Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

West 50 V1 Engine Queston

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Old 07-23-2003, 07:04 PM
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strong
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Default West 50 V1 Engine Queston

I have about 10 or 12 flights on my weston magnum so far and every thing is going great.It's has tons of power but I can only open the carburetor half way. If I go full open the engine will die.I have a rossi 105 that is the same way(very powerful).But is this normal.Also how many turns out on the high speed needle is used for max RPM's for this engine.
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Old 07-23-2003, 08:46 PM
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Default West 50 V1 Engine Queston

My West 50 runs with the carb all the way open, it needs to. I'm at about 1.5 turns on my needle I believe as well. Make sure your carb is tight and on straight and seated properly, not sucking air from somewhere it shouldn't be. My first West 50 wouldn't run past half throttle either, but that was a bad connecting rod that was slapping when it shouldn't have been. It didn't last long, it was one of very few bad engines and weston UK was phenominal in customer service.

But it should run with the carb wide open, all engines should. Check tightness of all the bolts as well, head, backplate, header, make sure you have no more than a 1/16" gap between the header and pipe. Also make sure your prop is good and balanced, past half throttle if it's out of whack it may just be foaming the fuel to much to run.
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Old 07-24-2003, 12:53 AM
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Default West 50 V1 Engine Queston

It might be the gap between the header and pipe because it's about 1/8 or bigger I'll reduce it tomorrow and see if that helps.I balance both the prop and spinner.
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Old 07-24-2003, 01:57 PM
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Default West 50 V1 Engine Queston

Thanks j ferguson,
I reduced the gap between the header and pipe and now it runs with carb wide open.......forums are great.
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Old 07-24-2003, 04:20 PM
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Default West 50 V1 Engine Queston

glad it worked

What happens is when you have to big of a gap, first of all you're probably not on pipe at all, but mostly, the silicon tube pulsates and won't allow the engine to come on pipe at all. Secondly, the silicon tube will burn out eventually. when I was flying pattern, if you cut your header to short (not really something you can do with the weston header on that engine LOL!) and I had to move the pipe back, i would cut a section of header tube that was left over to put back in the silicon tube so that there wasn't a big space with just the tubing there.
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Old 07-31-2003, 12:51 AM
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Default West 50 V1 Engine Queston

Jeremy, this is off the subject, but you sound like you know your stuff. What is a good fuel for the Weston 50, ie. percentage of nitro, synthetic oil, and Castor oil, etc.?
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Old 08-06-2003, 02:48 PM
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Default West 50 V1 Engine Queston

Mr. Spencer. Try westons own brand 'prosynth 10%'
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Old 08-06-2003, 05:16 PM
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Default West 50 V1 Engine Queston

Originally posted by C. Spencer
Jeremy, this is off the subject, but you sound like you know your stuff. What is a good fuel for the Weston 50, ie. percentage of nitro, synthetic oil, and Castor oil, etc.?

I'm still on the learning curve, but I've been running Powermaster 15% synthetic blend in my west 50's with no problems. I believe it's 18% oil (I will check when I go out to the shop though).
I can't get the prosynth up here (canada) so I use what I have access too
They are amazing engines though, I love them!
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