<br><font size=2 face="sans-serif">Hi All,</font>
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<br><font size=2 face="sans-serif">I had some fun running a ZDZ 40RE last night and I thought I would pass along the information: Setup. New ZDZ 40 RE, included Falcon ignition, APC IMAC 18x10 prop (waiting for Bambula larger props to arrive), header: Webra, muffler: D.H. can muffler from the ST2300 days, 93 Octane, Lawn Boy Ashless 2C oil (non-syn) mixed 32:1. Ingition battery, 4.8 volt Nimh. Three total runs, 5 minutes or so each, about 16 oz or less fuel used. Needles set at factory recommendation each, 1.5 turns open. </font>
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<br><font size=2 face="sans-serif">Took 4 flips with low throttle set, choke closed, to get fuel to the Walbro carb. 5th flip was a pop. I opened choke, 5th flip engine was running at idle speed. The engine ran fine alternating between high and low throttle, for about 5 minutes. The engine only quit once I discunnected the ignition battery. At a reasonable idle, the engine just ticked along. </font>
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<br><font size=2 face="sans-serif">I'll skip to the high lights. For the third run I leaned both needles about 1/4 turn. Engine was cleanly running without obvious richness as during ititial run. The throttle response was as near instant acceleration/deceleration as I've every heard from any gas/glow engine. Playing with the throttle pushrod, you can rev the throttle quickly, and as fast as you can move the throttle arm the engines rpms keeps up (rear induction rotary thing). My impression was that the engine was runnig/sounding like a highly tuned 2-cycle motorcross bike you would see in a stadium racetrack! This IS NOT A WEED-WACKER ENGINE!!!!!!!!!!!!!!!!!!!!!!! Later today I plan to run wth AL 140 sized tuned pipe. It was interesting to watch as no visible exhaust reside exits the muffler, where obviously before with a glow engine you see a huge wave of exhaust coming out. I've also watched a DA 50
run, and this ZDZ left me with a totally different opinion of gas engine throttle response. (again, we'll see after a few more runs and some air trials).</font>
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<br><font size=2 face="sans-serif">Of course, one nights good running does not a good engine make. I'll continue to investigate at least 2 gallons before installing in a plane. Thus far, the engine starts easily, can be turned over by my new starter (originally bought to handle the Webra 160), idles well, transisitions incredibly fast, and at least last night, left me with the impression that this small gas engine ran like a 2-cycle supercross engine! </font>
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<br><font size=2 face="sans-serif">Overall impressions, the look takes a little getting used to, I added a longer throttle arm to the carb, and the choke arm comes off at a wierd angle. Supplied hardware seem OK and the timing is VERY EASY to find TDC and set.</font>
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<br><font size=2 face="sans-serif">Vibration: What vibration? Running at idle, I placed my finger on the motor and there was hardly any vibration to take note of. I've had my own glow setups have periods of extreme vibration, where this exhibited nearly none. The new Falkon ignition setup now supplied is supposed to have reduced vibration, and from my perspective has obviously done so. Of course, the engine was essentially mounted to a large box so the mass of the box was much higher than the mass of the engine. </font>
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<br><font size=2 face="sans-serif">Anyway - trying to enjoy the hobby,</font>
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<br><font size=2 face="sans-serif">Jim W.<br>
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James Woodward<br>
Program Manager<br>
B/E Aerospace Business Jet Group - Miami<br>
9100 N.W. 105th Circle<br>
Miami, FL 33178<br>
(305) 459-7155 Office<br>
(305) 459-7185 Fax<br>
(954) 319-0873 Cellular</font>