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“builder of the model” rule does not apply. To receive the fi ve 
points for scale documentation, the only proof required that a 
full size aircraft of this type in this paint/markings scheme did 
exist is a single sheet such as a kit box cover from a plastic 
model, a photo, or a profi le painting, etc. If the photo is in 
black and white other written documentation of color must be 
provided. Contact the AMA for a rule book with full details.

If you would like photos of a full-size Pitts M-12s for scale 
documentation, or if you would like to study photos to add 
more scale details, photo packs are available from:

Bob’s Aircraft Documentation

3114 Yukon Ave

Costa Mesa, CA 92626

Telephone: (714) 979-8058

Fax: (714) 979-7279

www.bobsairdoc.com

PROTECT YOUR MODEL, YOURSELF 

& OTHERS… FOLLOW THESE 

IMPORTANT SAFETY PRECAUTIONS

1. Your Pitts M-12s should not be considered a toy, but rather 
a sophisticated, working model that functions very much like 
a full-size airplane. Because of its performance capabilities, 
the Pitts M-12s, if not assembled and operated correctly, 
could possibly cause injury to yourself or spectators and 
damage to property.

2. 

You must assemble the model 

according to the 

instructions

. Do not alter or modify the model, as doing so 

may result in an unsafe or unfl yable model. In a few cases 
the instructions may differ slightly from the photos. In those 
instances the written instructions should be considered as 
correct.

3. You must take time to 

build straight, true

 and 

strong

.

4. You must use an R/C radio system that is in good condition, 
a correctly sized engine, and other components as specifi ed 
in this instruction manual. All components must be correctly 
installed so that the model operates correctly on the ground 
and in the air. You must check the operation of the model and 
all components before 

every

 fl ight.

5. If you are not an experienced pilot or have not fl own 
this type of model before, we recommend that you get the 
assistance of an experienced pilot in your R/C club for 
your fi rst fl ights. If you’re not a member of a club, your local 
hobby shop has information about clubs in your area whose 
membership includes experienced pilots. 

6. While this kit has been fl ight tested to exceed normal use, 
if an engine larger than one in the recommended range is 
used, the modeler is responsible for taking steps to reinforce 
the high stress points and/or substituting hardware more 
suitable for the increased stress. 

7. 

WARNING:

 The cowl, wheel pants and wing struts 

included in this kit are made of fi berglass, the fi bers of which 
may cause eye, skin and respiratory tract irritation. Never 
blow into a part (wheel pant, cowl) to remove fi berglass dust, 
as the dust will blow back into your eyes. Always wear safety 
goggles, a particle mask and rubber gloves when grinding, 
drilling and sanding fi berglass parts. Vacuum the parts and 
the work area thoroughly after working with fi berglass parts.

We, as the kit manufacturer, provide you with a top quality, 
thoroughly tested kit and instructions, but ultimately the 
quality and fl yability of your fi nished model depends 
on how you build it; therefore, we cannot in any way 
guarantee the performance of your completed model, 
and no representations are expressed or implied as to the 
performance or safety of your completed model.

Remember:

 

Take your time and follow the instructions to 

end up with a well-built model that is straight and true.

DECISIONS YOU MUST MAKE

This is a partial list of items required to fi nish the Pitts M-12s 
that may require planning or decision making before starting 
to build. Order numbers are provided in parentheses.

Radio Equipment

  

7-channel minimum but 9-channels or more is preferred. 
Servos of at least 150 oz.-in. on all control surfaces are 
required, such as the Futaba

®

  9155 (FUTM0215). The 

throttle can be a standard servo of at least 50 oz.-in. like 
the Futaba 9001 (FUTM0075).

  

7-10 channel receiver. Either a 2.4GHz receiver or 72MHz. 
All of our testing was done using the Futaba R617FS 
2.4GHz receiver (FUTM7627)

  

The radio must have the capability of independent reversing 
for each of the elevator servos or you will require the use 
of an in line servo reverser. The Futaba SR10 Dual Servo 
Reverser (FUTM4150) works well for this application.

