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SIG CAP 231EX Скачать руководство пользователя страница 9

MOUNTING THE  COWL

Before mounting the cowl, carefully inspect its inside rear edges.
Use sandpaper to smooth the inside rear surface of the cowl, 
making it free of any bumps or ragged edges that may scratch or
dent the fuselage when pressed in place. Also, make sure the four
mounting holes are open and free of any debris.

❑

1) Carefully fit the fiberglass cowl in place over the engine and 

back onto the fuselage. The head of your engine will likely 
fit inside the cowl. If it does not, you will now need to open 
the cowl cheek, allowing clearance of the head, rocker arm
cover or whatever else may be contacting the inside of the 
cowl. This is largely a matter of carefully observing where 
the engine part is contacting the cowl and then marking that 
location on the cowl with a felt marker. Remove the cowl, 
and use a Dremel® Tool to make a small hole in the cowl 
at the point of contact. Refit the cowl, checking the hole 
location and size, adjust as needed and again use the 
Dremel® Tool to work on the opening.

This method is 

referred to as "sneaking up" on the opening, making a 
perfect clearance hole. A handy tool for this job is a small 
penlight.

The penlight can be used from the inside or 

outside of the cowl to highlight and spot required hole 
locations. We suggest using a clearance distance rule of 
thumb of at least 3/16" from the cowl to any engine part.

❑

2) Once the cowl is in place without any part of the engine 

contacting it, push the cowl back onto the fuselage until the 
engine prop mounting flange emerges from the front 
spinner ring. This flange must clear the front of the cowl by 
at least 1/16".

❑

3) Slip the spinner backplate in place over the engine prop 

shaft, pushing it all the way back to the prop mounting 
flange. Mount a prop or prop stub "dummy" in place on the 
drive shaft, followed by the thrust washer and retaining nut.
Tighten this assembly sufficiently to bring the spinner 
backplate firmly in place against the prop mounting flange.

❑

4) We suggest mounting the cowl with a 1/16" space between 

the back of the spinner and the cowl. This allows for small 
thrust adjustments, if desired. Use scrap pieces of 1/16" 
plywood to space the cowl behind the back surface of the 
spinner backplate. Center the spinner backplate to the cowl 
and use masking tape to hold it securely in this position.
Use masking tape to secure the back of the cowl to the 
fuselage, leaving the four pre-drilled mounting holes 
uncovered. With the cowl securely in place, it is in position 
for mounting to the fuselage.

❑

5) Use a 7/64" dia. drill bit to drill holes through the fuselage, 

centered in each of the four holes in the cowl (1 hole on 
each upper right and left sides of the cowl and 1 hole on 
each bottom right and left sides of the cowl). From your 
parts bag, locate two (2) 1/8" x 3/4" sq. plywood plates, four 

(4) 4-40 x 1/2" nylon bolts and four (4) 4-40 blind mounting 
nuts. The two 1/8" x 3/4" sq. ply plates will be glued to the 
inside of the fuselage at the upper right and left hole 
locations, directly over the holes just drilled. Hold one of the 
ply plates in place, flat against one of the upper inside cowl 
mounting holes and use a sharp pencil, from the outside, to 
make a mark on the plate. Remove the plate and use a 
5/32" dia. bit to drill a hole through the plate at the mark just 
made. Apply epoxy glue to one of the 4-40 blind nuts and 
insert it into the plate, pressing it firmly in place - wipe off 
any excess glue. Apply glue to the face of the ply plate and 
hold it in place inside the fuselage. Before pressing the 
plate in place, run one of the 4-40 nylon bolts through the 
cowl and into the fuselage. Engage the bolt into the threads 
of the blind nut, mounted in the ply plate. Thread the bolt in 
place, tightening it until the plate is firmly in place against 
the inside of the fuselage. Repeat this procedure to secure 
the opposite side of the cowl with a nylon bolt, plate and 
blind nut.

❑

6) The two bottom cowl holes are handled in a similar manner 

but without using plywood plates. Apply epoxy glue to one 
of the 4-40 blind nuts and insert it into one of the bottom 
inside cowl hole locations. With the fuselage flat against 
your workbench, use pressure to seat the nut firmly into the 
plywood. Wipe off any excess glue and repeat the process 
with the remaining blind nut and cowl mounting hole.

❑

7) Use the four nylon 4-40 x 1/2" bolts supplied in your kit to 

secure the cowl to the fuselage from the outside. Remove 
all masking tape, the 1/16" plywood spinner/cowl spacer, 
the retaining nut, prop and spinner backplate. Check your 
work and remove the cowl from the fuselage.

❑

8) An opening must now be made in the bottom of the cowl.

This opening is absolutely necessary to allow incoming air 
to properly flow through and exit the cowl. Without this 
opening, your engine will overheat and quit.

