atul123
Posts: 61
Joined: 2/14/2008
From: Los Gatos,
CA, USA
Status: offline
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Hi All:
Before you flame me, do note that it is impossible here in Banalore, India to get 100% pure Methanol any more: by regulation, one can only get Methanol that already has 10% castor mixed in. Nitro is also of varying quality and costs $200/gallon (about $50/litre). Based on this, one can basically purchase a brand new YS 110 every 70 flights or so if one runs on FAI fuel, so that's the reason for this approach.
Here are the results of running the brand new YS-110 on FAI fuel (the recommended YS fuel is between 15% and 30% nitro).
The Engine was brand new. A beautiful piece of engineering one must say.
On straight fuel (FAI: 78% Methanol, 10% castor, 12% synthetic), the result were as follows (with a 15x6 prop to run-in)
The engine started on the first flick : no problems
Took it up to 4,000 RPM and ran it for 3-4 mins; no problems
maxed out the throttle for 10 secs : great transition; set high-speed needle to 1 1/3 turns (up from 1;25 to 1.33 basicallhy); came back to 4000 RPM (apparently this is recommended by Troy and other YS Experts). At this point, the engine started LOADING UP.
Closed the regulator 1/8 turn; marked improvement in transition; took engine up to max RPM for 10 secs (about 9500 - but it was 6 PM so the tach was not working well in the dying sunlight for some reason); came back down; much LESS loading up now
Closed the regulator another 1/8 turn; this time, the transition was even better and on coming back to 4,000 RPM, there was no more loading up!
Started setting the idle: about 2300 RPM (yet to be fully verified). Engine started loading up a bit, Leaned out low-speed needle the idle was too rich, so had to lean it out by a 1/4 turn
Result: the engine continued to run well. Ran a 12 oz tank for about 11 mins. Not bad! With ZERO nitro, the engine runs well enough. With Nitro, the engine will likely run smoother and one can likely get 400 to 500 RPM more and turn a bigger prop. But that's not my goal. The goal is to enjoy the YS power with 500 less RPM on a smaller model!
Cleanup: stopped engine after 2 tanks (had to run errands after that), and had a helper remove the blue tubing and clean out the engine (to prevent Castor Oil gunk from clogging the engine), with Kerosene (Airplane fuel).
Conclusion: YS Engines run great on no nitro. They are truly beautiful engines. Just follow Troy's run-in instructions and you can't go wrong. Zero Nitro definitely gives one less power and it takes time to set the needles properly, but the fact is that it does work. One has to keep it rich and follow the advise on running at 4,000 RPM and adjusting the regulator. I cannot understand why YS does not put this basic running information into its manuals!!
atul
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Printable Version
All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> YS Engines Support >> YS-110 - brand new - first run on FAI Fuel : report 
YS-110 - brand new - first run on FAI Fuel : report - 
Second, I wonder if you took the engine completely apart to remove all of the orange (SILOCONE O-RINGS). Did you use all new gaskets to reasemble the engine then. The Silocone goes alot farther into the engine than just the regulator. 
You would have been better off to flush the engine with straight alcohol, and then lube it with a little 
I would dismantle the complete engine, clean with alcohol or glowfuel, and reasemble with new orings and gasket's. This is the same thing that YS or Troy would tell you to do. 
