MikeRuth
Posts: 290
Joined: 3/6/2006
From: Tarzana, CA, USA
Status: offline
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Well I have read ll of this and not piped in as of yet, because frankly I did not have any information that was factual. Well I have some facts now.
1. My initial break in on a bench stand proved difficult until I discoverd the muffer pressure fitting had a piece or junk in it, not allowing any presure on the tank.
2. The OEM plug gave out after one run, basicly, that plug could not handle rich settings. Put in a OS F
3, bench run a gallon through it on a 18-6 APC prop.
4. Mounted it up in a Excelleron 90 and performed adjustments before heading out for the maiden flight.
5. The maiden went well, I didn't ask for much from the engine, just had to do a little trimming on the plane, but found my self climbing almost uncontrolably until I brought it down to 1/3 stick. Whew, we have power in a 10.25lb plane.
6. Had some dead stick issues although I was not blaming the engine as this mounting goes aganst all the recomended set up of this engine. When Up right engine inverted, carb nipple is low to the center line, when inverted the nipple is way to high. But I still tried some adjusting and got it to run a full tank through. Reliable? maybe
7. Yesterday we had some pretty strong winds blowing, maybe 20 -25 MPH with some gust above that. Not my favorite weather, but I decided on a flight anyways.
Took off all was well, but I found I really wasn't happy with the gustyness of the wind, so I set up and made a quick pass to feel it out for landing, I noticed the throttle was at a very fast idel, I went to full throttle and then cut it back, and it was wide open, after a couple of wild laps I decided to hit the CUT switch and see, nothing, still wide open. Now mind you this plane is over powerd by a bunch, so when flying up wind it was halling balls, and then down wind, well, lets say I was definelty in the Quickie 500 game.
this went on for about 5 or 6 minuets, all the time the air frame is getting the crap knocked out of it, as the wind is buffeting around up and down like a freakin yo yo. Looked like I had a serious radio problem. Well I was the only one in the sky, and a pilot was coming out, I yelled at them to hold on and the did. It finally ran dry and I had a non eventfull landing.
Getting a look at things, I see the throtle arm is broken, well that explains it! right? Nope, tried to move the barrel and it was frozen solid full open. After removing all the hardware and removing the body, it took several good blows to knock the barrel out. Seems as though a small piece of metal lodged in top of the groove that the set screws rides in to hold the barrel. I'm talking small, and it was not from the set screw, it is in perfect condition. Were this came from I have no Idea. I tore down the carb before break in and then had more than a gallon and a half of fuel through it before this happened. So very strange!
I orderd a perry 5002 carb and a vp-30 pump today, hopefully the ring and sleeve are ok. It now feels a little down on compression, although I had set it up rich on that last flight, but man thoose down wind runs had to let that baby really unload. So it's possible. I'll pull it and inspect it later this week.
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RE: ST2300 Testing and Experimenting - 
