SCALE Copywrite 2000 by Arizona Model Aircrafters a registered tradename of Prototype Production and Engineering inc N A RIZ A AIR SPEED Km hr AIR SPEED Km hr AMP C D OIL KG CM 2 20 40 60 80 VOLTS 6 1 2 3 4 5 AZM 220 OIL AMP VOL...

Page 26: ...7 Cylinder Rotary All Scales Gnome ...

Page 27: ...e part B later Gnomes had the cylinders rotated placing the pushrods to the rear photo to protect the mechanism from flack and gunfire Note Additional parts B and F are to provide additional spacing to match different engine profiles and to help in obtaining the correct centerline spacing Use as necessary 1 4 Scale Spacing 15 16 part E to Firewall A B1 B2 C H G D E F1 F2 Cylinder head and rocker a...

Page 28: ...as an additional piece of AL tubing installed to simulate the rod sleeve Pushrods on early Gnomes were installed to the front Check your scale documentation for the correct method of assembly Step 3 Gnome Aircraft Engine ALL SCALES CONSTRUCTION DIAGRAM ARIZONA MODEL AIRCRAFTERS A registered tradename of Digital Design LLC 13814 N 56th Place Scottsdale Arizona 85254 SHEET 2 of 3 SCALE OUTLINE DRAWI...

Page 29: ...254 SHEET 3 of 3 SCALE OUTLINE DRAWINGS ARE SHOWN AT 1 1 SCALE Copywrite 2006 by Arizona Model Aircrafters a registered tradename of Digital Design LLC A scale kit shown mounted around a G 26 Make sure all parts are secured to together so that loosed parts can not fall off and hit the propeller scale Sommer Monoplane NA RIZ A Model Aircrafters www arizonamodels com ...

Page 30: ...Vintage Wheel Assembly Directions ...

Page 31: ...re the exact diameter of the rim and using a compass draw a circle on the plywood Drill the exact center use a drill press if possible Make sure the center wire is perpendicular to the surface of the plywood Center the rim and pin in place then slide the hub assembly over the center wire and you are ready to lace the wheel SHEET 1 of 4 NA RIZ A ARIZONA MODELAIRCRAFTERS A registered tradename of Pr...

Page 32: ...side Check that the rim is concentric to the hub when satisfied solder and trim the ends Hint To check the concentricity before soldering the spokes at the rim Take the rim and spin it on a piece of wire Gently press it true before soldering the rim 1 1 2 2 3 3 1 2 3 First layer Second layer SHEET 2 of 4 NA RIZ A ARIZONA MODELAIRCRAFTERS A registered tradename of Prototype Production and Engineeri...

Page 33: ...luded Scale Music Wire Rim Hole Scale valve stems can be made from the same section of tubing mentioned above with a pin mounted Valve Pin Rim Drill Hole Note Spoke material is not included as a standard part of the kit Depending on the type of wheel you are making there are several options For most applications WWI you can use music wire available at any hobby shop and Michael s Craft stores in t...

Page 34: ...12 balsa Front stab trim 1 1 2 x 1 x 12 balsa Rear stab trim 1 3 8 x 1 x 12 balsa Front stab trim Stabilizer Elevator Rudder 2 3 16 x 36 hardwood dowel Leading edge and sides 6 1 16 x 1 2 x 36 hard balsa Stab T E elevator L E 3 1 8 x 1 4 x 36 medium balsa Rib stock 4 1 8 x 36 hardwood dowel Rudder TE spar cross braces elevator T E 1 1 4 x 1 x 12 balsa Gusset stock 1 3 16 x 1 2 x 12 balsa Control h...

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Page 36: ...NA RIZ A Model Aircrafters www arizonamodels com Cw2006 by Arizona Model Aircrafters a registered tradename of Digital Design LLC 13814 N 56th Place Scottsdale AZ 85254 ...

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