If you are 

using a 2-stroke engine, such as the Irvine 1.20 or 1.50 or 
a 4-stroke, such as the Saito 1.20, 1.50 or the 1.80, we 
suggest using an opening, which measures 4-1/8" wide by 
7" deep. This size opening allows the exhaust pipes on 
the recommended SIG muffler for the Irvine engines to 
clear the cowl with plenty of additional air exit area, as well 
as allowing plenty of air for 4-stroke engines. This opening 
may certainly be "customized" for your particular 
engine/muffler set-up, as long as there is sufficient air exit 
area.

Stand the cowl upright on its rear edge, nose up, with the 
bottom side facing you. You will need a ruler, a 90° triangle 
and a fine point  non-permanent felt marker pen to mark the 
cowl for cutting. The approximate width of the bottom rear 
edge of the cowl is 6-1/2". Make a mark at the center of the 

9

Содержание CAP 231EX

Страница 1: ... loss of control You should use heavy duty ball bearing servos with at least 65 inch ounces of torque or more to drive the ailerons elevator and rudder If available use a servo with metal gears instead of plastic Specifically in our prototype models we used Airtronics 94731 servos for the ailerons elevators and rudder This is a dual ball bearing servo rated at 80 inch ounces of torque Another good...

Страница 2: ...litter cables we found that clear silicon adhesive works great These assembly instructions will be specific regarding adhesives While we all have our own preferences we would urge you to give careful consideration to these suggestions KIT CONTENTS The following is a complete list of every part included with your CAP 231EX ARF kit This kit was packed and inspected at the SIG factory Each part has b...

Страница 3: ...ves require three 3 hinges each and the rudder uses three 3 hinges for a total of 17 hinges and hinge pins These are provided in a separate bag in your kit Begin by using a hobby knife to completely open up and clear each pre slotted hinge openings These slots need to be 1 wide to accept the width of the hinges and about 5 8 deep on each side Next use a short length of thin saw blade material such...

Страница 4: ...ng part as possible while still having full left and right or up and down movement ability Again use alcohol and a cloth to carefully remove all excess glue Flex the flying surface to be sure it moves freely Tape the part in place and move to the next surface to be hinged WING ASSEMBLY The wing panels have been carefully built sanded and covered at the factory The dihedral angle has been already b...

Страница 5: ...out touching the slot s edge about 1 32 clearance is adequate With the servo now in this position use a sharp pencil to mark the hatch with the locations of the servo mounting blocks Remove the servo from the hatch and apply thick CA or 5 minute epoxy the to bottoms of the servo blocks and glue them in place to the hatch again checking for output arm clearance Place a weight onto this assembly and...

Страница 6: ...e 30 minute epoxy to install the two front locating dowels into the front wing plate leave 1 2 of dowel exposed to engage the corresponding fuselage mounting holes Use plenty of glue and a stick to get it into the two holes before inserting the dowels Visually be sure these dowels are straight in the wings and not at angles With the dowels in place stand the wing up on its leading edge and allow t...

Страница 7: ...wo 4 x 3 8 sheet metal screws Repeat this process on the opposite aileron 16 Make the aileron pushrods by first soldering a 4 40 solder clevis to the unthreaded ends of the two 4 40 x 2 3 4 steel pushrods Thread a 4 40 hex nut onto the threaded end of the pushrod followed by a threaded clevis Connect the solder clevis end of the pushrod to the aileron servo output arm Holding the pushrod in place ...

Страница 8: ... from the front face of the prop drive flange back to the firewall This is the distance your engine needs to be from the firewall for cowl mounting and prop clearance purposes Mark your engine s mounting lug bolt hole locations onto the motor mount arms and remove the engine 7 Note that we have supplied you with most of the hardware needed to assemble this kit with the exception of engine mounting...

Страница 9: ...and left sides of the cowl From your parts bag locate two 2 1 8 x 3 4 sq plywood plates four 4 4 40 x 1 2 nylon bolts and four 4 4 40 blind mounting nuts The two 1 8 x 3 4 sq ply plates will be glued to the inside of the fuselage at the upper right and left hole locations directly over the holes just drilled Hold one of the ply plates in place flat against one of the upper inside cowl mounting hol...

Страница 10: ... onto the fuselage over your engine In this step you will determine the location for the hole required for your engine s needle valve to exit the cowl This is easiest done using the penlight mentioned earlier in step 1 and fine line marker pen First find the approximate location of where the needle valve will exit by looking carefully at your engine s carburetor Mark that location onto the cowl No...

Страница 11: ...your particular engine If required shaft spacers are included If your engine shaft is larger than the hole size in the spinner it can be drilled to fit This should be done using a drill press Slip the base plate onto the shaft Slip the propeller onto the shaft and secure it with your engine s nut and washer Snap the spinner nose cone in place into the base plate channels and use the four mounting ...

Страница 12: ...the axle end of the wire If the wheel is a tight fit use a 7 64 dia drill bit to open the axle hole a little The remaining 2 washer will be soldered in place to retain the tailwheel To protect the plastic wheel hub use a scrap piece of 1 32 plywood over the axle and against the wheel Slide the washer in place against the plywood and solder it in place remove the plywood spacer The completed tailwh...

