OMP 60" Sbach 342 User manual

60” Sbach 342
Electric Aerobatic Aircraft

Specifications:
Wing Span: 60 inches
Length: 58 inches
Power: Hacker A50-14S
(or equivalent)
Battery: 3800 5-cell LiPo
ESC: 60-70 amp
Flying Weight: 4.75 - 5.25 lbs
OHIO MODEL PRODUCTS
199 Stratford Lane
Xenia, Ohio 45385
[phone]
www.ohiomodelplanes.com
email: [email protected]
All contents copyright 2012, Ohio Model Products
Version 2.0, January 2013
Dear OMP Customer,
Thank you for purchasing the new OMP/EG electric aerobatic aircraft. This manual covers the SBACH
342 electric aircraft. Ohio Model Products is known worldwide for the best profile aircraft designs around
and many innovative construction techniques. We’ve taken this expertise and teamed up with EG Aircraft
to bring this new model to the radio control enthusiasts. The new 60" Electric Sbach 342 is a state
of the art all out 3D machine for the most ardent 3D flyers. With a Hacker A50-14S or
equivalent motor and a 5 Cell Lipo and supplied side force generators, the Sbach can do
any 3D maneuver you can think of plus some. With a Hacker A40 or equivalent motor and
4 cell Lipo this plane is a gentle sport flyer for a lazy afternoon of flying. The OMP Sbach
comes with carbon fiber main and tail wheel landing gear assemblies, wing tube, battery
tray and painted CF spinner. The plane is also covered in Ultracote in three different color
schemes.
Sincerely,
John Drake and Bradley Petty
A QUICK WORD ABOUT SAFETY AND RADIO CONTROL FLYING MODELS
With radio control aircraft, like any hobby or sport, there are certain risks. The operator of these
models is responsible for these risks. If misused or abused, you may cause serious bodily injury and/or
damage to property. With this in mind, you will want to be certain that you build your model carefully
and correctly. If you are not an experienced flier, have your work checked and ask for help in learning to
fly safely. This model aircraft is not a toy and must be operated and flown in a safe manner at all
times. Always perform a pre-flight check of the model including all control surfaces, proper function of
the radio gear, structure, radio range, and any other area relating to the safe operation of this aircraft.

Models are not insurable but operators are. You can obtain coverage through membership in the
Academy of Model Aeronautics (AMA). For an AMA information package call 1-800-435-9262, ext.
292 or visit the AMA website at "www.modelaircraft.org".
By the act of using the final assembled model, the purchaser/operator accepts
all resulting liability.
OHIO MODEL PRODUCTS WARRANTY AND RETURN POLICY
Ohio Model Planes guarantees this product to be free from defects in both material and
workmanship at the date of purchase. This does not cover any parts damaged by use, misuse or
modification. In no case shall OMP's liability exceed the original cost of this kit. Because OMP has no
control over the final assembly or equipment/components used in the final assembly, no liability shall be
assumed for any damage resulting from the use of this model by the user. By the act of using the final
assembled model, the user accepts all resulting liability. If you should find any missing or damaged
parts, or have any questions about this product, please contact OMP within 30 days of the purchase in
order to be covered by our warranty. You may contact OMP at o[email protected] or call
OMP at [phone]. If you wish to return this product you must first contact OMP and a 15%
restocking fee will be assessed. Only unused products may be returned. The customer is responsible for
all return shipping charges both ways and any damage as a result of misuse or shipping.

Check out these Features:
Carbon Fiber Wing Tube
Carbon Fiber Main Landing Gear
Carbon Fiber Tail Wheel Assembly
Carbon Fiber Reinforced Fuselage
Carbon Fiber Battery Tray
Side Force Generators
Matching painted Carbon Fiber
Spinner
Advanced Ball Links and Pushrods
Extra Ultracote Covering for Repairs
Complete Hardware Package
Note: As with all kits, it’s a good idea to read all the instructions and study the parts
before you begin construction. Handle the parts of this kit with care so you do not
damage any of the structure or covering. Inspect all the parts for any shipping
damage and report any issues to OMP as soon as you can. Make sure you have a flat
and sturdy workbench and follow all safety advice for the tools and adhesives you
plan to use.

