SIG Mr. Mulligan SIGF23 Classic Series Instructions Manual Download Page 5

Tie a square knot in the rubber to make a loop. It's best to lubricate it with Sig Rubber Lube. The rubber is installed through the 
opening in the cowl and held in back with a 1/16" dowel.
 

Contest Tips

 
The Mr. Mulligan has had considerable success in contests, winning first place in the 1972 National Model Airplane 
Championships. Academy of Model Aeronautics rules require that you prove that your model is an accurate reproduction. "Proof 
of Scale" must include a three-view drawing of the real airplane and photographs. The April, 1972, issue of "Wings" magazine 
has excellent photos. A three-view and photos can be found in "The Golden Age of Air Racing", available for $4.00 from the 
Experimental Aircraft Association in Hales Corners, Wise. An excellent three.view of Mr. Mulligan is available from. Hal 
Osborne, 1932 Conejo Lane, Fullerton, California, for $2.50. 
 
A small three-view of Mr. Mulligan appears in the book "The National Air Racers in 3-Views 1929-1949" by Charles A. 
Mendenhall, available from The Diane Publishing Co., Box 2726, Rochester, New York, N. Y. 14626. Photos of Mr. Mulligan, 
taken at different times show differences in markings. Some photos show "40" on both sides of the fuselage but not on the wing 
tips. Later pictures show "40" also on the upper left and lower right wing tips. 
 
The plastic propeller provided in the kit is for general sport flying purposes. For contest use the special hand made propeller 
(parts not furnished) will give extra performance for experienced modelers. (See previous diagram) The propeller hook may be 
unfamiliar. It is designed to prevent the rubber from "climbing" the prop shaft and allows the use of rubber motors up to 33 
inches long. The model depends on a long motor run for its endurance. Typically it will fly fifty seconds fully wound. The glide 
with the contest propeller is poor due to the drag of the wide blades. This has not detracted from the model's winning ways, 
however.
 

Modifications

 
By adding a small plywood firewall to C2 the Mr. Mulligan will be quite well suited to the Brown Co2 motor. Mr. Muligan can be 
adapted to indoor scale by building a lighter structure. Reduce the size of the stringers to 1/32"x1/16". Make the wing spar of 
1/32"x1/16". Use only the lightest indoor wood. Use only one coat of clear dope or two coats thinned 50% with thinner. The 
contest prop should be used but without free-wheeling and with 1/32" plywood blades. The rubber size should be reduced and 
adjusted to the height of the ceiling under which you are flying.
 

Decals

 
Dip the decals in water for a few seconds, remove and allow the moisture to soak into the backing to completely loosen the 
glue. Don't slide the decal off too soon or it may tear. Slide about 1/4" of decal at the bottom over the edge of the backing and 
align on the surface. Hold the decal and carefully slide away the backing from underneath. Use a small paddle of 1/8" sheet 
balsa about 3/8" wide as a squeegee to remove excess water from under the decal. Hold down one edge with a similar paddle 
while squeegeeing to prevent the decal from being moved. Allow plenty of time for the glue under the decal to dry before wiping 
away the excess glue remaining on the surface of the model with a damp cloth. 
 
The decals are fuel proof with most fuels but will dissolve in dope or cement. Do not try to dope over the decals. Some types of 
clear fuel proofer may be used over the decals to increase durability but test them in advance before applying.
 

FLYING YOUR SIG CLASSIC

 
Now you are ready to fly your plane, and FLYING is what the Sig Classic models are designed for. Most models as realistic 
looking as your Classic make poor flyers. They're often tricky to adjust and clumsy in the air. But Sig's Classic kits give you 
three important features that assure you of successful flights: 

1. A PROVEN flyable design.  
2. A reliable way to make flight adjustments.  
3. Complete flying instructions. 

 
Read and follow these instructions carefully. They are the key to satisfying flying.
 

Testing And Adjusting

 
You have invested a lot of time and effort in building your model, don't waste it all now with careless testing. Most models fail to 
fly because of poor adjustment, not poor craftsmanship. Be as careful in your testing as you were in your building. 
 
Every model is a little different and needs its own special set of adjustments. Contest winning flyers make dozens, even 
hundreds, of test flights "trimming" a model for best performance. So don't give up if your first flights aren't perfect.

Summary of Contents for Mr. Mulligan SIGF23 Classic Series

Page 1: ...co The remains were recovered by an airline pilot in 1972 Construction of the model is generally conventional but there are a few unusual features to make it easier to build and stronger Please read these instructions carefully so that you do not overlook the unique features and make time consuming errors Figure A shows the uncovered structure Begin by building the fuselage wing or tail first as p...

Page 2: ... 32 sheet Neatness is essential so take your time in making sure the sheets fit well Patterns are shown on the plan for the sheets between F l and F 2T and F 2B The sheet covering between F 2B and F 3 is a straight wrap and doesn t require a pattern Bevel the edge of the planking where it passes over F 3 so that the covering will blend onto the bottom stringers neatly Add the tail wheel housing pa...

Page 3: ...ed for this job Put small dabs of glue on the parts of the wing panel that will contact the center section Then put the wing panel back in place over the plan Lift up the tip of the wing panel and slide a 1 4 sq piece of scrap balsa up to the outer W 5 ribs on each panel See wing spar drawing for dihedral details Be sure that the inner end of the wing fits neatly against the center section Don t u...

Page 4: ...appear and these are easily removed by twisting the warped surface opposite from the warp while holding over the spout of a steaming tea kettle Wear gloves as steam can give nasty burns Add strut attach fitting to underside of the wings Trim struts to proper length and install The struts will prevent further warping of the inboard part of the wing but if the wing is warped before you install the s...

Page 5: ...e stringers to 1 32 x1 16 Make the wing spar of 1 32 x1 16 Use only the lightest indoor wood Use only one coat of clear dope or two coats thinned 50 with thinner The contest prop should be used but without free wheeling and with 1 32 plywood blades The rubber size should be reduced and adjusted to the height of the ceiling under which you are flying Decals Dip the decals in water for a few seconds...

Page 6: ... to the nose or tail until it DOES hang level Don t be afraid to add the necessary weight CORRECT BALANCE IS MORE IMPORTANT THAN LIGHT WEIGHT Modeling clay makes handy balancing weight it can be pressed permanently in any corner Wire solder or BB shot can be used by cementing in place If one blade of your propeller always swings to the bottom a tiny smear of clay on the other tip will improve the ...

Page 7: ... cut the fin loose and re cement it at the desired angle When the glide is smooth and steady you are ready to go on to powered tests Power On Flight ALL ADJUSTMENTS TO THE WOUND UP PART OF THE FLIGHT ARE MADE BY POINTING THE PROPELLER AND NOSEBLOCK IN THE DIRECTION YOU WANT THE PLANE TO GO This kind of adjustment affects only the powered flight and will not upset the glide pattern you have develop...

Page 8: ... needs If your ship is huskier than average it may not climb even when fully wound In that case add one strand not a complete loop of 1 8 Sig rubber to the motor Tie an eye like a slip knot in each end This will provide the extra horse power needed for higher climb Whenever you add rubber re balance your model as outlined in the pre flight instructions Additional rubber tends to make a plane tail ...

Page 9: ...ability Good Flying SIG MFG CO INC is totally committed to your success in both assembling and flying the Mr Mulligan Should you encounter any problem building this kit or discover any missing or damaged parts please feel free to contact us by mail or telephone SIG MFG CO INC 401 7 South Front Street Montezuma IA 50171 0520 SIG MODELER S ORDERLINE to order parts 1 800 247 5008 SIG MODELER S HOTLIN...

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