  (

2) 24" [610mm] servo extensions (HCAM2711 for Futaba)

  (

5) 12" [305mm] servo extensions (HCAM2721 for Futaba)

  (

2) 6" Futaba dual servo extensions (FUTM4135)

  (

2) Heavy-duty switch harness (FUTM4385 for Futaba)

  (

2) Ernst charge jack (ERNM3001 for Futaba)

  (

2) Batteries, one 1500mAh minimum for the receiver and 

one 500mAh minimum for the electronic ignition.

Summary of Contents for Pitts M-12S

Page 1: ...he use by the user of the final user assembled product By the act of using the user assembled product the user accepts all resulting liability If the buyer is not prepared to accept the liability asso...

Page 2: ...www greatplanes com Open the Airplanes link then select the Pitts M 12s ARF If there is new technical information or changes to this model a tech notice box will appear in the upper left corner of the...

Page 3: ...kit has been ight tested to exceed normal use if an engine larger than one in the recommended range is used the modeler is responsible for taking steps to reinforce the high stress points and or subst...

Page 4: ...xy brushes 6 GPMR8060 Mixing sticks 50 GPMR8055 Mixing cups GPMR8056 Rotary tool such as Dremel Rotary tool reinforced cut off wheel GPMR8200 Stick on segmented lead weights GPMQ4485 IMPORTANT BUILDIN...

Page 5: ...a Visa or MasterCard number and expiration date for payment Mail parts orders and payments by personal check to Hobby Services 3002 N Apollo Drive Suite 1 Champaign IL 61822 Be certain to specify the...

Page 6: ...ection on page 5 2 Use a covering iron with a covering sock on high heat to tighten the covering if necessary Apply pressure over sheeted areas to thoroughly bond the covering to the wood BUILD THE WI...

Page 7: ...unting holes with a 1 16 1 6mm drill bit Install the servo onto the servo cover using the hardware included with your servo Center the servo and then install a servo arm as shown 5 Inside the servo ba...

Page 8: ...Make a mark on the wire that aligns with the front of the round portion of the clevis Remove the pushrod assembly from the servo Cut the wire on the mark and then solder the 4 40 solder clevis to the...

Page 9: ...vo arm and the second hole from the end of the aileron control arm Be sure to slide the clevis keepers over the clevis and tighten the 4 40 nut 11 Repeat steps 1 10 for the lower left wing panel the t...

Page 10: ...center section of the top wing centering the tubes 4 Use the same procedure used on the bottom wing to assemble the top wing Mix 3 4 ounces 22mL of 30 minute epoxy Pull the tubes out about 1 25 4mm B...

Page 11: ...of the fuselage 2 Secure the landing gear to the fuselage with three 8 32 x 3 4 19 1mm socket head cap screws 8 lock washers and a drop or two of thread locker 3 Repeat this for the other landing gear...

Page 12: ...Use a straightedge to guide the soldering iron at a rate that will just melt the covering and not burn into the wood The hotter the soldering iron the faster it must travel to melt a ne cut Peel off t...

Page 13: ...lower wing mounted to the airplane do so now Attach a berglass wing strut to the tabs on each of the wings Secure them with 4 40 x 1 2 12 7mm socket head cap screws 4 at washers and 4 40 lock nuts Do...

Page 14: ...rts 3 Glue the hardwood handle into the hole as shown Drill a 3 32 2 4mm hole through the end of each end through the handle and then screw a 4 x 1 2 12 7mm screw with a 4 at washer into the hole you...

Page 15: ...wing The stab should be parallel and in line with the wing If you nd that your stab is not aligned adjust the stab by removing small amounts of the stab saddle with 100 grit sandpaper 3 When you are s...

Page 16: ...onto one half of each of the hinges Insert a hinge into each of the holes in the stab Apply glue into the holes in the elevators and onto the other half of each hinge Slide the elevators onto the hing...

Page 17: ...the stab and n The four brackets with the shallow angle attach to the bottom of the stab 2 Install the brackets in the recesses in the stab and n Secure the brackets with a 2 56 x 1 2 12 7mm machine...

Page 18: ...er and a 2 56 metal clevis onto each of the threaded couplers 8 Attach the long rods between the n and the top of the stab and install the shorter rods to the bottom of the stab and the bottom of the...

Page 19: ...eel pant over the wheel and axle Attach the wheel pant to the landing gear with two 4 40 x 1 2 12 7mm socket head cap screws 4 lock washer and 4 at washer If the wheel is not centered in the wheel pan...

