click image for larger view

This is what is required for a typical in fuselage silencer installation when the engine is inverted. Extremely quiet and very powerful.
Displacement 48.5cc/2.96 ci
Bore 42mm/1.65"
Stroke 35mm/1.38"
RPM Range 1200-7800 RPM
Horsepower Approx. 5.1 HP
Weight 1400g/3.08 lbs! bare w/plug - 1530g/3.37lbs all up
Fuel/Ratio Premium Gas mixed 40:1
Piston Rod 2 Needle Bearings
Crankshaft 2 Ball Bearings
Ignition 4.8 Volt- Electronic
Porting 5 Channel Schunrle
Prop Size 2 blade 22x8, 22 x 10 3 blade 18x10-12, 20x10

ZDZ® Giant Scale Gas Engines are proudly made in the Czech Republic by ZDZ® Modelmotor s.r.a.. These engines are designed from scratch for RC Model Aircraft. No industrial engine or chain saw parts are used. Many years ago the ZDZ® ModelMotor engineering staff was given the daunting task of designing a family of gas fueled model airplane engines that must meet many conflicting specifications: Lightweight, Powerful, Low vibration levels in the single cylinder engines, Fuel efficient, Reliable, Long lived and easy to manufacture . They succeeded!

ZDZ engines have rotary valves*. This is one of the main reasons for the incredible throttle response of ZDZ RC gas engines. Most engineering experts agree that the rotary valve has brought the two-cycle engine its highest degree of efficiency and performance.

*ZDZ 80 R2, 100 R2 and 420 B4 have reed valves

Engine with Electronic Ignition     $585.00

  

 
Inverted Pitts Muffler $99.95
Side Mount Muffler $69.95
JMB 60/60/270 silencer with 25mm inlet $95.00
JMB 25mm Wraparound header with 25mm drop $45.00
JMB 25mm Adapter coupler with spring clamps $15.00
JMB Silencer mount with #334 o-ring $17.50
JMB rear grommet $2.00

 

Recommended Starting Procedure
for ZDZ Engines

 All ZDZ engines that use a rotary valve with fixed induction timing must use a unique starting procedure as compared to their piston ported or reed valve inducted counterparts.

 The starting procedure described below is most commonly referred to as the “5, 5 and 1” method. It is the preferred way to start a ZDZ engine once the carb has been primed.
For brand new engines, a richer low speed needle setting of approx. 2-1/2 turns out is required for initial fuel draw.

Step 1
 With the Choke completely closed and the Ignition system OFF, advance the throttle to full open, Flip the prop smartly 5 times.

Step 2
 Open the Choke completely, Leave the ignition system in the OFF position, leave the throttle at full open, and flip the prop smartly 5 more times.

Step 3
 Reduce the throttle completely and advance the trim to a mid to high setting, turn the ignition system ON, 1 smart Flip and the engine will start!



ZDZ® is a registered Trademark of RC Showcase, Inc.