The complete radio control model airplane FAQ.  


Dick Hanson's Hanger9 Edge540 With ZDZ40

This is my own version of adapting a 2.4 gasoline engine to the H9 540 ARF. The entire conversion shown is not a recommended or approved setup by the kit manufacturer or me. If you find any of the features can help you in adapting a gas engine, feel free to use as you see fit. Please remember that the modifications shown here provide far more power than any of the H9 suggested engine setups!
   The engine swings a 20x10 propeller in the low to mid 7000 rpm band! The finished weight on my model is well under the 13 lb max weight recommended by the manufacturer. I used the ZDZ 40 because it is very powerful and smooth running.
The total engine weight is is greater than any glow setup as it includes a special ignition, a large muffler and an ignition battery. This all adds up to almost 4 lbs. (engine bare is 2.9 lbs) Because of all of this additional weight, I removed weight not required ,such as the metal motor mount provided and the very sturdy mounting plate and forward side pieces.
Other gasoline engines of approximately the same size may be adapted as you may choose. Avoid heavier engines as the weight of this setup, though it all balances, approaches the maximum weight for decent performance.

Throttle servo and fuel tank mount.

Countersunk prop bolts --this was done to provide 1/8" more thread contact.

Cowl with flush bolts--The inside of the cowl has thin maple plates epoxied in place. These fit onto maple mounting blocks so that the bolt heads do not carry the cowl load. The maple plate does this job.

Elevator servos--these are the new miniature JR 368 digital w/ metal gears! 50 in oz torque.

Elevator servo --this is the servo hooked up for normal throws . Longer throws will require a longer servo arm.

Engine and muffler completed view. Note the spring wire hold down for the muffler.

Engine muffler bottom--underside view.

Engine on box--bare engine and muffler saddle view.

Gary and instruments .-over the shoulder peek.

Gary front view.

Motor box--made from 1/8" Superior lite plywood and a 1/4" thick 5 ply mounting face. All joints are gusseted with 1/4" triangular spruce. Finish is 1/2 oz fiberglass and epoxy flat paint. Motor box--Note the sides of the fuselage were sawed at a angle and the new pieces blended in.

Muffler assembly -- This muffler purchased from Amelung in Germany - It is the Diabolitin muffler.

Wing bay --showing the rudder servo and Rx and radio battery. NOTE: there is complete separation of all radio and ignition components!

Stabilizer saddle--this view shows servo holes and cutouts for the stabilizer mounting I used. 
The mount allows the stab to be removed or adjusted in angle.

Spinner CB--this 3" spinner is a good choice as it can be cut and fitted nicely and has a flat backplate

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