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| Beginners / Newbies Interested in getting in the hobby. Not sure where to start. Post your questions here and one of the RCCanada experts will be glad to help you out! |
Topic Review (Newest First)
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| 03-26-2011 07:40 AM | ||
| Arn |
Re: Fuel 101 for your reading pleasure ... http://rcvehicles.about.com/od/nitro...f/leanrich.htm and another ... http://www.hooked-on-rc-airplanes.co...ning-tips.html |
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| 03-25-2011 10:55 PM | ||
| OLD PRAIRIE RED NECK |
Re: Fuel 101 Am familliar with automotive engine oil temps. Corvair (air cooled) oil temp switches flagged at 230 F, ATF I believe is good to 250 F. Have an old VW van that would get oil temps up to 400 F on highway in summer - bearings went at 34,000 miles! Added oil cooler & kept oil temp under 250 F, engine now has 80,000 on new bearings, on problem yet. Had an old Skiddo 340 air cooled with cyl. head temp gauge, seems to me it red lined just over 300 F. Just some thoughts till we get the real goods. 
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| 03-25-2011 09:40 PM | ||
| groo |
Re: Fuel 101 At 300f you risk a hot short(potential cracking) condition in the brass. Most car motors run 210 during the first few break in cycles which heat treats the piston and sleeve. Then are leaned to btwn 240 to 270 depending on service requirements. Racing or not. I have run motors beyond300, but never long after. The rod brushings crack or they just wear out. Measure the side of the block nearest the head. There are other methods so don't take my word for it. I do have a 20 yr old oscz.12 and yes it still runs. I think its got 20 gals through it! |
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| 03-25-2011 09:29 PM | ||
| Guest |
Re: Fuel 101 Merv, it's called "sometimers" for the guys still actively flying! 
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| 03-25-2011 09:18 PM | ||
| OLD PRAIRIE RED NECK |
Re: Fuel 101 Quote:
Altitude effects 3 things in my experience #1 needle valve setting, #2 prop sizing, #3 load capacity of the wing. Not aware of any effects on running temp aside from #1. I know I have seen operation temps discussed somewhere, just can't remember where just now. Old timers disease?  Andrew: 
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| 03-25-2011 04:09 PM | ||
| Guest |
Re: Fuel 101 Would one of the first concerns be the Altitude above sea level where you begin your flight. I live 668M Above Sea Level, Markham On is 186M ASL. Isn't this going to effect the performance of the engine in the lean issue? I have a digital temperature gauge, and a Tach. I just assumed someone had done some research on the best operating temps. The tip on the smoke trail makes sense, thanks. |
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| 03-25-2011 12:53 PM | ||
| Arn |
Re: Fuel 101 Hi Brent .... have a look at these ..... http://www.osengines.com/accys/glowplugs.html http://www.osengines.com/accys/choosing-glowplugs.html I dont think anyone can give you a specific temperature value .... is more guidlines, trial and error etc ... Here's a few .. - after a few near or full power circuits around the field ... land and lightly touch the cylinder head as soon as you can after getting off the field and killing the engine ..... if your skin starts to sizzle like bacon it way to hot .... run richer or change to a colder plug .... if I can hold a fingetip on the headfins for a second or more then I'd say it probably OK. - while just generally poking holes in the sky .... I like to see a slight smoke trail being left behind .... it's an indication of excess lubrication - ie: there is more oil passing through the engine than it needed .... (not a bad thing) There are other things that affect how your engine will run .... air temp & humidity can change rapidly and affect performance ..... I'm sure you will figure it out .... and the people you fly with at your field will certainly have more then enough opinions for your consideration .... My advice ..... ALWAYS .... check your rich/lean before EVERY flight .... and resist the compulsion to squeeze that extra 300or 400 rpm out of the motor by going the "it's just 1 click" leaner route .... things will last a lot longer if you do .. |
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| 03-25-2011 11:20 AM | ||
| Guest |
Re: Fuel 101 Arn, you bring up a good point. Does anyone know the optimum operating temp for a glow engine? |
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| 03-25-2011 11:09 AM | ||
| Arn |
Re: Fuel 101 My basic fuel is Omega 5% .... and it runs just fine Spring thru Fall ... in all my engines .... .46's(4), .55(1), .61(4), .75(5), .90(1), 1.20(3), 1.40(1), 1.60(1) Mostly O/S's .... Moki 2.1 uses FAI ( 0% nitro) runs too hot on anything else. All use an O/S #8 plug and needle is set back 2-3 clicks back from your on ground lean condition. If you want to fly in near freezing temps or below .... then as earlier recommended up the nitro content and maybe consider an A3 plug ..... As far as AfterRun .... I've never used it ...... just clean things up .... wrap a sheetof paper towel around the exhaust port and keep in place with a rubber band ..... and put it away till next time .... |
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| 03-24-2011 10:37 PM | ||
| OLD PRAIRIE RED NECK |
Re: Fuel 101 Cougar 429's comments on nitro & oil are right on the money. For my part I run mostly 5% nitro & top up the oil content to 20% with castor. 10% nitro in the winter for easier starting. But then being an old guy with limits on the budget, I'm more interested in engine life than being the fastest guy on the field! And yes my 4 strokes are perfectly happy on 5%. |
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