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Wheel Pants

 

 
Cement L-1 discs to the inside of pants and wheel shells. 
Allow to dry completely. Pierce or drill the center holes. It's 
handy to leave holes undersize, enlarging them when parts 
are complete. This allows holes to be shifted slightly for 
perfect alignment.

 

 
Trim shells from the plastic sheet, finishing them flat on a sandpaper block as 
shown. Cut the wheel well openings in the pants roughly to shape and finish to 
exact shape with sandpaper sticks. Make a flat sanding stick by cementing 
sandpaper to a popsicle stick and a round one from a round pencil or small 
dowel.

 
Insert four small pins through the outer shells as illustrated. 
These provide a firm stop for the inner shells to rest against. 
 
Apply a thin, even coat of Sigment to the inside of the lip of 
the outer shell and slide the mating inner shell in place.

 
Handles made of masking tape prevent gluey finger marks and make the parts 
easier to work with. 
When parts are completely dry, use a sandpaper block to smooth any sharp edges 
of wheels and pants. Cement eyelets in wheels, shifting the holes if necessary to 
prevent wobble.

 

Cowling Assembly

 
There is no trim line on the cowling and 
dummy motor. Just cut from the sheet 
leaving a small rim around the edge like 
the brim of a hat. Carefully trim the round 
center disc from the dummy motor. 
Remove the small lip at the trim line, 
leaving the center ring smooth and flat. 
Apply cement to one surface of each N-2 
and place one inside and one outside the 
cowling, sandwiching the center ring of the 
motor between them. Turn them cross 
grained, matching the square cutouts with 
each other and centering them in the 
middle of the cowling. N-2s should stick to 
the cowling AND TO EACH OTHER.

 
Cement two N-1s together, add stiffeners, and build up the 3/32"x3/16" spacing frame. Try the completed N-1 former inside the 
cowling. It must fit smoothly without forcing. If necessary, sandpaper the edge of N-2 or build it up with a paper strip to make a 
good fit. Then remove the former, apply cement to the edges and the front of the spacing frame, and fit it in place permanently. 
When thoroughly dry, trim away the overhanging plastic, and sandpaper the back surface flat on a sandpaper block.
 

Fuselage

 
Match the hardness of the longerons for the right and left sides. MAKE SIDES ACCURATELY, giving special attention to the 
nose and wing mounting areas.

Summary of Contents for Customaire SIGFF26 Classic Series

Page 1: ...mall scissors are the best tool for cutting out plastic parts While cutting hold parts so that the trim line can be seen clearly Double check with the instructions to BE SURE YOU ARE CUTTING ON THE RIGHT LINE The edges of the shells and the back surface of the completed cowling assembly can be finished flat and accurate to the desired line by rubbing them across a sandpaper block Go slowly and car...

Page 2: ...essary to prevent wobble Cowling Assembly There is no trim line on the cowling and dummy motor Just cut from the sheet leaving a small rim around the edge like the brim of a hat Carefully trim the round center disc from the dummy motor Remove the small lip at the trim line leaving the center ring smooth and flat Apply cement to one surface of each N 2 and place one inside and one outside the cowli...

Page 3: ...y 7 shock strut strips from typewriter paper Also cut two 1 1 2 squares from wax paper Wrap a lower strut in wax paper and then wrap a paper strip snugly around the outside thoroughly cementing the layers of paper together as you wrap When cement has started to set up the wax paper will allow the shock strut to be slipped off the form Discard the wax paper When shock struts have dried completely t...

Page 4: ...same Covering Cover all parts before final assembly Windshield must be added after the upper wing is in place Do not shrink or dope the wing or tail unless they are pinned down on a flat surface while drying Use Sig Lite Coat Dope only WING SURFACES MUST BE FREE OF WARPS OR THEY WILL NOT FIT PROPERLY IN FINAL ASSEMBLY Final Assembly Don t try to cement parts to the paper covering Wherever parts ar...

Page 5: ... trailing edges butt against the ends of the cross pieces S Insert the bottom tabs of the N struts into the slot between the double ribs in the lower wings The struts should fit against the ribs without distortion Struts can be moved forward or backward slightly in the slots or sprung a little for improved fit If wings are well aligned and struts still will not fit the struts will have to be trimm...

Page 6: ...enter line of the fuselage as shown in the drawing Right and left wing should look alike you shouldn t see the top of one wing and the bottom of the other The fin should point straight ahead and the stabilizer should be flat This does not mean that the stabilizer and the wing sit on the fuselage at the same angle The wing will be tilted upward more than the tail A model can be made to fly with twi...

Page 7: ... angle of the stabilizer by changing the thickness of the incidence block under it Lower the front edge or raise the rear edge See drawing But make SMALL changes 1 32 at a time If a change of more than 1 16 is needed go back and perform the Preflight checks again It s likely your Classic is incorrectly balanced tail heavy or the surfaces are warped Diving A model that darts quickly into the ground...

Page 8: ...of the shim behind the noseblock until power flights are smooth and free of stalling with 150 winds in the motor Don t wind the motor any tighter until the lower powered flights are under control Power On Turns Because of the effects of the rotating propeller models usually turn better in one direction than the other Your plans will say which way to circle Don t circle any tighter than necessary C...

Page 9: ... a more complicated two man operation but gives longer flights Before a motor can be safely stretch wound it must be lubricated Rub a few drops of Sig Rubber lubricant into the rubber AFTER the knot has been securely tied Use just enough to make the motor barely damp If it s too juicy it will splatter all over the inside of the fuselage Next make a strong wire hook like a teacup hook and lock it V...

Page 10: ...technical support 1 641 623 0215 SIG WEB SITE www sigmfg com Copyright SIG Mfg Co Inc SIG MFG CO INC Montezuma Iowa 50171 0520 LIMIT OF LIABILITY The craftsmanship attention to detail and actions of the builder flyer of this model airplane kit will ultimately determine the airworthiness flight performance and safety of the finished model SIG MFG CO s obligation shall be to replace those parts of t...

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