AIRCRAFT COVERING:
1. With all ARFs, varying temperatures and storage delays can cause covering material to loosen over
time and transportation. OMP recommends lightly going over all the covering with a covering iron
set at medium temperatures. Be sure to use a soft cover over your iron so you do not scratch the
covering surface. Be sure you go over all seams and edges of the covering to assure it is secure to the
airframe and other covering. Be careful not to apply too much heat or you may cause bubbles or
damage to the covering. A heat gun may also be used along with a soft cotton cloth to shrink and
adhere the covering. Again, be extremely careful when using a heat gun.
2. Some modelers prefer to seal the hinge gaps using strips of appropriate covering or clear trim tape.
We have found this to be helpful with models intended for higher speed flight or models with
unusually large hinge gaps. OMP aircraft utilize a very tight double beveled hinge line and do not
normally require this step. Sealing the hinge gaps is therefore left as an option for the modeler.
RUDDER INSTALLATION:
1. It is much easier to install the control horn before installing the rudder. Locate the carbon fiber rudder
control horn, ball links, and associated bolts and nylon-insert lock nuts. Use some fine sandpaper to
roughen up the center area of the control horn so that the glue adheres better. Using a sharp hobby knife
cut the covering away from the slots in the rudder and trial fit the control horn.
2. Mix up some 30 minute epoxy and coat the inside of the slot and the center of the control horn. Hint:
a scrap piece of 1/16” ply, tooth pick, or old hobby blade can be used to coat the inside of the rudder slot.
Slide the control horn in place and make sure it is centered perfectly by using a ruler to measure between
the pivot holes and the hinge line. Wipe any excess glue off with isopropyl alcohol and paper towels.
Set aside until cured.

3. The hinge slots for the rudder are pre-cut in the rudder and fin. Locate the CA hinges and align them in
the fin. Once aligned and centered in the fin glue in place with thin CA.
LANDING GEAR ASSEMBLY:
1. Locate the supplied main and tail wheel landing gear parts and sort them out on your workbench.

2. Bolt the main gear to the bottom of the fuselage using the supplied bolts. Use a small drop of thread-
lock to secure the bolts in place.

3. Install the main wheel axles to the composite landing gear and tighten the nylon-insert lock nut. Note
that the axle is a hex head bolt. The hex head part of the bolt is to the outside of the wheel. Use 1-2 nuts to
space the wheel from the axle for wheel pant fit. Insert axle and wheel in main landing gear and use a
nylon locking nut to secure axle and wheel to main gear. See picture below for clarity.

4. Fit the wheel pant in place and install using the two supplied wood screws. Repeat the above steps for
the other main gear.
5. Begin the tail wheel assembly by installing the shaft through the hole at the rear of the tail wheel
bracket. Note there is a wheel collar above and below the tail wheel bracket hole. Install the tail wheel
using two supplied wheel collars. Again, the use of thread-lock on any metal to metal screw is advised.

6. Center the tail wheel bracket on the rear of the fuselage. Note that the steering arm attaches into the
rudder and the steering arm shaft has to fit flush against the fin. Before attaching tail wheel assembly,
make a 90 degree bend in the last 1” of the shaft. Make sure that you make the bend in the right direction!
The bent part has to fit into the rudder to provide rudder steering on the ground. Screw the tail wheel
assembly in place using the two supplied wood screws. Remove the screws and harden the holes with a
drop of thin CA. Allow the CA to cure and then permanently install the tail wheel bracket. Don’t install
the rudder at this time.
RUDDER CONTROL INSTALLATION:
1. The SBACH 342 is supplied with a set of pull-pull cables and ball-links for mounting the rudder servo
on the radio trey. There are also servo mounts in the tail to mount the rudder servo. Depending on what
type of motor and battery size you install on the plane, you might want to mount the rudder servo in the
tail to help with plane balance. If you put the rudder servo in the tail, you can use the ball links however,
you will have to make your own rod for the rudder servo as this is not supplied. If you use a Hacker A50
series motor or equivalent and 5 or 6 cell Lipo, then mount the rudder servo in the tail. If you use an A40
series motor or equivalent motor and 4 cell Lipo, then mount the rudder servo on the radio trey. NOTE:
Due to the large amount of motors and batteries that can be used with the plane, I would make the
decision on where to mount the rudder servo until after the plane is finished and you have done some
preliminary CG checks.