Страница 13: ...rt small part with one rounded end with a hole for the tube the pushrod connector assembly 3 16 hex brass body nylon retainer and 4 40 x 1 8 socket head cap screw and the 2 56 solder clevis Drill a 1 8 dia hole through the firewall aligned with your engine s carburetor throttle arm From the front insert the 1 8 nylon tube through the firewall and into the fuselage leaving 3 exposed in front of the...

Страница 14: ...overing material just inside of these two lines including where it contacts the fuselage at its leading and trailing edges 14 In this step you will prepare the horizontal stabilizer for mounting by first checking it s alignment with the wing and fuselage Start by using the three M4 x 25mm bolts provided to mount the landing gear to the fuselage Bolt the wing in place Attach a Robart Incidence Mete...

Страница 15: ...d of the cable Press the heat shrink tubing in place over the aluminum tube and use heat to shrink it in place Thread a 4 40 hex nut completely onto the rigging coupler followed by a 4 40 R C link Center the link approximately onto the rigging coupler threads Repeat this process on the remaining length of cable These two prepared ends will be located at the rudder Feed the bare end of the cables i...

Страница 16: ... and use a standard Y harness with 12 extensions or use the Miracle Y elevator splitter to obtain mirror image elevator action Install the splitter cables through the back of the canopy hatch opening back to the two elevator servo cutouts To avoid a clutter of cables and to keep them away from the pull pull cables route the extensions through the upper rear fuselage Connect the servos to the exten...

Страница 17: ...these areas Fit the fairing pressing it firmly in place to make sure it contacts all gluing areas Clean up any excess glue with alcohol and use tape to secure the faring in place Allow the glue to cure 23 Apply petroleum jelly to the elevator hinge knuckles and apply epoxy to the exposed hinge halves Attach the left and right elevator halves to the stabilizer wiping off any excess glue from the hi...

Страница 18: ...l collar With the set screw pointing straight down tighten the set screw enough to temporarily retain the wheel 2 With the wheel pant slots facing inward fit the pant in place over the wheel if necessary loosen the wheel collars to reposition the wheel to fit into the pant The pant slot should accept the axle hex nut If not rotate the hex nut with a wrench until the pant slides in place This is ho...

Страница 19: ...surface of the canopy base Use a sharp single edge razor blade to cut 1 4 off of the length of each bolt If desired the canopy base can now be detailed On our prototypes we used light gray art paper to line the bottom and back of the canopy base giving it depth and color We measured and cut the paper to fit and applied it to the base with a heavy coat of spray cement We used a commercially availab...

Страница 20: ...witch and battery connections to the receiver are now made The aileron Y harness stays plugged into the receiver aileron channel receptacle with the two connecting ends hanging loose for wing attachment Turn the radio system on and check the functions of the throttle elevator and rudder servos These should all now be centered and working perfectly without any binding Correct any such problems now ...

Страница 21: ...he actual model These will help you understand where the decals are to be placed When placing the striping tape guide on the fuselage have the cowl in place and the rudder taped to neutral Once the striping tape is placed along the entire length of the fuselage rudder and cowl carefully cut the tape at the rear edge of the cowl and remove the cowl The checkers will be applied to the cowl off the f...

Страница 22: ...e engine propeller shaft and the other end over the tailwheel bracket Hang the model from the ceil ing or a rafter leveling it in side view With the model secured in this way observe the wings Ideally they should be level without one wing lower than the other If one panel is lower it means that it is somewhat heavier than the other When flying the model this uncorrected imbalance may cause the mod...

Страница 23: ... Assuming you re comfortable and getting used to the airplane take it to a safe altitude and throttle back to get a feel for the slow flight and stall characteristics Properly balanced and trimmed your CAP should demonstrate fairly sedate no fuss stall characteristics Once flying speed and up elevator input is bled off the CAP should just drop its nose and resume flying as speed picks up All of th...

Страница 24: ...ampaign IL 61822 HANGER 9 HAN8275 and INSTRUMENT PANEL HANGER 9 HAN177 MIRACLE Y ELEVATOR SPLITTER MAXX PRODUCTS and 815 Oakwood Road Unit D LARGE CAPACITY BATTERY PACKS Lake Zurich IL 60047 and Tel 847 438 2233 AFTER MARKET Y HARNESSES Fax 847 438 2898 INCIDENCE METER ROBART MFG INC P O Box 1247 St Charles IL 60174 CAP 231EX DOCUMENTATION SCALE MODEL RESEARCH FOTO PAAK 5444 3114 Yukon Avenue Cost...

Страница 25: ...of any form either model size or full size are not toys Because of the speeds that airplanes must achieve in order to fly they are capable of causing serious bodily harm and property damage if they crash IT IS YOUR RESPONSIBILITY AND YOURS ALONE to assemble this model airplane correctly according to the plans and instructions to ground test the finished model before each flight to make sure it is ...

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