Page 20: ...properly your radio system must have the ability to adjust the servo direction independently from each other If your radio does not have this capability you will need to purchase an after market in l...

Page 21: ...tor and then feed the wire back through the crimp connector Squeeze the crimp connector rmly onto the wire to secure the threaded coupler to the wire Thread a 4 40 nut onto the coupler followed by the...

Page 22: ...mounting are for the Desert Aircraft DA 50 rear carb engine with 3 76mm stand offs If you will be mounting a different brand of engine you will have to modify your installation as needed to accommoda...

Page 23: ...nd a 2 56 threaded balls washer and nuts Choose whichever one best ts the hole in the arms Be sure that you use thread locker on the threads 5 Locate two plywood throttle pushrod supports Glue the lon...

Page 24: ...152mm wire pushrod Cut the threads so only 3 8 9 5mm of thread remain Cut the unthreaded end of the wire so that the overall length of the wire pushrod including the remaining thread is 4 7 16 112mm B...

Page 25: ...g to easily grab onto for activating the choke 13 Cut the 24 610mm white exible pushrod to a length of 16 406mm Thread the 1 25 4mm thread that you previously cut from the wire into one end of the exi...

Page 26: ...is a bit tedious we found that there was room at the front of the fuselage We recommend that you use a heavy duty switch such as the Futaba heavy duty charge switch FUTM4385 and the Ernst charge recep...

Page 27: ...ing the stopper assembly Insert the stopper so the vent tube will be at the top of the tank Then tighten the screw to squish the stopper and seal the tank Shake the tank to make sure the clunks can mo...

Page 28: ...then push the lines onto the holder 11 Place a piece of masking tape on the fuselage in line with each of the wood cowl mounting blocks Measure back 1 25 4mm from the center of each block Mark a line...

Page 29: ...might be interfering with the cowl spark plug boot muf er etc 15 Locate the ABS plastic engine baf e Place it in front of the cowl and mark the location of the cylinder head Cut this area from the baf...

Page 30: ...luminum spinner that has a scale shape and matching color to the airplane Completing the Radio Installation At this point you should have all of the servos installed All that remains is installing the...

Page 31: ...72MHz receiver we have installed a tube for the antenna Route the antenna into the tube 6 Plug all of the servo leads into the appropriate channels in the receiver Depending on your transmitter you m...

Page 32: ...4 40 x 1 2 12 7mm machine screws 4 at washers and 4 lock washers 3 Included in the kit is a cockpit oor To keep some of the weight down you might choose not to install it Installation is completely o...

Page 33: ...y the rest of the decals the same way GET THE MODEL READY TO FLY Check the Control Directions 1 Turn on the transmitter and receiver and center the trims If necessary remove the servo arms from the se...

Page 34: ...decrease the throw according to the measurements in the control throws chart 5 Measure and set the low rate elevator throws and the high and low rate throws for the rest of the control surfaces the s...

Page 35: ...rol horn PREFERRED PUSHROD HOOKUP Here is an optimum pushrod setup the pushrod is close in on the servo arm and far out on the control horn This situation gives the greatest mechanical advantage of th...

Page 36: ...3 If the tail drops the model is tail heavy If possible move the battery pack and or receiver forward to get the model to balance If the nose drops the model is nose heavy If possible move the battery...

Page 37: ...inde nitely Afterward shut the engine off and inspect the model closely making sure all fasteners pushrods and connections have remained tight and the hinges are secure Always ground check the operati...

Page 38: ...e elsewhere anticipating the excitement of the rst ight Because of this you may be more likely to overlook certain checks and procedures that should be performed before the model is own To help avoid...

Page 39: ...altitude before turning into the traf c pattern Flight For reassurance and to keep an eye on other traf c it is a good idea to have an assistant on the ight line with you Tell him to remind you to thr...

Page 40: ...DA 50 R 50cc GASOLINE ENGINE W REAR MOUNTED CARBURETOR UP 3 16 4 8mm THROTTLE PUSHROD 3 16 4 8mm CHOKE PUSHROD DRILL 1 4 6 35mm HOLES FOR MOUNTING BOLTS 66mm 78mm...

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